Define UDIV_TIME on sparc64.
[kopensolaris-gnu/glibc.git] / stdlib / longlong.h
1 /* longlong.h -- definitions for mixed size 32/64 bit arithmetic.
2    Copyright (C) 1991,92,93,94,96,97,98,99 Free Software Foundation, Inc.
3    This file is part of the GNU C Library.
4
5    The GNU C Library is free software; you can redistribute it and/or
6    modify it under the terms of the GNU Library General Public License as
7    published by the Free Software Foundation; either version 2 of the
8    License, or (at your option) any later version.
9
10    The GNU C Library is distributed in the hope that it will be useful,
11    but WITHOUT ANY WARRANTY; without even the implied warranty of
12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13    Library General Public License for more details.
14
15    You should have received a copy of the GNU Library General Public
16    License along with the GNU C Library; see the file COPYING.LIB.  If not,
17    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18    Boston, MA 02111-1307, USA.  */
19
20 /* You have to define the following before including this file:
21
22    UWtype -- An unsigned type, default type for operations (typically a "word")
23    UHWtype -- An unsigned type, at least half the size of UWtype.
24    UDWtype -- An unsigned type, at least twice as large a UWtype
25    W_TYPE_SIZE -- size in bits of UWtype
26
27    SItype, USItype -- Signed and unsigned 32 bit types.
28    DItype, UDItype -- Signed and unsigned 64 bit types.
29
30    On a 32 bit machine UWtype should typically be USItype;
31    on a 64 bit machine, UWtype should typically be UDItype.
32 */
33
34 #define __BITS4 (W_TYPE_SIZE / 4)
35 #define __ll_B ((UWtype) 1 << (W_TYPE_SIZE / 2))
36 #define __ll_lowpart(t) ((UWtype) (t) & (__ll_B - 1))
37 #define __ll_highpart(t) ((UWtype) (t) >> (W_TYPE_SIZE / 2))
38
39 /* This is used to make sure no undesirable sharing between different libraries
40    that use this file takes place.  */
41 #ifndef __MPN
42 #define __MPN(x) __##x
43 #endif
44
45 /* Define auxiliary asm macros.
46
47    1) umul_ppmm(high_prod, low_prod, multipler, multiplicand) multiplies two
48    UWtype integers MULTIPLER and MULTIPLICAND, and generates a two UWtype
49    word product in HIGH_PROD and LOW_PROD.
50
51    2) __umulsidi3(a,b) multiplies two UWtype integers A and B, and returns a
52    UDWtype product.  This is just a variant of umul_ppmm.
53
54    3) udiv_qrnnd(quotient, remainder, high_numerator, low_numerator,
55    denominator) divides a UDWtype, composed by the UWtype integers
56    HIGH_NUMERATOR and LOW_NUMERATOR, by DENOMINATOR and places the quotient
57    in QUOTIENT and the remainder in REMAINDER.  HIGH_NUMERATOR must be less
58    than DENOMINATOR for correct operation.  If, in addition, the most
59    significant bit of DENOMINATOR must be 1, then the pre-processor symbol
60    UDIV_NEEDS_NORMALIZATION is defined to 1.
61
62    4) sdiv_qrnnd(quotient, remainder, high_numerator, low_numerator,
63    denominator).  Like udiv_qrnnd but the numbers are signed.  The quotient
64    is rounded towards 0.
65
66    5) count_leading_zeros(count, x) counts the number of zero-bits from the
67    msb to the first non-zero bit in the UWtype X.  This is the number of
68    steps X needs to be shifted left to set the msb.  Undefined for X == 0,
69    unless the symbol COUNT_LEADING_ZEROS_0 is defined to some value.
70
71    6) count_trailing_zeros(count, x) like count_leading_zeros, but counts
72    from the least significant end.
73
74    7) add_ssaaaa(high_sum, low_sum, high_addend_1, low_addend_1,
75    high_addend_2, low_addend_2) adds two UWtype integers, composed by
76    HIGH_ADDEND_1 and LOW_ADDEND_1, and HIGH_ADDEND_2 and LOW_ADDEND_2
77    respectively.  The result is placed in HIGH_SUM and LOW_SUM.  Overflow
78    (i.e. carry out) is not stored anywhere, and is lost.
79
80    8) sub_ddmmss(high_difference, low_difference, high_minuend, low_minuend,
81    high_subtrahend, low_subtrahend) subtracts two two-word UWtype integers,
82    composed by HIGH_MINUEND_1 and LOW_MINUEND_1, and HIGH_SUBTRAHEND_2 and
83    LOW_SUBTRAHEND_2 respectively.  The result is placed in HIGH_DIFFERENCE
84    and LOW_DIFFERENCE.  Overflow (i.e. carry out) is not stored anywhere,
85    and is lost.
86
87    If any of these macros are left undefined for a particular CPU,
88    C macros are used.  */
89
90 /* The CPUs come in alphabetical order below.
91
92    Please add support for more CPUs here, or improve the current support
93    for the CPUs below!  */
94
95 #if defined (__GNUC__) && !defined (NO_ASM)
96
97 /* We sometimes need to clobber "cc" with gcc2, but that would not be
98    understood by gcc1.  Use cpp to avoid major code duplication.  */
99 #if __GNUC__ < 2
100 #define __CLOBBER_CC
101 #define __AND_CLOBBER_CC
102 #else /* __GNUC__ >= 2 */
103 #define __CLOBBER_CC : "cc"
104 #define __AND_CLOBBER_CC , "cc"
105 #endif /* __GNUC__ < 2 */
106
107 #if (defined (__a29k__) || defined (_AM29K)) && W_TYPE_SIZE == 32
108 #define add_ssaaaa(sh, sl, ah, al, bh, bl) \
109   __asm__ ("add %1,%4,%5
110         addc %0,%2,%3"                                                  \
111            : "=r" ((USItype)(sh)),                                      \
112             "=&r" ((USItype)(sl))                                       \
113            : "%r" ((USItype)(ah)),                                      \
114              "rI" ((USItype)(bh)),                                      \
115              "%r" ((USItype)(al)),                                      \
116              "rI" ((USItype)(bl)))
117 #define sub_ddmmss(sh, sl, ah, al, bh, bl) \
118   __asm__ ("sub %1,%4,%5
119         subc %0,%2,%3"                                                  \
120            : "=r" ((USItype)(sh)),                                      \
121              "=&r" ((USItype)(sl))                                      \
122            : "r" ((USItype)(ah)),                                       \
123              "rI" ((USItype)(bh)),                                      \
124              "r" ((USItype)(al)),                                       \
125              "rI" ((USItype)(bl)))
126 #define umul_ppmm(xh, xl, m0, m1) \
127   do {                                                                  \
128     USItype __m0 = (m0), __m1 = (m1);                                   \
129     __asm__ ("multiplu %0,%1,%2"                                        \
130              : "=r" ((USItype)(xl))                                     \
131              : "r" (__m0),                                              \
132                "r" (__m1));                                             \
133     __asm__ ("multmu %0,%1,%2"                                          \
134              : "=r" ((USItype)(xh))                                     \
135              : "r" (__m0),                                              \
136                "r" (__m1));                                             \
137   } while (0)
138 #define udiv_qrnnd(q, r, n1, n0, d) \
139   __asm__ ("dividu %0,%3,%4"                                            \
140            : "=r" ((USItype)(q)),                                       \
141              "=q" ((USItype)(r))                                        \
142            : "1" ((USItype)(n1)),                                       \
143              "r" ((USItype)(n0)),                                       \
144              "r" ((USItype)(d)))
145 #define count_leading_zeros(count, x) \
146     __asm__ ("clz %0,%1"                                                \
147              : "=r" ((USItype)(count))                                  \
148              : "r" ((USItype)(x)))
149 #define COUNT_LEADING_ZEROS_0 32
150 #endif /* __a29k__ */
151
152 #if defined (__alpha) && W_TYPE_SIZE == 64
153 #define umul_ppmm(ph, pl, m0, m1) \
154   do {                                                                  \
155     UDItype __m0 = (m0), __m1 = (m1);                                   \
156     __asm__ ("umulh %r1,%2,%0"                                          \
157              : "=r" ((UDItype) ph)                                      \
158              : "%rJ" (__m0),                                            \
159                "rI" (__m1));                                            \
160     (pl) = __m0 * __m1;                                                 \
161   } while (0)
162 #define UMUL_TIME 46
163 #ifndef LONGLONG_STANDALONE
164 #define udiv_qrnnd(q, r, n1, n0, d) \
165   do { UDItype __r;                                                     \
166     (q) = __udiv_qrnnd (&__r, (n1), (n0), (d));                         \
167     (r) = __r;                                                          \
168   } while (0)
169 extern UDItype __udiv_qrnnd __P ((UDItype *, UDItype, UDItype, UDItype));
170 #define UDIV_TIME 220
171 #endif /* LONGLONG_STANDALONE */
172 #endif /* __alpha */
173
174 #if defined (__arm__) && W_TYPE_SIZE == 32
175 #define add_ssaaaa(sh, sl, ah, al, bh, bl) \
176   __asm__ ("adds        %1, %4, %5
177         adc     %0, %2, %3"                                             \
178            : "=r" ((USItype)(sh)),                                      \
179              "=&r" ((USItype)(sl))                                      \
180            : "%r" ((USItype)(ah)),                                      \
181              "rI" ((USItype)(bh)),                                      \
182              "%r" ((USItype)(al)),                                      \
183              "rI" ((USItype)(bl)))
184 #define sub_ddmmss(sh, sl, ah, al, bh, bl) \
185   __asm__ ("subs        %1, %4, %5
186         sbc     %0, %2, %3"                                             \
187            : "=r" ((USItype)(sh)),                                      \
188              "=&r" ((USItype)(sl))                                      \
189            : "r" ((USItype)(ah)),                                       \
190              "rI" ((USItype)(bh)),                                      \
191              "r" ((USItype)(al)),                                       \
192              "rI" ((USItype)(bl)))
193 #if 0
194 #define umul_ppmm(xh, xl, a, b) \
195   __asm__ ("%@ Inlined umul_ppmm
196         mov     %|r0, %2, lsr #16
197         mov     %|r2, %3, lsr #16
198         bic     %|r1, %2, %|r0, lsl #16
199         bic     %|r2, %3, %|r2, lsl #16
200         mul     %1, %|r1, %|r2
201         mul     %|r2, %|r0, %|r2
202         mul     %|r1, %0, %|r1
203         mul     %0, %|r0, %0
204         adds    %|r1, %|r2, %|r1
205         addcs   %0, %0, #65536
206         adds    %1, %1, %|r1, lsl #16
207         adc     %0, %0, %|r1, lsr #16"                                  \
208            : "=&r" ((USItype)(xh)),                                     \
209              "=r" ((USItype)(xl))                                       \
210            : "r" ((USItype)(a)),                                        \
211              "r" ((USItype)(b))                                         \
212            : "r0", "r1", "r2")
213 #define UMUL_TIME 20
214 #define UDIV_TIME 100
215 #endif
216 #endif /* __arm__ */
217
218 #if defined (__clipper__) && W_TYPE_SIZE == 32
219 #define umul_ppmm(w1, w0, u, v) \
220   ({union {UDItype __ll;                                                \
221            struct {USItype __l, __h;} __i;                              \
222           } __xx;                                                       \
223   __asm__ ("mulwux %2,%0"                                               \
224            : "=r" (__xx.__ll)                                           \
225            : "%0" ((USItype)(u)),                                       \
226              "r" ((USItype)(v)));                                       \
227   (w1) = __xx.__i.__h; (w0) = __xx.__i.__l;})
228 #define smul_ppmm(w1, w0, u, v) \
229   ({union {DItype __ll;                                                 \
230            struct {SItype __l, __h;} __i;                               \
231           } __xx;                                                       \
232   __asm__ ("mulwx %2,%0"                                                \
233            : "=r" (__xx.__ll)                                           \
234            : "%0" ((SItype)(u)),                                        \
235              "r" ((SItype)(v)));                                        \
236   (w1) = __xx.__i.__h; (w0) = __xx.__i.__l;})
237 #define __umulsidi3(u, v) \
238   ({UDItype __w;                                                        \
239     __asm__ ("mulwux %2,%0"                                             \
240              : "=r" (__w)                                               \
241              : "%0" ((USItype)(u)),                                     \
242                "r" ((USItype)(v)));                                     \
243     __w; })
244 #endif /* __clipper__ */
245
246 #if defined (__gmicro__) && W_TYPE_SIZE == 32
247 #define add_ssaaaa(sh, sl, ah, al, bh, bl) \
248   __asm__ ("add.w %5,%1
249         addx %3,%0"                                                     \
250            : "=g" ((USItype)(sh)),                                      \
251              "=&g" ((USItype)(sl))                                      \
252            : "%0" ((USItype)(ah)),                                      \
253              "g" ((USItype)(bh)),                                       \
254              "%1" ((USItype)(al)),                                      \
255              "g" ((USItype)(bl)))
256 #define sub_ddmmss(sh, sl, ah, al, bh, bl) \
257   __asm__ ("sub.w %5,%1
258         subx %3,%0"                                                     \
259            : "=g" ((USItype)(sh)),                                      \
260              "=&g" ((USItype)(sl))                                      \
261            : "0" ((USItype)(ah)),                                       \
262              "g" ((USItype)(bh)),                                       \
263              "1" ((USItype)(al)),                                       \
264              "g" ((USItype)(bl)))
265 #define umul_ppmm(ph, pl, m0, m1) \
266   __asm__ ("mulx %3,%0,%1"                                              \
267            : "=g" ((USItype)(ph)),                                      \
268              "=r" ((USItype)(pl))                                       \
269            : "%0" ((USItype)(m0)),                                      \
270              "g" ((USItype)(m1)))
271 #define udiv_qrnnd(q, r, nh, nl, d) \
272   __asm__ ("divx %4,%0,%1"                                              \
273            : "=g" ((USItype)(q)),                                       \
274              "=r" ((USItype)(r))                                        \
275            : "1" ((USItype)(nh)),                                       \
276              "0" ((USItype)(nl)),                                       \
277              "g" ((USItype)(d)))
278 #define count_leading_zeros(count, x) \
279   __asm__ ("bsch/1 %1,%0"                                               \
280            : "=g" (count)                                               \
281            : "g" ((USItype)(x)),                                        \
282              "0" ((USItype)0))
283 #endif
284
285 #if defined (__hppa) && W_TYPE_SIZE == 32
286 #define add_ssaaaa(sh, sl, ah, al, bh, bl) \
287   __asm__ ("add %4,%5,%1
288         addc %2,%3,%0"                                                  \
289            : "=r" ((USItype)(sh)),                                      \
290              "=&r" ((USItype)(sl))                                      \
291            : "%rM" ((USItype)(ah)),                                     \
292              "rM" ((USItype)(bh)),                                      \
293              "%rM" ((USItype)(al)),                                     \
294              "rM" ((USItype)(bl)))
295 #define sub_ddmmss(sh, sl, ah, al, bh, bl) \
296   __asm__ ("sub %4,%5,%1
297         subb %2,%3,%0"                                                  \
298            : "=r" ((USItype)(sh)),                                      \
299              "=&r" ((USItype)(sl))                                      \
300            : "rM" ((USItype)(ah)),                                      \
301              "rM" ((USItype)(bh)),                                      \
302              "rM" ((USItype)(al)),                                      \
303              "rM" ((USItype)(bl)))
304 #if defined (_PA_RISC1_1)
305 #define umul_ppmm(wh, wl, u, v) \
306   do {                                                                  \
307     union {UDItype __ll;                                                \
308            struct {USItype __h, __l;} __i;                              \
309           } __xx;                                                       \
310     __asm__ ("xmpyu %1,%2,%0"                                           \
311              : "=*f" (__xx.__ll)                                        \
312              : "*f" ((USItype)(u)),                                     \
313                "*f" ((USItype)(v)));                                    \
314     (wh) = __xx.__i.__h;                                                \
315     (wl) = __xx.__i.__l;                                                \
316   } while (0)
317 #define UMUL_TIME 8
318 #define UDIV_TIME 60
319 #else
320 #define UMUL_TIME 40
321 #define UDIV_TIME 80
322 #endif
323 #ifndef LONGLONG_STANDALONE
324 #define udiv_qrnnd(q, r, n1, n0, d) \
325   do { USItype __r;                                                     \
326     (q) = __udiv_qrnnd (&__r, (n1), (n0), (d));                         \
327     (r) = __r;                                                          \
328   } while (0)
329 extern USItype __udiv_qrnnd ();
330 #endif /* LONGLONG_STANDALONE */
331 #define count_leading_zeros(count, x) \
332   do {                                                                  \
333     USItype __tmp;                                                      \
334     __asm__ (                                                           \
335        "ldi             1,%0
336         extru,=         %1,15,16,%%r0           ; Bits 31..16 zero?
337         extru,tr        %1,15,16,%1             ; No.  Shift down, skip add.
338         ldo             16(%0),%0               ; Yes.  Perform add.
339         extru,=         %1,23,8,%%r0            ; Bits 15..8 zero?
340         extru,tr        %1,23,8,%1              ; No.  Shift down, skip add.
341         ldo             8(%0),%0                ; Yes.  Perform add.
342         extru,=         %1,27,4,%%r0            ; Bits 7..4 zero?
343         extru,tr        %1,27,4,%1              ; No.  Shift down, skip add.
344         ldo             4(%0),%0                ; Yes.  Perform add.
345         extru,=         %1,29,2,%%r0            ; Bits 3..2 zero?
346         extru,tr        %1,29,2,%1              ; No.  Shift down, skip add.
347         ldo             2(%0),%0                ; Yes.  Perform add.
348         extru           %1,30,1,%1              ; Extract bit 1.
349         sub             %0,%1,%0                ; Subtract it.
350         " : "=r" (count), "=r" (__tmp) : "1" (x));                      \
351   } while (0)
352 #endif /* hppa */
353
354 #if (defined (__i370__) || defined (__mvs__)) && W_TYPE_SIZE == 32
355 #define umul_ppmm(xh, xl, m0, m1) \
356   do {                                                                  \
357     union {UDItype __ll;                                                \
358            struct {USItype __h, __l;} __i;                              \
359           } __xx;                                                       \
360     USItype __m0 = (m0), __m1 = (m1);                                   \
361     __asm__ ("mr %0,%3"                                                 \
362              : "=r" (__xx.__i.__h),                                     \
363                "=r" (__xx.__i.__l)                                      \
364              : "%1" (__m0),                                             \
365                "r" (__m1));                                             \
366     (xh) = __xx.__i.__h; (xl) = __xx.__i.__l;                           \
367     (xh) += ((((SItype) __m0 >> 31) & __m1)                             \
368              + (((SItype) __m1 >> 31) & __m0));                         \
369   } while (0)
370 #define smul_ppmm(xh, xl, m0, m1) \
371   do {                                                                  \
372     union {DItype __ll;                                                 \
373            struct {USItype __h, __l;} __i;                              \
374           } __xx;                                                       \
375     __asm__ ("mr %0,%3"                                                 \
376              : "=r" (__xx.__i.__h),                                     \
377                "=r" (__xx.__i.__l)                                      \
378              : "%1" (m0),                                               \
379                "r" (m1));                                               \
380     (xh) = __xx.__i.__h; (xl) = __xx.__i.__l;                           \
381   } while (0)
382 #define sdiv_qrnnd(q, r, n1, n0, d) \
383   do {                                                                  \
384     union {DItype __ll;                                                 \
385            struct {USItype __h, __l;} __i;                              \
386           } __xx;                                                       \
387     __xx.__i.__h = n1; __xx.__i.__l = n0;                               \
388     __asm__ ("dr %0,%2"                                                 \
389              : "=r" (__xx.__ll)                                         \
390              : "0" (__xx.__ll), "r" (d));                               \
391     (q) = __xx.__i.__l; (r) = __xx.__i.__h;                             \
392   } while (0)
393 #endif
394
395 #if (defined (__i386__) || defined (__i486__)) && W_TYPE_SIZE == 32
396 #define add_ssaaaa(sh, sl, ah, al, bh, bl) \
397   __asm__ ("addl %5,%1
398         adcl %3,%0"                                                     \
399            : "=r" ((USItype)(sh)),                                      \
400              "=&r" ((USItype)(sl))                                      \
401            : "%0" ((USItype)(ah)),                                      \
402              "g" ((USItype)(bh)),                                       \
403              "%1" ((USItype)(al)),                                      \
404              "g" ((USItype)(bl)))
405 #define sub_ddmmss(sh, sl, ah, al, bh, bl) \
406   __asm__ ("subl %5,%1
407         sbbl %3,%0"                                                     \
408            : "=r" ((USItype)(sh)),                                      \
409              "=&r" ((USItype)(sl))                                      \
410            : "0" ((USItype)(ah)),                                       \
411              "g" ((USItype)(bh)),                                       \
412              "1" ((USItype)(al)),                                       \
413              "g" ((USItype)(bl)))
414 #define umul_ppmm(w1, w0, u, v) \
415   __asm__ ("mull %3"                                                    \
416            : "=a" ((USItype)(w0)),                                      \
417              "=d" ((USItype)(w1))                                       \
418            : "%0" ((USItype)(u)),                                       \
419              "rm" ((USItype)(v)))
420 #define udiv_qrnnd(q, r, n1, n0, d) \
421   __asm__ ("divl %4"                                                    \
422            : "=a" ((USItype)(q)),                                       \
423              "=d" ((USItype)(r))                                        \
424            : "0" ((USItype)(n0)),                                       \
425              "1" ((USItype)(n1)),                                       \
426              "rm" ((USItype)(d)))
427 #define count_leading_zeros(count, x) \
428   do {                                                                  \
429     USItype __cbtmp;                                                    \
430     __asm__ ("bsrl %1,%0"                                               \
431              : "=r" (__cbtmp) : "rm" ((USItype)(x)));                   \
432     (count) = __cbtmp ^ 31;                                             \
433   } while (0)
434 #define count_trailing_zeros(count, x) \
435   __asm__ ("bsfl %1,%0" : "=r" (count) : "rm" ((USItype)(x)))
436 #ifndef UMUL_TIME
437 #define UMUL_TIME 40
438 #endif
439 #ifndef UDIV_TIME
440 #define UDIV_TIME 40
441 #endif
442 #endif /* 80x86 */
443
444 #if defined (__i860__) && W_TYPE_SIZE == 32
445 #define rshift_rhlc(r,h,l,c) \
446   __asm__ ("shr %3,r0,r0\;shrd %1,%2,%0"                                \
447            "=r" (r) : "r" (h), "r" (l), "rn" (c))
448 #endif /* i860 */
449
450 #if defined (__i960__) && W_TYPE_SIZE == 32
451 #define add_ssaaaa(sh, sl, ah, al, bh, bl) \
452   __asm__ ("cmpo 1,0\;addc %5,%4,%1\;addc %3,%2,%0"                     \
453            : "=r" ((USItype)(sh)),                                      \
454              "=&r" ((USItype)(sl))                                      \
455            : "%dI" ((USItype)(ah)),                                     \
456              "dI" ((USItype)(bh)),                                      \
457              "%dI" ((USItype)(al)),                                     \
458              "dI" ((USItype)(bl)))
459 #define sub_ddmmss(sh, sl, ah, al, bh, bl) \
460   __asm__ ("cmpo 0,0\;subc %5,%4,%1\;subc %3,%2,%0"                     \
461            : "=r" ((USItype)(sh)),                                      \
462              "=&r" ((USItype)(sl))                                      \
463            : "dI" ((USItype)(ah)),                                      \
464              "dI" ((USItype)(bh)),                                      \
465              "dI" ((USItype)(al)),                                      \
466              "dI" ((USItype)(bl)))
467 #define umul_ppmm(w1, w0, u, v) \
468   ({union {UDItype __ll;                                                \
469            struct {USItype __l, __h;} __i;                              \
470           } __xx;                                                       \
471   __asm__ ("emul        %2,%1,%0"                                       \
472            : "=d" (__xx.__ll)                                           \
473            : "%dI" ((USItype)(u)),                                      \
474              "dI" ((USItype)(v)));                                      \
475   (w1) = __xx.__i.__h; (w0) = __xx.__i.__l;})
476 #define __umulsidi3(u, v) \
477   ({UDItype __w;                                                        \
478     __asm__ ("emul      %2,%1,%0"                                       \
479              : "=d" (__w)                                               \
480              : "%dI" ((USItype)(u)),                                    \
481                "dI" ((USItype)(v)));                                    \
482     __w; })
483 #define udiv_qrnnd(q, r, nh, nl, d) \
484   do {                                                                  \
485     union {UDItype __ll;                                                \
486            struct {USItype __l, __h;} __i;                              \
487           } __nn;                                                       \
488     __nn.__i.__h = (nh); __nn.__i.__l = (nl);                           \
489     __asm__ ("ediv %d,%n,%0"                                            \
490            : "=d" (__rq.__ll)                                           \
491            : "dI" (__nn.__ll),                                          \
492              "dI" ((USItype)(d)));                                      \
493     (r) = __rq.__i.__l; (q) = __rq.__i.__h;                             \
494   } while (0)
495 #define count_leading_zeros(count, x) \
496   do {                                                                  \
497     USItype __cbtmp;                                                    \
498     __asm__ ("scanbit %1,%0"                                            \
499              : "=r" (__cbtmp)                                           \
500              : "r" ((USItype)(x)));                                     \
501     (count) = __cbtmp ^ 31;                                             \
502   } while (0)
503 #define COUNT_LEADING_ZEROS_0 (-32) /* sic */
504 #if defined (__i960mx)          /* what is the proper symbol to test??? */
505 #define rshift_rhlc(r,h,l,c) \
506   do {                                                                  \
507     union {UDItype __ll;                                                \
508            struct {USItype __l, __h;} __i;                              \
509           } __nn;                                                       \
510     __nn.__i.__h = (h); __nn.__i.__l = (l);                             \
511     __asm__ ("shre %2,%1,%0"                                            \
512              : "=d" (r) : "dI" (__nn.__ll), "dI" (c));                  \
513   }
514 #endif /* i960mx */
515 #endif /* i960 */
516
517 #if (defined (__mc68000__) || defined (__mc68020__) || defined (__NeXT__) || defined(mc68020)) && W_TYPE_SIZE == 32
518 #define add_ssaaaa(sh, sl, ah, al, bh, bl) \
519   __asm__ ("add%.l %5,%1
520         addx%.l %3,%0"                                                  \
521            : "=d" ((USItype)(sh)),                                      \
522              "=&d" ((USItype)(sl))                                      \
523            : "%0" ((USItype)(ah)),                                      \
524              "d" ((USItype)(bh)),                                       \
525              "%1" ((USItype)(al)),                                      \
526              "g" ((USItype)(bl)))
527 #define sub_ddmmss(sh, sl, ah, al, bh, bl) \
528   __asm__ ("sub%.l %5,%1
529         subx%.l %3,%0"                                                  \
530            : "=d" ((USItype)(sh)),                                      \
531              "=&d" ((USItype)(sl))                                      \
532            : "0" ((USItype)(ah)),                                       \
533              "d" ((USItype)(bh)),                                       \
534              "1" ((USItype)(al)),                                       \
535              "g" ((USItype)(bl)))
536 #if (defined (__mc68020__) || defined (__NeXT__) || defined(mc68020))
537 #define umul_ppmm(w1, w0, u, v) \
538   __asm__ ("mulu%.l %3,%1:%0"                                           \
539            : "=d" ((USItype)(w0)),                                      \
540              "=d" ((USItype)(w1))                                       \
541            : "%0" ((USItype)(u)),                                       \
542              "dmi" ((USItype)(v)))
543 #define UMUL_TIME 45
544 #define udiv_qrnnd(q, r, n1, n0, d) \
545   __asm__ ("divu%.l %4,%1:%0"                                           \
546            : "=d" ((USItype)(q)),                                       \
547              "=d" ((USItype)(r))                                        \
548            : "0" ((USItype)(n0)),                                       \
549              "1" ((USItype)(n1)),                                       \
550              "dmi" ((USItype)(d)))
551 #define UDIV_TIME 90
552 #define sdiv_qrnnd(q, r, n1, n0, d) \
553   __asm__ ("divs%.l %4,%1:%0"                                           \
554            : "=d" ((USItype)(q)),                                       \
555              "=d" ((USItype)(r))                                        \
556            : "0" ((USItype)(n0)),                                       \
557              "1" ((USItype)(n1)),                                       \
558              "dmi" ((USItype)(d)))
559 #define count_leading_zeros(count, x) \
560   __asm__ ("bfffo %1{%b2:%b2},%0"                                       \
561            : "=d" ((USItype)(count))                                    \
562            : "od" ((USItype)(x)), "n" (0))
563 #define COUNT_LEADING_ZEROS_0 32
564 #else /* not mc68020 */
565 #define umul_ppmm(xh, xl, a, b) \
566   do { USItype __umul_tmp1, __umul_tmp2;                                \
567         __asm__ ("| Inlined umul_ppmm
568         move%.l %5,%3
569         move%.l %2,%0
570         move%.w %3,%1
571         swap    %3
572         swap    %0
573         mulu    %2,%1
574         mulu    %3,%0
575         mulu    %2,%3
576         swap    %2
577         mulu    %5,%2
578         add%.l  %3,%2
579         jcc     1f
580         add%.l  %#0x10000,%0
581 1:      move%.l %2,%3
582         clr%.w  %2
583         swap    %2
584         swap    %3
585         clr%.w  %3
586         add%.l  %3,%1
587         addx%.l %2,%0
588         | End inlined umul_ppmm"                                        \
589               : "=&d" ((USItype)(xh)), "=&d" ((USItype)(xl)),           \
590                 "=d" (__umul_tmp1), "=&d" (__umul_tmp2)                 \
591               : "%2" ((USItype)(a)), "d" ((USItype)(b)));               \
592   } while (0)
593 #define UMUL_TIME 100
594 #define UDIV_TIME 400
595 #endif /* not mc68020 */
596 #endif /* mc68000 */
597
598 #if defined (__m88000__) && W_TYPE_SIZE == 32
599 #define add_ssaaaa(sh, sl, ah, al, bh, bl) \
600   __asm__ ("addu.co %1,%r4,%r5
601         addu.ci %0,%r2,%r3"                                             \
602            : "=r" ((USItype)(sh)),                                      \
603              "=&r" ((USItype)(sl))                                      \
604            : "%rJ" ((USItype)(ah)),                                     \
605              "rJ" ((USItype)(bh)),                                      \
606              "%rJ" ((USItype)(al)),                                     \
607              "rJ" ((USItype)(bl)))
608 #define sub_ddmmss(sh, sl, ah, al, bh, bl) \
609   __asm__ ("subu.co %1,%r4,%r5
610         subu.ci %0,%r2,%r3"                                             \
611            : "=r" ((USItype)(sh)),                                      \
612              "=&r" ((USItype)(sl))                                      \
613            : "rJ" ((USItype)(ah)),                                      \
614              "rJ" ((USItype)(bh)),                                      \
615              "rJ" ((USItype)(al)),                                      \
616              "rJ" ((USItype)(bl)))
617 #define count_leading_zeros(count, x) \
618   do {                                                                  \
619     USItype __cbtmp;                                                    \
620     __asm__ ("ff1 %0,%1"                                                \
621              : "=r" (__cbtmp)                                           \
622              : "r" ((USItype)(x)));                                     \
623     (count) = __cbtmp ^ 31;                                             \
624   } while (0)
625 #define COUNT_LEADING_ZEROS_0 63 /* sic */
626 #if defined (__m88110__)
627 #define umul_ppmm(wh, wl, u, v) \
628   do {                                                                  \
629     union {UDItype __ll;                                                \
630            struct {USItype __h, __l;} __i;                              \
631           } __xx;                                                       \
632     __asm__ ("mulu.d    %0,%1,%2"                                       \
633              : "=r" (__xx.__ll)                                         \
634              : "r" ((USItype)(u)),                                      \
635                "r" ((USItype)(v)));                                     \
636     (wh) = __xx.__i.__h;                                                \
637     (wl) = __xx.__i.__l;                                                \
638   } while (0)
639 #define udiv_qrnnd(q, r, n1, n0, d) \
640   ({union {UDItype __ll;                                                \
641            struct {USItype __h, __l;} __i;                              \
642           } __xx;                                                       \
643   USItype __q;                                                          \
644   __xx.__i.__h = (n1); __xx.__i.__l = (n0);                             \
645   __asm__ ("divu.d %0,%1,%2"                                            \
646            : "=r" (__q)                                                 \
647            : "r" (__xx.__ll),                                           \
648              "r" ((USItype)(d)));                                       \
649   (r) = (n0) - __q * (d); (q) = __q; })
650 #define UMUL_TIME 5
651 #define UDIV_TIME 25
652 #else
653 #define UMUL_TIME 17
654 #define UDIV_TIME 150
655 #endif /* __m88110__ */
656 #endif /* __m88000__ */
657
658 #if defined (__mips__) && W_TYPE_SIZE == 32
659 #if __GNUC__ > 2 || __GNUC_MINOR__ >= 7
660 #define umul_ppmm(w1, w0, u, v) \
661   __asm__ ("multu %2,%3"                                                \
662            : "=l" ((USItype)(w0)),                                      \
663              "=h" ((USItype)(w1))                                       \
664            : "d" ((USItype)(u)),                                        \
665              "d" ((USItype)(v)))
666 #else
667 #define umul_ppmm(w1, w0, u, v) \
668   __asm__ ("multu %2,%3
669         mflo %0
670         mfhi %1"                                                        \
671            : "=d" ((USItype)(w0)),                                      \
672              "=d" ((USItype)(w1))                                       \
673            : "d" ((USItype)(u)),                                        \
674              "d" ((USItype)(v)))
675 #endif
676 #define UMUL_TIME 10
677 #define UDIV_TIME 100
678 #endif /* __mips__ */
679
680 #if (defined (__mips) && __mips >= 3) && W_TYPE_SIZE == 64
681 #if __GNUC__ > 2 || __GNUC_MINOR__ >= 7
682 #define umul_ppmm(w1, w0, u, v) \
683   __asm__ ("dmultu %2,%3"                                               \
684            : "=l" ((UDItype)(w0)),                                      \
685              "=h" ((UDItype)(w1))                                       \
686            : "d" ((UDItype)(u)),                                        \
687              "d" ((UDItype)(v)))
688 #else
689 #define umul_ppmm(w1, w0, u, v) \
690   __asm__ ("dmultu %2,%3
691         mflo %0
692         mfhi %1"                                                        \
693            : "=d" ((UDItype)(w0)),                                      \
694              "=d" ((UDItype)(w1))                                       \
695            : "d" ((UDItype)(u)),                                        \
696              "d" ((UDItype)(v)))
697 #endif
698 #define UMUL_TIME 20
699 #define UDIV_TIME 140
700 #endif /* __mips__ */
701
702 #if defined (__ns32000__) && W_TYPE_SIZE == 32
703 #define umul_ppmm(w1, w0, u, v) \
704   ({union {UDItype __ll;                                                \
705            struct {USItype __l, __h;} __i;                              \
706           } __xx;                                                       \
707   __asm__ ("meid %2,%0"                                                 \
708            : "=g" (__xx.__ll)                                           \
709            : "%0" ((USItype)(u)),                                       \
710              "g" ((USItype)(v)));                                       \
711   (w1) = __xx.__i.__h; (w0) = __xx.__i.__l;})
712 #define __umulsidi3(u, v) \
713   ({UDItype __w;                                                        \
714     __asm__ ("meid %2,%0"                                               \
715              : "=g" (__w)                                               \
716              : "%0" ((USItype)(u)),                                     \
717                "g" ((USItype)(v)));                                     \
718     __w; })
719 #define udiv_qrnnd(q, r, n1, n0, d) \
720   ({union {UDItype __ll;                                                \
721            struct {USItype __l, __h;} __i;                              \
722           } __xx;                                                       \
723   __xx.__i.__h = (n1); __xx.__i.__l = (n0);                             \
724   __asm__ ("deid %2,%0"                                                 \
725            : "=g" (__xx.__ll)                                           \
726            : "0" (__xx.__ll),                                           \
727              "g" ((USItype)(d)));                                       \
728   (r) = __xx.__i.__l; (q) = __xx.__i.__h; })
729 #define count_trailing_zeros(count,x) \
730   do {
731     __asm__ ("ffsd      %2,%0"                                          \
732              : "=r" ((USItype) (count))                                 \
733              : "0" ((USItype) 0),                                       \
734                "r" ((USItype) (x)));                                    \
735   } while (0)
736 #endif /* __ns32000__ */
737
738 #if (defined (_ARCH_PPC) || defined (_IBMR2)) && W_TYPE_SIZE == 32
739 #define add_ssaaaa(sh, sl, ah, al, bh, bl) \
740   do {                                                                  \
741     if (__builtin_constant_p (bh) && (bh) == 0)                         \
742       __asm__ ("{a%I4|add%I4c} %1,%3,%4\n\t{aze|addze} %0,%2"           \
743              : "=r" ((USItype)(sh)),                                    \
744                "=&r" ((USItype)(sl))                                    \
745              : "%r" ((USItype)(ah)),                                    \
746                "%r" ((USItype)(al)),                                    \
747                "rI" ((USItype)(bl)));                                   \
748     else if (__builtin_constant_p (bh) && (bh) ==~(USItype) 0)          \
749       __asm__ ("{a%I4|add%I4c} %1,%3,%4\n\t{ame|addme} %0,%2"           \
750              : "=r" ((USItype)(sh)),                                    \
751                "=&r" ((USItype)(sl))                                    \
752              : "%r" ((USItype)(ah)),                                    \
753                "%r" ((USItype)(al)),                                    \
754                "rI" ((USItype)(bl)));                                   \
755     else                                                                \
756       __asm__ ("{a%I5|add%I5c} %1,%4,%5\n\t{ae|adde} %0,%2,%3"          \
757              : "=r" ((USItype)(sh)),                                    \
758                "=&r" ((USItype)(sl))                                    \
759              : "%r" ((USItype)(ah)),                                    \
760                "r" ((USItype)(bh)),                                     \
761                "%r" ((USItype)(al)),                                    \
762                "rI" ((USItype)(bl)));                                   \
763   } while (0)
764 #define sub_ddmmss(sh, sl, ah, al, bh, bl) \
765   do {                                                                  \
766     if (__builtin_constant_p (ah) && (ah) == 0)                         \
767       __asm__ ("{sf%I3|subf%I3c} %1,%4,%3\n\t{sfze|subfze} %0,%2"       \
768                : "=r" ((USItype)(sh)),                                  \
769                  "=&r" ((USItype)(sl))                                  \
770                : "r" ((USItype)(bh)),                                   \
771                  "rI" ((USItype)(al)),                                  \
772                  "r" ((USItype)(bl)));                                  \
773     else if (__builtin_constant_p (ah) && (ah) ==~(USItype) 0)          \
774       __asm__ ("{sf%I3|subf%I3c} %1,%4,%3\n\t{sfme|subfme} %0,%2"       \
775                : "=r" ((USItype)(sh)),                                  \
776                  "=&r" ((USItype)(sl))                                  \
777                : "r" ((USItype)(bh)),                                   \
778                  "rI" ((USItype)(al)),                                  \
779                  "r" ((USItype)(bl)));                                  \
780     else if (__builtin_constant_p (bh) && (bh) == 0)                    \
781       __asm__ ("{sf%I3|subf%I3c} %1,%4,%3\n\t{ame|addme} %0,%2"         \
782                : "=r" ((USItype)(sh)),                                  \
783                  "=&r" ((USItype)(sl))                                  \
784                : "r" ((USItype)(ah)),                                   \
785                  "rI" ((USItype)(al)),                                  \
786                  "r" ((USItype)(bl)));                                  \
787     else if (__builtin_constant_p (bh) && (bh) ==~(USItype) 0)          \
788       __asm__ ("{sf%I3|subf%I3c} %1,%4,%3\n\t{aze|addze} %0,%2"         \
789                : "=r" ((USItype)(sh)),                                  \
790                  "=&r" ((USItype)(sl))                                  \
791                : "r" ((USItype)(ah)),                                   \
792                  "rI" ((USItype)(al)),                                  \
793                  "r" ((USItype)(bl)));                                  \
794     else                                                                \
795       __asm__ ("{sf%I4|subf%I4c} %1,%5,%4\n\t{sfe|subfe} %0,%3,%2"      \
796                : "=r" ((USItype)(sh)),                                  \
797                  "=&r" ((USItype)(sl))                                  \
798                : "r" ((USItype)(ah)),                                   \
799                  "r" ((USItype)(bh)),                                   \
800                  "rI" ((USItype)(al)),                                  \
801                  "r" ((USItype)(bl)));                                  \
802   } while (0)
803 #define count_leading_zeros(count, x) \
804   __asm__ ("{cntlz|cntlzw} %0,%1"                                       \
805            : "=r" ((USItype)(count))                                    \
806            : "r" ((USItype)(x)))
807 #define COUNT_LEADING_ZEROS_0 32
808 #if defined (_ARCH_PPC)
809 #define umul_ppmm(ph, pl, m0, m1) \
810   do {                                                                  \
811     USItype __m0 = (m0), __m1 = (m1);                                   \
812     __asm__ ("mulhwu %0,%1,%2"                                          \
813              : "=r" ((USItype) ph)                                      \
814              : "%r" (__m0),                                             \
815                "r" (__m1));                                             \
816     (pl) = __m0 * __m1;                                                 \
817   } while (0)
818 #define UMUL_TIME 15
819 #define smul_ppmm(ph, pl, m0, m1) \
820   do {                                                                  \
821     SItype __m0 = (m0), __m1 = (m1);                                    \
822     __asm__ ("mulhw %0,%1,%2"                                           \
823              : "=r" ((SItype) ph)                                       \
824              : "%r" (__m0),                                             \
825                "r" (__m1));                                             \
826     (pl) = __m0 * __m1;                                                 \
827   } while (0)
828 #define SMUL_TIME 14
829 #define UDIV_TIME 120
830 #else
831 #define umul_ppmm(xh, xl, m0, m1) \
832   do {                                                                  \
833     USItype __m0 = (m0), __m1 = (m1);                                   \
834     __asm__ ("mul %0,%2,%3"                                             \
835              : "=r" ((USItype)(xh)),                                    \
836                "=q" ((USItype)(xl))                                     \
837              : "r" (__m0),                                              \
838                "r" (__m1));                                             \
839     (xh) += ((((SItype) __m0 >> 31) & __m1)                             \
840              + (((SItype) __m1 >> 31) & __m0));                         \
841   } while (0)
842 #define UMUL_TIME 8
843 #define smul_ppmm(xh, xl, m0, m1) \
844   __asm__ ("mul %0,%2,%3"                                               \
845            : "=r" ((SItype)(xh)),                                       \
846              "=q" ((SItype)(xl))                                        \
847            : "r" (m0),                                                  \
848              "r" (m1))
849 #define SMUL_TIME 4
850 #define sdiv_qrnnd(q, r, nh, nl, d) \
851   __asm__ ("div %0,%2,%4"                                               \
852            : "=r" ((SItype)(q)), "=q" ((SItype)(r))                     \
853            : "r" ((SItype)(nh)), "1" ((SItype)(nl)), "r" ((SItype)(d)))
854 #define UDIV_TIME 100
855 #endif
856 #endif /* Power architecture variants.  */
857
858 #if defined (__pyr__) && W_TYPE_SIZE == 32
859 #define add_ssaaaa(sh, sl, ah, al, bh, bl) \
860   __asm__ ("addw        %5,%1
861         addwc   %3,%0"                                                  \
862            : "=r" ((USItype)(sh)),                                      \
863              "=&r" ((USItype)(sl))                                      \
864            : "%0" ((USItype)(ah)),                                      \
865              "g" ((USItype)(bh)),                                       \
866              "%1" ((USItype)(al)),                                      \
867              "g" ((USItype)(bl)))
868 #define sub_ddmmss(sh, sl, ah, al, bh, bl) \
869   __asm__ ("subw        %5,%1
870         subwb   %3,%0"                                                  \
871            : "=r" ((USItype)(sh)),                                      \
872              "=&r" ((USItype)(sl))                                      \
873            : "0" ((USItype)(ah)),                                       \
874              "g" ((USItype)(bh)),                                       \
875              "1" ((USItype)(al)),                                       \
876              "g" ((USItype)(bl)))
877 /* This insn works on Pyramids with AP, XP, or MI CPUs, but not with SP.  */
878 #define umul_ppmm(w1, w0, u, v) \
879   ({union {UDItype __ll;                                                \
880            struct {USItype __h, __l;} __i;                              \
881           } __xx;                                                       \
882   __asm__ ("movw %1,%R0
883         uemul %2,%0"                                                    \
884            : "=&r" (__xx.__ll)                                          \
885            : "g" ((USItype) (u)),                                       \
886              "g" ((USItype)(v)));                                       \
887   (w1) = __xx.__i.__h; (w0) = __xx.__i.__l;})
888 #endif /* __pyr__ */
889
890 #if defined (__ibm032__) /* RT/ROMP */  && W_TYPE_SIZE == 32
891 #define add_ssaaaa(sh, sl, ah, al, bh, bl) \
892   __asm__ ("a %1,%5
893         ae %0,%3"                                                       \
894            : "=r" ((USItype)(sh)),                                      \
895              "=&r" ((USItype)(sl))                                      \
896            : "%0" ((USItype)(ah)),                                      \
897              "r" ((USItype)(bh)),                                       \
898              "%1" ((USItype)(al)),                                      \
899              "r" ((USItype)(bl)))
900 #define sub_ddmmss(sh, sl, ah, al, bh, bl) \
901   __asm__ ("s %1,%5
902         se %0,%3"                                                       \
903            : "=r" ((USItype)(sh)),                                      \
904              "=&r" ((USItype)(sl))                                      \
905            : "0" ((USItype)(ah)),                                       \
906              "r" ((USItype)(bh)),                                       \
907              "1" ((USItype)(al)),                                       \
908              "r" ((USItype)(bl)))
909 #define umul_ppmm(ph, pl, m0, m1) \
910   do {                                                                  \
911     USItype __m0 = (m0), __m1 = (m1);                                   \
912     __asm__ (                                                           \
913        "s       r2,r2
914         mts     r10,%2
915         m       r2,%3
916         m       r2,%3
917         m       r2,%3
918         m       r2,%3
919         m       r2,%3
920         m       r2,%3
921         m       r2,%3
922         m       r2,%3
923         m       r2,%3
924         m       r2,%3
925         m       r2,%3
926         m       r2,%3
927         m       r2,%3
928         m       r2,%3
929         m       r2,%3
930         m       r2,%3
931         cas     %0,r2,r0
932         mfs     r10,%1"                                                 \
933              : "=r" ((USItype)(ph)),                                    \
934                "=r" ((USItype)(pl))                                     \
935              : "%r" (__m0),                                             \
936                 "r" (__m1)                                              \
937              : "r2");                                                   \
938     (ph) += ((((SItype) __m0 >> 31) & __m1)                             \
939              + (((SItype) __m1 >> 31) & __m0));                         \
940   } while (0)
941 #define UMUL_TIME 20
942 #define UDIV_TIME 200
943 #define count_leading_zeros(count, x) \
944   do {                                                                  \
945     if ((x) >= 0x10000)                                                 \
946       __asm__ ("clz     %0,%1"                                          \
947                : "=r" ((USItype)(count))                                \
948                : "r" ((USItype)(x) >> 16));                             \
949     else                                                                \
950       {                                                                 \
951         __asm__ ("clz   %0,%1"                                          \
952                  : "=r" ((USItype)(count))                              \
953                  : "r" ((USItype)(x)));                                 \
954         (count) += 16;                                                  \
955       }                                                                 \
956   } while (0)
957 #endif /* RT/ROMP */
958
959 #if defined (__sh2__) && W_TYPE_SIZE == 32
960 #define umul_ppmm(w1, w0, u, v) \
961   __asm__ (                                                             \
962        "dmulu.l %2,%3
963         sts     macl,%1
964         sts     mach,%0"                                                \
965            : "=r" ((USItype)(w1)),                                      \
966              "=r" ((USItype)(w0))                                       \
967            : "r" ((USItype)(u)),                                        \
968              "r" ((USItype)(v))                                         \
969            : "macl", "mach")
970 #define UMUL_TIME 5
971 #endif
972
973 #if defined (__sparc__) && W_TYPE_SIZE == 32
974 #define add_ssaaaa(sh, sl, ah, al, bh, bl) \
975   __asm__ ("addcc %r4,%5,%1
976         addx %r2,%3,%0"                                                 \
977            : "=r" ((USItype)(sh)),                                      \
978              "=&r" ((USItype)(sl))                                      \
979            : "%rJ" ((USItype)(ah)),                                     \
980              "rI" ((USItype)(bh)),                                      \
981              "%rJ" ((USItype)(al)),                                     \
982              "rI" ((USItype)(bl))                                       \
983            __CLOBBER_CC)
984 #define sub_ddmmss(sh, sl, ah, al, bh, bl) \
985   __asm__ ("subcc %r4,%5,%1
986         subx %r2,%3,%0"                                                 \
987            : "=r" ((USItype)(sh)),                                      \
988              "=&r" ((USItype)(sl))                                      \
989            : "rJ" ((USItype)(ah)),                                      \
990              "rI" ((USItype)(bh)),                                      \
991              "rJ" ((USItype)(al)),                                      \
992              "rI" ((USItype)(bl))                                       \
993            __CLOBBER_CC)
994 #if defined (__sparc_v8__)
995 /* Don't match immediate range because, 1) it is not often useful,
996    2) the 'I' flag thinks of the range as a 13 bit signed interval,
997    while we want to match a 13 bit interval, sign extended to 32 bits,
998    but INTERPRETED AS UNSIGNED.  */
999 #define umul_ppmm(w1, w0, u, v) \
1000   __asm__ ("umul %2,%3,%1;rd %%y,%0"                                    \
1001            : "=r" ((USItype)(w1)),                                      \
1002              "=r" ((USItype)(w0))                                       \
1003            : "r" ((USItype)(u)),                                        \
1004              "r" ((USItype)(v)))
1005 #define UMUL_TIME 5
1006 #ifndef SUPERSPARC      /* SuperSPARC's udiv only handles 53 bit dividends */
1007 #define udiv_qrnnd(q, r, n1, n0, d) \
1008   do {                                                                  \
1009     USItype __q;                                                        \
1010     __asm__ ("mov %1,%%y;nop;nop;nop;udiv %2,%3,%0"                     \
1011              : "=r" ((USItype)(__q))                                    \
1012              : "r" ((USItype)(n1)),                                     \
1013                "r" ((USItype)(n0)),                                     \
1014                "r" ((USItype)(d)));                                     \
1015     (r) = (n0) - __q * (d);                                             \
1016     (q) = __q;                                                          \
1017   } while (0)
1018 #define UDIV_TIME 25
1019 #endif /* SUPERSPARC */
1020 #else /* ! __sparc_v8__ */
1021 #if defined (__sparclite__)
1022 /* This has hardware multiply but not divide.  It also has two additional
1023    instructions scan (ffs from high bit) and divscc.  */
1024 #define umul_ppmm(w1, w0, u, v) \
1025   __asm__ ("umul %2,%3,%1;rd %%y,%0"                                    \
1026            : "=r" ((USItype)(w1)),                                      \
1027              "=r" ((USItype)(w0))                                       \
1028            : "r" ((USItype)(u)),                                        \
1029              "r" ((USItype)(v)))
1030 #define UMUL_TIME 5
1031 #define udiv_qrnnd(q, r, n1, n0, d) \
1032   __asm__ ("! Inlined udiv_qrnnd
1033         wr      %%g0,%2,%%y     ! Not a delayed write for sparclite
1034         tst     %%g0
1035         divscc  %3,%4,%%g1
1036         divscc  %%g1,%4,%%g1
1037         divscc  %%g1,%4,%%g1
1038         divscc  %%g1,%4,%%g1
1039         divscc  %%g1,%4,%%g1
1040         divscc  %%g1,%4,%%g1
1041         divscc  %%g1,%4,%%g1
1042         divscc  %%g1,%4,%%g1
1043         divscc  %%g1,%4,%%g1
1044         divscc  %%g1,%4,%%g1
1045         divscc  %%g1,%4,%%g1
1046         divscc  %%g1,%4,%%g1
1047         divscc  %%g1,%4,%%g1
1048         divscc  %%g1,%4,%%g1
1049         divscc  %%g1,%4,%%g1
1050         divscc  %%g1,%4,%%g1
1051         divscc  %%g1,%4,%%g1
1052         divscc  %%g1,%4,%%g1
1053         divscc  %%g1,%4,%%g1
1054         divscc  %%g1,%4,%%g1
1055         divscc  %%g1,%4,%%g1
1056         divscc  %%g1,%4,%%g1
1057         divscc  %%g1,%4,%%g1
1058         divscc  %%g1,%4,%%g1
1059         divscc  %%g1,%4,%%g1
1060         divscc  %%g1,%4,%%g1
1061         divscc  %%g1,%4,%%g1
1062         divscc  %%g1,%4,%%g1
1063         divscc  %%g1,%4,%%g1
1064         divscc  %%g1,%4,%%g1
1065         divscc  %%g1,%4,%%g1
1066         divscc  %%g1,%4,%0
1067         rd      %%y,%1
1068         bl,a 1f
1069         add     %1,%4,%1
1070 1:      ! End of inline udiv_qrnnd"                                     \
1071            : "=r" ((USItype)(q)),                                       \
1072              "=r" ((USItype)(r))                                        \
1073            : "r" ((USItype)(n1)),                                       \
1074              "r" ((USItype)(n0)),                                       \
1075              "rI" ((USItype)(d))                                        \
1076            : "%g1" __AND_CLOBBER_CC)
1077 #define UDIV_TIME 37
1078 #define count_leading_zeros(count, x) \
1079   __asm__ ("scan %1,0,%0"                                               \
1080            : "=r" ((USItype)(x))                                        \
1081            : "r" ((USItype)(count)))
1082 /* Early sparclites return 63 for an argument of 0, but they warn that future
1083    implementations might change this.  Therefore, leave COUNT_LEADING_ZEROS_0
1084    undefined.  */
1085 #endif /* __sparclite__ */
1086 #endif /* __sparc_v8__ */
1087 /* Default to sparc v7 versions of umul_ppmm and udiv_qrnnd.  */
1088 #ifndef umul_ppmm
1089 #define umul_ppmm(w1, w0, u, v) \
1090   __asm__ ("! Inlined umul_ppmm
1091         wr      %%g0,%2,%%y     ! SPARC has 0-3 delay insn after a wr
1092         sra     %3,31,%%g2      ! Don't move this insn
1093         and     %2,%%g2,%%g2    ! Don't move this insn
1094         andcc   %%g0,0,%%g1     ! Don't move this insn
1095         mulscc  %%g1,%3,%%g1
1096         mulscc  %%g1,%3,%%g1
1097         mulscc  %%g1,%3,%%g1
1098         mulscc  %%g1,%3,%%g1
1099         mulscc  %%g1,%3,%%g1
1100         mulscc  %%g1,%3,%%g1
1101         mulscc  %%g1,%3,%%g1
1102         mulscc  %%g1,%3,%%g1
1103         mulscc  %%g1,%3,%%g1
1104         mulscc  %%g1,%3,%%g1
1105         mulscc  %%g1,%3,%%g1
1106         mulscc  %%g1,%3,%%g1
1107         mulscc  %%g1,%3,%%g1
1108         mulscc  %%g1,%3,%%g1
1109         mulscc  %%g1,%3,%%g1
1110         mulscc  %%g1,%3,%%g1
1111         mulscc  %%g1,%3,%%g1
1112         mulscc  %%g1,%3,%%g1
1113         mulscc  %%g1,%3,%%g1
1114         mulscc  %%g1,%3,%%g1
1115         mulscc  %%g1,%3,%%g1
1116         mulscc  %%g1,%3,%%g1
1117         mulscc  %%g1,%3,%%g1
1118         mulscc  %%g1,%3,%%g1
1119         mulscc  %%g1,%3,%%g1
1120         mulscc  %%g1,%3,%%g1
1121         mulscc  %%g1,%3,%%g1
1122         mulscc  %%g1,%3,%%g1
1123         mulscc  %%g1,%3,%%g1
1124         mulscc  %%g1,%3,%%g1
1125         mulscc  %%g1,%3,%%g1
1126         mulscc  %%g1,%3,%%g1
1127         mulscc  %%g1,0,%%g1
1128         add     %%g1,%%g2,%0
1129         rd      %%y,%1"                                                 \
1130            : "=r" ((USItype)(w1)),                                      \
1131              "=r" ((USItype)(w0))                                       \
1132            : "%rI" ((USItype)(u)),                                      \
1133              "r" ((USItype)(v))                                         \
1134            : "%g1", "%g2" __AND_CLOBBER_CC)
1135 #define UMUL_TIME 39            /* 39 instructions */
1136 #endif
1137 #ifndef udiv_qrnnd
1138 /* It's quite necessary to add this much assembler for the sparc.
1139    The default udiv_qrnnd (in C) is more than 10 times slower!  */
1140 #define udiv_qrnnd(q, r, n1, n0, d) \
1141   __asm__ ("! Inlined udiv_qrnnd
1142         mov     32,%%g1
1143         subcc   %1,%2,%%g0
1144 1:      bcs     5f
1145          addxcc %0,%0,%0        ! shift n1n0 and a q-bit in lsb
1146         sub     %1,%2,%1        ! this kills msb of n
1147         addx    %1,%1,%1        ! so this can't give carry
1148         subcc   %%g1,1,%%g1
1149 2:      bne     1b
1150          subcc  %1,%2,%%g0
1151         bcs     3f
1152          addxcc %0,%0,%0        ! shift n1n0 and a q-bit in lsb
1153         b       3f
1154          sub    %1,%2,%1        ! this kills msb of n
1155 4:      sub     %1,%2,%1
1156 5:      addxcc  %1,%1,%1
1157         bcc     2b
1158          subcc  %%g1,1,%%g1
1159 ! Got carry from n.  Subtract next step to cancel this carry.
1160         bne     4b
1161          addcc  %0,%0,%0        ! shift n1n0 and a 0-bit in lsb
1162         sub     %1,%2,%1
1163 3:      xnor    %0,0,%0
1164         ! End of inline udiv_qrnnd"                                     \
1165            : "=&r" ((USItype)(q)),                                      \
1166              "=&r" ((USItype)(r))                                       \
1167            : "r" ((USItype)(d)),                                        \
1168              "1" ((USItype)(n1)),                                       \
1169              "0" ((USItype)(n0)) : "%g1" __AND_CLOBBER_CC)
1170 #define UDIV_TIME (3+7*32)      /* 7 instructions/iteration. 32 iterations. */
1171 #else
1172 extern USItype __udiv_qrnnd __P ((USItype *, USItype, USItype, USItype));
1173 #define UDIV_TIME 140
1174 #endif /* udiv_qrnnd */
1175 #endif /* __sparc__ */
1176
1177 #if (defined (__sparc_v9__) || (defined (__sparc__) && defined (__arch64__)) \
1178     || defined (__sparcv9)) && W_TYPE_SIZE == 64
1179 #define add_ssaaaa(sh, sl, ah, al, bh, bl)                              \
1180   __asm__ ("addcc %4,%5,%1
1181             add %2,%3,%0
1182             bcs,a,pn %%xcc, 1f
1183             add %0, 1, %0
1184             1:"                                                         \
1185            : "=r" ((UDItype)(sh)),                                      \
1186              "=&r" ((UDItype)(sl))                                      \
1187            : "r" ((UDItype)(ah)),                                       \
1188              "r" ((UDItype)(bh)),                                       \
1189              "r" ((UDItype)(al)),                                       \
1190              "r" ((UDItype)(bl))                                        \
1191            : "cc")
1192
1193 #define sub_ddmmss(sh, sl, ah, al, bh, bl)                              \
1194   __asm__ ("subcc %4,%5,%1
1195             sub %2,%3,%0
1196             bcs,a,pn %%xcc, 1f
1197             sub %0, 1, %0
1198             1:"                                                         \
1199            : "=r" ((UDItype)(sh)),                                      \
1200              "=&r" ((UDItype)(sl))                                      \
1201            : "r" ((UDItype)(ah)),                                       \
1202              "r" ((UDItype)(bh)),                                       \
1203              "r" ((UDItype)(al)),                                       \
1204              "r" ((UDItype)(bl))                                        \
1205            : "cc")
1206
1207 #define umul_ppmm(wh, wl, u, v)                                         \
1208   do {                                                                  \
1209           UDItype tmp1, tmp2, tmp3, tmp4;                               \
1210           __asm__ __volatile__ (                                        \
1211                    "srl %7,0,%3
1212                     mulx %3,%6,%1
1213                     srlx %6,32,%2
1214                     mulx %2,%3,%4
1215                     sllx %4,32,%5
1216                     srl %6,0,%3
1217                     sub %1,%5,%5
1218                     srlx %5,32,%5
1219                     addcc %4,%5,%4
1220                     srlx %7,32,%5
1221                     mulx %3,%5,%3
1222                     mulx %2,%5,%5
1223                     sethi 0x80000000,%2
1224                     addcc %4,%3,%4
1225                     srlx %4,32,%4
1226                     add %2,%2,%2
1227                     movcc %%xcc,%%g0,%2
1228                     addcc %5,%4,%5
1229                     sllx %3,32,%3
1230                     add %1,%3,%1
1231                     add %5,%2,%0"                                       \
1232            : "=r" ((UDItype)(wh)),                                      \
1233              "=&r" ((UDItype)(wl)),                                     \
1234              "=&r" (tmp1), "=&r" (tmp2), "=&r" (tmp3), "=&r" (tmp4)     \
1235            : "r" ((UDItype)(u)),                                        \
1236              "r" ((UDItype)(v))                                         \
1237            : "cc");                                                     \
1238   } while (0)
1239 #define UMUL_TIME 96
1240 #define UDIV_TIME 230
1241 #endif /* __sparc_v9__ */
1242
1243 #if defined (__vax__) && W_TYPE_SIZE == 32
1244 #define add_ssaaaa(sh, sl, ah, al, bh, bl) \
1245   __asm__ ("addl2 %5,%1
1246         adwc %3,%0"                                                     \
1247            : "=g" ((USItype)(sh)),                                      \
1248              "=&g" ((USItype)(sl))                                      \
1249            : "%0" ((USItype)(ah)),                                      \
1250              "g" ((USItype)(bh)),                                       \
1251              "%1" ((USItype)(al)),                                      \
1252              "g" ((USItype)(bl)))
1253 #define sub_ddmmss(sh, sl, ah, al, bh, bl) \
1254   __asm__ ("subl2 %5,%1
1255         sbwc %3,%0"                                                     \
1256            : "=g" ((USItype)(sh)),                                      \
1257              "=&g" ((USItype)(sl))                                      \
1258            : "0" ((USItype)(ah)),                                       \
1259              "g" ((USItype)(bh)),                                       \
1260              "1" ((USItype)(al)),                                       \
1261              "g" ((USItype)(bl)))
1262 #define umul_ppmm(xh, xl, m0, m1) \
1263   do {                                                                  \
1264     union {UDItype __ll;                                                \
1265            struct {USItype __l, __h;} __i;                              \
1266           } __xx;                                                       \
1267     USItype __m0 = (m0), __m1 = (m1);                                   \
1268     __asm__ ("emul %1,%2,$0,%0"                                         \
1269              : "=g" (__xx.__ll)                                         \
1270              : "g" (__m0),                                              \
1271                "g" (__m1));                                             \
1272     (xh) = __xx.__i.__h; (xl) = __xx.__i.__l;                           \
1273     (xh) += ((((SItype) __m0 >> 31) & __m1)                             \
1274              + (((SItype) __m1 >> 31) & __m0));                         \
1275   } while (0)
1276 #define sdiv_qrnnd(q, r, n1, n0, d) \
1277   do {                                                                  \
1278     union {DItype __ll;                                                 \
1279            struct {SItype __l, __h;} __i;                               \
1280           } __xx;                                                       \
1281     __xx.__i.__h = n1; __xx.__i.__l = n0;                               \
1282     __asm__ ("ediv %3,%2,%0,%1"                                         \
1283              : "=g" (q), "=g" (r)                                       \
1284              : "g" (__xx.ll), "g" (d));                                 \
1285   } while (0)
1286 #endif /* __vax__ */
1287
1288 #if defined (__z8000__) && W_TYPE_SIZE == 16
1289 #define add_ssaaaa(sh, sl, ah, al, bh, bl) \
1290   __asm__ ("add %H1,%H5\n\tadc  %H0,%H3"                                \
1291            : "=r" ((unsigned int)(sh)),                                 \
1292              "=&r" ((unsigned int)(sl))                                 \
1293            : "%0" ((unsigned int)(ah)),                                 \
1294              "r" ((unsigned int)(bh)),                                  \
1295              "%1" ((unsigned int)(al)),                                 \
1296              "rQR" ((unsigned int)(bl)))
1297 #define sub_ddmmss(sh, sl, ah, al, bh, bl) \
1298   __asm__ ("sub %H1,%H5\n\tsbc  %H0,%H3"                                \
1299            : "=r" ((unsigned int)(sh)),                                 \
1300              "=&r" ((unsigned int)(sl))                                 \
1301            : "0" ((unsigned int)(ah)),                                  \
1302              "r" ((unsigned int)(bh)),                                  \
1303              "1" ((unsigned int)(al)),                                  \
1304              "rQR" ((unsigned int)(bl)))
1305 #define umul_ppmm(xh, xl, m0, m1) \
1306   do {                                                                  \
1307     union {long int __ll;                                               \
1308            struct {unsigned int __h, __l;} __i;                         \
1309           } __xx;                                                       \
1310     unsigned int __m0 = (m0), __m1 = (m1);                              \
1311     __asm__ ("mult      %S0,%H3"                                        \
1312              : "=r" (__xx.__i.__h),                                     \
1313                "=r" (__xx.__i.__l)                                      \
1314              : "%1" (__m0),                                             \
1315                "rQR" (__m1));                                           \
1316     (xh) = __xx.__i.__h; (xl) = __xx.__i.__l;                           \
1317     (xh) += ((((signed int) __m0 >> 15) & __m1)                         \
1318              + (((signed int) __m1 >> 15) & __m0));                     \
1319   } while (0)
1320 #endif /* __z8000__ */
1321
1322 #endif /* __GNUC__ */
1323
1324
1325 #if !defined (umul_ppmm) && defined (__umulsidi3)
1326 #define umul_ppmm(ph, pl, m0, m1) \
1327   {                                                                     \
1328     UDWtype __ll = __umulsidi3 (m0, m1);                                \
1329     ph = (UWtype) (__ll >> W_TYPE_SIZE);                                \
1330     pl = (UWtype) __ll;                                                 \
1331   }
1332 #endif
1333
1334 #if !defined (__umulsidi3)
1335 #define __umulsidi3(u, v) \
1336   ({UWtype __hi, __lo;                                                  \
1337     umul_ppmm (__hi, __lo, u, v);                                       \
1338     ((UDWtype) __hi << W_TYPE_SIZE) | __lo; })
1339 #endif
1340
1341 /* If this machine has no inline assembler, use C macros.  */
1342
1343 #if !defined (add_ssaaaa)
1344 #define add_ssaaaa(sh, sl, ah, al, bh, bl) \
1345   do {                                                                  \
1346     UWtype __x;                                                         \
1347     __x = (al) + (bl);                                                  \
1348     (sh) = (ah) + (bh) + (__x < (al));                                  \
1349     (sl) = __x;                                                         \
1350   } while (0)
1351 #endif
1352
1353 #if !defined (sub_ddmmss)
1354 #define sub_ddmmss(sh, sl, ah, al, bh, bl) \
1355   do {                                                                  \
1356     UWtype __x;                                                         \
1357     __x = (al) - (bl);                                                  \
1358     (sh) = (ah) - (bh) - (__x > (al));                                  \
1359     (sl) = __x;                                                         \
1360   } while (0)
1361 #endif
1362
1363 #if !defined (umul_ppmm)
1364 #define umul_ppmm(w1, w0, u, v)                                         \
1365   do {                                                                  \
1366     UWtype __x0, __x1, __x2, __x3;                                      \
1367     UHWtype __ul, __vl, __uh, __vh;                                     \
1368     UWtype __u = (u), __v = (v);                                        \
1369                                                                         \
1370     __ul = __ll_lowpart (__u);                                          \
1371     __uh = __ll_highpart (__u);                                         \
1372     __vl = __ll_lowpart (__v);                                          \
1373     __vh = __ll_highpart (__v);                                         \
1374                                                                         \
1375     __x0 = (UWtype) __ul * __vl;                                        \
1376     __x1 = (UWtype) __ul * __vh;                                        \
1377     __x2 = (UWtype) __uh * __vl;                                        \
1378     __x3 = (UWtype) __uh * __vh;                                        \
1379                                                                         \
1380     __x1 += __ll_highpart (__x0);/* this can't give carry */            \
1381     __x1 += __x2;               /* but this indeed can */               \
1382     if (__x1 < __x2)            /* did we get it? */                    \
1383       __x3 += __ll_B;           /* yes, add it in the proper pos. */    \
1384                                                                         \
1385     (w1) = __x3 + __ll_highpart (__x1);                                 \
1386     (w0) = (__ll_lowpart (__x1) << W_TYPE_SIZE/2) + __ll_lowpart (__x0);\
1387   } while (0)
1388 #endif
1389
1390 #if !defined (umul_ppmm)
1391 #define smul_ppmm(w1, w0, u, v)                                         \
1392   do {                                                                  \
1393     UWtype __w1;                                                        \
1394     UWtype __m0 = (u), __m1 = (v);                                      \
1395     umul_ppmm (__w1, w0, __m0, __m1);                                   \
1396     (w1) = __w1 - (-(__m0 >> (W_TYPE_SIZE - 1)) & __m1)                 \
1397                 - (-(__m1 >> (W_TYPE_SIZE - 1)) & __m0);                \
1398   } while (0)
1399 #endif
1400
1401 /* Define this unconditionally, so it can be used for debugging.  */
1402 #define __udiv_qrnnd_c(q, r, n1, n0, d) \
1403   do {                                                                  \
1404     UWtype __d1, __d0, __q1, __q0, __r1, __r0, __m;                     \
1405     __d1 = __ll_highpart (d);                                           \
1406     __d0 = __ll_lowpart (d);                                            \
1407                                                                         \
1408     __r1 = (n1) % __d1;                                                 \
1409     __q1 = (n1) / __d1;                                                 \
1410     __m = (UWtype) __q1 * __d0;                                         \
1411     __r1 = __r1 * __ll_B | __ll_highpart (n0);                          \
1412     if (__r1 < __m)                                                     \
1413       {                                                                 \
1414         __q1--, __r1 += (d);                                            \
1415         if (__r1 >= (d)) /* i.e. we didn't get carry when adding to __r1 */\
1416           if (__r1 < __m)                                               \
1417             __q1--, __r1 += (d);                                        \
1418       }                                                                 \
1419     __r1 -= __m;                                                        \
1420                                                                         \
1421     __r0 = __r1 % __d1;                                                 \
1422     __q0 = __r1 / __d1;                                                 \
1423     __m = (UWtype) __q0 * __d0;                                         \
1424     __r0 = __r0 * __ll_B | __ll_lowpart (n0);                           \
1425     if (__r0 < __m)                                                     \
1426       {                                                                 \
1427         __q0--, __r0 += (d);                                            \
1428         if (__r0 >= (d))                                                \
1429           if (__r0 < __m)                                               \
1430             __q0--, __r0 += (d);                                        \
1431       }                                                                 \
1432     __r0 -= __m;                                                        \
1433                                                                         \
1434     (q) = (UWtype) __q1 * __ll_B | __q0;                                \
1435     (r) = __r0;                                                         \
1436   } while (0)
1437
1438 /* If the processor has no udiv_qrnnd but sdiv_qrnnd, go through
1439    __udiv_w_sdiv (defined in libgcc or elsewhere).  */
1440 #if !defined (udiv_qrnnd) && defined (sdiv_qrnnd)
1441 #define udiv_qrnnd(q, r, nh, nl, d) \
1442   do {                                                                  \
1443     UWtype __r;                                                         \
1444     (q) = __MPN(udiv_w_sdiv) (&__r, nh, nl, d);                         \
1445     (r) = __r;                                                          \
1446   } while (0)
1447 #endif
1448
1449 /* If udiv_qrnnd was not defined for this processor, use __udiv_qrnnd_c.  */
1450 #if !defined (udiv_qrnnd)
1451 #define UDIV_NEEDS_NORMALIZATION 1
1452 #define udiv_qrnnd __udiv_qrnnd_c
1453 #endif
1454
1455 #if !defined (count_leading_zeros)
1456 extern
1457 #ifdef __STDC__
1458 const
1459 #endif
1460 unsigned char __clz_tab[];
1461 #define count_leading_zeros(count, x) \
1462   do {                                                                  \
1463     UWtype __xr = (x);                                                  \
1464     UWtype __a;                                                         \
1465                                                                         \
1466     if (W_TYPE_SIZE <= 32)                                              \
1467       {                                                                 \
1468         __a = __xr < ((UWtype) 1 << 2*__BITS4)                          \
1469           ? (__xr < ((UWtype) 1 << __BITS4) ? 0 : __BITS4)              \
1470           : (__xr < ((UWtype) 1 << 3*__BITS4) ?  2*__BITS4 : 3*__BITS4);\
1471       }                                                                 \
1472     else                                                                \
1473       {                                                                 \
1474         for (__a = W_TYPE_SIZE - 8; __a > 0; __a -= 8)                  \
1475           if (((__xr >> __a) & 0xff) != 0)                              \
1476             break;                                                      \
1477       }                                                                 \
1478                                                                         \
1479     (count) = W_TYPE_SIZE - (__clz_tab[__xr >> __a] + __a);             \
1480   } while (0)
1481 /* This version gives a well-defined value for zero. */
1482 #define COUNT_LEADING_ZEROS_0 W_TYPE_SIZE
1483 #endif
1484
1485 #if !defined (count_trailing_zeros)
1486 /* Define count_trailing_zeros using count_leading_zeros.  The latter might be
1487    defined in asm, but if it is not, the C version above is good enough.  */
1488 #define count_trailing_zeros(count, x) \
1489   do {                                                                  \
1490     UWtype __ctz_x = (x);                                               \
1491     UWtype __ctz_c;                                                     \
1492     count_leading_zeros (__ctz_c, __ctz_x & -__ctz_x);                  \
1493     (count) = W_TYPE_SIZE - 1 - __ctz_c;                                \
1494   } while (0)
1495 #endif
1496
1497 #ifndef UDIV_NEEDS_NORMALIZATION
1498 #define UDIV_NEEDS_NORMALIZATION 0
1499 #endif