Initialize fpsr from _FPU_STATUS.

[OLD_BINUTILS]: Fall back to standard fpsr value if _FPU_STATUS
is not defined.

diff --git a/sysdeps/ia64/elf/start.S b/sysdeps/ia64/elf/start.S
index 27a7a1d..a3c8969 100644 (file)
--- a/sysdeps/ia64/elf/start.S
+++ b/sysdeps/ia64/elf/start.S
@@ -20,18 +20,22 @@
 #include <sysdep.h>
 
 #include <asm/unistd.h>
 #include <sysdep.h>
 
 #include <asm/unistd.h>

-#include <asm/fpu.h>

 
 

-/*
- * Arguments for __libc_start_main:
- *     out0:   main
- *     out1:   argc
- *     out2:   argv
- *     out3:   init
- *     out4:   fini
- *     out5:   rtld_fini
- *     out6:   stack_end
- */
+/* Arguments for __libc_start_main:
+       out0:   main
+       out1:   argc
+       out2:   argv
+       out3:   init
+       out4:   fini
+       out5:   rtld_fini
+       out6:   stack_end  */
+
+/* XXX: Remove this once a version of the linker scripts (binutils) is
+   widespread enough that provides the default _FPU_STATUS value.  It
+   is safe to remove the OLD_BINUTILS code at any time since, in the
+   worst case, it will lead to an unresolved external reference to
+   _FPU_STATUS; that is, there won't be any silent errors. */
+#define OLD_BINUTILS

 
        .align 32
        .global _start
 
        .align 32
        .global _start


@@ -41,7 +45,7 @@ _start:
        .prologue
        { .mlx
          alloc r2 = ar.pfs,0,0,7,0
        .prologue
        { .mlx
          alloc r2 = ar.pfs,0,0,7,0

-         movl r3 = FPSR_DEFAULT
+         movl r3 = _FPU_STATUS

        }
        { .mlx
          adds out2 = 16, sp    /* get address of argc value */
        }
        { .mlx
          adds out2 = 16, sp    /* get address of argc value */


@@ -54,6 +58,13 @@ _start:
          mov r9 = ip
          ;;
        }
          mov r9 = ip
          ;;
        }

+#ifdef OLD_BINUTILS
+       .weak _FPU_STATUS
+       cmp.eq p6, p0 = r0, r3
+       ;;
+(p6)   movl r3 = 0x9804c0270033f
+       ;;
+#endif

        { .mii
          mov ar.fpsr = r3
          sub gp = r9, gp       /* back-compute gp value */
        { .mii
          mov ar.fpsr = r3
          sub gp = r9, gp       /* back-compute gp value */