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Use x constraints for operands to vfmaddss and vfmaddsd

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While these instructions accept memory operands, only one operand
may be a memory operand.  Giving two operands xm constraints gives
the compiler the option of using memory for both operands, which
would result in invalid assembly code.  Using x for all operands is
more appropriate, as most x86_64 calling conventions will pass the
arguments in registers anyway.

2013-05-15  Peter Collingbourne  <pcc@google.com>

	* sysdeps/x86_64/fpu/multiarch/s_fma.c (__fma_fma4): Replace xm
	constraints with x constraints.
	* sysdeps/x86_64/fpu/multiarch/s_fmaf.c (__fmaf_fma4): Likewise.
This commit is contained in:
Peter Collingbourne 2013-05-15 20:31:53 +02:00 committed by Andreas Jaeger
parent 39b1f6172a
commit 791f3ba0db
3 changed files with 6 additions and 2 deletions
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4
ChangeLog
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@ -1,5 +1,9 @@
2013-05-15 Peter Collingbourne <pcc@google.com>
* sysdeps/x86_64/fpu/multiarch/s_fma.c (__fma_fma4): Replace xm
constraints with x constraints.
* sysdeps/x86_64/fpu/multiarch/s_fmaf.c (__fmaf_fma4): Likewise.
* malloc/obstack.c (_obstack_compat): Add initializer.
2013-05-15 Edjunior Machado <emachado@linux.vnet.ibm.com>

2
sysdeps/x86_64/fpu/multiarch/s_fma.c
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@ -38,7 +38,7 @@ __fma_fma3 (double x, double y, double z)
static double
__fma_fma4 (double x, double y, double z)
{
asm ("vfmaddsd %3, %2, %1, %0" : "=x" (x) : "x" (x), "xm" (y), "xm" (z));
asm ("vfmaddsd %3, %2, %1, %0" : "=x" (x) : "x" (x), "x" (y), "x" (z));
return x;
}
# else

2
sysdeps/x86_64/fpu/multiarch/s_fmaf.c
View File

@ -37,7 +37,7 @@ __fmaf_fma3 (float x, float y, float z)
static float
__fmaf_fma4 (float x, float y, float z)
{
asm ("vfmaddss %3, %2, %1, %0" : "=x" (x) : "x" (x), "xm" (y), "xm" (z));
asm ("vfmaddss %3, %2, %1, %0" : "=x" (x) : "x" (x), "x" (y), "x" (z));
return x;
}
# else