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i386: Set ix86_fpmath to FPMATH_387 without SSE

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ix86_fpmath should be set to combination of FPMATH_387 and FPMATH_SSE.
When SSE is disabled, it should be set to FPMATH_387 and 387 codegen is
also controlled by -msoft-float.

gcc/

	PR target/89397
	* config/i386/i386.c (ix86_option_override_internal): Set
	opts->x_ix86_fpmath to FPMATH_387 when SSE is disabled.

gcc/testsuite/

	PR target/89397
	* gcc.target/i386/pr89397.c: New test.

From-SVN: r269017
This commit is contained in:
H.J. Lu 2019-02-19 14:19:33 +00:00 • committed by H.J. Lu
parent 19695f4d99
commit 23c4471ee5
4 changed files with 25 additions and 4 deletions
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6
gcc/ChangeLog
View file

@ -1,3 +1,9 @@
2019-02-19 H.J. Lu <hongjiu.lu@intel.com>
PR target/89397
* config/i386/i386.c (ix86_option_override_internal): Set
opts->x_ix86_fpmath to FPMATH_387 when SSE is disabled.
2019-02-19 Richard Biener <rguenther@suse.de>
PR middle-end/88074

7
gcc/config/i386/i386.c
View file

@ -4310,10 +4310,9 @@ ix86_option_override_internal (bool main_args_p,
if (!TARGET_SSE_P (opts->x_ix86_isa_flags))
{
if (TARGET_80387_P (opts->x_target_flags))
{
warning (0, "SSE instruction set disabled, using 387 arithmetics");
opts->x_ix86_fpmath = FPMATH_387;
}
warning (0, "SSE instruction set disabled, using 387 arithmetics");
/* NB: 387 codegen is guarded by TARGET_80387. */
opts->x_ix86_fpmath = FPMATH_387;
}
else if ((opts->x_ix86_fpmath & FPMATH_387)
&& !TARGET_80387_P (opts->x_target_flags))

5
gcc/testsuite/ChangeLog
View file

@ -1,3 +1,8 @@
2019-02-19 H.J. Lu <hongjiu.lu@intel.com>
PR target/89397
* gcc.target/i386/pr89397.c: New test.
2019-02-19 Richard Biener <rguenther@suse.de>
PR middle-end/88074

11
gcc/testsuite/gcc.target/i386/pr89397.c Normal file
View file

@ -0,0 +1,11 @@
/* { dg-do compile } */
/* { dg-options "-mfpmath=sse,387 -msoft-float -mno-sse" } */
_Atomic double a;
int b;
void
foo (void)
{
a += b; /* { dg-error "SSE register return with SSE disabled" "" { target { ! ia32 } } } */
}