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i386.c (override_options): Respect user disable of fancy 387 math, sse, mmx. 

* config/i386/i386.c (override_options): Respect user disable of
        fancy 387 math, sse, mmx.
        (construct_container): Generate error if we need an sse regster
        and sse has been disabled.
        * config/i386/i386.h (TARGET_SWITCHES): Disabling sse also disables
        later sse generations.  Disabling mmx also disables 3dnow.

From-SVN: r92530
This commit is contained in:
Richard Henderson 2004-12-22 19:49:04 -08:00 committed by Richard Henderson
parent b9cd7e9d86
commit a5370cf0e6
6 changed files with 72 additions and 27 deletions
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9
gcc/ChangeLog
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@ -1,3 +1,12 @@
2004-12-22 Richard Henderson <rth@redhat.com>
* config/i386/i386.c (override_options): Respect user disable of
fancy 387 math, sse, mmx.
(construct_container): Generate error if we need an sse regster
and sse has been disabled.
* config/i386/i386.h (TARGET_SWITCHES): Disabling sse also disables
later sse generations. Disabling mmx also disables 3dnow.
2004-12-22 Daniel Berlin <dberlin@dberlin.org>
* tree-inline.c (struct inline_data): Remove inlined_fns.

65
gcc/config/i386/i386.c
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@ -1473,7 +1473,8 @@ override_options (void)
/* If the architecture always has an FPU, turn off NO_FANCY_MATH_387,
since the insns won't need emulation. */
if (x86_arch_always_fancy_math_387 & (1 << ix86_arch))
if (!(target_flags_explicit & MASK_NO_FANCY_MATH_387)
&& (x86_arch_always_fancy_math_387 & (1 << ix86_arch)))
target_flags &= ~MASK_NO_FANCY_MATH_387;
/* Likewise, if the target doesn't have a 387, or we've specified
@ -1489,15 +1490,33 @@ override_options (void)
if (TARGET_SSE2)
target_flags |= MASK_SSE;
/* Turn on MMX builtins for -msse. */
if (TARGET_SSE)
{
target_flags |= MASK_MMX & ~target_flags_explicit;
x86_prefetch_sse = true;
}
/* Turn on MMX builtins for 3Dnow. */
if (TARGET_3DNOW)
target_flags |= MASK_MMX;
if (TARGET_64BIT)
{
if (TARGET_ALIGN_DOUBLE)
error ("-malign-double makes no sense in the 64bit mode");
if (TARGET_RTD)
error ("-mrtd calling convention not supported in the 64bit mode");
/* Enable by default the SSE and MMX builtins. */
target_flags |= (MASK_SSE2 | MASK_SSE | MASK_MMX | MASK_128BIT_LONG_DOUBLE);
ix86_fpmath = FPMATH_SSE;
/* Enable by default the SSE and MMX builtins. Do allow the user to
explicitly disable any of these. In particular, disabling SSE and
MMX for kernel code is extremely useful. */
target_flags
|= ((MASK_SSE2 | MASK_SSE | MASK_MMX | MASK_128BIT_LONG_DOUBLE)
& ~target_flags_explicit);
if (TARGET_SSE)
ix86_fpmath = FPMATH_SSE;
}
else
{
@ -1546,23 +1565,6 @@ override_options (void)
if (! (ix86_fpmath & FPMATH_387))
target_flags |= MASK_NO_FANCY_MATH_387;
/* It makes no sense to ask for just SSE builtins, so MMX is also turned
on by -msse. */
if (TARGET_SSE)
{
target_flags |= MASK_MMX;
x86_prefetch_sse = true;
}
/* If it has 3DNow! it also has MMX so MMX is also turned on by -m3dnow */
if (TARGET_3DNOW)
{
target_flags |= MASK_MMX;
/* If we are targeting the Athlon architecture, enable the 3Dnow/MMX
extensions it adds. */
if (x86_3dnow_a & (1 << ix86_arch))
target_flags |= MASK_3DNOW_A;
}
if ((x86_accumulate_outgoing_args & TUNEMASK)
&& !(target_flags_explicit & MASK_ACCUMULATE_OUTGOING_ARGS)
&& !optimize_size)
@ -1576,8 +1578,9 @@ override_options (void)
internal_label_prefix_len = p - internal_label_prefix;
*p = '\0';
}
/* When scheduling description is not available, disable scheduler pass so it
won't slow down the compilation and make x87 code slower. */
/* When scheduling description is not available, disable scheduler pass
so it won't slow down the compilation and make x87 code slower. */
if (!TARGET_SCHEDULE)
flag_schedule_insns_after_reload = flag_schedule_insns = 0;
}
@ -2543,6 +2546,22 @@ construct_container (enum machine_mode mode, enum machine_mode orig_mode,
if (needed_intregs > nintregs || needed_sseregs > nsseregs)
return NULL;
/* We allowed the user to turn off SSE for kernel mode. Don't crash if
some less clueful developer tries to use floating-point anyway. */
if (needed_sseregs && !TARGET_SSE)
{
static bool issued_error;
if (!issued_error)
{
issued_error = true;
if (in_return)
error ("SSE register return with SSE disabled");
else
error ("SSE register argument with SSE disabled");
}
return NULL;
}
/* First construct simple cases. Avoid SCmode, since we want to use
single register to pass this type. */
if (n == 1 && mode != SCmode)

8
gcc/config/i386/i386.h
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@ -393,19 +393,19 @@ extern int x86_prefetch_sse;
N_("Do not use push instructions to save outgoing arguments") }, \
{ "mmx", MASK_MMX, \
N_("Support MMX built-in functions") }, \
{ "no-mmx", -MASK_MMX, \
{ "no-mmx", -(MASK_MMX|MASK_3DNOW|MASK_3DNOW_A), \
N_("Do not support MMX built-in functions") }, \
{ "3dnow", MASK_3DNOW, \
N_("Support 3DNow! built-in functions") }, \
{ "no-3dnow", -MASK_3DNOW, \
{ "no-3dnow", -(MASK_3DNOW|MASK_3DNOW_A), \
N_("Do not support 3DNow! built-in functions") }, \
{ "sse", MASK_SSE, \
N_("Support MMX and SSE built-in functions and code generation") }, \
{ "no-sse", -MASK_SSE, \
{ "no-sse", -(MASK_SSE|MASK_SSE2|MASK_SSE3), \
N_("Do not support MMX and SSE built-in functions and code generation") },\
{ "sse2", MASK_SSE2, \
N_("Support MMX, SSE and SSE2 built-in functions and code generation") }, \
{ "no-sse2", -MASK_SSE2, \
{ "no-sse2", -(MASK_SSE2|MASK_SSE3), \
N_("Do not support MMX, SSE and SSE2 built-in functions and code generation") }, \
{ "sse3", MASK_SSE3, \
N_("Support MMX, SSE, SSE2 and SSE3 built-in functions and code generation") },\

5
gcc/testsuite/gcc.target/i386/amd64-abi-1.c Normal file
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@ -0,0 +1,5 @@
/* { dg-do compile { target x86_64-*-* } } */
/* { dg-options "-mno-sse" } */
double foo(void) { return 0; } /* { dg-error "SSE disabled" } */
void bar(double x) { }

6
gcc/testsuite/gcc.target/i386/defines-1.c Normal file
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@ -0,0 +1,6 @@
/* { dg-do compile } */
/* { dg-options "-march=nocona -mno-sse" } */
#if defined(__SSE__) || defined(__SSE2__) || defined(__SSE3__)
#error
#endif

6
gcc/testsuite/gcc.target/i386/defines-2.c Normal file
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@ -0,0 +1,6 @@
/* { dg-do compile } */
/* { dg-options "-march=athlon64 -mno-mmx" } */
#if defined(__MMX__) || defined(__3dNOW__) || defined(__3dNOW_A__)
#error
#endif