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Merge the fesetround FPU handler with the assembly one

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The assembly is only needed for SSE since we can't access the intrinsics
without the -msse switch, which itself would cause SSE code to be generated
elsewhere automtically.
This commit is contained in:
Chris Robinson 2013-05-22 22:21:00 -07:00
parent 38a9e642df
commit eb15b13ca1
1 changed files with 23 additions and 22 deletions
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45
Alc/helpers.c
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@ -201,19 +201,20 @@ void al_free(void *ptr)
void SetMixerFPUMode(FPUCtl *ctl)
{
#if defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__))
unsigned short fpuState;
__asm__ __volatile__("fnstcw %0" : "=m" (*&fpuState));
ctl->state = fpuState;
fpuState &= ~0x300; /* clear precision to single */
fpuState |= 0xC00; /* set round-to-zero */
__asm__ __volatile__("fldcw %0" : : "m" (*&fpuState));
#ifdef HAVE_SSE
#if defined(HAVE_FESETROUND)
ctl->state = fegetround();
#if defined(__GNUC__) && defined(HAVE_SSE)
if((CPUCapFlags&CPU_CAP_SSE))
__asm__ __volatile__("stmxcsr %0" : "=m" (*&ctl->sse_state));
#endif
#ifdef FE_TOWARDZERO
fesetround(FE_TOWARDZERO);
#endif
#if defined(__GNUC__) && defined(HAVE_SSE)
if((CPUCapFlags&CPU_CAP_SSE))
{
int sseState;
__asm__ __volatile__("stmxcsr %0" : "=m" (*&sseState));
ctl->sse_state = sseState;
int sseState = ctl->sse_state;
sseState |= 0x6000; /* set round-to-zero */
sseState |= 0x8000; /* set flush-to-zero */
if((CPUCapFlags&CPU_CAP_SSE2))
@ -221,7 +222,9 @@ void SetMixerFPUMode(FPUCtl *ctl)
__asm__ __volatile__("ldmxcsr %0" : : "m" (*&sseState));
}
#endif
#elif defined(HAVE___CONTROL87_2)
int mode;
__control87_2(0, 0, &ctl->state, NULL);
__control87_2(_RC_CHOP|_PC_24, _MCW_RC|_MCW_PC, &mode, NULL);
@ -232,37 +235,35 @@ void SetMixerFPUMode(FPUCtl *ctl)
__control87_2(_RC_CHOP|_DN_FLUSH, _MCW_RC|_MCW_DN, NULL, &mode);
}
#endif
#elif defined(HAVE__CONTROLFP)
ctl->state = _controlfp(0, 0);
(void)_controlfp(_RC_CHOP|_PC_24, _MCW_RC|_MCW_PC);
#elif defined(HAVE_FESETROUND)
ctl->state = fegetround();
#ifdef FE_TOWARDZERO
fesetround(FE_TOWARDZERO);
#endif
#endif
}
void RestoreFPUMode(const FPUCtl *ctl)
{
#if defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__))
unsigned short fpuState = ctl->state;
__asm__ __volatile__("fldcw %0" : : "m" (*&fpuState));
#ifdef HAVE_SSE
#if defined(HAVE_FESETROUND)
fesetround(ctl->state);
#if defined(__GNUC__) && defined(HAVE_SSE)
if((CPUCapFlags&CPU_CAP_SSE))
__asm__ __volatile__("ldmxcsr %0" : : "m" (*&ctl->sse_state));
#endif
#elif defined(HAVE___CONTROL87_2)
int mode;
__control87_2(ctl->state, _MCW_RC|_MCW_PC, &mode, NULL);
#ifdef HAVE_SSE
if((CPUCapFlags&CPU_CAP_SSE))
__control87_2(ctl->sse_state, _MCW_RC|_MCW_DN, NULL, &mode);
#endif
#elif defined(HAVE__CONTROLFP)
_controlfp(ctl->state, _MCW_RC|_MCW_PC);
#elif defined(HAVE_FESETROUND)
fesetround(ctl->state);
#endif
}