diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/libs/engine/util.hpp | 33 |
1 files changed, 19 insertions, 14 deletions
diff --git a/src/libs/engine/util.hpp b/src/libs/engine/util.hpp index 1daf3554..8f97beb3 100644 --- a/src/libs/engine/util.hpp +++ b/src/libs/engine/util.hpp @@ -27,6 +27,14 @@ #include <xmmintrin.h> #endif +#ifdef USE_ASSEMBLY +# if SIZEOF_VOID_P==8 +# define cpuid(a,b,c,d,n) asm("xchgq %%rbx, %1; cpuid; xchgq %%rbx, %1": "=a" (a), "=r" (b), "=c" (c), "=d" (d) : "a" (n)); +# else +# define cpuid(a,b,c,d,n) asm("xchgl %%ebx, %1; cpuid; xchgl %%ebx, %1": "=a" (a), "=r" (b), "=c" (c), "=d" (d) : "a" (n)); +# endif +#endif + namespace Ingen { /** Set flags to disable denormal processing. @@ -36,27 +44,24 @@ set_denormal_flags() { #ifdef USE_ASSEMBLY #ifdef __SSE__ - unsigned long a, b, c, d; + unsigned long a, b, c, d0, d1; + int stepping, model, family, extfamily; - asm("cpuid": "=a" (a), "=b" (b), "=c" (c), "=d" (d) : "a" (1)); - if (d & 1<<25) { /* It has SSE support */ + cpuid(a,b,c,d1,1); + if (d1 & 1<<25) { /* It has SSE support */ _MM_SET_FLUSH_ZERO_MODE(_MM_FLUSH_ZERO_ON); - - asm("cpuid": "=a" (a), "=b" (b), "=c" (c), "=d" (d) : "a" (0)); + family = (a >> 8) & 0xf; + extfamily = (a >> 20) & 0xff; + model = (a >> 4) & 0xf; + stepping = a & 0xf; + cpuid(a,b,c,d0,0); if (b == 0x756e6547) { /* It's an Intel */ - int stepping, model, family, extfamily; - - family = (a >> 8) & 0xf; - extfamily = (a >> 20) & 0xff; - model = (a >> 4) & 0xf; - stepping = a & 0xf; if (family == 15 && extfamily == 0 && model == 0 && stepping < 7) { return; } } - asm("cpuid": "=a" (a), "=b" (b), "=c" (c), "=d" (d) : "a" (1)); - if (d & 1<<26) { /* bit 26, SSE2 support */ - _mm_setcsr(_mm_getcsr() | 0x40); + if (d1 & 1<<26) { /* bit 26, SSE2 support */ + _mm_setcsr(_mm_getcsr() | 0x8040); // set DAZ and FZ bits of MXCSR //cerr << "Set SSE denormal fix flag." << endl; } } else { |