diff options
Diffstat (limited to 'src/gallium')
| -rw-r--r-- | src/gallium/auxiliary/gallivm/lp_bld_init.c | 11 | ||||
| -rw-r--r-- | src/gallium/auxiliary/util/u_cpu_detect.c | 48 | ||||
| -rw-r--r-- | src/gallium/auxiliary/util/u_cpu_detect.h | 2 |
3 files changed, 59 insertions, 2 deletions
diff --git a/src/gallium/auxiliary/gallivm/lp_bld_init.c b/src/gallium/auxiliary/gallivm/lp_bld_init.c index 61eadb838dc..61b561f9343 100644 --- a/src/gallium/auxiliary/gallivm/lp_bld_init.c +++ b/src/gallium/auxiliary/gallivm/lp_bld_init.c @@ -461,12 +461,15 @@ lp_build_init(void) lp_native_vector_width); if (lp_native_vector_width <= 128) { - /* Hide AVX support, as often LLVM AVX instrinsics are only guarded by + /* Hide AVX support, as often LLVM AVX intrinsics are only guarded by * "util_cpu_caps.has_avx" predicate, and lack the * "lp_native_vector_width > 128" predicate. And also to ensure a more * consistent behavior, allowing one to test SSE2 on AVX machines. + * XXX: should not play games with util_cpu_caps directly as it might + * get used for other things outside llvm too. */ util_cpu_caps.has_avx = 0; + util_cpu_caps.has_avx2 = 0; } if (!HAVE_AVX) { @@ -476,13 +479,17 @@ lp_build_init(void) * omit it unnecessarily on amd cpus, see above). */ util_cpu_caps.has_f16c = 0; + util_cpu_caps.has_xop = 0; } #ifdef PIPE_ARCH_PPC_64 /* Set the NJ bit in VSCR to 0 so denormalized values are handled as - * specified by IEEE standard (PowerISA 2.06 - Section 6.3). This garantees + * specified by IEEE standard (PowerISA 2.06 - Section 6.3). This guarantees * that some rounding and half-float to float handling does not round * incorrectly to 0. + * XXX: should eventually follow same logic on all platforms. + * Right now denorms get explicitly disabled (but elsewhere) for x86, + * whereas ppc64 explicitly enables them... */ if (util_cpu_caps.has_altivec) { unsigned short mask[] = { 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, diff --git a/src/gallium/auxiliary/util/u_cpu_detect.c b/src/gallium/auxiliary/util/u_cpu_detect.c index 87ad780951e..2ff40bb0050 100644 --- a/src/gallium/auxiliary/util/u_cpu_detect.c +++ b/src/gallium/auxiliary/util/u_cpu_detect.c @@ -212,6 +212,44 @@ cpuid(uint32_t ax, uint32_t *p) #endif } +/** + * @sa cpuid.h included in gcc-4.4 onwards. + * @sa http://msdn.microsoft.com/en-us/library/hskdteyh%28v=vs.90%29.aspx + */ +static INLINE void +cpuid_count(uint32_t ax, uint32_t cx, uint32_t *p) +{ +#if (defined(PIPE_CC_GCC) || defined(PIPE_CC_SUNPRO)) && defined(PIPE_ARCH_X86) + __asm __volatile ( + "xchgl %%ebx, %1\n\t" + "cpuid\n\t" + "xchgl %%ebx, %1" + : "=a" (p[0]), + "=S" (p[1]), + "=c" (p[2]), + "=d" (p[3]) + : "0" (ax), "2" (cx) + ); +#elif (defined(PIPE_CC_GCC) || defined(PIPE_CC_SUNPRO)) && defined(PIPE_ARCH_X86_64) + __asm __volatile ( + "cpuid\n\t" + : "=a" (p[0]), + "=b" (p[1]), + "=c" (p[2]), + "=d" (p[3]) + : "0" (ax), "2" (cx) + ); +#elif defined(PIPE_CC_MSVC) + __cpuidex(p, ax, cx); +#else + p[0] = 0; + p[1] = 0; + p[2] = 0; + p[3] = 0; +#endif +} + + static INLINE uint64_t xgetbv(void) { #if defined(PIPE_CC_GCC) @@ -341,6 +379,11 @@ util_cpu_detect(void) if (cacheline > 0) util_cpu_caps.cacheline = cacheline; } + if (util_cpu_caps.has_avx && regs[0] >= 0x00000007) { + uint32_t regs7[4]; + cpuid_count(0x00000007, 0x00000000, regs7); + util_cpu_caps.has_avx2 = (regs7[1] >> 5) & 1; + } if (regs[1] == 0x756e6547 && regs[2] == 0x6c65746e && regs[3] == 0x49656e69) { /* GenuineIntel */ @@ -357,6 +400,9 @@ util_cpu_detect(void) util_cpu_caps.has_mmx2 |= (regs2[3] >> 22) & 1; util_cpu_caps.has_3dnow = (regs2[3] >> 31) & 1; util_cpu_caps.has_3dnow_ext = (regs2[3] >> 30) & 1; + + util_cpu_caps.has_xop = util_cpu_caps.has_avx && + ((regs2[2] >> 11) & 1); } if (regs[0] >= 0x80000006) { @@ -394,10 +440,12 @@ util_cpu_detect(void) debug_printf("util_cpu_caps.has_sse4_1 = %u\n", util_cpu_caps.has_sse4_1); debug_printf("util_cpu_caps.has_sse4_2 = %u\n", util_cpu_caps.has_sse4_2); debug_printf("util_cpu_caps.has_avx = %u\n", util_cpu_caps.has_avx); + debug_printf("util_cpu_caps.has_avx2 = %u\n", util_cpu_caps.has_avx2); debug_printf("util_cpu_caps.has_f16c = %u\n", util_cpu_caps.has_f16c); debug_printf("util_cpu_caps.has_popcnt = %u\n", util_cpu_caps.has_popcnt); debug_printf("util_cpu_caps.has_3dnow = %u\n", util_cpu_caps.has_3dnow); debug_printf("util_cpu_caps.has_3dnow_ext = %u\n", util_cpu_caps.has_3dnow_ext); + debug_printf("util_cpu_caps.has_xop = %u\n", util_cpu_caps.has_xop); debug_printf("util_cpu_caps.has_altivec = %u\n", util_cpu_caps.has_altivec); debug_printf("util_cpu_caps.has_daz = %u\n", util_cpu_caps.has_daz); } diff --git a/src/gallium/auxiliary/util/u_cpu_detect.h b/src/gallium/auxiliary/util/u_cpu_detect.h index cc3e0ce0344..5ccfc931697 100644 --- a/src/gallium/auxiliary/util/u_cpu_detect.h +++ b/src/gallium/auxiliary/util/u_cpu_detect.h @@ -64,9 +64,11 @@ struct util_cpu_caps { unsigned has_sse4_2:1; unsigned has_popcnt:1; unsigned has_avx:1; + unsigned has_avx2:1; unsigned has_f16c:1; unsigned has_3dnow:1; unsigned has_3dnow_ext:1; + unsigned has_xop:1; unsigned has_altivec:1; unsigned has_daz:1; }; |