diff options
Diffstat (limited to 'vendor/github.com/klauspost/cpuid/v2/cpuid_amd64.s')
| -rw-r--r-- | vendor/github.com/klauspost/cpuid/v2/cpuid_amd64.s | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/vendor/github.com/klauspost/cpuid/v2/cpuid_amd64.s b/vendor/github.com/klauspost/cpuid/v2/cpuid_amd64.s new file mode 100644 index 00000000..bc11f894 --- /dev/null +++ b/vendor/github.com/klauspost/cpuid/v2/cpuid_amd64.s @@ -0,0 +1,72 @@ +// Copyright (c) 2015 Klaus Post, released under MIT License. See LICENSE file. + +//+build amd64,!gccgo,!noasm,!appengine + +// func asmCpuid(op uint32) (eax, ebx, ecx, edx uint32) +TEXT ·asmCpuid(SB), 7, $0 + XORQ CX, CX + MOVL op+0(FP), AX + CPUID + MOVL AX, eax+8(FP) + MOVL BX, ebx+12(FP) + MOVL CX, ecx+16(FP) + MOVL DX, edx+20(FP) + RET + +// func asmCpuidex(op, op2 uint32) (eax, ebx, ecx, edx uint32) +TEXT ·asmCpuidex(SB), 7, $0 + MOVL op+0(FP), AX + MOVL op2+4(FP), CX + CPUID + MOVL AX, eax+8(FP) + MOVL BX, ebx+12(FP) + MOVL CX, ecx+16(FP) + MOVL DX, edx+20(FP) + RET + +// func asmXgetbv(index uint32) (eax, edx uint32) +TEXT ·asmXgetbv(SB), 7, $0 + MOVL index+0(FP), CX + BYTE $0x0f; BYTE $0x01; BYTE $0xd0 // XGETBV + MOVL AX, eax+8(FP) + MOVL DX, edx+12(FP) + RET + +// func asmRdtscpAsm() (eax, ebx, ecx, edx uint32) +TEXT ·asmRdtscpAsm(SB), 7, $0 + BYTE $0x0F; BYTE $0x01; BYTE $0xF9 // RDTSCP + MOVL AX, eax+0(FP) + MOVL BX, ebx+4(FP) + MOVL CX, ecx+8(FP) + MOVL DX, edx+12(FP) + RET + +// From https://go-review.googlesource.com/c/sys/+/285572/ +// func asmDarwinHasAVX512() bool +TEXT ·asmDarwinHasAVX512(SB), 7, $0-1 + MOVB $0, ret+0(FP) // default to false + +#ifdef GOOS_darwin // return if not darwin +#ifdef GOARCH_amd64 // return if not amd64 +// These values from: +// https://github.com/apple/darwin-xnu/blob/xnu-4570.1.46/osfmk/i386/cpu_capabilities.h +#define commpage64_base_address 0x00007fffffe00000 +#define commpage64_cpu_capabilities64 (commpage64_base_address+0x010) +#define commpage64_version (commpage64_base_address+0x01E) +#define hasAVX512F 0x0000004000000000 + MOVQ $commpage64_version, BX + MOVW (BX), AX + CMPW AX, $13 // versions < 13 do not support AVX512 + JL no_avx512 + MOVQ $commpage64_cpu_capabilities64, BX + MOVQ (BX), AX + MOVQ $hasAVX512F, CX + ANDQ CX, AX + JZ no_avx512 + MOVB $1, ret+0(FP) + +no_avx512: +#endif +#endif + RET + |