Sha256: 163f645a202a3a7cc78d5a6e099edc02221f744e5e9227606eaf226c8c0a894b
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Size: 1.85 KB
Versions: 16
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Stored size: 1.85 KB
Contents
// 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
Version data entries
16 entries across 16 versions & 1 rubygems