git.sr.ht/~pingoo/stdx@v0.0.0-20240218134121-094174641f6e/cpuinfo/cpuid_386.s (about) 1 // Copyright (c) 2015 Klaus Post, released under MIT License. See LICENSE file. 2 3 //+build 386,!gccgo,!noasm,!appengine 4 5 // func asmCpuid(op uint32) (eax, ebx, ecx, edx uint32) 6 TEXT ·asmCpuid(SB), 7, $0 7 XORL CX, CX 8 MOVL op+0(FP), AX 9 CPUID 10 MOVL AX, eax+4(FP) 11 MOVL BX, ebx+8(FP) 12 MOVL CX, ecx+12(FP) 13 MOVL DX, edx+16(FP) 14 RET 15 16 // func asmCpuidex(op, op2 uint32) (eax, ebx, ecx, edx uint32) 17 TEXT ·asmCpuidex(SB), 7, $0 18 MOVL op+0(FP), AX 19 MOVL op2+4(FP), CX 20 CPUID 21 MOVL AX, eax+8(FP) 22 MOVL BX, ebx+12(FP) 23 MOVL CX, ecx+16(FP) 24 MOVL DX, edx+20(FP) 25 RET 26 27 // func xgetbv(index uint32) (eax, edx uint32) 28 TEXT ·asmXgetbv(SB), 7, $0 29 MOVL index+0(FP), CX 30 BYTE $0x0f; BYTE $0x01; BYTE $0xd0 // XGETBV 31 MOVL AX, eax+4(FP) 32 MOVL DX, edx+8(FP) 33 RET 34 35 // func asmRdtscpAsm() (eax, ebx, ecx, edx uint32) 36 TEXT ·asmRdtscpAsm(SB), 7, $0 37 BYTE $0x0F; BYTE $0x01; BYTE $0xF9 // RDTSCP 38 MOVL AX, eax+0(FP) 39 MOVL BX, ebx+4(FP) 40 MOVL CX, ecx+8(FP) 41 MOVL DX, edx+12(FP) 42 RET 43 44 // func asmDarwinHasAVX512() bool 45 TEXT ·asmDarwinHasAVX512(SB), 7, $0 46 MOVL $0, eax+0(FP) 47 RET