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%include "defs.asm"
;************************* cpuid64.asm *********************************
; Author: Agner Fog
; Date created: 2008-12-14
; Last modified: 2011-07-01
; Source URL: www.agner.org/optimize
; Project: asmlib.zip
; Description:
; This function calls the CPUID instruction.
;
; Copyright (c) 2011 GNU General Public License www.gnu.org/licenses
;******************************************************************************
default rel
global cpuid_ex: function
SECTION .text align=16
; ********** cpuid_ex function **********
; C++ prototype:
; extern "C" void cpuid_ex (int abcd[4], int a, int c);
; Input: a = eax, c = ecx
; Output: abcd[0] = eax, abcd[1] = ebx, abcd[2] = ecx, abcd[3] = edx
cpuid_ex:
%IFDEF WINDOWS
; parameters: rcx = abcd, edx = a, r8d = c
push rbx
xchg rcx, r8
mov eax, edx
cpuid ; input eax, ecx. output eax, ebx, ecx, edx
mov [r8], eax
mov [r8+4], ebx
mov [r8+8], ecx
mov [r8+12], edx
pop rbx
%ENDIF
%IFDEF UNIX
; parameters: rdi = abcd, esi = a, edx = c
push rbx
mov eax, esi
mov ecx, edx
cpuid ; input eax, ecx. output eax, ebx, ecx, edx
mov [rdi], eax
mov [rdi+4], ebx
mov [rdi+8], ecx
mov [rdi+12], edx
pop rbx
%ENDIF
ret
;cpuid_ex END
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