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;; Licensed to the .NET Foundation under one or more agreements.
;; The .NET Foundation licenses this file to you under the MIT license.
;; See the LICENSE file in the project root for more information.
;;
;; Unmanaged helpers used by the managed System.GC class.
;;
.586
.model flat
option casemap:none
.code
include AsmMacros.inc
;; DWORD getcpuid(DWORD arg, unsigned char result[16])
FASTCALL_FUNC getcpuid, 8
push ebx
push esi
mov esi, edx
mov eax, ecx
cpuid
mov [esi+ 0], eax
mov [esi+ 4], ebx
mov [esi+ 8], ecx
mov [esi+12], edx
pop esi
pop ebx
ret
FASTCALL_ENDFUNC
;; The following function uses Deterministic Cache Parameter leafs to crack the cache hierarchy information on Prescott & Above platforms.
;; This function takes 3 arguments:
;; Arg1 is an input to ECX. Used as index to specify which cache level to return infoformation on by CPUID.
;; Arg2 is an input to EAX. For deterministic code enumeration, we pass in 4H in arg2.
;; Arg3 is a pointer to the return buffer
;; No need to check whether or not CPUID is supported because we have already called CPUID with success to come here.
;; DWORD getextcpuid(DWORD arg1, DWORD arg2, unsigned char result[16])
FASTCALL_FUNC getextcpuid, 12
push ebx
push esi
mov ecx, ecx
mov eax, edx
cpuid
mov esi, [esp + 12]
mov [esi+ 0], eax
mov [esi+ 4], ebx
mov [esi+ 8], ecx
mov [esi+12], edx
pop esi
pop ebx
ret
FASTCALL_ENDFUNC
end
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