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https://github.com/DrBeef/QuestZDoom.git
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57 lines
943 B
ArmAsm
57 lines
943 B
ArmAsm
/*
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getcpuflags_x86_64: get cpuflags for x86-64
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copyright 1995-2013 by the mpg123 project - free software under the terms of the LGPL 2.1
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see COPYING and AUTHORS files in distribution or http://mpg123.org
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initially written by Taihei Monma
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*/
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#include "mangle.h"
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.text
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ALIGN4
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.globl ASM_NAME(getcpuflags)
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ASM_NAME(getcpuflags):
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push %rbp
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mov %rsp, %rbp
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push %rbx
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#ifdef IS_MSABI
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push %rdi
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mov %rcx, %rdi
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#endif
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movl $0, 12(%rdi)
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movl $0, 16(%rdi)
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mov $0x80000000, %eax
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cpuid
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cmp $0x80000001, %eax
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jb 1f
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mov $0x80000001, %eax
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cpuid
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movl %edx, 12(%rdi)
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1:
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mov $0x00000001, %eax
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cpuid
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movl %eax, (%rdi)
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movl %ecx, 4(%rdi)
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movl %edx, 8(%rdi)
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test $0x04000000, %ecx
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jz 2f
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test $0x08000000, %ecx
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jz 2f
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xor %ecx, %ecx
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.byte 0x0f, 0x01, 0xd0 /* xgetbv instruction */
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movl %eax, 16(%rdi)
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movl (%rdi), %eax
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2:
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#ifdef IS_MSABI
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pop %rdi
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#endif
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pop %rbx
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mov %rbp, %rsp
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pop %rbp
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ret
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NONEXEC_STACK
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