mirror of git://gcc.gnu.org/git/gcc.git
67 lines
1.3 KiB
C
67 lines
1.3 KiB
C
// Copyright 2018 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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#include <stdint.h>
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#if defined(__i386__) || defined(__x86_64__)
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#include <cpuid.h>
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#include <x86intrin.h>
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#endif
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#include "runtime.h"
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#if defined(__i386__) || defined(__x86_64__)
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struct cpuid_ret {
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uint32_t eax;
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uint32_t ebx;
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uint32_t ecx;
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uint32_t edx;
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};
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struct cpuid_ret cpuid(uint32_t, uint32_t)
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__asm__(GOSYM_PREFIX "internal_cpu.cpuid")
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__attribute__((no_split_stack));
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struct cpuid_ret cpuid(uint32_t eaxArg, uint32_t ecxArg) {
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unsigned int eax = 0;
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unsigned int ebx = 0;
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unsigned int ecx = 0;
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unsigned int edx = 0;
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struct cpuid_ret ret;
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__get_cpuid_count(eaxArg, ecxArg, &eax, &ebx, &ecx, &edx);
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ret.eax = (uint32_t)(eax);
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ret.ebx = (uint32_t)(ebx);
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ret.ecx = (uint32_t)(ecx);
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ret.edx = (uint32_t)(edx);
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return ret;
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}
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struct xgetbv_ret {
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uint32_t eax;
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uint32_t edx;
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};
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struct xgetbv_ret xgetbv(void)
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__asm__(GOSYM_PREFIX "internal_cpu.xgetbv")
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__attribute__((no_split_stack));
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#pragma GCC push_options
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#pragma GCC target("xsave")
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struct xgetbv_ret xgetbv(void) {
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long long r;
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struct xgetbv_ret ret;
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r = _xgetbv(0);
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ret.eax = r & 0xffffffff;
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ret.edx = r >> 32;
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return ret;
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}
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#pragma GCC pop_options
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#endif /* defined(__i386__) || defined(__x86_64__) */
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