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/*
* Copyright (C) 2020 Linux Studio Plugins Project <https://lsp-plug.in/>
* (C) 2020 Vladimir Sadovnikov <sadko4u@gmail.com>
*
* This file is part of lsp-dsp-lib
* Created on: 31 мар. 2020 г.
*
* lsp-dsp-lib is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* any later version.
*
* lsp-dsp-lib is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with lsp-dsp-lib. If not, see <https://www.gnu.org/licenses/>.
*/
#ifndef PRIVATE_DSP_ARCH_X86_AVX_XCR_H_
#define PRIVATE_DSP_ARCH_X86_AVX_XCR_H_
#ifndef PRIVATE_DSP_ARCH_X86_AVX_IMPL
#error "This header should not be included directly"
#endif /* PRIVATE_DSP_ARCH_X86_AVX_IMPL */
namespace lsp
{
namespace x86
{
#ifdef ARCH_X86_AVX
uint64_t read_xcr(umword_t xcr_id)
{
uint64_t xcr;
ARCH_X86_ASM
(
__ASM_EMIT64("xor %%rax, %%rax")
__ASM_EMIT("xgetbv")
__ASM_EMIT64("shl $32, %%rdx")
__ASM_EMIT64("or %%rdx, %%rax")
: __IF_32("=A" (xcr)) __IF_64("=a" (xcr))
: "c" (xcr_id)
: __IF_64("%rdx")
);
return xcr;
}
#else
uint64_t read_xcr(umword_t xcr_id)
{
return 0;
}
#endif /* ARCH_X86_AVX */
}
}
#endif /* PRIVATE_DSP_ARCH_X86_AVX_XCR_H_ */
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