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102 lines
2.3 KiB
102 lines
2.3 KiB
; Copyright 2002-2019 Intel Corporation.
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;
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; This software is provided to you as Sample Source Code as defined in the accompanying
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; End User License Agreement for the Intel(R) Software Development Products ("Agreement")
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; section 1.L.
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;
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; This software and the related documents are provided as is, with no express or implied
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; warranties, other than those that are expressly stated in the License.
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PUBLIC DoXsave
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extern xsaveArea:qword
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extern flags:qword
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.code
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; void DoXsave();
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; This function calls xsave and stores the FP state in the given dst area.
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; The caller is expected to allocate enough space for the xsave area.
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; The function expects the given dst pointer to be properly aligned for the xsave instruction.
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DoXsave PROC
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lea rcx, flags
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mov rax, [rcx]
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lea rcx, xsaveArea
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xor rdx, rdx
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; Do xsave
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xsave [rcx]
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ret
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DoXsave ENDP
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PUBLIC DoXsave
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extern xsaveArea:qword
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.code
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; void DoXsaveOpt();
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; This function calls xsave and stores the FP state in the given dst area.
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; The caller is expected to allocate enough space for the xsave area.
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; The function expects the given dst pointer to be properly aligned for the xsave instruction.
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DoXsaveOpt PROC
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lea rcx, flags
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mov rax, [rcx]
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lea rcx, xsaveArea
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xor rdx, rdx
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; Do xsaveopt
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xsaveopt [rcx]
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ret
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DoXsaveOpt ENDP
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; void DoXrstor();
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; This function calls xrstor and restores the specified thetures from the xsave dst area.
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; The function expects the given dst pointer to be properly aligned
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DoXrstor PROC
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lea rcx, flags
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mov rax, [rcx]
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lea rcx, xsaveArea
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xor rdx, rdx
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; Do xrstor
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xrstor [rcx]
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ret
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DoXrstor ENDP
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; void DoFxsave();
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; This function calls fxsave and stores the legacy FP state in the given dst area.
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; The caller is expected to allocate enough space for the xsave area.
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; The function expects the given dst pointer to be properly aligned for the fxsave instruction.
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DoFxsave PROC
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lea rcx, xsaveArea
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; Do fxsave
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fxsave [rcx]
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ret
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DoFxsave ENDP
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; void Dofxrstor();
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; This function calls fxrstor and restores legacy state from the xsave dst area.
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; The function expects the given dst pointer to be properly aligned
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DoFxrstor PROC
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lea rcx, xsaveArea
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; Do fxrstor
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fxrstor [rcx]
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ret
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DoFxrstor ENDP
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end
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