; Copyright 2002-2019 Intel Corporation.
; 
; This software is provided to you as Sample Source Code as defined in the accompanying
; End User License Agreement for the Intel(R) Software Development Products ("Agreement")
; section 1.L.
; 
; This software and the related documents are provided as is, with no express or implied
; warranties, other than those that are expressly stated in the License.

include asm_macros.inc

PROLOGUE



extern xsaveArea:qword
extern flags:qword

.code

; void DoXsavec();
; This function calls xsave and stores the FP state in the given dst area.
; The caller is expected to allocate enough space for the xsave area.
; The function expects the given dst pointer to be properly aligned for the xsave instruction.
DoXsavec PROC

    lea     GCX_REG, flags
    mov     GAX_REG, [GCX_REG]
    lea     GCX_REG, xsaveArea
    xor     GDX_REG, GDX_REG

    ; Do xsave
    xsavec   [GCX_REG]

    ret
DoXsavec ENDP

extern xsaveArea:qword

.code

; void DoXsaveOpt();
; This function calls xsave and stores the FP state in the given dst area.
; The caller is expected to allocate enough space for the xsave area.
; The function expects the given dst pointer to be properly aligned for the xsave instruction.
DoXsaveOpt PROC

    lea     GCX_REG, flags
    mov     GAX_REG, [GCX_REG]
    lea     GCX_REG, xsaveArea
    xor     GDX_REG, GDX_REG

    ; Do xsaveopt
    xsaveopt   [GCX_REG]

    ret
DoXsaveOpt ENDP

; void DoXrstor();
; This function calls xrstor and restores the specified thetures from the xsave dst area.
; The function expects the given dst pointer to be properly aligned
DoXrstor PROC

    lea     GCX_REG, flags
    mov     GAX_REG, [GCX_REG]
    lea     GCX_REG, xsaveArea
    xor     GDX_REG, GDX_REG

    ; Do xsaveopt
    xsaveopt   [GCX_REG]

    ret
DoXrstor ENDP

end