Current File : /opt/hc_python/lib/python3.12/site-packages/greenlet/platform//switch_x64_masm.asm
;
; stack switching code for MASM on x641
; Kristjan Valur Jonsson, sept 2005
;
;prototypes for our calls
slp_save_state_asm PROTO
slp_restore_state_asm PROTO
pushxmm MACRO reg
sub rsp, 16
.allocstack 16
movaps [rsp], reg ; faster than movups, but we must be aligned
; .savexmm128 reg, offset (don't know what offset is, no documentation)
ENDM
popxmm MACRO reg
movaps reg, [rsp] ; faster than movups, but we must be aligned
add rsp, 16
ENDM
pushreg MACRO reg
push reg
.pushreg reg
ENDM
popreg MACRO reg
pop reg
ENDM
.code
slp_switch PROC FRAME
;realign stack to 16 bytes after return address push, makes the following faster
sub rsp,8
.allocstack 8
pushxmm xmm15
pushxmm xmm14
pushxmm xmm13
pushxmm xmm12
pushxmm xmm11
pushxmm xmm10
pushxmm xmm9
pushxmm xmm8
pushxmm xmm7
pushxmm xmm6
pushreg r15
pushreg r14
pushreg r13
pushreg r12
pushreg rbp
pushreg rbx
pushreg rdi
pushreg rsi
sub rsp, 10h ;allocate the singlefunction argument (must be multiple of 16)
.allocstack 10h
.endprolog
lea rcx, [rsp+10h] ;load stack base that we are saving
call slp_save_state_asm ;pass stackpointer, return offset in eax
cmp rax, 1
je EXIT1
cmp rax, -1
je EXIT2
;actual stack switch:
add rsp, rax
call slp_restore_state_asm
xor rax, rax ;return 0
EXIT:
add rsp, 10h
popreg rsi
popreg rdi
popreg rbx
popreg rbp
popreg r12
popreg r13
popreg r14
popreg r15
popxmm xmm6
popxmm xmm7
popxmm xmm8
popxmm xmm9
popxmm xmm10
popxmm xmm11
popxmm xmm12
popxmm xmm13
popxmm xmm14
popxmm xmm15
add rsp, 8
ret
EXIT1:
mov rax, 1
jmp EXIT
EXIT2:
sar rax, 1
jmp EXIT
slp_switch ENDP
END