pcsx2/common/FastJmp.asm

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; SPDX-FileCopyrightText: 2002-2024 PCSX2 Dev Team
; SPDX-License-Identifier: GPL-3.0+
2021-09-21 10:05:20 +00:00
; -----------------------------------------
; 64-bit X86
; -----------------------------------------
_TEXT SEGMENT
PUBLIC fastjmp_set
PUBLIC fastjmp_jmp
; void fastjmp_set(fastjmp_buf*)
fastjmp_set PROC
mov rax, qword ptr [rsp]
mov rdx, rsp ; fixup stack pointer, so it doesn't include the call to fastjmp_set
add rdx, 8
mov qword ptr [rcx], rax ; actually rip
mov qword ptr [rcx + 8], rbx
mov qword ptr [rcx + 16], rdx ; actually rsp
mov qword ptr [rcx + 24], rbp
mov qword ptr [rcx + 32], rsi
mov qword ptr [rcx + 40], rdi
mov qword ptr [rcx + 48], r12
mov qword ptr [rcx + 56], r13
mov qword ptr [rcx + 64], r14
mov qword ptr [rcx + 72], r15
movaps xmmword ptr [rcx + 80], xmm6
movaps xmmword ptr [rcx + 96], xmm7
movaps xmmword ptr [rcx + 112], xmm8
add rcx, 112 ; split to two batches to fit displacement in a single byte
movaps xmmword ptr [rcx + 16], xmm9
movaps xmmword ptr [rcx + 32], xmm10
movaps xmmword ptr [rcx + 48], xmm11
movaps xmmword ptr [rcx + 64], xmm12
movaps xmmword ptr [rcx + 80], xmm13
movaps xmmword ptr [rcx + 96], xmm14
movaps xmmword ptr [rcx + 112], xmm15
xor eax, eax
ret
fastjmp_set ENDP
; void fastjmp_jmp(fastjmp_buf*, int)
fastjmp_jmp PROC
mov eax, edx ; return code
mov rdx, qword ptr [rcx + 0] ; actually rip
mov rbx, qword ptr [rcx + 8]
mov rsp, qword ptr [rcx + 16]
mov rbp, qword ptr [rcx + 24]
mov rsi, qword ptr [rcx + 32]
mov rdi, qword ptr [rcx + 40]
mov r12, qword ptr [rcx + 48]
mov r13, qword ptr [rcx + 56]
mov r14, qword ptr [rcx + 64]
mov r15, qword ptr [rcx + 72]
movaps xmm6, xmmword ptr [rcx + 80]
movaps xmm7, xmmword ptr [rcx + 96]
movaps xmm8, xmmword ptr [rcx + 112]
add rcx, 112 ; split to two batches to fit displacement in a single byte
movaps xmm9, xmmword ptr [rcx + 16]
movaps xmm10, xmmword ptr [rcx + 32]
movaps xmm11, xmmword ptr [rcx + 48]
movaps xmm12, xmmword ptr [rcx + 64]
movaps xmm13, xmmword ptr [rcx + 80]
movaps xmm14, xmmword ptr [rcx + 96]
movaps xmm15, xmmword ptr [rcx + 112]
jmp rdx
fastjmp_jmp ENDP
_TEXT ENDS
END