mirror of https://github.com/PCSX2/pcsx2.git
130 lines
4.0 KiB
NASM
130 lines
4.0 KiB
NASM
; PCSX2 - PS2 Emulator for PCs
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; Copyright (C) 2002-2021 PCSX2 Dev Team
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;
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; PCSX2 is free software: you can redistribute it and/or modify it under the terms
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; of the GNU Lesser General Public License as published by the Free Software Found-
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; ation, either version 3 of the License, or (at your option) any later version.
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;
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; PCSX2 is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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; PURPOSE. See the GNU General Public License for more details.
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;
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; You should have received a copy of the GNU General Public License along with PCSX2.
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; If not, see <http://www.gnu.org/licenses/>.
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IFDEF _M_X86_32
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; -----------------------------------------
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; 32-bit X86
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; -----------------------------------------
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.386
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.model flat
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_TEXT SEGMENT
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PUBLIC @fastjmp_set@4
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PUBLIC @fastjmp_jmp@8
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; void fastjmp_set(fastjmp_buf*)
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@fastjmp_set@4 PROC
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mov eax, dword ptr [esp]
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mov edx, esp ; fixup stack pointer, so it doesn't include the call to fastjmp_set
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add edx, 4
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mov dword ptr [ecx], eax ; actually eip
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mov dword ptr [ecx + 4], ebx
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mov dword ptr [ecx + 8], edx ; actually esp
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mov dword ptr [ecx + 12], ebp
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mov dword ptr [ecx + 16], esi
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mov dword ptr [ecx + 20], edi
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xor eax, eax
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ret
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@fastjmp_set@4 ENDP
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; void __fastcall fastjmp_jmp(fastjmp_buf*, int)
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@fastjmp_jmp@8 PROC
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mov eax, edx ; return code
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mov edx, dword ptr [ecx + 0]
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mov ebx, dword ptr [ecx + 4]
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mov esp, dword ptr [ecx + 8]
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mov ebp, dword ptr [ecx + 12]
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mov esi, dword ptr [ecx + 16]
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mov edi, dword ptr [ecx + 20]
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jmp edx
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@fastjmp_jmp@8 ENDP
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_TEXT ENDS
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ENDIF ; _M_X86_32
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IFDEF _M_X86_64
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; -----------------------------------------
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; 64-bit X86
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; -----------------------------------------
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_TEXT SEGMENT
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PUBLIC fastjmp_set
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PUBLIC fastjmp_jmp
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; void fastjmp_set(fastjmp_buf*)
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fastjmp_set PROC
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mov rax, qword ptr [rsp]
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mov rdx, rsp ; fixup stack pointer, so it doesn't include the call to fastjmp_set
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add rdx, 8
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mov qword ptr [rcx], rax ; actually rip
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mov qword ptr [rcx + 8], rbx
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mov qword ptr [rcx + 16], rdx ; actually rsp
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mov qword ptr [rcx + 24], rbp
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mov qword ptr [rcx + 32], rsi
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mov qword ptr [rcx + 40], rdi
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mov qword ptr [rcx + 48], r12
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mov qword ptr [rcx + 56], r13
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mov qword ptr [rcx + 64], r14
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mov qword ptr [rcx + 72], r15
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movaps xmmword ptr [rcx + 80], xmm6
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movaps xmmword ptr [rcx + 96], xmm7
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movaps xmmword ptr [rcx + 112], xmm8
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add rcx, 112 ; split to two batches to fit displacement in a single byte
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movaps xmmword ptr [rcx + 16], xmm9
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movaps xmmword ptr [rcx + 32], xmm10
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movaps xmmword ptr [rcx + 48], xmm11
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movaps xmmword ptr [rcx + 64], xmm12
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movaps xmmword ptr [rcx + 80], xmm13
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movaps xmmword ptr [rcx + 96], xmm14
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movaps xmmword ptr [rcx + 112], xmm15
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xor eax, eax
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ret
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fastjmp_set ENDP
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; void fastjmp_jmp(fastjmp_buf*, int)
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fastjmp_jmp PROC
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mov eax, edx ; return code
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mov rdx, qword ptr [rcx + 0] ; actually rip
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mov rbx, qword ptr [rcx + 8]
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mov rsp, qword ptr [rcx + 16]
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mov rbp, qword ptr [rcx + 24]
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mov rsi, qword ptr [rcx + 32]
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mov rdi, qword ptr [rcx + 40]
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mov r12, qword ptr [rcx + 48]
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mov r13, qword ptr [rcx + 56]
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mov r14, qword ptr [rcx + 64]
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mov r15, qword ptr [rcx + 72]
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movaps xmm6, xmmword ptr [rcx + 80]
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movaps xmm7, xmmword ptr [rcx + 96]
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movaps xmm8, xmmword ptr [rcx + 112]
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add rcx, 112 ; split to two batches to fit displacement in a single byte
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movaps xmm9, xmmword ptr [rcx + 16]
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movaps xmm10, xmmword ptr [rcx + 32]
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movaps xmm11, xmmword ptr [rcx + 48]
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movaps xmm12, xmmword ptr [rcx + 64]
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movaps xmm13, xmmword ptr [rcx + 80]
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movaps xmm14, xmmword ptr [rcx + 96]
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movaps xmm15, xmmword ptr [rcx + 112]
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jmp rdx
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fastjmp_jmp ENDP
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_TEXT ENDS
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ENDIF ; _M_X86_64
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END
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