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https://github.com/ARMSX2/ARMSX2.git
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55 lines
1.6 KiB
NASM
55 lines
1.6 KiB
NASM
; SPDX-FileCopyrightText: 2002-2026 PCSX2 Dev Team
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; SPDX-License-Identifier: GPL-3.0+
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; -----------------------------------------
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; 64-bit ARM (AArch64) - Microsoft armasm64
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; -----------------------------------------
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; MSVC (unlike clang-cl) does not accept GNU inline asm, so on Windows the
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; fastjmp routines are assembled from this file instead of common/FastJmp.cpp.
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; The register set and buffer offsets mirror the inline AArch64 implementation
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; in FastJmp.cpp. Windows AArch64 follows AAPCS64, so the same callee-saved
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; registers (x19-x28, x29, x30, sp, d8-d15) must be preserved.
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AREA |.text|, CODE, READONLY
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EXPORT fastjmp_set
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EXPORT fastjmp_jmp
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; int fastjmp_set(fastjmp_buf* buf) ; buf in x0
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fastjmp_set PROC
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mov x16, sp
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stp x16, x30, [x0]
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stp x19, x20, [x0, #16]
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stp x21, x22, [x0, #32]
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stp x23, x24, [x0, #48]
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stp x25, x26, [x0, #64]
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stp x27, x28, [x0, #80]
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str x29, [x0, #96]
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stp d8, d9, [x0, #112]
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stp d10, d11, [x0, #128]
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stp d12, d13, [x0, #144]
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stp d14, d15, [x0, #160]
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mov w0, wzr
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ret
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ENDP
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; void fastjmp_jmp(const fastjmp_buf* buf, int ret) ; buf in x0, ret in w1
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fastjmp_jmp PROC
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ldp x16, x30, [x0]
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mov sp, x16
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ldp x19, x20, [x0, #16]
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ldp x21, x22, [x0, #32]
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ldp x23, x24, [x0, #48]
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ldp x25, x26, [x0, #64]
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ldp x27, x28, [x0, #80]
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ldr x29, [x0, #96]
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ldp d8, d9, [x0, #112]
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ldp d10, d11, [x0, #128]
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ldp d12, d13, [x0, #144]
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ldp d14, d15, [x0, #160]
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mov w0, w1
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ret
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ENDP
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END
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