/*-*- mode:unix-assembly; indent-tabs-mode:t; tab-width:8; coding:utf-8     -*-â
âvi: set et ft=asm ts=8 tw=8 fenc=utf-8                                     :viâ
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â Copyright 2020 Justine Alexandra Roberts Tunney                              â
â                                                                              â
â Permission to use, copy, modify, and/or distribute this software for         â
â any purpose with or without fee is hereby granted, provided that the         â
â above copyright notice and this permission notice appear in all copies.      â
â                                                                              â
â THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL                â
â WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED                â
â WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE             â
â AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL         â
â DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR        â
â PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER               â
â TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             â
â PERFORMANCE OF THIS SOFTWARE.                                                â
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#include "libc/macros.internal.h"

//	Loads previously saved processor state.
//
//	@param	rdi points to the jmp_buf
//	@param	esi is returned by setjmp() invocation (coerced nonzero)
//	@noreturn
//	@see	_gclongjmp()
//	@see	siglongjmp()
longjmp:
#ifdef __x86_64__
	mov	%esi,%eax
	test	%eax,%eax
	jnz	1f
	inc	%eax
1:	mov	(%rdi),%rsp
	mov	8(%rdi),%rbx
	mov	16(%rdi),%rbp
	mov	24(%rdi),%r12
	mov	32(%rdi),%r13
	mov	40(%rdi),%r14
	mov	48(%rdi),%r15
	jmp	*56(%rdi)
#elif defined(__aarch64__)
	ldp	x19,x20,[x0,#0]
	ldp	x21,x22,[x0,#16]
	ldp	x23,x24,[x0,#32]
	ldp	x25,x26,[x0,#48]
	ldp	x27,x28,[x0,#64]
	ldp	x29,x30,[x0,#80]
	ldr	x2,[x0,#104]
	mov	sp,x2
	ldp	d8 ,d9,[x0,#112]
	ldp	d10,d11,[x0,#128]
	ldp	d12,d13,[x0,#144]
	ldp	d14,d15,[x0,#160]
	cmp	w1,0
	csinc	w0,w1,wzr,ne
	br	x30
#endif
	.endfn	longjmp,globl
	.alias	longjmp,_longjmp
