############################################################################
# libs/libc/machine/risc-v/common/arch_setjmp.S
#
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements.  See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.  The
# ASF licenses this file to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance with the
# License.  You may obtain a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
# License for the specific language governing permissions and limitations
# under the License.
#
############################################################################

#if __riscv_xlen == 64
#  define SZREG	8
#  define REG_S sd
#  define REG_L ld
#elif __riscv_xlen == 32
#  define SZREG	4
#  define REG_S sw
#  define REG_L lw
#else
#  error __riscv_xlen must equal 32 or 64
#endif

.section .text
.globl  setjmp
.type   setjmp, @function

setjmp:
	REG_S ra,  0*SZREG(a0)
	REG_S s0,  1*SZREG(a0)
	REG_S s1,  2*SZREG(a0)

	REG_S s2,  3*SZREG(a0)
	REG_S s3,  4*SZREG(a0)
	REG_S s4,  5*SZREG(a0)
	REG_S s5,  6*SZREG(a0)
	REG_S s6,  7*SZREG(a0)
	REG_S s7,  8*SZREG(a0)
	REG_S s8,  9*SZREG(a0)
	REG_S s9, 10*SZREG(a0)
	REG_S s10,11*SZREG(a0)
	REG_S s11,12*SZREG(a0)
	REG_S sp, 13*SZREG(a0)

	li    a0, 0
	ret
	.size	setjmp, .-setjmp

/* volatile void longjmp (jmp_buf, int);  */

.section .text
.globl  longjmp
.type   longjmp, @function
longjmp:
	REG_L ra,  0*SZREG(a0)
	REG_L s0,  1*SZREG(a0)
	REG_L s1,  2*SZREG(a0)

	REG_L s2,  3*SZREG(a0)
	REG_L s3,  4*SZREG(a0)
	REG_L s4,  5*SZREG(a0)
	REG_L s5,  6*SZREG(a0)
	REG_L s6,  7*SZREG(a0)
	REG_L s7,  8*SZREG(a0)
	REG_L s8,  9*SZREG(a0)
	REG_L s9, 10*SZREG(a0)
	REG_L s10,11*SZREG(a0)
	REG_L s11,12*SZREG(a0)
	REG_L sp, 13*SZREG(a0)

	seqz a0, a1
	add  a0, a0, a1   # a0 = (a1 == 0) ? 1 : a1
	ret
	.size	longjmp, .-longjmp