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// Copyright 2022 The Marl Authors.
//
// Licensed 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
//
// https://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 defined(__loongarch_lp64)
#define MARL_BUILD_ASM 1
#include "osfiber_asm_loongarch64.h"
// void marl_fiber_swap(marl_fiber_context* from, const marl_fiber_context* to)
// a0: from
// a1: to
.text
.global marl_fiber_swap
.align 4
marl_fiber_swap:
// Save context 'from'
// Store callee-preserved registers
st.d $s0, $a0, MARL_REG_s0
st.d $s1, $a0, MARL_REG_s1
st.d $s2, $a0, MARL_REG_s2
st.d $s3, $a0, MARL_REG_s3
st.d $s4, $a0, MARL_REG_s4
st.d $s5, $a0, MARL_REG_s5
st.d $s6, $a0, MARL_REG_s6
st.d $s7, $a0, MARL_REG_s7
st.d $s8, $a0, MARL_REG_s8
fst.d $fs0, $a0, MARL_REG_fs0
fst.d $fs1, $a0, MARL_REG_fs1
fst.d $fs2, $a0, MARL_REG_fs2
fst.d $fs3, $a0, MARL_REG_fs3
fst.d $fs4, $a0, MARL_REG_fs4
fst.d $fs5, $a0, MARL_REG_fs5
fst.d $fs6, $a0, MARL_REG_fs6
fst.d $fs7, $a0, MARL_REG_fs7
st.d $ra, $a0, MARL_REG_ra
st.d $sp, $a0, MARL_REG_sp
st.d $fp, $a0, MARL_REG_fp
// Recover callee-preserved registers
ld.d $s0, $a1, MARL_REG_s0
ld.d $s1, $a1, MARL_REG_s1
ld.d $s2, $a1, MARL_REG_s2
ld.d $s3, $a1, MARL_REG_s3
ld.d $s4, $a1, MARL_REG_s4
ld.d $s5, $a1, MARL_REG_s5
ld.d $s6, $a1, MARL_REG_s6
ld.d $s7, $a1, MARL_REG_s7
ld.d $s8, $a1, MARL_REG_s8
fld.d $fs0, $a1, MARL_REG_fs0
fld.d $fs1, $a1, MARL_REG_fs1
fld.d $fs2, $a1, MARL_REG_fs2
fld.d $fs3, $a1, MARL_REG_fs3
fld.d $fs4, $a1, MARL_REG_fs4
fld.d $fs5, $a1, MARL_REG_fs5
fld.d $fs6, $a1, MARL_REG_fs6
fld.d $fs7, $a1, MARL_REG_fs7
ld.d $ra, $a1, MARL_REG_ra
ld.d $sp, $a1, MARL_REG_sp
ld.d $fp, $a1, MARL_REG_fp
// Recover arguments
ld.d $a0, $a1, MARL_REG_a0
ld.d $a1, $a1, MARL_REG_a1
jr $ra // Jump to the trampoline
#endif // defined(__loongarch_lp64)