// Copyright 2022 The Go Authors. All rights reserved.

// Use of this source code is governed by a BSD-style

// license that can be found in the LICENSE file.

.file "gcc_loong64.S"

/*

* void crosscall1(void (*fn)(void), void (*setg_gcc)(void *g), void *g)

*

* Calling into the gc tool chain, where all registers are caller save.

* Called from standard lp64d ABI, where $r1, $r3, $r23-$r30, and $f24-$f31

* are callee-save, so they must be saved explicitly, along with $r1 (LR).

*/

.globl crosscall1

crosscall1:

addi.d $r3, $r3, -160

st.d $r1, $r3, 0

st.d $r23, $r3, 8

st.d $r24, $r3, 16

st.d $r25, $r3, 24

st.d $r26, $r3, 32

st.d $r27, $r3, 40

st.d $r28, $r3, 48

st.d $r29, $r3, 56

st.d $r30, $r3, 64

st.d $r2, $r3, 72

st.d $r22, $r3, 80

fst.d $f24, $r3, 88

fst.d $f25, $r3, 96

fst.d $f26, $r3, 104

fst.d $f27, $r3, 112

fst.d $f28, $r3, 120

fst.d $f29, $r3, 128

fst.d $f30, $r3, 136

fst.d $f31, $r3, 144

// r4 = *fn, r5 = *setg_gcc, r6 = *g

move $r23, $r4 // save R4

move $r4, $r6

jirl $r1, $r5, 0 // call setg_gcc (clobbers R4)

jirl $r1, $r23, 0 // call fn

ld.d $r23, $r3, 8

ld.d $r24, $r3, 16

ld.d $r25, $r3, 24

ld.d $r26, $r3, 32

ld.d $r27, $r3, 40

ld.d $r28, $r3, 48

ld.d $r29, $r3, 56

ld.d $r30, $r3, 64

ld.d $r2, $r3, 72

ld.d $r22, $r3, 80

fld.d $f24, $r3, 88

fld.d $f25, $r3, 96

fld.d $f26, $r3, 104

fld.d $f27, $r3, 112

fld.d $f28, $r3, 120

fld.d $f29, $r3, 128

fld.d $f30, $r3, 136

fld.d $f31, $r3, 144

ld.d $r1, $r3, 0

addi.d $r3, $r3, 160

jirl $r0, $r1, 0

#ifdef __ELF__

.section .note.GNU-stack,"",%progbits

#endif