1// Copyright 2022 The Go Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style
3// license that can be found in the LICENSE file.
4
5.file "gcc_loong64.S"
6
7/*
8 * void crosscall1(void (*fn)(void), void (*setg_gcc)(void *g), void *g)
9 *
10 * Calling into the gc tool chain, where all registers are caller save.
11 * Called from standard lp64d ABI, where $r1, $r3, $r23-$r30, and $f24-$f31
12 * are callee-save, so they must be saved explicitly, along with $r1 (LR).
13 */
14.globl crosscall1
15crosscall1:
16	addi.d	$r3, $r3, -160
17	st.d	$r1, $r3, 0
18	st.d	$r23, $r3, 8
19	st.d	$r24, $r3, 16
20	st.d	$r25, $r3, 24
21	st.d	$r26, $r3, 32
22	st.d	$r27, $r3, 40
23	st.d	$r28, $r3, 48
24	st.d	$r29, $r3, 56
25	st.d	$r30, $r3, 64
26	st.d	$r2, $r3, 72
27	st.d	$r22, $r3, 80
28	fst.d	$f24, $r3, 88
29	fst.d	$f25, $r3, 96
30	fst.d	$f26, $r3, 104
31	fst.d	$f27, $r3, 112
32	fst.d	$f28, $r3, 120
33	fst.d	$f29, $r3, 128
34	fst.d	$f30, $r3, 136
35	fst.d	$f31, $r3, 144
36
37	move	$r18, $r4 // save R4
38	move	$r19, $r6
39	jirl	$r1, $r5, 0	// call setg_gcc (clobbers R4)
40	jirl	$r1, $r18, 0	// call fn
41
42	ld.d	$r23, $r3, 8
43	ld.d	$r24, $r3, 16
44	ld.d	$r25, $r3, 24
45	ld.d	$r26, $r3, 32
46	ld.d	$r27, $r3, 40
47	ld.d	$r28, $r3, 48
48	ld.d	$r29, $r3, 56
49	ld.d	$r30, $r3, 64
50	ld.d	$r2, $r3, 72
51	ld.d	$r22, $r3, 80
52	fld.d	$f24, $r3, 88
53	fld.d	$f25, $r3, 96
54	fld.d	$f26, $r3, 104
55	fld.d	$f27, $r3, 112
56	fld.d	$f28, $r3, 120
57	fld.d	$f29, $r3, 128
58	fld.d	$f30, $r3, 136
59	fld.d	$f31, $r3, 144
60	ld.d	$r1, $r3, 0
61	addi.d	$r3, $r3, 160
62	jirl	$r0, $r1, 0
63
64
65#ifdef __ELF__
66.section .note.GNU-stack,"",%progbits
67#endif
68