1// SPDX-License-Identifier: Apache-2.0
2// SPDX-FileCopyrightText: 2025 The Ebitengine Authors
3
4//go:build !cgo && linux
5
6#include "textflag.h"
7#include "go_asm.h"
8#include "abi_loong64.h"
9
10// these trampolines map the gcc ABI to Go ABI and then calls into the Go equivalent functions.
11// R23 is used as temporary register.
12
13TEXT x_cgo_init_trampoline(SB), NOSPLIT, $16
14 MOVV ·x_cgo_init_call(SB), R23
15 MOVV (R23), R23
16 CALL (R23)
17 RET
18
19TEXT x_cgo_thread_start_trampoline(SB), NOSPLIT, $8
20 MOVV ·x_cgo_thread_start_call(SB), R23
21 MOVV (R23), R23
22 CALL (R23)
23 RET
24
25TEXT x_cgo_setenv_trampoline(SB), NOSPLIT, $8
26 MOVV ·x_cgo_setenv_call(SB), R23
27 MOVV (R23), R23
28 CALL (R23)
29 RET
30
31TEXT x_cgo_unsetenv_trampoline(SB), NOSPLIT, $8
32 MOVV ·x_cgo_unsetenv_call(SB), R23
33 MOVV (R23), R23
34 CALL (R23)
35 RET
36
37TEXT x_cgo_notify_runtime_init_done_trampoline(SB), NOSPLIT, $0
38 CALL ·x_cgo_notify_runtime_init_done(SB)
39 RET
40
41TEXT x_cgo_bindm_trampoline(SB), NOSPLIT, $0
42 CALL ·x_cgo_bindm(SB)
43 RET
44
45// func setg_trampoline(setg uintptr, g uintptr)
46TEXT ·setg_trampoline(SB), NOSPLIT, $0
47 MOVV G+8(FP), R4
48 MOVV setg+0(FP), R23
49 CALL (R23)
50 RET
51
52TEXT threadentry_trampoline(SB), NOSPLIT, $0
53 // See crosscall2.
54 ADDV $(-23*8), R3
55 MOVV R4, (1*8)(R3) // fn unsafe.Pointer
56 MOVV R5, (2*8)(R3) // a unsafe.Pointer
57 MOVV R7, (3*8)(R3) // ctxt uintptr
58
59 SAVE_R22_TO_R31((4*8))
60 SAVE_F24_TO_F31((14*8))
61 MOVV R1, (22*8)(R3)
62
63 MOVV ·threadentry_call(SB), R23
64 MOVV (R23), R23
65 CALL (R23)
66
67 RESTORE_R22_TO_R31((4*8))
68 RESTORE_F24_TO_F31((14*8))
69 MOVV (22*8)(R3), R1
70
71 ADDV $(23*8), R3
72 RET
73
74TEXT ·call5(SB), NOSPLIT, $0-0
75 MOVV fn+0(FP), R23
76 MOVV a1+8(FP), R4
77 MOVV a2+16(FP), R5
78 MOVV a3+24(FP), R6
79 MOVV a4+32(FP), R7
80 MOVV a5+40(FP), R8
81 CALL (R23)
82 MOVV R4, ret+48(FP)
83 RET