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// Macros for transitioning from the host ABI to Go ABI0.
6//
7// These macros save and restore the callee-saved registers
8// from the stack, but they don't adjust stack pointer, so
9// the user should prepare stack space in advance.
10// SAVE_R22_TO_R31(offset) saves R22 ~ R31 to the stack space
11// of ((offset)+0*8)(R3) ~ ((offset)+9*8)(R3).
12//
13// SAVE_F24_TO_F31(offset) saves F24 ~ F31 to the stack space
14// of ((offset)+0*8)(R3) ~ ((offset)+7*8)(R3).
15//
16// Note: g is R22
17
18#define SAVE_R22_TO_R31(offset) \
19 MOVV g, ((offset)+(0*8))(R3) \
20 MOVV R23, ((offset)+(1*8))(R3) \
21 MOVV R24, ((offset)+(2*8))(R3) \
22 MOVV R25, ((offset)+(3*8))(R3) \
23 MOVV R26, ((offset)+(4*8))(R3) \
24 MOVV R27, ((offset)+(5*8))(R3) \
25 MOVV R28, ((offset)+(6*8))(R3) \
26 MOVV R29, ((offset)+(7*8))(R3) \
27 MOVV R30, ((offset)+(8*8))(R3) \
28 MOVV R31, ((offset)+(9*8))(R3)
29
30#define SAVE_F24_TO_F31(offset) \
31 MOVD F24, ((offset)+(0*8))(R3) \
32 MOVD F25, ((offset)+(1*8))(R3) \
33 MOVD F26, ((offset)+(2*8))(R3) \
34 MOVD F27, ((offset)+(3*8))(R3) \
35 MOVD F28, ((offset)+(4*8))(R3) \
36 MOVD F29, ((offset)+(5*8))(R3) \
37 MOVD F30, ((offset)+(6*8))(R3) \
38 MOVD F31, ((offset)+(7*8))(R3)
39
40#define RESTORE_R22_TO_R31(offset) \
41 MOVV ((offset)+(0*8))(R3), g \
42 MOVV ((offset)+(1*8))(R3), R23 \
43 MOVV ((offset)+(2*8))(R3), R24 \
44 MOVV ((offset)+(3*8))(R3), R25 \
45 MOVV ((offset)+(4*8))(R3), R26 \
46 MOVV ((offset)+(5*8))(R3), R27 \
47 MOVV ((offset)+(6*8))(R3), R28 \
48 MOVV ((offset)+(7*8))(R3), R29 \
49 MOVV ((offset)+(8*8))(R3), R30 \
50 MOVV ((offset)+(9*8))(R3), R31
51
52#define RESTORE_F24_TO_F31(offset) \
53 MOVD ((offset)+(0*8))(R3), F24 \
54 MOVD ((offset)+(1*8))(R3), F25 \
55 MOVD ((offset)+(2*8))(R3), F26 \
56 MOVD ((offset)+(3*8))(R3), F27 \
57 MOVD ((offset)+(4*8))(R3), F28 \
58 MOVD ((offset)+(5*8))(R3), F29 \
59 MOVD ((offset)+(6*8))(R3), F30 \
60 MOVD ((offset)+(7*8))(R3), F31