1 | /* Miscellaneous macros. |
2 | Copyright (C) 2000-2024 Free Software Foundation, Inc. |
3 | This file is part of the GNU C Library. |
4 | |
5 | The GNU C Library is free software; you can redistribute it and/or |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either |
8 | version 2.1 of the License, or (at your option) any later version. |
9 | |
10 | The GNU C Library is distributed in the hope that it will be useful, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
13 | Lesser General Public License for more details. |
14 | |
15 | You should have received a copy of the GNU Lesser General Public |
16 | License along with the GNU C Library. If not, see |
17 | <https://www.gnu.org/licenses/>. */ |
18 | |
19 | #ifndef _SYS_ASM_H |
20 | #define _SYS_ASM_H |
21 | |
22 | /* Macros to handle different pointer/register sizes for 32/64-bit code. */ |
23 | #if __riscv_xlen == 64 |
24 | # define PTRLOG 3 |
25 | # define SZREG 8 |
26 | # define REG_S sd |
27 | # define REG_L ld |
28 | #elif __riscv_xlen == 32 |
29 | # define PTRLOG 2 |
30 | # define SZREG 4 |
31 | # define REG_S sw |
32 | # define REG_L lw |
33 | #else |
34 | # error __riscv_xlen must equal 32 or 64 |
35 | #endif |
36 | |
37 | #if !defined __riscv_float_abi_soft |
38 | /* For ABI uniformity, reserve 8 bytes for floats, even if double-precision |
39 | floating-point is not supported in hardware. */ |
40 | # if defined __riscv_float_abi_double |
41 | # define FREG_L fld |
42 | # define FREG_S fsd |
43 | # define SZFREG 8 |
44 | # else |
45 | # error unsupported FLEN |
46 | # endif |
47 | #endif |
48 | |
49 | /* Declare leaf routine. */ |
50 | #define LEAF(symbol) \ |
51 | .globl symbol; \ |
52 | .align 2; \ |
53 | .type symbol,@function; \ |
54 | symbol: \ |
55 | cfi_startproc; |
56 | |
57 | /* Mark end of function. */ |
58 | #undef END |
59 | #define END(function) \ |
60 | cfi_endproc; \ |
61 | .size function,.-function |
62 | |
63 | /* Stack alignment. */ |
64 | #define ALMASK ~15 |
65 | |
66 | #endif /* sys/asm.h */ |
67 | |