| 1 | /* Miscellaneous macros. |
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| 2 | Copyright (C) 2000-2022 Free Software Foundation, Inc. |
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| 3 | This file is part of the GNU C Library. |
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| 4 | |
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| 5 | The GNU C Library is free software; you can redistribute it and/or |
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| 6 | modify it under the terms of the GNU Lesser General Public |
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| 7 | License as published by the Free Software Foundation; either |
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| 8 | version 2.1 of the License, or (at your option) any later version. |
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| 9 | |
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| 10 | The GNU C Library is distributed in the hope that it will be useful, |
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 13 | Lesser General Public License for more details. |
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| 14 | |
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| 15 | You should have received a copy of the GNU Lesser General Public |
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| 16 | License along with the GNU C Library. If not, see |
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| 17 | <https://www.gnu.org/licenses/>. */ |
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| 18 | |
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| 19 | #ifndef _SYS_ASM_H |
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| 20 | #define _SYS_ASM_H |
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| 21 | |
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| 22 | /* Macros to handle different pointer/register sizes for 32/64-bit code. */ |
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| 23 | #if __riscv_xlen == 64 |
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| 24 | # define PTRLOG 3 |
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| 25 | # define SZREG 8 |
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| 26 | # define REG_S sd |
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| 27 | # define REG_L ld |
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| 28 | #elif __riscv_xlen == 32 |
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| 29 | # define PTRLOG 2 |
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| 30 | # define SZREG 4 |
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| 31 | # define REG_S sw |
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| 32 | # define REG_L lw |
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| 33 | #else |
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| 34 | # error __riscv_xlen must equal 32 or 64 |
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| 35 | #endif |
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| 36 | |
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| 37 | #if !defined __riscv_float_abi_soft |
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| 38 | /* For ABI uniformity, reserve 8 bytes for floats, even if double-precision |
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| 39 | floating-point is not supported in hardware. */ |
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| 40 | # if defined __riscv_float_abi_double |
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| 41 | # define FREG_L fld |
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| 42 | # define FREG_S fsd |
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| 43 | # define SZFREG 8 |
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| 44 | # else |
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| 45 | # error unsupported FLEN |
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| 46 | # endif |
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| 47 | #endif |
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| 48 | |
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| 49 | /* Declare leaf routine. */ |
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| 50 | #define LEAF(symbol) \ |
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| 51 | .globl symbol; \ |
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| 52 | .align 2; \ |
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| 53 | .type symbol,@function; \ |
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| 54 | symbol: \ |
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| 55 | cfi_startproc; |
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| 56 | |
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| 57 | /* Mark end of function. */ |
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| 58 | #undef END |
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| 59 | #define END(function) \ |
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| 60 | cfi_endproc; \ |
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| 61 | .size function,.-function |
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| 62 | |
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| 63 | /* Stack alignment. */ |
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| 64 | #define ALMASK ~15 |
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| 65 | |
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| 66 | #endif /* sys/asm.h */ |
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| 67 | |
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