1 /* Miscellaneous macros. 2 Copyright (C) 2000-2021 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 */