1 /* Copyright (c) 2017 SiFive Inc. All rights reserved. 2 3 This copyrighted material is made available to anyone wishing to use, 4 modify, copy, or redistribute it subject to the terms and conditions 5 of the FreeBSD License. This program is distributed in the hope that 6 it will be useful, but WITHOUT ANY WARRANTY expressed or implied, 7 including the implied warranties of MERCHANTABILITY or FITNESS FOR 8 A PARTICULAR PURPOSE. A copy of this license is available at 9 http://www.opensource.org/licenses. 10 */ 11 12 #ifndef _SYS_ASM_H 13 #define _SYS_ASM_H 14 15 /* 16 * Macros to handle different pointer/register sizes for 32/64-bit code 17 */ 18 #if __riscv_xlen == 64 19 # define PTRLOG 3 20 # define SZREG 8 21 # define REG_S sd 22 # define REG_L ld 23 #elif __riscv_xlen == 32 24 # define PTRLOG 2 25 # define SZREG 4 26 # define REG_S sw 27 # define REG_L lw 28 #else 29 # error __riscv_xlen must equal 32 or 64 30 #endif 31 32 #ifndef __riscv_float_abi_soft 33 /* For ABI uniformity, reserve 8 bytes for floats, even if double-precision 34 floating-point is not supported in hardware. */ 35 # define SZFREG 8 36 # ifdef __riscv_float_abi_single 37 # define FREG_L flw 38 # define FREG_S fsw 39 # elif defined(__riscv_float_abi_double) 40 # define FREG_L fld 41 # define FREG_S fsd 42 # elif defined(__riscv_float_abi_quad) 43 # define FREG_L flq 44 # define FREG_S fsq 45 # else 46 # error unsupported FLEN 47 # endif 48 #endif 49 50 #endif /* sys/asm.h */ 51