51 lines
1.3 KiB
C
51 lines
1.3 KiB
C
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/* Copyright (c) 2017 SiFive Inc. All rights reserved.
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This copyrighted material is made available to anyone wishing to use,
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modify, copy, or redistribute it subject to the terms and conditions
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of the FreeBSD License. This program is distributed in the hope that
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it will be useful, but WITHOUT ANY WARRANTY expressed or implied,
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including the implied warranties of MERCHANTABILITY or FITNESS FOR
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A PARTICULAR PURPOSE. A copy of this license is available at
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http://www.opensource.org/licenses.
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*/
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#ifndef _SYS_ASM_H
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#define _SYS_ASM_H
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/*
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* Macros to handle different pointer/register sizes for 32/64-bit code
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*/
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#if __riscv_xlen == 64
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# define PTRLOG 3
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# define SZREG 8
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# define REG_S sd
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# define REG_L ld
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#elif __riscv_xlen == 32
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# define PTRLOG 2
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# define SZREG 4
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# define REG_S sw
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# define REG_L lw
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#else
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# error __riscv_xlen must equal 32 or 64
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#endif
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#ifndef __riscv_float_abi_soft
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/* For ABI uniformity, reserve 8 bytes for floats, even if double-precision
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floating-point is not supported in hardware. */
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# define SZFREG 8
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# ifdef __riscv_float_abi_single
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# define FREG_L flw
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# define FREG_S fsw
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# elif defined(__riscv_float_abi_double)
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# define FREG_L fld
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# define FREG_S fsd
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# elif defined(__riscv_float_abi_quad)
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# define FREG_L flq
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# define FREG_S fsq
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# else
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# error unsupported FLEN
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# endif
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#endif
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#endif /* sys/asm.h */
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