09c2d08c
 Hu Chunming
arm交付版
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/*
* Copyright (c) 2015 Imagination Technologies Ltd
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* MIPS assembly defines from sys/asm.h but rewritten for use with C inline
* assembly (rather than from within .s files).
*/
#ifndef AVUTIL_MIPS_ASMDEFS_H
#define AVUTIL_MIPS_ASMDEFS_H
#if defined(_ABI64) && _MIPS_SIM == _ABI64
# define mips_reg int64_t
# define PTRSIZE " 8 "
# define PTRLOG " 3 "
# define PTR_ADDU "daddu "
# define PTR_ADDIU "daddiu "
# define PTR_ADDI "daddi "
# define PTR_SUBU "dsubu "
# define PTR_L "ld "
# define PTR_S "sd "
# define PTR_SRA "dsra "
# define PTR_SRL "dsrl "
# define PTR_SLL "dsll "
#else
# define mips_reg int32_t
# define PTRSIZE " 4 "
# define PTRLOG " 2 "
# define PTR_ADDU "addu "
# define PTR_ADDIU "addiu "
# define PTR_ADDI "addi "
# define PTR_SUBU "subu "
# define PTR_L "lw "
# define PTR_S "sw "
# define PTR_SRA "sra "
# define PTR_SRL "srl "
# define PTR_SLL "sll "
#endif
/*
* parse_r var, r - Helper assembler macro for parsing register names.
*
* This converts the register name in $n form provided in \r to the
* corresponding register number, which is assigned to the variable \var. It is
* needed to allow explicit encoding of instructions in inline assembly where
* registers are chosen by the compiler in $n form, allowing us to avoid using
* fixed register numbers.
*
* It also allows newer instructions (not implemented by the assembler) to be
* transparently implemented using assembler macros, instead of needing separate
* cases depending on toolchain support.
*
* Simple usage example:
* __asm__ __volatile__("parse_r __rt, %0\n\t"
* ".insn\n\t"
* "# di %0\n\t"
* ".word (0x41606000 | (__rt << 16))"
* : "=r" (status);
*/
/* Match an individual register number and assign to \var */
#define _IFC_REG(n) \
".ifc \\r, $" #n "\n\t" \
"\\var = " #n "\n\t" \
".endif\n\t"
__asm__(".macro parse_r var r\n\t"
"\\var = -1\n\t"
_IFC_REG(0) _IFC_REG(1) _IFC_REG(2) _IFC_REG(3)
_IFC_REG(4) _IFC_REG(5) _IFC_REG(6) _IFC_REG(7)
_IFC_REG(8) _IFC_REG(9) _IFC_REG(10) _IFC_REG(11)
_IFC_REG(12) _IFC_REG(13) _IFC_REG(14) _IFC_REG(15)
_IFC_REG(16) _IFC_REG(17) _IFC_REG(18) _IFC_REG(19)
_IFC_REG(20) _IFC_REG(21) _IFC_REG(22) _IFC_REG(23)
_IFC_REG(24) _IFC_REG(25) _IFC_REG(26) _IFC_REG(27)
_IFC_REG(28) _IFC_REG(29) _IFC_REG(30) _IFC_REG(31)
".iflt \\var\n\t"
".error \"Unable to parse register name \\r\"\n\t"
".endif\n\t"
".endm");
#endif /* AVCODEC_MIPS_ASMDEFS_H */
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