mirror of https://git.ffmpeg.org/ffmpeg.git
101 lines
3.6 KiB
C
101 lines
3.6 KiB
C
/*
|
|
* 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 */
|