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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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