| /* |
| * 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 */ |
