1 /* 2 * Copyright (c) 2015 Imagination Technologies Ltd 3 * 4 * This file is part of FFmpeg. 5 * 6 * FFmpeg is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Lesser General Public 8 * License as published by the Free Software Foundation; either 9 * version 2.1 of the License, or (at your option) any later version. 10 * 11 * FFmpeg is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Lesser General Public License for more details. 15 * 16 * You should have received a copy of the GNU Lesser General Public 17 * License along with FFmpeg; if not, write to the Free Software 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 19 */ 20 21 /** 22 * @file 23 * MIPS assembly defines from sys/asm.h but rewritten for use with C inline 24 * assembly (rather than from within .s files). 25 */ 26 27 #ifndef AVUTIL_MIPS_ASMDEFS_H 28 #define AVUTIL_MIPS_ASMDEFS_H 29 30 #include <stdint.h> 31 32 #if defined(_ABI64) && _MIPS_SIM == _ABI64 33 # define mips_reg int64_t 34 # define PTRSIZE " 8 " 35 # define PTRLOG " 3 " 36 # define PTR_ADDU "daddu " 37 # define PTR_ADDIU "daddiu " 38 # define PTR_ADDI "daddi " 39 # define PTR_SUBU "dsubu " 40 # define PTR_L "ld " 41 # define PTR_S "sd " 42 # define PTR_SRA "dsra " 43 # define PTR_SRL "dsrl " 44 # define PTR_SLL "dsll " 45 #else 46 # define mips_reg int32_t 47 # define PTRSIZE " 4 " 48 # define PTRLOG " 2 " 49 # define PTR_ADDU "addu " 50 # define PTR_ADDIU "addiu " 51 # define PTR_ADDI "addi " 52 # define PTR_SUBU "subu " 53 # define PTR_L "lw " 54 # define PTR_S "sw " 55 # define PTR_SRA "sra " 56 # define PTR_SRL "srl " 57 # define PTR_SLL "sll " 58 #endif 59 60 /* 61 * parse_r var, r - Helper assembler macro for parsing register names. 62 * 63 * This converts the register name in $n form provided in \r to the 64 * corresponding register number, which is assigned to the variable \var. It is 65 * needed to allow explicit encoding of instructions in inline assembly where 66 * registers are chosen by the compiler in $n form, allowing us to avoid using 67 * fixed register numbers. 68 * 69 * It also allows newer instructions (not implemented by the assembler) to be 70 * transparently implemented using assembler macros, instead of needing separate 71 * cases depending on toolchain support. 72 * 73 * Simple usage example: 74 * __asm__ __volatile__("parse_r __rt, %0\n\t" 75 * ".insn\n\t" 76 * "# di %0\n\t" 77 * ".word (0x41606000 | (__rt << 16))" 78 * : "=r" (status); 79 */ 80 81 /* Match an individual register number and assign to \var */ 82 #define _IFC_REG(n) \ 83 ".ifc \\r, $" #n "\n\t" \ 84 "\\var = " #n "\n\t" \ 85 ".endif\n\t" 86 87 __asm__(".macro parse_r var r\n\t" 88 "\\var = -1\n\t" 89 _IFC_REG(0) _IFC_REG(1) _IFC_REG(2) _IFC_REG(3) 90 _IFC_REG(4) _IFC_REG(5) _IFC_REG(6) _IFC_REG(7) 91 _IFC_REG(8) _IFC_REG(9) _IFC_REG(10) _IFC_REG(11) 92 _IFC_REG(12) _IFC_REG(13) _IFC_REG(14) _IFC_REG(15) 93 _IFC_REG(16) _IFC_REG(17) _IFC_REG(18) _IFC_REG(19) 94 _IFC_REG(20) _IFC_REG(21) _IFC_REG(22) _IFC_REG(23) 95 _IFC_REG(24) _IFC_REG(25) _IFC_REG(26) _IFC_REG(27) 96 _IFC_REG(28) _IFC_REG(29) _IFC_REG(30) _IFC_REG(31) 97 ".iflt \\var\n\t" 98 ".error \"Unable to parse register name \\r\"\n\t" 99 ".endif\n\t" 100 ".endm"); 101 102 /* General union structure for clang adaption */ 103 union mmi_intfloat64 { 104 int64_t i; 105 double f; 106 }; 107 108 #endif /* AVCODEC_MIPS_ASMDEFS_H */ 109