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108 lines
3.7 KiB
108 lines
3.7 KiB
/* |
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* Copyright (c) 2015 Imagination Technologies Ltd |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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/** |
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* @file |
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* MIPS assembly defines from sys/asm.h but rewritten for use with C inline |
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* assembly (rather than from within .s files). |
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*/ |
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#ifndef AVUTIL_MIPS_ASMDEFS_H |
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#define AVUTIL_MIPS_ASMDEFS_H |
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#include <stdint.h> |
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#if defined(_ABI64) && _MIPS_SIM == _ABI64 |
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# define mips_reg int64_t |
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# define PTRSIZE " 8 " |
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# define PTRLOG " 3 " |
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# define PTR_ADDU "daddu " |
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# define PTR_ADDIU "daddiu " |
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# define PTR_ADDI "daddi " |
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# define PTR_SUBU "dsubu " |
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# define PTR_L "ld " |
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# define PTR_S "sd " |
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# define PTR_SRA "dsra " |
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# define PTR_SRL "dsrl " |
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# define PTR_SLL "dsll " |
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#else |
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# define mips_reg int32_t |
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# define PTRSIZE " 4 " |
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# define PTRLOG " 2 " |
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# define PTR_ADDU "addu " |
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# define PTR_ADDIU "addiu " |
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# define PTR_ADDI "addi " |
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# define PTR_SUBU "subu " |
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# define PTR_L "lw " |
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# define PTR_S "sw " |
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# define PTR_SRA "sra " |
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# define PTR_SRL "srl " |
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# define PTR_SLL "sll " |
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#endif |
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/* |
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* parse_r var, r - Helper assembler macro for parsing register names. |
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* |
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* This converts the register name in $n form provided in \r to the |
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* corresponding register number, which is assigned to the variable \var. It is |
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* needed to allow explicit encoding of instructions in inline assembly where |
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* registers are chosen by the compiler in $n form, allowing us to avoid using |
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* fixed register numbers. |
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* |
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* It also allows newer instructions (not implemented by the assembler) to be |
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* transparently implemented using assembler macros, instead of needing separate |
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* cases depending on toolchain support. |
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* |
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* Simple usage example: |
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* __asm__ __volatile__("parse_r __rt, %0\n\t" |
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* ".insn\n\t" |
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* "# di %0\n\t" |
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* ".word (0x41606000 | (__rt << 16))" |
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* : "=r" (status); |
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*/ |
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/* Match an individual register number and assign to \var */ |
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#define _IFC_REG(n) \ |
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".ifc \\r, $" #n "\n\t" \ |
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"\\var = " #n "\n\t" \ |
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".endif\n\t" |
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__asm__(".macro parse_r var r\n\t" |
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"\\var = -1\n\t" |
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_IFC_REG(0) _IFC_REG(1) _IFC_REG(2) _IFC_REG(3) |
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_IFC_REG(4) _IFC_REG(5) _IFC_REG(6) _IFC_REG(7) |
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_IFC_REG(8) _IFC_REG(9) _IFC_REG(10) _IFC_REG(11) |
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_IFC_REG(12) _IFC_REG(13) _IFC_REG(14) _IFC_REG(15) |
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_IFC_REG(16) _IFC_REG(17) _IFC_REG(18) _IFC_REG(19) |
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_IFC_REG(20) _IFC_REG(21) _IFC_REG(22) _IFC_REG(23) |
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_IFC_REG(24) _IFC_REG(25) _IFC_REG(26) _IFC_REG(27) |
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_IFC_REG(28) _IFC_REG(29) _IFC_REG(30) _IFC_REG(31) |
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".iflt \\var\n\t" |
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".error \"Unable to parse register name \\r\"\n\t" |
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".endif\n\t" |
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".endm"); |
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/* General union structure for clang adaption */ |
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union mmi_intfloat64 { |
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int64_t i; |
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double f; |
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}; |
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#endif /* AVCODEC_MIPS_ASMDEFS_H */
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