2 * Copyright (c) 2015 Imagination Technologies Ltd
4 * This file is part of FFmpeg.
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.
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.
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
23 * MIPS assembly defines from sys/asm.h but rewritten for use with C inline
24 * assembly (rather than from within .s files).
27 #ifndef AVUTIL_MIPS_ASMDEFS_H
28 #define AVUTIL_MIPS_ASMDEFS_H
30 #if defined(_ABI64) && _MIPS_SIM == _ABI64
31 # define mips_reg int64_t
32 # define PTRSIZE " 8 "
34 # define PTR_ADDU "daddu "
35 # define PTR_ADDIU "daddiu "
36 # define PTR_ADDI "daddi "
37 # define PTR_SUBU "dsubu "
40 # define PTR_SRA "dsra "
41 # define PTR_SRL "dsrl "
42 # define PTR_SLL "dsll "
44 # define mips_reg int32_t
45 # define PTRSIZE " 4 "
47 # define PTR_ADDU "addu "
48 # define PTR_ADDIU "addiu "
49 # define PTR_ADDI "addi "
50 # define PTR_SUBU "subu "
53 # define PTR_SRA "sra "
54 # define PTR_SRL "srl "
55 # define PTR_SLL "sll "
59 * parse_r var, r - Helper assembler macro for parsing register names.
61 * This converts the register name in $n form provided in \r to the
62 * corresponding register number, which is assigned to the variable \var. It is
63 * needed to allow explicit encoding of instructions in inline assembly where
64 * registers are chosen by the compiler in $n form, allowing us to avoid using
65 * fixed register numbers.
67 * It also allows newer instructions (not implemented by the assembler) to be
68 * transparently implemented using assembler macros, instead of needing separate
69 * cases depending on toolchain support.
71 * Simple usage example:
72 * __asm__ __volatile__("parse_r __rt, %0\n\t"
75 * ".word (0x41606000 | (__rt << 16))"
79 /* Match an individual register number and assign to \var */
81 ".ifc \\r, $" #n "\n\t" \
82 "\\var = " #n "\n\t" \
85 __asm__(".macro parse_r var r\n\t"
87 _IFC_REG(0) _IFC_REG(1) _IFC_REG(2) _IFC_REG(3)
88 _IFC_REG(4) _IFC_REG(5) _IFC_REG(6) _IFC_REG(7)
89 _IFC_REG(8) _IFC_REG(9) _IFC_REG(10) _IFC_REG(11)
90 _IFC_REG(12) _IFC_REG(13) _IFC_REG(14) _IFC_REG(15)
91 _IFC_REG(16) _IFC_REG(17) _IFC_REG(18) _IFC_REG(19)
92 _IFC_REG(20) _IFC_REG(21) _IFC_REG(22) _IFC_REG(23)
93 _IFC_REG(24) _IFC_REG(25) _IFC_REG(26) _IFC_REG(27)
94 _IFC_REG(28) _IFC_REG(29) _IFC_REG(30) _IFC_REG(31)
96 ".error \"Unable to parse register name \\r\"\n\t"
100 #endif /* AVCODEC_MIPS_ASMDEFS_H */