035b443093
arch/mips/isa/bitfields.def:
Add comment, move definition up in file
arch/mips/isa/decoder.def:
add basic arithmetic operations
arch/mips/isa/formats/fp.format:
change Integer -> FP words
arch/mips/isa/formats/int.format:
Add derived IntImm class
arch/mips/isa/operands.def:
change to MIPS sytle operands
--HG--
rename : arch/mips/isa/formats/fpop.format => arch/mips/isa/formats/fp.format
rename : arch/mips/isa/formats/integerop.format => arch/mips/isa/formats/int.format
extra : convert_revision : a95da47bc981e56a9898421da4eeb9c442d1dc15
52 lines
1.1 KiB
Modula-2
52 lines
1.1 KiB
Modula-2
////////////////////////////////////////////////////////////////////
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//
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// Bitfield definitions.
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//
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def bitfield OPCODE_HI <31:29>;
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def bitfield OPCODE_LO <28:26>;
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def bitfield FUNCTION_HI < 5: 3>;
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def bitfield FUNCTION_LO < 2: 0>;
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// Integer operate format
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def bitfield RT <20:16>;
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def bitfield RT_HI <20:19>;
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def bitfield RT_LO <18:16>;
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def bitfield RS <25:21>;
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def bitfield RS_HI <25:24>;
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def bitfield RS_LO <23:21>;
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def bitfield RD <15:11>;
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def bitfield INTIMM <15: 0>; // integer immediate (literal)
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// Floating-point operate format
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def bitfield FMT <25:21>;
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def bitfield FT <20:16>;
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def bitfield FS <15:11>;
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def bitfield FD <10:6>;
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def bitfield MOVCI <16:16>;
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def bitfield MOVCF <16:16>;
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def bitfield SRL <21:21>;
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def bitfield SRLV < 6: 6>;
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def bitfield SA <10: 6>;
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// Interrupts
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def bitfield SC < 5: 5>;
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// Branch format
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def bitfield OFFSET <15: 0>; // displacement
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// Memory-format jumps
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def bitfield JMPTARG <25: 0>;
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def bitfield JMPHINT <10: 6>;
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def bitfield SYSCALLCODE <25: 6>;
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def bitfield TRAPCODE <15:13>;
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// M5 instructions
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def bitfield M5FUNC <7:0>;
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