d7ac2b56c2
arch/mips/isa/bitfields.isa:
extra bitfield for decoding
--HG--
extra : convert_revision : 27f0afc3ee6ce00a94f44b2b1ac160ec26030866
52 lines
1.2 KiB
Text
52 lines
1.2 KiB
Text
////////////////////////////////////////////////////////////////////
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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_MSB <25:25>;
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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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