bitfields.isa revision 2124
1// -*- mode:c++ -*- 2 3//////////////////////////////////////////////////////////////////// 4// 5// Bitfield definitions. 6// 7 8def bitfield OPCODE_HI <31:29>; 9def bitfield OPCODE_LO <28:26>; 10 11def bitfield FUNCTION_HI < 5: 3>; 12def bitfield FUNCTION_LO < 2: 0>; 13 14// Integer operate format 15def bitfield RT <20:16>; 16def bitfield RT_HI <20:19>; 17def bitfield RT_LO <18:16>; 18 19def bitfield RS <25:21>; 20def bitfield RS_MSB <25:25>; 21def bitfield RS_HI <25:24>; 22def bitfield RS_LO <23:21>; 23 24def bitfield RD <15:11>; 25 26def bitfield INTIMM <15: 0>; // integer immediate (literal) 27 28// Floating-point operate format 29def bitfield FMT <25:21>; 30def bitfield FT <20:16>; 31def bitfield FS <15:11>; 32def bitfield FD <10:6>; 33 34def bitfield MOVCI <16:16>; 35def bitfield MOVCF <16:16>; 36def bitfield SRL <21:21>; 37def bitfield SRLV < 6: 6>; 38def bitfield SA <10: 6>; 39 40// Interrupts 41def bitfield SC < 5: 5>; 42 43// Branch format 44def bitfield OFFSET <15: 0>; // displacement 45 46// Jmp format 47def bitfield JMPTARG <25: 0>; 48def bitfield JMPHINT <10: 6>; 49 50def bitfield SYSCALLCODE <25: 6>; 51def bitfield TRAPCODE <15:13>; 52 53// M5 instructions 54def bitfield M5FUNC <7:0>; 55