diff options
Diffstat (limited to 'src/arch/riscv/isa/bitfields.isa')
-rw-r--r-- | src/arch/riscv/isa/bitfields.isa | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/src/arch/riscv/isa/bitfields.isa b/src/arch/riscv/isa/bitfields.isa new file mode 100644 index 000000000..9a2184453 --- /dev/null +++ b/src/arch/riscv/isa/bitfields.isa @@ -0,0 +1,77 @@ +// -*- mode:c++ -*- + +// Copyright (c) 2015 RISC-V Foundation +// Copyright (c) 2016 The University of Virginia +// All rights reserved. +// +// Redistribution and use in source and binary forms, with or without +// modification, are permitted provided that the following conditions are +// met: redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer; +// redistributions in binary form must reproduce the above copyright +// notice, this list of conditions and the following disclaimer in the +// documentation and/or other materials provided with the distribution; +// neither the name of the copyright holders nor the names of its +// contributors may be used to endorse or promote products derived from +// this software without specific prior written permission. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +// +// Authors: Maxwell Walter +// Alec Roelke + +//////////////////////////////////////////////////////////////////// +// +// Bitfield definitions. +// + +def bitfield OPCODE <6:0>; +def bitfield NONOPCODE <31:7>; + +// R-Type +def bitfield ALL <31:0>; +def bitfield RD <11:7>; +def bitfield FUNCT3 <14:12>; +def bitfield RS1 <19:15>; +def bitfield RS2 <24:20>; +def bitfield FUNCT7 <31:25>; + +// Bit shifts +def bitfield SRTYPE <30>; +def bitfield SHAMT5 <24:20>; +def bitfield SHAMT6 <25:20>; + +// I-Type +def bitfield IMM12 <31:20>; + +// S-Type +def bitfield IMM5 <11:7>; +def bitfield IMM7 <31:25>; + +// U-Type +def bitfield IMM20 <31:12>; + +// SB-Type +def bitfield BIMM12BIT11 <7>; +def bitfield BIMM12BITS4TO1<11:8>; +def bitfield IMMSIGN <31>; +def bitfield BIMM12BITS10TO5 <30:25>; + +// UJ-Type +def bitfield UJIMMBITS10TO1 <30:21>; +def bitfield UJIMMBIT11 <20>; +def bitfield UJIMMBITS19TO12 <19:12>; + +// System +def bitfield FUNCT12 <31:20>; +def bitfield ZIMM <19:15>; |