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riscv_insts_cfext.sail
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/*=======================================================================================*/
/* RISCV Sail Model */
/* */
/* This Sail RISC-V architecture model, comprising all files and */
/* directories except for the snapshots of the Lem and Sail libraries */
/* in the prover_snapshots directory (which include copies of their */
/* licences), is subject to the BSD two-clause licence below. */
/* */
/* Copyright (c) 2017-2021 */
/* Prashanth Mundkur */
/* Rishiyur S. Nikhil and Bluespec, Inc. */
/* Jon French */
/* Brian Campbell */
/* Robert Norton-Wright */
/* Alasdair Armstrong */
/* Thomas Bauereiss */
/* Shaked Flur */
/* Christopher Pulte */
/* Peter Sewell */
/* Alexander Richardson */
/* Hesham Almatary */
/* Jessica Clarke */
/* Microsoft, for contributions by Robert Norton-Wright and Nathaniel Wesley Filardo */
/* Peter Rugg */
/* Aril Computer Corp., for contributions by Scott Johnson */
/* */
/* All rights reserved. */
/* */
/* This software was developed by the above within the Rigorous */
/* Engineering of Mainstream Systems (REMS) project, partly funded by */
/* EPSRC grant EP/K008528/1, at the Universities of Cambridge and */
/* Edinburgh. */
/* */
/* This software was developed by SRI International and the University of */
/* Cambridge Computer Laboratory (Department of Computer Science and */
/* Technology) under DARPA/AFRL contract FA8650-18-C-7809 ("CIFV"), and */
/* under DARPA contract HR0011-18-C-0016 ("ECATS") as part of the DARPA */
/* SSITH research programme. */
/* */
/* This project has received funding from the European Research Council */
/* (ERC) under the European Union’s Horizon 2020 research and innovation */
/* programme (grant agreement 789108, ELVER). */
/* */
/* */
/* Redistribution and use in source and binary forms, with or without */
/* modification, are permitted provided that the following conditions */
/* are met: */
/* 1. Redistributions of source code must retain the above copyright */
/* notice, this list of conditions and the following disclaimer. */
/* 2. 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. */
/* */
/* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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. */
/*=======================================================================================*/
/* ********************************************************************* */
/* This file specifies the compressed floating-point instructions.
*
* These instructions are only legal if misa.C() and misa.F()
* are set.
*/
/* ****************************************************************** */
union clause ast = C_FLWSP : (bits(6), regidx)
mapping clause encdec_compressed = C_FLWSP(ui76 @ ui5 @ ui42, rd)
if sizeof(xlen) == 32 & haveRVC() & haveFExt()
<-> 0b011 @ ui5 : bits(1) @ rd : regidx @ ui42 : bits(3) @ ui76 : bits(2) @ 0b10
if sizeof(xlen) == 32 & haveRVC() & haveFExt()
function clause execute (C_FLWSP(imm, rd)) = {
let imm : bits(12) = EXTZ(imm @ 0b00);
execute(LOAD_FP(imm, sp, rd, WORD))
}
mapping clause assembly = C_FLWSP(imm, rd)
if sizeof(xlen) == 32
<-> "c.flwsp" ^ spc() ^ reg_name(rd) ^ sep() ^ hex_bits_6(imm)
if sizeof(xlen) == 32
/* ****************************************************************** */
union clause ast = C_FSWSP : (bits(6), regidx)
mapping clause encdec_compressed = C_FSWSP(ui76 @ ui52, rs2)
if sizeof(xlen) == 32 & haveRVC() & haveFExt()
<-> 0b111 @ ui52 : bits(4) @ ui76 : bits(2) @ rs2 : regidx @ 0b10
if sizeof(xlen) == 32 & haveRVC() & haveFExt()
function clause execute (C_FSWSP(uimm, rs2)) = {
let imm : bits(12) = EXTZ(uimm @ 0b00);
execute(STORE_FP(imm, rs2, sp, WORD))
}
mapping clause assembly = C_FSWSP(uimm, rd)
if sizeof(xlen) == 32
<-> "c.fswsp" ^ spc() ^ reg_name(rd) ^ sep() ^ hex_bits_6(uimm)
if sizeof(xlen) == 32
/* ****************************************************************** */
union clause ast = C_FLW : (bits(5), cregidx, cregidx)
mapping clause encdec_compressed = C_FLW(ui6 @ ui53 @ ui2, rs1, rd)
if sizeof(xlen) == 32 & haveRVC() & haveFExt()
<-> 0b011 @ ui53 : bits(3) @ rs1 : cregidx @ ui2 : bits(1) @ ui6 : bits(1) @ rd : cregidx @ 0b00
if sizeof(xlen) == 32 & haveRVC() & haveFExt()
function clause execute (C_FLW(uimm, rsc, rdc)) = {
let imm : bits(12) = EXTZ(uimm @ 0b00);
let rd = creg2reg_idx(rdc);
let rs = creg2reg_idx(rsc);
execute(LOAD_FP(imm, rs, rd, WORD))
}
mapping clause assembly = C_FLW(uimm, rsc, rdc)
if sizeof(xlen) == 32
<-> "c.flw" ^ spc() ^ creg_name(rdc) ^ sep() ^ creg_name(rsc) ^ sep() ^ hex_bits_7(uimm @ 0b00)
if sizeof(xlen) == 32
/* ****************************************************************** */
union clause ast = C_FSW : (bits(5), cregidx, cregidx)
mapping clause encdec_compressed = C_FSW(ui6 @ ui53 @ ui2, rs1, rs2)
if sizeof(xlen) == 32 & haveRVC() & haveFExt()
<-> 0b111 @ ui53 : bits(3) @ rs1 : cregidx @ ui2 : bits(1) @ ui6 : bits(1) @ rs2 : cregidx @ 0b00
if sizeof(xlen) == 32 & haveRVC() & haveFExt()
function clause execute (C_FSW(uimm, rsc1, rsc2)) = {
let imm : bits(12) = EXTZ(uimm @ 0b00);
let rs1 = creg2reg_idx(rsc1);
let rs2 = creg2reg_idx(rsc2);
execute(STORE_FP(imm, rs2, rs1, WORD))
}
mapping clause assembly = C_FSW(uimm, rsc1, rsc2)
if sizeof(xlen) == 32
<-> "c.fsw" ^ spc() ^ creg_name(rsc1) ^ sep() ^ creg_name(rsc2) ^ sep() ^ hex_bits_7(uimm @ 0b00)
if sizeof(xlen) == 32