Adding Zcb implementation #322
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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) 2017-2023 */ | ||
| /* 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 */ | ||
| /* Nambi JU */ | ||
| /* */ | ||
| /* 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. */ | ||
| /*=======================================================================================*/ | ||
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| /* ****************************************************************** */ | ||
| /* This file specifies the instructions in the 'ZCEE' extension. */ | ||
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There was a problem hiding this comment. Should this say Zcb not ZCEE? |
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| /* ****************************************************************** */ | ||
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| /* ------------------------------------------------------------------ */ | ||
| /* Sail Model for the c.l and c.s encoding group */ | ||
| /* ------------------------------------------------------------------ */ | ||
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| /* ****************************************************************** */ | ||
| union clause ast = C_LBU : (bits(2), cregidx, cregidx) | ||
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| mapping clause encdec_compressed = C_LBU(ui65, rs1, rd) | ||
| <-> 0b100 @ 0b000 @ rs1 : cregidx @ ui65 : bits(2) @ rd : cregidx @ 0b00 | ||
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| function clause execute (C_LBU(uimm, rsc, rdc)) = { | ||
| let immext : xlenbits = zero_extend(uimm); | ||
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| let imm : bits(12) = zero_extend(uimm); | ||
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There was a problem hiding this comment. I think this is wrong. The There was a problem hiding this comment. Swizzle the bits in decode not execute |
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| let rd = creg2reg_idx(rdc); | ||
| let rs = creg2reg_idx(rsc); | ||
| execute(LOAD(imm, rs, rd, true, BYTE, false, false)) | ||
| } | ||
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| mapping clause assembly = C_LBU(uimm, rsc, rdc) | ||
| <-> "c.lbu" ^ spc() ^ creg_name(rdc) ^ sep() ^ creg_name(rsc) ^ sep() ^ hex_bits_5(uimm @ 0b000) | ||
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| /* ****************************************************************** */ | ||
| union clause ast = C_LHU : (bits(1), cregidx, cregidx) | ||
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| mapping clause encdec_compressed = C_LHU(ui5, rs1, rd) | ||
| <-> 0b100 @ 0b001 @ rs1 : cregidx @ 0b0 @ ui5 : bits(1) @ rd : cregidx @ 0b00 | ||
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| function clause execute (C_LHU(uimm, rsc, rdc)) = { | ||
| let immext : xlenbits = zero_extend(uimm); | ||
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There was a problem hiding this comment. Also unused. Please check the other instructions too. |
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| let imm : bits(12) = zero_extend(uimm); | ||
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There was a problem hiding this comment. Also wrong - should be Please check the other instructions too. |
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| let rd = creg2reg_idx(rdc); | ||
| let rs = creg2reg_idx(rsc); | ||
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| execute(LOAD(imm, rs, rd, true, HALF, false, false)) | ||
| } | ||
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| mapping clause assembly = C_LHU(uimm, rsc, rdc) | ||
| <-> "c.lhu" ^ spc() ^ creg_name(rdc) ^ sep() ^ creg_name(rsc) ^ sep() ^ hex_bits_4(uimm @ 0b000) | ||
| /* ****************************************************************** */ | ||
| union clause ast = C_LH : (bits(1), cregidx, cregidx) | ||
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| mapping clause encdec_compressed = C_LH(ui5, rs1, rd) | ||
| <-> 0b100 @ 0b001 @ rs1 : cregidx @ 0b1 @ ui5 : bits(1) @ rd : cregidx @ 0b00 | ||
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| function clause execute (C_LH(uimm, rsc, rdc)) = { | ||
| let immext : xlenbits = zero_extend(uimm); | ||
| let imm : bits(12) = zero_extend(uimm); | ||
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| let rd = creg2reg_idx(rdc); | ||
| let rs = creg2reg_idx(rsc); | ||
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| let rsext = X(rs) + immext; | ||
| X(rs) = rsext; | ||
| execute(LOAD(imm, rs, rd, false, HALF, false, false)) | ||
| } | ||
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| mapping clause assembly = C_LH(uimm, rsc, rdc) | ||
| <-> "c.lh" ^ spc() ^ creg_name(rdc) ^ sep() ^ creg_name(rsc) ^ sep() ^ hex_bits_4(uimm @ 0b000) | ||
| /* ****************************************************************** */ | ||
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| union clause ast = C_SB : (bits(2), cregidx, cregidx) | ||
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| mapping clause encdec_compressed = C_SB(ui65, rs1, rs2) | ||
| <-> 0b100 @ 0b010 @ rs1 : cregidx @ ui65 : bits(2) @ rs2 : cregidx @ 0b00 | ||
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| function clause execute (C_SB(uimm, rs1c, rs2c)) = { | ||
| let immext : xlenbits = zero_extend(uimm); | ||
| let imm : bits(12) = zero_extend(uimm); | ||
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| let rs1c = creg2reg_idx(rs1c); | ||
| let rs2c = creg2reg_idx(rs2c); | ||
| execute(STORE(imm, rs2c, rs1c, BYTE, false, false)) | ||
| } | ||
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| mapping clause assembly = C_SB(uimm, rs1, rs2) | ||
| <-> "c.sb" ^ spc() ^ creg_name(rs2) ^ sep() ^ creg_name(rs1) ^ sep() ^ hex_bits_5(uimm @ 0b000) | ||
| /* ****************************************************************** */ | ||
| union clause ast = C_SH : (bits(1), cregidx, cregidx) | ||
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| mapping clause encdec_compressed = C_SH(ui5, rs1, rs2) | ||
| <-> 0b100 @ 0b011 @ rs1 : cregidx @ 0b0 @ ui5 : bits(1) @ rs2 : cregidx @ 0b00 | ||
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| function clause execute (C_SH(uimm, rs1c, rs2c)) = { | ||
| let immext : xlenbits = zero_extend(uimm); | ||
| let imm : bits(12) = zero_extend(uimm); | ||
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| let rs2c = creg2reg_idx(rs2c); | ||
| let rs1c = creg2reg_idx(rs1c); | ||
| execute(STORE(imm, rs2c, rs1c, HALF, false, false)) | ||
| } | ||
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| mapping clause assembly = C_SH(uimm, rs1, rs2) | ||
| <-> "c.sh" ^ spc() ^ creg_name(rs2) ^ sep() ^ creg_name(rs1) ^ sep() ^ hex_bits_4(uimm @ 0b000) | ||
| /* ****************************************************************** */ | ||
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| /* ------------------------------------------------------------------ */ | ||
| /* Sail Model for the c.zext and c.sext encoding group */ | ||
| /* ------------------------------------------------------------------ */ | ||
| /* ****************************************************************** */ | ||
| union clause ast = C_ZEXT_B : (cregidx) | ||
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| mapping clause encdec_compressed = C_ZEXT_B(rsd) | ||
| <-> 0b100 @ 0b111 @ rsd : cregidx @ 0b11 @ 0b000 @ 0b01 | ||
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| function clause execute (C_ZEXT_B(rsd)) = { | ||
| let rsdc = creg2reg_idx(rsd); | ||
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| X(rsdc) = zero_extend(X(rsdc)[7..0]); | ||
| RETIRE_SUCCESS | ||
| } | ||
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| mapping clause assembly = C_ZEXT_B(rsd) | ||
| <-> "c.zext.b" ^ spc() ^ creg_name(rsd) | ||
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| /* ****************************************************************** */ | ||
| union clause ast = C_SEXT_B : (cregidx) | ||
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| mapping clause encdec_compressed = C_SEXT_B(rsd) | ||
| <-> 0b100 @ 0b111 @ rsd : cregidx @ 0b11 @ 0b001 @ 0b01 | ||
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| function clause execute (C_SEXT_B(rsd)) = { | ||
| let rsdc = creg2reg_idx(rsd); | ||
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| X(rsdc) = sign_extend(X(rsdc)[7..0]); | ||
| RETIRE_SUCCESS | ||
| } | ||
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| mapping clause assembly = C_SEXT_B(rsd) | ||
| <-> "c.sext.b" ^ spc() ^ creg_name(rsd) | ||
| /* ****************************************************************** */ | ||
| union clause ast = C_ZEXT_H : (cregidx) | ||
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| mapping clause encdec_compressed = C_ZEXT_H(rsd) | ||
| <-> 0b100 @ 0b111 @ rsd : cregidx @ 0b11 @ 0b010 @ 0b01 | ||
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| function clause execute (C_ZEXT_H(rsd)) = { | ||
| let rsdc = creg2reg_idx(rsd); | ||
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| X(rsdc) = zero_extend(X(rsdc)[15..0]); | ||
| RETIRE_SUCCESS | ||
| } | ||
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| mapping clause assembly = C_ZEXT_H(rsd) | ||
| <-> "c.zext.h" ^ spc() ^ creg_name(rsd) | ||
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| /* ****************************************************************** */ | ||
| union clause ast = C_SEXT_H : (cregidx) | ||
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| mapping clause encdec_compressed = C_SEXT_H(rsd) | ||
| <-> 0b100 @ 0b111 @ rsd : cregidx @ 0b11 @ 0b011 @ 0b01 | ||
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| function clause execute (C_SEXT_H(rsd)) = { | ||
| let rsdc = creg2reg_idx(rsd); | ||
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| X(rsdc) = sign_extend(X(rsdc)[15..0]); | ||
| RETIRE_SUCCESS | ||
| } | ||
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| mapping clause assembly = C_SEXT_H(rsd) | ||
| <-> "c.sext.h" ^ spc() ^ creg_name(rsd) | ||
| /* ****************************************************************** */ | ||
| union clause ast = C_ZEXT_W : (cregidx) | ||
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| mapping clause encdec_compressed = C_ZEXT_W(rsd) | ||
| <-> 0b100 @ 0b111 @ rsd : cregidx @ 0b11 @ 0b100 @ 0b01 | ||
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| function clause execute (C_ZEXT_W(rsd)) = { | ||
| let rsdc = creg2reg_idx(rsd); | ||
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| X(rsdc) = zero_extend(X(rsdc)[31..0]); | ||
| RETIRE_SUCCESS | ||
| } | ||
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| mapping clause assembly = C_ZEXT_W(rsd) | ||
| <-> "c.zext.w" ^ spc() ^ creg_name(rsd) | ||
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| /* ****************************************************************** */ | ||
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| /* ------------------------------------------------------------------ */ | ||
| /* Sail Model for the c.mul encoding group */ | ||
| /* ------------------------------------------------------------------ */ | ||
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| /* the assembly abstract syntax tree (AST) clause for the CMUL instructions */ | ||
| union clause ast = C_MUL : (cregidx,cregidx) | ||
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| /* the encode/decode mapping between AST elements and 16-bit half words */ | ||
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| mapping clause encdec_compressed = C_MUL(rsd, rs2) | ||
| <-> 0b100 @ 0b111 @ rsd : cregidx @ 0b00 @ rs2 : cregidx @ 0b01 | ||
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| function clause execute (C_MUL(rsd,rs2)) = { | ||
| let rd = creg2reg_idx(rsd); | ||
| let rs = creg2reg_idx(rs2); | ||
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| let result_wide = to_bits(2 * sizeof(xlen), signed(X(rd)) * signed(X(rs))); | ||
| X(rd) = result_wide[(sizeof(xlen) - 1) .. 0]; | ||
| RETIRE_SUCCESS | ||
| } | ||
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| mapping clause assembly = C_MUL(rsd, rs2) <-> | ||
| "c.mul" ^ spc() ^ creg_name(rsd) ^ spc() ^ creg_name(rs2) | ||
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| /* ------------------------------------------------------------------ */ | ||
| /* Sail Model for the c.not encoding group */ | ||
| /* ------------------------------------------------------------------ */ | ||
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| /* the assembly abstract syntax tree (AST) clause for the CNOT instructions */ | ||
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| union clause ast = C_NOT : (cregidx) | ||
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| /* the encode/decode mapping between AST elements and 16-bit half words */ | ||
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| mapping clause encdec_compressed = C_NOT(rsd) | ||
| <-> 0b100 @ 0b111 @ rsd : cregidx @ 0b11 @ 0b101 @ 0b01 | ||
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| function clause execute (C_NOT(rsd)) = { | ||
| let rsd = creg2reg_idx(rsd); | ||
| X(rsd) = ~(X(rsd)); | ||
| RETIRE_SUCCESS | ||
| } | ||
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| mapping clause assembly = C_NOT(rsd) <-> | ||
| "c.not" ^ spc() ^ creg_name(rsd) | ||
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Oh and this is removing vector, resolve conflicts accept all mine ?