> compile NEMU
ysyx_22040000 李心杨 Linux calcite 6.6.18 #1-NixOS SMP PREEMPT_DYNAMIC Fri Feb 23 08:25:28 UTC 2024 x86_64 GNU/Linux 21:48:13 up 2 days 1:16, 2 users, load average: 0.22, 0.16, 0.14
This commit is contained in:
tracer-ysyx
parent
6132f650af
commit
a9f2d6a56a
3 changed files with 69 additions and 35 deletions
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@ -1,17 +1,17 @@
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/***************************************************************************************
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* Copyright (c) 2014-2022 Zihao Yu, Nanjing University
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*
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* NEMU is licensed under Mulan PSL v2.
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* You can use this software according to the terms and conditions of the Mulan PSL v2.
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* You may obtain a copy of Mulan PSL v2 at:
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* http://license.coscl.org.cn/MulanPSL2
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*
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* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
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* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
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* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
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*
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* See the Mulan PSL v2 for more details.
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***************************************************************************************/
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* Copyright (c) 2014-2022 Zihao Yu, Nanjing University
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*
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* NEMU is licensed under Mulan PSL v2.
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* You can use this software according to the terms and conditions of the Mulan
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*PSL v2. You may obtain a copy of Mulan PSL v2 at:
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* http://license.coscl.org.cn/MulanPSL2
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*
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* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY
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*KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO
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*NON-INFRINGEMENT, MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
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*
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* See the Mulan PSL v2 for more details.
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***************************************************************************************/
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#include "common.h"
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#include "local-include/reg.h"
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@ -36,7 +36,8 @@ enum {
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#define immB() do { *imm = SEXT(BITS(i, 31, 31), 1) << 12 | BITS(i, 30, 25) << 5 | BITS(i, 11, 8) << 1 | BITS(i, 7, 7) << 11; } while(0)
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#define immJ() do { *imm = SEXT(BITS(i, 31, 31), 1) << 20 | BITS(i, 30, 21) << 1 | BITS(i, 20, 20) << 11 | BITS(i, 19, 12) << 12; } while(0)
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static void decode_operand(Decode *s, int *rd, word_t *src1, word_t *src2, word_t *imm, int type) {
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static void decode_operand(Decode *s, int *rd, word_t *src1, word_t *src2,
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word_t *imm, int type) {
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uint32_t i = s->isa.inst.val;
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int rs1 = BITS(i, 19, 15);
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int rs2 = BITS(i, 24, 20);
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@ -58,6 +59,21 @@ static void do_branch(Decode *s, bool condition, word_t offset) {
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}
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}
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// static word_t mulh(word_t src1, word_t src2) {
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// word_t split_width = (WORD_BYTES * 8 / 2);
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// word_t split_low_mask = (1u << split_width) - 1;
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// word_t src1_lo = src1 & split_low_mask;
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// word_t src1_hi = src1 >> split_width;
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// word_t src2_lo = src2 & split_low_mask;
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// word_t src2_hi = src2 >> split_width;
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// word_t carry_bit = ((src1_hi * src2_lo & split_low_mask) +
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// (src1_lo * src2_hi & split_low_mask) +
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// (src1_lo * src2_lo >> split_width)) >>
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// split_width;
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// return src1_hi * src2_hi + (src1_hi * src2_lo >> split_width) +
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// (src1_lo * src2_hi >> split_width) + carry_bit;
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// }
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static int decode_exec(Decode *s) {
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int rd = 0;
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word_t src1 = 0, src2 = 0, imm = 0;
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@ -73,14 +89,28 @@ static int decode_exec(Decode *s) {
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INSTPAT("??????? ????? ????? ??? ????? 01101 11", lui , U, R(rd) = imm);
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INSTPAT("??????? ????? ????? ??? ????? 00101 11", auipc , U, R(rd) = s->pc + imm);
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INSTPAT("??????? ????? ????? ??? ????? 11011 11", jal , J, do {s->dnpc = s->pc + imm; R(rd) = s->pc + 4; } while(0));
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INSTPAT("??????? ????? ????? ??? ????? 11001 11", jalr , I, do {s->dnpc = src1 + imm; R(rd) = s->pc + 4; } while(0));
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INSTPAT("??????? ????? ????? 000 ????? 11000 11", beq , B, do_branch(s, src1 == src2, imm));
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INSTPAT("??????? ????? ????? 001 ????? 11000 11", bne , B, do_branch(s, src1 != src2, imm));
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INSTPAT("??????? ????? ????? 100 ????? 11000 11", blt , B, do_branch(s, (sword_t)src1 < (sword_t)src2, imm));
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INSTPAT("??????? ????? ????? 101 ????? 11000 11", bge , B, do_branch(s, (sword_t)src1 >= (sword_t)src2, imm));
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INSTPAT("??????? ????? ????? 110 ????? 11000 11", bltu , B, do_branch(s, src1 < src2, imm));
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INSTPAT("??????? ????? ????? 111 ????? 11000 11", bgeu , B, do_branch(s, src1 >= src2, imm));
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INSTPAT(
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"??????? ????? ????? ??? ????? 11011 11", jal, J, do {
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s->dnpc = s->pc + imm;
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R(rd) = s->pc + 4;
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} while (0));
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INSTPAT(
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"??????? ????? ????? ??? ????? 11001 11", jalr, I, do {
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s->dnpc = src1 + imm;
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R(rd) = s->pc + 4;
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} while (0));
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INSTPAT("??????? ????? ????? 000 ????? 11000 11", beq, B,
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do_branch(s, src1 == src2, imm));
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INSTPAT("??????? ????? ????? 001 ????? 11000 11", bne, B,
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do_branch(s, src1 != src2, imm));
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INSTPAT("??????? ????? ????? 100 ????? 11000 11", blt, B,
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do_branch(s, (sword_t)src1 < (sword_t)src2, imm));
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INSTPAT("??????? ????? ????? 101 ????? 11000 11", bge, B,
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do_branch(s, (sword_t)src1 >= (sword_t)src2, imm));
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INSTPAT("??????? ????? ????? 110 ????? 11000 11", bltu, B,
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do_branch(s, src1 < src2, imm));
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INSTPAT("??????? ????? ????? 111 ????? 11000 11", bgeu, B,
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do_branch(s, src1 >= src2, imm));
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INSTPAT("??????? ????? ????? 000 ????? 00000 11", lb , I, R(rd) = SEXT(Mr(src1 + imm, 1), 8));
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INSTPAT("??????? ????? ????? 001 ????? 00000 11", lh , I, R(rd) = SEXT(Mr(src1 + imm, 2), 16));
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@ -101,20 +131,19 @@ static int decode_exec(Decode *s) {
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INSTPAT("0000000 ????? ????? 101 ????? 00100 11", srli , I, R(rd) = src1 >> imm);
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INSTPAT("0100000 ????? ????? 101 ????? 00100 11", srai , I, R(rd) = (sword_t)src1 >> (imm & 0x01F));
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INSTPAT("0000000 ????? ????? 000 ????? 01100 11", add , R, R(rd) = src1 + src2);
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INSTPAT("0100000 ????? ????? 000 ????? 01100 11", sub , R, R(rd) = src1 - src2);
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INSTPAT("0000000 ????? ????? 001 ????? 01100 11", sll , R, R(rd) = src1 << src2);
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INSTPAT("0000000 ????? ????? 010 ????? 01100 11", slt , R, R(rd) = (sword_t)src1 < (sword_t)src2 ? 1 : 0);
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INSTPAT("0000000 ????? ????? 011 ????? 01100 11", sltu , R, R(rd) = src1 < src2 ? 1 : 0);
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INSTPAT("0000000 ????? ????? 100 ????? 01100 11", xor , R, R(rd) = src1 ^ src2);
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INSTPAT("0000000 ????? ????? 101 ????? 01100 11", srl , R, R(rd) = src1 >> src2);
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INSTPAT("0100000 ????? ????? 101 ????? 01100 11", sra , R, R(rd) = (sword_t)src1 >> (src2 & 0x01F));
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INSTPAT("0000000 ????? ????? 110 ????? 01100 11", or , R, R(rd) = src1 | src2);
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INSTPAT("0000000 ????? ????? 111 ????? 01100 11", and , R, R(rd) = src1 & src2);
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INSTPAT("0000000 00001 00000 000 00000 11100 11", ebreak , N, NEMUTRAP(s->pc, R(10))); // R(10) is $a0
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INSTPAT("??????? ????? ????? ??? ????? ????? ??", inv , N, INV(s->pc));
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// "M"
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INSTPAT("0000001 ????? ????? 000 ????? 01100 11", mul, R, R(rd) = src1 * src2);
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INSTPAT("0000001 ????? ????? 001 ????? 01100 11", mulh, R, R(rd) = (uint64_t)src1 * (uint64_t)src2 >> 32);
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INSTPAT("0000001 ????? ????? 010 ????? 01100 11", mulhsu, R, R(rd) = (int64_t)src1 * (uint64_t)src2 >> 32);
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INSTPAT("0000001 ????? ????? 011 ????? 01100 11", mulhu, R, R(rd) = (int64_t)src1 * (int64_t)src2 >> 32);
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INSTPAT("0000001 ????? ????? 100 ????? 01100 11", div, R, R(rd) = (sword_t)src1 / (sword_t)src2);
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INSTPAT("0000001 ????? ????? 101 ????? 01100 11", divu, R, R(rd) = src1 / src2);
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INSTPAT("0000001 ????? ????? 110 ????? 01100 11", rem, R, R(rd) = (sword_t)src1 % (sword_t)src2);
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INSTPAT("0000001 ????? ????? 111 ????? 01100 11", remu, R, R(rd) = src1 % src2);
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INSTPAT_END();
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R(0) = 0; // reset $zero to 0
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6
nemu/test.c
Normal file
6
nemu/test.c
Normal file
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@ -0,0 +1,6 @@
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#include <stdio.h>
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int main() {
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printf("%d", -9 %4);
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return 0;
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}
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1
result
1
result
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@ -1 +0,0 @@
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/nix/store/d0jlcjdrgsb5pis8flyy5ihifdnfhms5-am-kernels-riscv32-none-elf-2024.02.18
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