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> compile NEMU

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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
 22:52:05  up 1 day  2:20,  2 users,  load average: 0.37, 0.30, 0.19
This commit is contained in:
tracer-ysyx 2024-03-05 22:52:05 +08:00 committed by xinyangli
parent 2170c014b5
commit b564f649f2
1 changed files with 22 additions and 3 deletions
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25
nemu/src/isa/riscv32/inst.c
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@ -13,6 +13,7 @@
* See the Mulan PSL v2 for more details.
***************************************************************************************/
#include "common.h"
#include "local-include/reg.h"
#include <cpu/cpu.h>
#include <cpu/ifetch.h>
@ -23,7 +24,7 @@
#define Mw vaddr_write
enum {
TYPE_R, TYPE_I, TYPE_U, TYPE_S, TYPE_J,
TYPE_R, TYPE_I, TYPE_U, TYPE_S, TYPE_B, TYPE_J,
TYPE_N, // none
};
@ -32,7 +33,8 @@ enum {
#define immI() do { *imm = SEXT(BITS(i, 31, 20), 12); } while(0)
#define immU() do { *imm = SEXT(BITS(i, 31, 12), 20) << 12; } while(0)
#define immS() do { *imm = (SEXT(BITS(i, 31, 25), 7) << 5) | BITS(i, 11, 7); } while(0)
#define immJ() do { *imm = (SEXT(BITS(i, 31, 30), 1) << 20) | BITS(i, 30, 21) << 1 | BITS(i, 21, 20) << 11 | BITS(i, 19, 12) << 12; } while(0)
#define immB() do { *imm = (SEXT(BITS(i, 31, 31), 1) << 12 | BITS(i, 30, 25) << 5 | BITS(i, 11, 8) << 1 | BITS(i, 8, 8) << 11; } while(0)
#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)
static void decode_operand(Decode *s, int *rd, word_t *src1, word_t *src2, word_t *imm, int type) {
uint32_t i = s->isa.inst.val;
@ -48,6 +50,12 @@ static void decode_operand(Decode *s, int *rd, word_t *src1, word_t *src2, word_
}
}
static void do_branch(Decode *s, bool condition, word_t offset) {
if (condition) {
s->dnpc = s->pc + offset;
}
}
static int decode_exec(Decode *s) {
int rd = 0;
word_t src1 = 0, src2 = 0, imm = 0;
@ -64,10 +72,21 @@ static int decode_exec(Decode *s) {
INSTPAT("??????? ????? ????? ??? ????? 00101 11", auipc , U, R(rd) = s->pc + imm);
INSTPAT("??????? ????? ????? ??? ????? 11011 11", jal , J, do {s->dnpc = s->pc + imm; R(rd) = s->pc + 4; } while(0));
INSTPAT("??????? ????? ????? ??? ????? 11001 11", jalr , I, do {s->dnpc = src1 + imm; R(rd) = s->pc + 4; } while(0));
INSTPAT("??????? ????? ????? 000 ????? 11000 11", beq , B, do_branch(s, src1 == src2, imm));
INSTPAT("??????? ????? ????? 001 ????? 11000 11", bne , B, do_branch(s, src1 != src2, imm));
INSTPAT("??????? ????? ????? 100 ????? 11000 11", blt , B, do_branch(s, (sword_t)src1 < (sword_t)src2, imm));
INSTPAT("??????? ????? ????? 101 ????? 11000 11", bge , B, do_branch(s, (sword_t)src1 >= (sword_t)src2, imm));
INSTPAT("??????? ????? ????? 110 ????? 11000 11", bltu , B, do_branch(s, src1 < src2, imm));
INSTPAT("??????? ????? ????? 111 ????? 11000 11", bgeu , B, do_branch(s, src1 >= src2, imm));
INSTPAT("??????? ????? ????? 000 ????? 00000 11", lb , I, R(rd) = SEXT(Mr(src1 + imm, 1), 8));
INSTPAT("??????? ????? ????? 001 ????? 00000 11", lh , I, R(rd) = SEXT(Mr(src1 + imm, 2), 16));
INSTPAT("??????? ????? ????? 010 ????? 00000 11", lw , I, R(rd) = SEXT(Mr(src1 + imm, 4), 32));
INSTPAT("??????? ????? ????? 100 ????? 00000 11", lbu , I, R(rd) = Mr(src1 + imm, 1));
INSTPAT("??????? ????? ????? 101 ????? 00000 11", lhu , I, R(rd) = Mr(src1 + imm, 2));
INSTPAT("??????? ????? ????? 000 ????? 01000 11", sb , S, Mw(src1 + imm, 1, src2));
INSTPAT("??????? ????? ????? 001 ????? 01000 11", sh , S, Mw(src1 + imm, 2, src2));
INSTPAT("??????? ????? ????? 010 ????? 01000 11", sw , S, Mw(src1 + imm, 4, src2));
INSTPAT("??????? ????? ????? 000 ????? 00100 11", addi , I, R(rd) = src1 + (sword_t)imm);
INSTPAT("??????? ????? ????? 000 ????? 00100 11", addi , I, R(rd) = src1 + imm);
INSTPAT("0000000 ????? ????? 000 ????? 01100 11", add , R, R(rd) = src1 + src2);
INSTPAT("0000000 00001 00000 000 00000 11100 11", ebreak , N, NEMUTRAP(s->pc, R(10))); // R(10) is $a0