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> compile NEMU

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ysyx_22040000 李心杨
Linux calcite 6.6.19 #1-NixOS SMP PREEMPT_DYNAMIC Fri Mar  1 12:35:11 UTC 2024 x86_64 GNU/Linux
 17:50:37  up   4:56,  2 users,  load average: 0.87, 0.84, 0.60
This commit is contained in:
tracer-ysyx 2024-03-20 17:50:37 +08:00 • committed by xinyangli
parent 48786c9988
commit 5eb7785adf
3 changed files with 28 additions and 6 deletions
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15
nemu/src/isa/riscv32/inst.c
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@ -18,6 +18,7 @@
#include <cpu/cpu.h>
#include <cpu/ifetch.h>
#include <cpu/decode.h>
#include <ftrace.h>
#define R(i) gpr(i)
#define Mr vaddr_read
@ -59,6 +60,16 @@ static void do_branch(Decode *s, bool condition, word_t offset) {
}
}
static void ftrace(Decode *s, int rd, vaddr_t dst) {
uint32_t i = s->isa.inst.val;
int rs1 = BITS(i, 19, 15);
if(rs1 == 1 && rd == 0) {
ftrace_return(dst);
} else {
ftrace_call(dst);
}
}
static int decode_exec(Decode *s) {
int rd = 0;
word_t src1 = 0, src2 = 0, imm = 0;
@ -74,8 +85,8 @@ static int decode_exec(Decode *s) {
INSTPAT("??????? ????? ????? ??? ????? 01101 11", lui , U, R(rd) = imm);
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("??????? ????? ????? ??? ????? 11011 11", jal , J, do {s->dnpc = s->pc + imm; R(rd) = s->pc + 4; ftrace_call(s->pc + imm); } while(0));
INSTPAT("??????? ????? ????? ??? ????? 11001 11", jalr , I, do {s->dnpc = src1 + imm; R(rd) = s->pc + 4; ftrace(s, rd, src1 + imm); } 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));