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fixed div by 0 exception

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inixyz
2023-10-26 21:07:05 +03:00
parent f69eff9963
commit 8e03e19f2c
1 changed files with 16 additions and 4 deletions
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20
src/tinyriscv.h
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@@ -114,10 +114,22 @@ inline void tinyriscv_R_type(const u8 funct3, const u8 funct7, u32* x,
x[rd] = ((i64)(i32)x[rs1] * (u64)x[rs2]) >> 32;
break;
case /*MULHU*/ 0x00b: x[rd] = ((u64)x[rs1] * (u64)x[rs2]) >> 32; break;
case /*DIV*/ 0x00c: x[rd] = (i32)x[rs1] / (i32)x[rs2]; break;
case /*DIVU*/ 0x00d: x[rd] = x[rs1] / x[rs2]; break;
case /*REM*/ 0x00e: x[rd] = (i32)x[rs1] % (i32)x[rs2]; break;
case /*REMU*/ 0x00f: x[rd] = x[rs1] % x[rs2]; break;
case /*DIV*/ 0x00c:
if(x[rs2]) x[rd] = (i32)x[rs1] / (i32)x[rs2];
else x[rd] = -1;
break;
case /*DIVU*/ 0x00d:
if(x[rs2]) x[rd] = x[rs1] / x[rs2];
else x[rd] = 0xffffffff;
break;
case /*REM*/ 0x00e:
if(x[rs2]) x[rd] = (i32)x[rs1] % (i32)x[rs2];
else x[rd] = x[rs1];
break;
case /*REMU*/ 0x00f:
if(x[rs2]) x[rd] = x[rs1] % x[rs2];
else x[rd] = x[rs1];
break;
#endif
}
}