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urv-core
Commit ecc50e05 authored by Tomasz Wlostowski's avatar Tomasz Wlostowski
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sw: correctly emulate divide-by-zero case

parent 49cb85d2
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sw/common/emulate.c
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......@@ -26,7 +26,12 @@ void undefined_insn_handler( struct rv_trap_context *ctx )
else if ( (insn & 0xfe00707f) == 0x2003033 ) // MULHU
ctx->r[rdi] = ((uint64_t) rs1 * (uint64_t) rs2) >> 32;
else if ( (insn & 0xfe00707f) == 0x2004033 ) // DIV
{
if( rs2 == 0 )
ctx->r[rdi] = 0xffffffff;
else
ctx->r[rdi] = (int32_t)rs1 / (int32_t) rs2;
}
else if ( (insn & 0xfe00707f) == 0x2005033 ) // DIVU
ctx->r[rdi] = (uint32_t)rs1 / (uint32_t) rs2;
else if ( (insn & 0xfe00707f) == 0x2006033 ) // REM
......
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