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MIPS64: Fix MULT in simulator to conform the spec.

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TEST=mjsunit/numops-fuzz-part4
BUG=
R=balazs.kilvady@imgtec.com

Review URL: https://codereview.chromium.org/756073003

Cr-Commit-Position: refs/heads/master@{#25568}
This commit is contained in:
Dusan Milosavljevic 2014-11-28 14:35:00 +01:00
parent 6f60c0d3b8
commit 1d42a9db5c
1 changed files with 5 additions and 6 deletions
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11
src/mips64/simulator-mips64.cc
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@ -2080,13 +2080,12 @@ void Simulator::ConfigureTypeRegister(Instruction* instr,
case MFLO:
*alu_out = get_register(LO);
break;
case MULT: // MULT == D_MUL_MUH.
// TODO(plind) - Unify MULT/DMULT with single set of 64-bit HI/Lo
// regs.
// TODO(plind) - make the 32-bit MULT ops conform to spec regarding
// checking of 32-bit input values, and un-define operations of HW.
*i64hilo = rs * rt;
case MULT: { // MULT == D_MUL_MUH.
int32_t rs_lo = static_cast<int32_t>(rs);
int32_t rt_lo = static_cast<int32_t>(rt);
*i64hilo = static_cast<int64_t>(rs_lo) * static_cast<int64_t>(rt_lo);
break;
}
case MULTU:
*u64hilo = static_cast<uint64_t>(rs_u & 0xffffffff) *
static_cast<uint64_t>(rt_u & 0xffffffff);