changeset c52c581277bf in /z/repo/m5
details: http://repo.m5sim.org/m5?cmd=changeset;node=c52c581277bf
description:
X86: Actual change that fixes div. How did that happen?
diffstat:
src/arch/x86/isa/microops/regop.isa | 8 ++++++--
1 files changed, 6 insertions(+), 2 deletions(-)
diffs (24 lines):
diff -r 56bbefb997fe -r c52c581277bf src/arch/x86/isa/microops/regop.isa
--- a/src/arch/x86/isa/microops/regop.isa Wed May 12 00:37:29 2010 -0700
+++ b/src/arch/x86/isa/microops/regop.isa Wed May 12 00:49:12 2010 -0700
@@ -620,14 +620,18 @@
remaining--;
}
if (dividend & (ULL(1) << 63)) {
+ bool highBit = false;
if (dividend < divisor && remaining) {
+ highBit = true;
dividend = (dividend << 1) |
bits(SrcReg1, remaining - 1);
quotient <<= 1;
remaining--;
}
- quotient++;
- dividend -= divisor;
+ if (highBit || divisor <= dividend) {
+ quotient++;
+ dividend -= divisor;
+ }
}
remainder = dividend;
} else {
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