From: Gabe Black <gblack@eecs.umich.edu>
Date: Wed, 5 Aug 2009 10:00:43 +0000 (-0700)
Subject: X86: Fix the computation of the upper part of rotate right with carry.
X-Git-Tag: Calvin_Submission~174
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=bab4597fc555dfe25b5d22c8634361e01bb2e981;p=gem5.git

X86: Fix the computation of the upper part of rotate right with carry.
---

diff --git a/src/arch/x86/isa/microops/regop.isa b/src/arch/x86/isa/microops/regop.isa
index 2514be91a..1aa7c510b 100644
--- a/src/arch/x86/isa/microops/regop.isa
+++ b/src/arch/x86/isa/microops/regop.isa
@@ -767,7 +767,7 @@ let {{
                 CCFlagBits flags = ccFlagBits;
                 uint64_t top = flags.cf << (dataSize * 8 - shiftAmt);
                 if(shiftAmt > 1)
-                    top |= psrc1 << (dataSize * 8 - shiftAmt - 1);
+                    top |= psrc1 << (dataSize * 8 - shiftAmt + 1);
                 uint64_t bottom = bits(psrc1, dataSize * 8, shiftAmt);
                 DestReg = merge(DestReg, top | bottom, dataSize);
             }