From 3e644b48bbbc3c0c3f3dd6bb158ea7b9c2024424 Mon Sep 17 00:00:00 2001
From: Gabe Black <gblack@eecs.umich.edu>
Date: Tue, 2 Oct 2007 22:57:33 -0700
Subject: X86: Fix x87 floating point stack register indexing.

--HG--
extra : convert_revision : b515ec20cbfc50b38aa7da6cf4d465acf9054c08
---
 src/arch/x86/insts/static_inst.cc | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

(limited to 'src/arch/x86/insts')

diff --git a/src/arch/x86/insts/static_inst.cc b/src/arch/x86/insts/static_inst.cc
index 4f6ec5390..510295157 100644
--- a/src/arch/x86/insts/static_inst.cc
+++ b/src/arch/x86/insts/static_inst.cc
@@ -198,13 +198,18 @@ namespace X86ISA
                 return;
             }
             fpindex -= NumMMXRegs;
-            if(fpindex < NumXMMRegs) {
+            if(fpindex < NumXMMRegs * 2) {
                 ccprintf(os, "%%xmm%d_%s", fpindex / 2,
                         (fpindex % 2) ? "high": "low");
                 return;
             }
-            fpindex -= NumXMMRegs;
-            ccprintf(os, "%%ufp%d", fpindex);
+            fpindex -= NumXMMRegs * 2;
+            if(fpindex < NumMicroFpRegs) {
+                ccprintf(os, "%%ufp%d", fpindex);
+                return;
+            }
+            fpindex -= NumMicroFpRegs;
+            ccprintf(os, "%%st(%d)", fpindex);
         } else {
             switch (reg - Ctrl_Base_DepTag) {
               default:
-- 
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