From af4c04c426cca3b73e58ab7464119db28252984c Mon Sep 17 00:00:00 2001
From: Gabe Black <gblack@eecs.umich.edu>
Date: Tue, 4 Sep 2007 23:31:40 -0700
Subject: [PATCH] X86: Add floating point micro registers.

--HG--
extra : convert_revision : 442a5f8b9216638e4e6898f89eacb8695719e20f
---
 src/arch/x86/floatregfile.hh      |  2 +-
 src/arch/x86/floatregs.hh         | 18 +++++++++++++++++-
 src/arch/x86/insts/static_inst.cc | 14 +++++++++++++-
 src/arch/x86/isa/microasm.isa     |  2 ++
 src/arch/x86/x86_traits.hh        |  1 +
 5 files changed, 34 insertions(+), 3 deletions(-)

diff --git a/src/arch/x86/floatregfile.hh b/src/arch/x86/floatregfile.hh
index 282cac796..14dda443f 100644
--- a/src/arch/x86/floatregfile.hh
+++ b/src/arch/x86/floatregfile.hh
@@ -101,7 +101,7 @@ namespace X86ISA
     std::string getFloatRegName(RegIndex);
 
     //Each 128 bit xmm register is broken into two effective 64 bit registers.
-    const int NumFloatArchRegs = NumMMXRegs + 2 * NumXMMRegs;
+    const int NumFloatArchRegs = NumMMXRegs + 2 * NumXMMRegs + NumMicroFpRegs;
     const int NumFloatRegs = NumFloatArchRegs;
 
     class FloatRegFile
diff --git a/src/arch/x86/floatregs.hh b/src/arch/x86/floatregs.hh
index 552cf6371..b9d6a5c43 100644
--- a/src/arch/x86/floatregs.hh
+++ b/src/arch/x86/floatregs.hh
@@ -120,7 +120,17 @@ namespace X86ISA
         FLOATREG_XMM15_LOW,
         FLOATREG_XMM15_HIGH,
 
-        NUM_FLOATREGS = FLOATREG_XMM_BASE + 2 * NumXMMRegs
+        FLOATREG_MICROFP_BASE = FLOATREG_XMM_BASE + 2 * NumXMMRegs,
+        FLOATREG_MICROFP0 = FLOATREG_MICROFP_BASE,
+        FLOATREG_MICROFP1,
+        FLOATREG_MICROFP2,
+        FLOATREG_MICROFP3,
+        FLOATREG_MICROFP4,
+        FLOATREG_MICROFP5,
+        FLOATREG_MICROFP6,
+        FLOATREG_MICROFP7,
+
+        NUM_FLOATREGS = FLOATREG_MICROFP_BASE + NumMicroFpRegs
     };
 
     static inline FloatRegIndex
@@ -146,6 +156,12 @@ namespace X86ISA
     {
         return (FloatRegIndex)(FLOATREG_XMM_BASE + 2 * index + 1);
     }
+
+    static inline FloatRegIndex
+    FLOATREG_MICROFP(int index)
+    {
+        return (FloatRegIndex)(FLOATREG_MICROFP_BASE + index);
+    }
 };
 
 #endif // __ARCH_X86_FLOATREGS_HH__
diff --git a/src/arch/x86/insts/static_inst.cc b/src/arch/x86/insts/static_inst.cc
index 948a74bc1..4f6ec5390 100644
--- a/src/arch/x86/insts/static_inst.cc
+++ b/src/arch/x86/insts/static_inst.cc
@@ -192,7 +192,19 @@ namespace X86ISA
             }
             ccprintf(os, suffix);
         } else if (reg < Ctrl_Base_DepTag) {
-            ccprintf(os, "%%f%d", reg - FP_Base_DepTag);
+            int fpindex = reg - FP_Base_DepTag;
+            if(fpindex < NumMMXRegs) {
+                ccprintf(os, "%%mmx%d", reg - FP_Base_DepTag);
+                return;
+            }
+            fpindex -= NumMMXRegs;
+            if(fpindex < NumXMMRegs) {
+                ccprintf(os, "%%xmm%d_%s", fpindex / 2,
+                        (fpindex % 2) ? "high": "low");
+                return;
+            }
+            fpindex -= NumXMMRegs;
+            ccprintf(os, "%%ufp%d", fpindex);
         } else {
             switch (reg - Ctrl_Base_DepTag) {
               default:
diff --git a/src/arch/x86/isa/microasm.isa b/src/arch/x86/isa/microasm.isa
index dcc20c708..579909506 100644
--- a/src/arch/x86/isa/microasm.isa
+++ b/src/arch/x86/isa/microasm.isa
@@ -75,6 +75,8 @@ let {{
     # Add in symbols for the microcode registers
     for num in range(15):
         assembler.symbols["t%d" % num] = "NUM_INTREGS+%d" % num
+    for num in range(7):
+        assembler.symbols["ufp%d" % num] = "FLOATREG_MICROFP(%d)" % num
     # Add in symbols for the segment descriptor registers
     for letter in ("C", "D", "E", "F", "G", "S"):
         assembler.symbols["%ss" % letter.lower()] = "SEGMENT_REG_%sS" % letter
diff --git a/src/arch/x86/x86_traits.hh b/src/arch/x86/x86_traits.hh
index 381a60a63..aa5b959d1 100644
--- a/src/arch/x86/x86_traits.hh
+++ b/src/arch/x86/x86_traits.hh
@@ -65,6 +65,7 @@ namespace X86ISA
 
     const int NumMMXRegs = 8;
     const int NumXMMRegs = 16;
+    const int NumMicroFpRegs = 8;
 
     const int NumCRegs = 16;
     const int NumDRegs = 8;
-- 
2.30.2