2002-03-02 Chris Demetriou <cgd@broadcom.com>

        * mips.igen (LL, LLD, PREF, SC, SCD, ABS.fmt, ADD.fmt, CEIL.L.fmt,
        CEIL.W, CVT.D.fmt, CVT.L.fmt, CVT.S.fmt, CVT.W.fmt, DIV.fmt,
        FLOOR.L.fmt, FLOOR.W.fmt, MADD.D, MADD.S, MOV.fmt, MOVtf.fmt,
        MSUB.D, MSUB.S, MUL.fmt, NEG.fmt, NMADD.D, NMADD.S, NMSUB.D,
        NMSUB.S, PREFX, RECIP.fmt, ROUND.L.fmt, ROUND.W.fmt, RSQRT.fmt,
        SQRT.fmt, SUB.fmt, SWC1, SWXC1, TRUNC.L.fmt, TRUNC.W, CACHE):
        Don't split opcode fields by hand, use the opcode field values
        provided by igen.

1 files changed, 134 insertions, 276 deletions

diff --git a/sim/mips/mips.igen b/sim/mips/mips.igen
index b5930d5..1e6eb62 100644
--- a/sim/mips/mips.igen
+++ b/sim/mips/mips.igen
@@ -1692,12 +1692,10 @@
 *vr4100:
 *vr5000:
 {
-  unsigned32 instruction = instruction_0;
-  signed_word offset = SIGNEXTEND((signed_word)((instruction >> 0) & 0x0000FFFF),16);
-  int destreg = ((instruction >> 16) & 0x0000001F);
-  signed_word op1 = GPR[((instruction >> 21) & 0x0000001F)];
+  address_word base = GPR[BASE];
+  address_word offset = EXTEND16 (OFFSET);
   {
-    address_word vaddr = ((unsigned64)op1 + offset);
+    address_word vaddr = ((unsigned64)base + offset);
     address_word paddr;
     int uncached;
     if ((vaddr & 3) != 0)
@@ -1718,7 +1716,7 @@
 	    paddr = ((paddr & ~mask) | ((paddr & mask) ^ (reverse << shift)));
 	    LoadMemory(&memval,&memval1,uncached,AccessLength_WORD,paddr,vaddr,isDATA,isREAL);
 	    byte = ((vaddr & mask) ^ (bigend << shift));
-	    GPR[destreg] = (SIGNEXTEND(((memval >> (8 * byte)) & 0xFFFFFFFF),32));
+	    GPR[RT] = (SIGNEXTEND(((memval >> (8 * byte)) & 0xFFFFFFFF),32));
 	    LLBIT = 1;
 	  }
       }
@@ -1734,13 +1732,11 @@
 *vr4100:
 *vr5000:
 {
-  unsigned32 instruction = instruction_0;
-  signed_word offset = SIGNEXTEND((signed_word)((instruction >> 0) & 0x0000FFFF),16);
-  int destreg = ((instruction >> 16) & 0x0000001F);
-  signed_word op1 = GPR[((instruction >> 21) & 0x0000001F)];
+  address_word base = GPR[BASE];
+  address_word offset = EXTEND16 (OFFSET);
   check_u64 (SD_, instruction_0);
   {
-    address_word vaddr = ((unsigned64)op1 + offset);
+    address_word vaddr = ((unsigned64)base + offset);
     address_word paddr;
     int uncached;
     if ((vaddr & 7) != 0)
@@ -1754,7 +1750,7 @@
 	    unsigned64 memval = 0;
 	    unsigned64 memval1 = 0;
 	    LoadMemory(&memval,&memval1,uncached,AccessLength_DOUBLEWORD,paddr,vaddr,isDATA,isREAL);
-	    GPR[destreg] = memval;
+	    GPR[RT] = memval;
 	    LLBIT = 1;
 	  }
       }
@@ -2104,17 +2100,15 @@
 *mipsV:
 *vr5000:
 {
-  unsigned32 instruction = instruction_0;
-  signed_word offset = SIGNEXTEND((signed_word)((instruction >> 0) & 0x0000FFFF),16);
-  int hint = ((instruction >> 16) & 0x0000001F);
-  signed_word op1 = GPR[((instruction >> 21) & 0x0000001F)];
+  address_word base = GPR[BASE];
+  address_word offset = EXTEND16 (OFFSET);
   {
-    address_word vaddr = ((unsigned64)op1 + offset);
+    address_word vaddr = ((unsigned64)base + offset);
     address_word paddr;
     int uncached;
     {
       if (AddressTranslation(vaddr,isDATA,isLOAD,&paddr,&uncached,isTARGET,isREAL))
-	Prefetch(uncached,paddr,vaddr,isDATA,hint);
+	Prefetch(uncached,paddr,vaddr,isDATA,HINT);
     }
   }
 }
@@ -2235,11 +2229,10 @@
 *vr5000:
 {
   unsigned32 instruction = instruction_0;
-  signed_word offset = SIGNEXTEND((signed_word)((instruction >> 0) & 0x0000FFFF),16);
-  signed_word op2 = GPR[((instruction >> 16) & 0x0000001F)];
-  signed_word op1 = GPR[((instruction >> 21) & 0x0000001F)];
+  address_word base = GPR[BASE];
+  address_word offset = EXTEND16 (OFFSET);
   {
-    address_word vaddr = ((unsigned64)op1 + offset);
+    address_word vaddr = ((unsigned64)base + offset);
     address_word paddr;
     int uncached;
     if ((vaddr & 3) != 0)
@@ -2256,12 +2249,12 @@
 	    unsigned int byte;
 	    paddr = ((paddr & ~mask) | ((paddr & mask) ^ (ReverseEndian << 2)));
 	    byte = ((vaddr & mask) ^ (BigEndianCPU << 2));
-	    memval = ((unsigned64) op2 << (8 * byte));
+	    memval = ((unsigned64) GPR[RT] << (8 * byte));
 	    if (LLBIT)
 	      {
 		StoreMemory(uncached,AccessLength_WORD,memval,memval1,paddr,vaddr,isREAL);
 	      }
-	    GPR[(instruction >> 16) & 0x0000001F] = LLBIT;
+	    GPR[RT] = LLBIT;
 	  }
       }
   }
@@ -2276,13 +2269,11 @@
 *vr4100:
 *vr5000:
 {
-  unsigned32 instruction = instruction_0;
-  signed_word offset = SIGNEXTEND((signed_word)((instruction >> 0) & 0x0000FFFF),16);
-  signed_word op2 = GPR[((instruction >> 16) & 0x0000001F)];
-  signed_word op1 = GPR[((instruction >> 21) & 0x0000001F)];
+  address_word base = GPR[BASE];
+  address_word offset = EXTEND16 (OFFSET);
   check_u64 (SD_, instruction_0);
   {
-    address_word vaddr = ((unsigned64)op1 + offset);
+    address_word vaddr = ((unsigned64)base + offset);
     address_word paddr;
     int uncached;
     if ((vaddr & 7) != 0)
@@ -2295,12 +2286,12 @@
 	  {
 	    unsigned64 memval = 0;
 	    unsigned64 memval1 = 0;
-	    memval = op2;
+	    memval = GPR[RT];
 	    if (LLBIT)
 	      {
 		StoreMemory(uncached,AccessLength_DOUBLEWORD,memval,memval1,paddr,vaddr,isREAL);
 	      }
-	    GPR[(instruction >> 16) & 0x0000001F] = LLBIT;
+	    GPR[RT] = LLBIT;
 	  }
       }
   }
@@ -3058,16 +3049,13 @@
 *vr5000:
 *r3900:
 {
-  unsigned32 instruction = instruction_0;
-  int destreg = ((instruction >> 6) & 0x0000001F);
-  int fs = ((instruction >> 11) & 0x0000001F);
-  int format = ((instruction >> 21) & 0x00000007);
+  int fmt = FMT;
   check_fpu(SD_);
   {
-    if ((format != fmt_single) && (format != fmt_double))
-      SignalException(ReservedInstruction,instruction);
+    if ((fmt != fmt_single) && (fmt != fmt_double))
+      SignalException(ReservedInstruction,instruction_0);
     else
-      StoreFPR(destreg,format,AbsoluteValue(ValueFPR(fs,format),format));
+      StoreFPR(FD,fmt,AbsoluteValue(ValueFPR(FS,fmt),fmt));
   }
 }
 
@@ -3084,17 +3072,13 @@
 *vr5000:
 *r3900:
 {
-  unsigned32 instruction = instruction_0;
-  int destreg = ((instruction >> 6) & 0x0000001F);
-  int fs = ((instruction >> 11) & 0x0000001F);
-  int ft = ((instruction >> 16) & 0x0000001F);
-  int format = ((instruction >> 21) & 0x00000007);
+  int fmt = FMT;
   check_fpu(SD_);
   {
-    if ((format != fmt_single) && (format != fmt_double))
-      SignalException(ReservedInstruction, instruction);
+    if ((fmt != fmt_single) && (fmt != fmt_double))
+      SignalException(ReservedInstruction, instruction_0);
     else
-      StoreFPR(destreg,format,Add(ValueFPR(fs,format),ValueFPR(ft,format),format));
+      StoreFPR(FD,fmt,Add(ValueFPR(FS,fmt),ValueFPR(FT,fmt),fmt));
   }
 }
 
@@ -3233,16 +3217,13 @@
 *vr5000:
 *r3900:
 {
-  unsigned32 instruction = instruction_0;
-  int destreg = ((instruction >> 6) & 0x0000001F);
-  int fs = ((instruction >> 11) & 0x0000001F);
-  int format = ((instruction >> 21) & 0x00000007);
+  int fmt = FMT;
   check_fpu(SD_);
   {
-    if ((format != fmt_single) && (format != fmt_double))
-      SignalException(ReservedInstruction,instruction);
+    if ((fmt != fmt_single) && (fmt != fmt_double))
+      SignalException(ReservedInstruction,instruction_0);
     else
-      StoreFPR(destreg,fmt_long,Convert(FP_RM_TOPINF,ValueFPR(fs,format),format,fmt_long));
+      StoreFPR(FD,fmt_long,Convert(FP_RM_TOPINF,ValueFPR(FS,fmt),fmt,fmt_long));
   }
 }
 
@@ -3256,16 +3237,13 @@
 *vr5000:
 *r3900:
 {
-  unsigned32 instruction = instruction_0;
-  int destreg = ((instruction >> 6) & 0x0000001F);
-  int fs = ((instruction >> 11) & 0x0000001F);
-  int format = ((instruction >> 21) & 0x00000007);
+  int fmt = FMT;
   check_fpu(SD_);
   {
-  if ((format != fmt_single) && (format != fmt_double))
-   SignalException(ReservedInstruction,instruction);
+  if ((fmt != fmt_single) && (fmt != fmt_double))
+   SignalException(ReservedInstruction,instruction_0);
   else
-   StoreFPR(destreg,fmt_word,Convert(FP_RM_TOPINF,ValueFPR(fs,format),format,fmt_word));
+   StoreFPR(FD,fmt_word,Convert(FP_RM_TOPINF,ValueFPR(FS,fmt),fmt,fmt_word));
   }
 }
 
@@ -3359,16 +3337,13 @@
 *vr5000:
 *r3900:
 {
-  unsigned32 instruction = instruction_0;
-  int destreg = ((instruction >> 6) & 0x0000001F);
-  int fs = ((instruction >> 11) & 0x0000001F);
-  int format = ((instruction >> 21) & 0x00000007);
+  int fmt = FMT;
   check_fpu(SD_);
   {
-    if ((format == fmt_double) | 0)
-      SignalException(ReservedInstruction,instruction);
+    if ((fmt == fmt_double) | 0)
+      SignalException(ReservedInstruction,instruction_0);
     else
-      StoreFPR(destreg,fmt_double,Convert(GETRM(),ValueFPR(fs,format),format,fmt_double));
+      StoreFPR(FD,fmt_double,Convert(GETRM(),ValueFPR(FS,fmt),fmt,fmt_double));
   }
 }
 
@@ -3382,16 +3357,13 @@
 *vr5000:
 *r3900:
 {
-  unsigned32 instruction = instruction_0;
-  int destreg = ((instruction >> 6) & 0x0000001F);
-  int fs = ((instruction >> 11) & 0x0000001F);
-  int format = ((instruction >> 21) & 0x00000007);
+  int fmt = FMT;
   check_fpu(SD_);
   {
-    if ((format == fmt_long) | ((format == fmt_long) || (format == fmt_word)))
-      SignalException(ReservedInstruction,instruction);
+    if ((fmt == fmt_long) | ((fmt == fmt_long) || (fmt == fmt_word)))
+      SignalException(ReservedInstruction,instruction_0);
     else
-      StoreFPR(destreg,fmt_long,Convert(GETRM(),ValueFPR(fs,format),format,fmt_long));
+      StoreFPR(FD,fmt_long,Convert(GETRM(),ValueFPR(FS,fmt),fmt,fmt_long));
   }
 }
 
@@ -3410,16 +3382,13 @@
 *vr5000:
 *r3900:
 {
-  unsigned32 instruction = instruction_0;
-  int destreg = ((instruction >> 6) & 0x0000001F);
-  int fs = ((instruction >> 11) & 0x0000001F);
-  int format = ((instruction >> 21) & 0x00000007);
+  int fmt = FMT;
   check_fpu(SD_);
   {
-    if ((format == fmt_single) | 0)
-      SignalException(ReservedInstruction,instruction);
+    if ((fmt == fmt_single) | 0)
+      SignalException(ReservedInstruction,instruction_0);
     else
-      StoreFPR(destreg,fmt_single,Convert(GETRM(),ValueFPR(fs,format),format,fmt_single));
+      StoreFPR(FD,fmt_single,Convert(GETRM(),ValueFPR(FS,fmt),fmt,fmt_single));
   }
 }
 
@@ -3435,16 +3404,13 @@
 *vr5000:
 *r3900:
 {
-  unsigned32 instruction = instruction_0;
-  int destreg = ((instruction >> 6) & 0x0000001F);
-  int fs = ((instruction >> 11) & 0x0000001F);
-  int format = ((instruction >> 21) & 0x00000007);
+  int fmt = FMT;
   check_fpu(SD_);
   {
-    if ((format == fmt_word) | ((format == fmt_long) || (format == fmt_word)))
-      SignalException(ReservedInstruction,instruction);
+    if ((fmt == fmt_word) | ((fmt == fmt_long) || (fmt == fmt_word)))
+      SignalException(ReservedInstruction,instruction_0);
     else
-      StoreFPR(destreg,fmt_word,Convert(GETRM(),ValueFPR(fs,format),format,fmt_word));
+      StoreFPR(FD,fmt_word,Convert(GETRM(),ValueFPR(FS,fmt),fmt,fmt_word));
   }
 }
 
@@ -3460,17 +3426,13 @@
 *vr5000:
 *r3900:
 {
-  unsigned32 instruction = instruction_0;
-  int destreg = ((instruction >> 6) & 0x0000001F);
-  int fs = ((instruction >> 11) & 0x0000001F);
-  int ft = ((instruction >> 16) & 0x0000001F);
-  int format = ((instruction >> 21) & 0x00000007);
+  int fmt = FMT;
   check_fpu(SD_);
   {
-    if ((format != fmt_single) && (format != fmt_double))
-      SignalException(ReservedInstruction,instruction);
+    if ((fmt != fmt_single) && (fmt != fmt_double))
+      SignalException(ReservedInstruction,instruction_0);
     else
-      StoreFPR(destreg,format,Divide(ValueFPR(fs,format),ValueFPR(ft,format),format));
+      StoreFPR(FD,fmt,Divide(ValueFPR(FS,fmt),ValueFPR(FT,fmt),fmt));
   }
 }
 
@@ -3553,16 +3515,13 @@
 *vr5000:
 *r3900:
 {
-  unsigned32 instruction = instruction_0;
-  int destreg = ((instruction >> 6) & 0x0000001F);
-  int fs = ((instruction >> 11) & 0x0000001F);
-  int format = ((instruction >> 21) & 0x00000007);
+  int fmt = FMT;
   check_fpu(SD_);
   {
-    if ((format != fmt_single) && (format != fmt_double))
-      SignalException(ReservedInstruction,instruction);
+    if ((fmt != fmt_single) && (fmt != fmt_double))
+      SignalException(ReservedInstruction,instruction_0);
     else
-      StoreFPR(destreg,fmt_long,Convert(FP_RM_TOMINF,ValueFPR(fs,format),format,fmt_long));
+      StoreFPR(FS,fmt_long,Convert(FP_RM_TOMINF,ValueFPR(FS,fmt),fmt,fmt_long));
   }
 }
 
@@ -3577,16 +3536,13 @@
 *vr5000:
 *r3900:
 {
-  unsigned32 instruction = instruction_0;
-  int destreg = ((instruction >> 6) & 0x0000001F);
-  int fs = ((instruction >> 11) & 0x0000001F);
-  int format = ((instruction >> 21) & 0x00000007);
+  int fmt = FMT;
   check_fpu(SD_);
   {
-    if ((format != fmt_single) && (format != fmt_double))
-      SignalException(ReservedInstruction,instruction);
+    if ((fmt != fmt_single) && (fmt != fmt_double))
+      SignalException(ReservedInstruction,instruction_0);
     else
-      StoreFPR(destreg,fmt_word,Convert(FP_RM_TOMINF,ValueFPR(fs,format),format,fmt_word));
+      StoreFPR(FD,fmt_word,Convert(FP_RM_TOMINF,ValueFPR(FS,fmt),fmt,fmt_word));
   }
 }
 
@@ -3657,14 +3613,9 @@
 *mipsV:
 *vr5000:
 {
-  unsigned32 instruction = instruction_0;
-  int destreg = ((instruction >> 6) & 0x0000001F);
-  int fs = ((instruction >> 11) & 0x0000001F);
-  int ft = ((instruction >> 16) & 0x0000001F);
-  int fr = ((instruction >> 21) & 0x0000001F);
   check_fpu(SD_);
   {
-    StoreFPR(destreg,fmt_double,Add(Multiply(ValueFPR(fs,fmt_double),ValueFPR(ft,fmt_double),fmt_double),ValueFPR(fr,fmt_double),fmt_double));
+    StoreFPR(FD,fmt_double,Add(Multiply(ValueFPR(FS,fmt_double),ValueFPR(FT,fmt_double),fmt_double),ValueFPR(FR,fmt_double),fmt_double));
   }
 }
 
@@ -3675,14 +3626,9 @@
 *mipsV:
 *vr5000:
 {
-  unsigned32 instruction = instruction_0;
-  int destreg = ((instruction >> 6) & 0x0000001F);
-  int fs = ((instruction >> 11) & 0x0000001F);
-  int ft = ((instruction >> 16) & 0x0000001F);
-  int fr = ((instruction >> 21) & 0x0000001F);
   check_fpu(SD_);
   {
-    StoreFPR(destreg,fmt_single,Add(Multiply(ValueFPR(fs,fmt_single),ValueFPR(ft,fmt_single),fmt_single),ValueFPR(fr,fmt_single),fmt_single));
+    StoreFPR(FD,fmt_single,Add(Multiply(ValueFPR(FS,fmt_single),ValueFPR(FT,fmt_single),fmt_single),ValueFPR(FR,fmt_single),fmt_single));
   }
 }
 
@@ -3741,14 +3687,9 @@
 *vr5000:
 *r3900:
 {
-  unsigned32 instruction = instruction_0;
-  int destreg = ((instruction >> 6) & 0x0000001F);
-  int fs = ((instruction >> 11) & 0x0000001F);
-  int format = ((instruction >> 21) & 0x00000007);
+  int fmt = FMT;
   check_fpu(SD_);
-  {
-    StoreFPR(destreg,format,ValueFPR(fs,format));
-  }
+  StoreFPR(FD,fmt,ValueFPR(FS,fmt));
 }
 
 
@@ -3774,14 +3715,13 @@
 *mipsV:
 *vr5000:
 {
-  unsigned32 instruction = instruction_0;
-  int format = ((instruction >> 21) & 0x00000007);
+  int fmt = FMT;
   check_fpu(SD_);
   {
    if (GETFCC(CC) == TF)
-     StoreFPR (FD, format, ValueFPR (FS, format));
+     StoreFPR (FD, fmt, ValueFPR (FS, fmt));
    else
-     StoreFPR (FD, format, ValueFPR (FD, format));
+     StoreFPR (FD, fmt, ValueFPR (FD, fmt));
   }
 }
 
@@ -3828,15 +3768,8 @@
 *mipsV:
 *vr5000:
 {
-  unsigned32 instruction = instruction_0;
-  int destreg = ((instruction >> 6) & 0x0000001F);
-  int fs = ((instruction >> 11) & 0x0000001F);
-  int ft = ((instruction >> 16) & 0x0000001F);
-  int fr = ((instruction >> 21) & 0x0000001F);
   check_fpu(SD_);
-  {
-    StoreFPR(destreg,fmt_double,Sub(Multiply(ValueFPR(fs,fmt_double),ValueFPR(ft,fmt_double),fmt_double),ValueFPR(fr,fmt_double),fmt_double));
-  }
+  StoreFPR(FD,fmt_double,Sub(Multiply(ValueFPR(FS,fmt_double),ValueFPR(FT,fmt_double),fmt_double),ValueFPR(FR,fmt_double),fmt_double));
 }
 
 
@@ -3847,15 +3780,8 @@
 *mipsV:
 *vr5000:
 {
-  unsigned32 instruction = instruction_0;
-  int destreg = ((instruction >> 6) & 0x0000001F);
-  int fs = ((instruction >> 11) & 0x0000001F);
-  int ft = ((instruction >> 16) & 0x0000001F);
-  int fr = ((instruction >> 21) & 0x0000001F);
   check_fpu(SD_);
-  {
-   StoreFPR(destreg,fmt_single,Sub(Multiply(ValueFPR(fs,fmt_single),ValueFPR(ft,fmt_single),fmt_single),ValueFPR(fr,fmt_single),fmt_single));
-  }
+  StoreFPR(FD,fmt_single,Sub(Multiply(ValueFPR(FS,fmt_single),ValueFPR(FT,fmt_single),fmt_single),ValueFPR(FR,fmt_single),fmt_single));
 }
 
 
@@ -3873,17 +3799,13 @@
 *vr5000:
 *r3900:
 {
-  unsigned32 instruction = instruction_0;
-  int destreg = ((instruction >> 6) & 0x0000001F);
-  int fs = ((instruction >> 11) & 0x0000001F);
-  int ft = ((instruction >> 16) & 0x0000001F);
-  int format = ((instruction >> 21) & 0x00000007);
+  int fmt = FMT;
   check_fpu(SD_);
   {
-    if ((format != fmt_single) && (format != fmt_double))
-      SignalException(ReservedInstruction,instruction);
+    if ((fmt != fmt_single) && (fmt != fmt_double))
+      SignalException(ReservedInstruction,instruction_0);
     else
-      StoreFPR(destreg,format,Multiply(ValueFPR(fs,format),ValueFPR(ft,format),format));
+      StoreFPR(FD,fmt,Multiply(ValueFPR(FS,fmt),ValueFPR(FT,fmt),fmt));
   }
 }
 
@@ -3899,16 +3821,13 @@
 *vr5000:
 *r3900:
 {
-  unsigned32 instruction = instruction_0;
-  int destreg = ((instruction >> 6) & 0x0000001F);
-  int fs = ((instruction >> 11) & 0x0000001F);
-  int format = ((instruction >> 21) & 0x00000007);
+  int fmt = FMT;
   check_fpu(SD_);
   {
-    if ((format != fmt_single) && (format != fmt_double))
-      SignalException(ReservedInstruction,instruction);
+    if ((fmt != fmt_single) && (fmt != fmt_double))
+      SignalException(ReservedInstruction,instruction_0);
     else
-      StoreFPR(destreg,format,Negate(ValueFPR(fs,format),format));
+      StoreFPR(FD,fmt,Negate(ValueFPR(FS,fmt),fmt));
   }
 }
 
@@ -3920,15 +3839,8 @@
 *mipsV:
 *vr5000:
 {
-  unsigned32 instruction = instruction_0;
-  int destreg = ((instruction >> 6) & 0x0000001F);
-  int fs = ((instruction >> 11) & 0x0000001F);
-  int ft = ((instruction >> 16) & 0x0000001F);
-  int fr = ((instruction >> 21) & 0x0000001F);
   check_fpu(SD_);
-  {
-   StoreFPR(destreg,fmt_double,Negate(Add(Multiply(ValueFPR(fs,fmt_double),ValueFPR(ft,fmt_double),fmt_double),ValueFPR(fr,fmt_double),fmt_double),fmt_double));
-  }
+  StoreFPR(FD,fmt_double,Negate(Add(Multiply(ValueFPR(FS,fmt_double),ValueFPR(FT,fmt_double),fmt_double),ValueFPR(FR,fmt_double),fmt_double),fmt_double));
 }
 
 
@@ -3939,15 +3851,8 @@
 *mipsV:
 *vr5000:
 {
-  unsigned32 instruction = instruction_0;
-  int destreg = ((instruction >> 6) & 0x0000001F);
-  int fs = ((instruction >> 11) & 0x0000001F);
-  int ft = ((instruction >> 16) & 0x0000001F);
-  int fr = ((instruction >> 21) & 0x0000001F);
   check_fpu(SD_);
-  {
-   StoreFPR(destreg,fmt_single,Negate(Add(Multiply(ValueFPR(fs,fmt_single),ValueFPR(ft,fmt_single),fmt_single),ValueFPR(fr,fmt_single),fmt_single),fmt_single));
-  }
+  StoreFPR(FD,fmt_single,Negate(Add(Multiply(ValueFPR(FS,fmt_single),ValueFPR(FT,fmt_single),fmt_single),ValueFPR(FR,fmt_single),fmt_single),fmt_single));
 }
 
 
@@ -3958,15 +3863,8 @@
 *mipsV:
 *vr5000:
 {
-  unsigned32 instruction = instruction_0;
-  int destreg = ((instruction >> 6) & 0x0000001F);
-  int fs = ((instruction >> 11) & 0x0000001F);
-  int ft = ((instruction >> 16) & 0x0000001F);
-  int fr = ((instruction >> 21) & 0x0000001F);
   check_fpu(SD_);
-  {
-   StoreFPR(destreg,fmt_double,Negate(Sub(Multiply(ValueFPR(fs,fmt_double),ValueFPR(ft,fmt_double),fmt_double),ValueFPR(fr,fmt_double),fmt_double),fmt_double));
-  }
+  StoreFPR(FD,fmt_double,Negate(Sub(Multiply(ValueFPR(FS,fmt_double),ValueFPR(FT,fmt_double),fmt_double),ValueFPR(FR,fmt_double),fmt_double),fmt_double));
 }
 
 
@@ -3977,15 +3875,8 @@
 *mipsV:
 *vr5000:
 {
-  unsigned32 instruction = instruction_0;
-  int destreg = ((instruction >> 6) & 0x0000001F);
-  int fs = ((instruction >> 11) & 0x0000001F);
-  int ft = ((instruction >> 16) & 0x0000001F);
-  int fr = ((instruction >> 21) & 0x0000001F);
   check_fpu(SD_);
-  {
-    StoreFPR(destreg,fmt_single,Negate(Sub(Multiply(ValueFPR(fs,fmt_single),ValueFPR(ft,fmt_single),fmt_single),ValueFPR(fr,fmt_single),fmt_single),fmt_single));
-  }
+  StoreFPR(FD,fmt_single,Negate(Sub(Multiply(ValueFPR(FS,fmt_single),ValueFPR(FT,fmt_single),fmt_single),ValueFPR(FR,fmt_single),fmt_single),fmt_single));
 }
 
 
@@ -3995,16 +3886,14 @@
 *mipsV:
 *vr5000:
 {
-  unsigned32 instruction = instruction_0;
-  int fs = ((instruction >> 11) & 0x0000001F);
-  signed_word op2 = GPR[((instruction >> 16) & 0x0000001F)];
-  signed_word op1 = GPR[((instruction >> 21) & 0x0000001F)];
+  address_word base = GPR[BASE];
+  address_word index = GPR[INDEX];
   {
-    address_word vaddr = ((unsigned64)op1 + (unsigned64)op2);
+    address_word vaddr = ((unsigned64)base + (unsigned64)index);
     address_word paddr;
     int uncached;
     if (AddressTranslation(vaddr,isDATA,isLOAD,&paddr,&uncached,isTARGET,isREAL))
-      Prefetch(uncached,paddr,vaddr,isDATA,fs);
+      Prefetch(uncached,paddr,vaddr,isDATA,HINT);
   }
 }
 
@@ -4014,16 +3903,13 @@
 *mipsV:
 *vr5000:
 {
-  unsigned32 instruction = instruction_0;
-  int destreg = ((instruction >> 6) & 0x0000001F);
-  int fs = ((instruction >> 11) & 0x0000001F);
-  int format = ((instruction >> 21) & 0x00000007);
+  int fmt = FMT;
   check_fpu(SD_);
   {
-  if ((format != fmt_single) && (format != fmt_double))
-   SignalException(ReservedInstruction,instruction);
+  if ((fmt != fmt_single) && (fmt != fmt_double))
+   SignalException(ReservedInstruction,instruction_0);
   else
-   StoreFPR(destreg,format,Recip(ValueFPR(fs,format),format));
+   StoreFPR(FD,fmt,Recip(ValueFPR(FS,fmt),fmt));
   }
 }
 
@@ -4037,16 +3923,13 @@
 *vr5000:
 *r3900:
 {
-  unsigned32 instruction = instruction_0;
-  int destreg = ((instruction >> 6) & 0x0000001F);
-  int fs = ((instruction >> 11) & 0x0000001F);
-  int format = ((instruction >> 21) & 0x00000007);
+  int fmt = FMT;
   check_fpu(SD_);
   {
-    if ((format != fmt_single) && (format != fmt_double))
-      SignalException(ReservedInstruction,instruction);
+    if ((fmt != fmt_single) && (fmt != fmt_double))
+      SignalException(ReservedInstruction,instruction_0);
     else
-      StoreFPR(destreg,fmt_long,Convert(FP_RM_NEAREST,ValueFPR(fs,format),format,fmt_long));
+      StoreFPR(FD,fmt_long,Convert(FP_RM_NEAREST,ValueFPR(FS,fmt),fmt,fmt_long));
   }
 }
 
@@ -4061,16 +3944,13 @@
 *vr5000:
 *r3900:
 {
-  unsigned32 instruction = instruction_0;
-  int destreg = ((instruction >> 6) & 0x0000001F);
-  int fs = ((instruction >> 11) & 0x0000001F);
-  int format = ((instruction >> 21) & 0x00000007);
+  int fmt = FMT;
   check_fpu(SD_);
   {
-  if ((format != fmt_single) && (format != fmt_double))
-   SignalException(ReservedInstruction,instruction);
+  if ((fmt != fmt_single) && (fmt != fmt_double))
+   SignalException(ReservedInstruction,instruction_0);
   else
-   StoreFPR(destreg,fmt_word,Convert(FP_RM_NEAREST,ValueFPR(fs,format),format,fmt_word));
+   StoreFPR(FD,fmt_word,Convert(FP_RM_NEAREST,ValueFPR(FS,fmt),fmt,fmt_word));
   }
 }
 
@@ -4081,16 +3961,13 @@
 "rsqrt.%s<FMT> f<FD>, f<FS>"
 *vr5000:
 {
-  unsigned32 instruction = instruction_0;
-  int destreg = ((instruction >> 6) & 0x0000001F);
-  int fs = ((instruction >> 11) & 0x0000001F);
-  int format = ((instruction >> 21) & 0x00000007);
+  int fmt = FMT;
   check_fpu(SD_);
   {
-  if ((format != fmt_single) && (format != fmt_double))
-   SignalException(ReservedInstruction,instruction);
+  if ((fmt != fmt_single) && (fmt != fmt_double))
+   SignalException(ReservedInstruction,instruction_0);
   else
-   StoreFPR(destreg,format,Recip(SquareRoot(ValueFPR(fs,format),format),format));
+   StoreFPR(FD,fmt,Recip(SquareRoot(ValueFPR(FS,fmt),fmt),fmt));
   }
 }
 
@@ -4132,16 +4009,13 @@
 *vr5000:
 *r3900:
 {
-  unsigned32 instruction = instruction_0;
-  int destreg = ((instruction >> 6) & 0x0000001F);
-  int fs = ((instruction >> 11) & 0x0000001F);
-  int format = ((instruction >> 21) & 0x00000007);
+  int fmt = FMT;
   check_fpu(SD_);
   {
-    if ((format != fmt_single) && (format != fmt_double))
-      SignalException(ReservedInstruction,instruction);
+    if ((fmt != fmt_single) && (fmt != fmt_double))
+      SignalException(ReservedInstruction,instruction_0);
     else
-      StoreFPR(destreg,format,(SquareRoot(ValueFPR(fs,format),format)));
+      StoreFPR(FD,fmt,(SquareRoot(ValueFPR(FS,fmt),fmt)));
   }
 }
 
@@ -4157,17 +4031,13 @@
 *vr5000:
 *r3900:
 {
-  unsigned32 instruction = instruction_0;
-  int destreg = ((instruction >> 6) & 0x0000001F);
-  int fs = ((instruction >> 11) & 0x0000001F);
-  int ft = ((instruction >> 16) & 0x0000001F);
-  int format = ((instruction >> 21) & 0x00000007);
+  int fmt = FMT;
   check_fpu(SD_);
   {
-    if ((format != fmt_single) && (format != fmt_double))
-      SignalException(ReservedInstruction,instruction);
+    if ((fmt != fmt_single) && (fmt != fmt_double))
+      SignalException(ReservedInstruction,instruction_0);
     else
-      StoreFPR(destreg,format,Sub(ValueFPR(fs,format),ValueFPR(ft,format),format));
+      StoreFPR(FD,fmt,Sub(ValueFPR(FS,fmt),ValueFPR(FT,fmt),fmt));
   }
 }
 
@@ -4184,13 +4054,10 @@
 *vr5000:
 *r3900:
 {
-  unsigned32 instruction = instruction_0;
   signed_word offset = EXTEND16 (OFFSET);
-  int destreg UNUSED = ((instruction >> 16) & 0x0000001F);
-  signed_word op1 UNUSED = GPR[((instruction >> 21) & 0x0000001F)];
   check_fpu(SD_);
   {
-    address_word vaddr = ((uword64)op1 + offset);
+    address_word vaddr = ((uword64)GPR[BASE] + offset);
     address_word paddr;
     int uncached;
     if ((vaddr & 3) != 0)
@@ -4209,7 +4076,7 @@
 	    unsigned int byte;
 	    paddr = ((paddr & ~mask) | ((paddr & mask) ^ reverseendian));
 	    byte = ((vaddr & mask) ^ bigendiancpu);
-	    memval = (((uword64)COP_SW(((instruction >> 26) & 0x3),destreg)) << (8 * byte));
+	    memval = (((uword64)COP_SW(((instruction_0 >> 26) & 0x3),FT)) << (8 * byte));
 	    StoreMemory(uncached,AccessLength_WORD,memval,memval1,paddr,vaddr,isREAL);
 	  }
       }
@@ -4223,14 +4090,13 @@
 *mipsV:
 *vr5000:
 {
-  unsigned32 instruction = instruction_0;
-  int fs = ((instruction >> 11) & 0x0000001F);
-  signed_word op2 = GPR[((instruction >> 16) & 0x0000001F)];
-  signed_word op1 = GPR[((instruction >> 21) & 0x0000001F)];
+
+  address_word base = GPR[BASE];
+  address_word index = GPR[INDEX];
   check_fpu(SD_);
   check_u64 (SD_, instruction_0);
   {
-   address_word vaddr = ((unsigned64)op1 + op2);
+   address_word vaddr = ((unsigned64)base + index);
    address_word paddr;
    int uncached;
    if ((vaddr & 3) != 0)
@@ -4247,7 +4113,7 @@
      unsigned int byte;
      paddr = ((paddr & ~mask) | ((paddr & mask) ^ (ReverseEndian << 2)));
      byte = ((vaddr & mask) ^ (BigEndianCPU << 2));
-     memval = (((unsigned64)COP_SW(1,fs)) << (8 * byte));
+     memval = (((unsigned64)COP_SW(1,FS)) << (8 * byte));
       {
        StoreMemory(uncached,AccessLength_WORD,memval,memval1,paddr,vaddr,isREAL);
       }
@@ -4266,16 +4132,13 @@
 *vr5000:
 *r3900:
 {
-  unsigned32 instruction = instruction_0;
-  int destreg = ((instruction >> 6) & 0x0000001F);
-  int fs = ((instruction >> 11) & 0x0000001F);
-  int format = ((instruction >> 21) & 0x00000007);
+  int fmt = FMT;
   check_fpu(SD_);
   {
-  if ((format != fmt_single) && (format != fmt_double))
-   SignalException(ReservedInstruction,instruction);
+  if ((fmt != fmt_single) && (fmt != fmt_double))
+   SignalException(ReservedInstruction,instruction_0);
   else
-   StoreFPR(destreg,fmt_long,Convert(FP_RM_TOZERO,ValueFPR(fs,format),format,fmt_long));
+   StoreFPR(FD,fmt_long,Convert(FP_RM_TOZERO,ValueFPR(FS,fmt),fmt,fmt_long));
   }
 }
 
@@ -4290,16 +4153,13 @@
 *vr5000:
 *r3900:
 {
-  unsigned32 instruction = instruction_0;
-  int destreg = ((instruction >> 6) & 0x0000001F);
-  int fs = ((instruction >> 11) & 0x0000001F);
-  int format = ((instruction >> 21) & 0x00000007);
+  int fmt = FMT;
   check_fpu(SD_);
   {
-  if ((format != fmt_single) && (format != fmt_double))
-   SignalException(ReservedInstruction,instruction);
+  if ((fmt != fmt_single) && (fmt != fmt_double))
+   SignalException(ReservedInstruction,instruction_0);
   else
-   StoreFPR(destreg,fmt_word,Convert(FP_RM_TOZERO,ValueFPR(fs,format),format,fmt_word));
+   StoreFPR(FD,fmt_word,Convert(FP_RM_TOZERO,ValueFPR(FS,fmt),fmt,fmt_word));
   }
 }
 
@@ -4371,16 +4231,14 @@
 *vr5000:
 *r3900:
 {
-  unsigned32 instruction = instruction_0;
-  signed_word offset = SIGNEXTEND((signed_word)((instruction >> 0) & 0x0000FFFF),16);
-  int hint = ((instruction >> 16) & 0x0000001F);
-  signed_word op1 = GPR[((instruction >> 21) & 0x0000001F)];
+  address_word base = GPR[BASE];
+  address_word offset = EXTEND16 (OFFSET);
   {
-    address_word vaddr = (op1 + offset);
+    address_word vaddr = (base + offset);
     address_word paddr;
     int uncached;
     if (AddressTranslation(vaddr,isDATA,isLOAD,&paddr,&uncached,isTARGET,isREAL))
-      CacheOp(hint,vaddr,paddr,instruction);
+      CacheOp(OP,vaddr,paddr,instruction_0);
   }
 }