mips.h (ISA_HAS_64BIT_REGS,ISA_HAS_BRANCHLIKELY, [...]): New.

	* config/mips/mips.h (ISA_HAS_64BIT_REGS,ISA_HAS_BRANCHLIKELY,
	ISA_HAS_FP4,ISA_HAS_CONDMOVE): New.
	(GENERATE_BRANCHLIKELY,HAVE_SQRT_P,
	CONDITIONAL_REGISTER_USEAGE): Use them.
	* config/mips/mips.c (mips_move_1word,mips_move_2words,
	gen_conditional_branch,override_options) : Use them.
	* config/mips/mips.md : Use them.

From-SVN: r30199

gcc/ChangeLog

+1999-10-26  Gavin Romig-Koch  <gavin@cygnus.com>
+
+	* config/mips/mips.h (ISA_HAS_64BIT_REGS,ISA_HAS_BRANCHLIKELY,
+	ISA_HAS_FP4,ISA_HAS_CONDMOVE): New.
+	(GENERATE_BRANCHLIKELY,HAVE_SQRT_P,
+	CONDITIONAL_REGISTER_USEAGE): Use them. 
+	* config/mips/mips.c (mips_move_1word,mips_move_2words,
+	gen_conditional_branch,override_options) : Use them.
+	* config/mips/mips.md : Use them.
+
 Tue Oct 26 13:09:23 1999  Richard Henderson  <rth@cygnus.com>
 
 	* i386.md (zero_extendqihi2): Use SImode register name with andl.

gcc/config/mips/mips.c

@@ -1719,7 +1719,7 @@ mips_move_1word (operands, insn, unsignedp)
 		    ret = "mflo\t%0";
 		}
 
-	      else if (ST_REG_P (regno1) && mips_isa >= 4)
+	      else if (ST_REG_P (regno1) && ISA_HAS_FP4)
 		ret = "li\t%0,1\n\tmovf\t%0,%.,%1";
 
 	      else
@@ -1728,7 +1728,7 @@ mips_move_1word (operands, insn, unsignedp)
 		  if (FP_REG_P (regno1))
 		    ret = "mfc1\t%0,%1";
 
-		  else if (regno1 == FPSW_REGNUM && mips_isa < 4)
+		  else if (regno1 == FPSW_REGNUM && ! ISA_HAS_FP4)
 		    ret = "cfc1\t%0,$31";
 		}
 	    }
@@ -1755,7 +1755,7 @@ mips_move_1word (operands, insn, unsignedp)
 		}
 	    }
 
-	  else if (regno0 == FPSW_REGNUM && mips_isa < 4)
+	  else if (regno0 == FPSW_REGNUM && ! ISA_HAS_FP4)
 	    {
 	      if (GP_REG_P (regno1))
 		{
@@ -2218,7 +2218,9 @@ mips_move_2words (operands, insn)
 		       or higher.  For !TARGET_64BIT && gp registers we
 		       need to avoid this by using two li instructions
 		       instead.  */
-		    if (mips_isa >= 3 && !TARGET_64BIT && !FP_REG_P (regno0))
+		    if (ISA_HAS_64BIT_REGS 
+			&& ! TARGET_64BIT
+			&& ! FP_REG_P (regno0))
 		      {
 			split_double (op1, operands + 2, operands + 3);
 			ret = "li\t%0,%2\n\tli\t%D0,%3";
@@ -2871,7 +2873,7 @@ gen_conditional_branch (operands, test_code)
 
     case CMP_SF:
     case CMP_DF:
-      if (mips_isa < 4)
+      if (! ISA_HAS_FP4)
 	reg = gen_rtx_REG (CCmode, FPSW_REGNUM);
       else
 	reg = gen_reg_rtx (CCmode);
@@ -4363,7 +4365,7 @@ override_options ()
   if (mips_abi_string == 0 && mips_isa_string 
       && mips_abi != ABI_EABI && mips_abi != ABI_O64)
     {
-      if (mips_isa <= 2)
+      if (! ISA_HAS_64BIT_REGS)
 	mips_abi = ABI_32;
       else
 	mips_abi = ABI_64;
@@ -4384,9 +4386,9 @@ override_options ()
   /* If both ABI and ISA were specified, check for conflicts.  */
   else if (mips_isa_string && mips_abi_string)
     {
-      if ((mips_isa <= 2 && (mips_abi == ABI_N32 || mips_abi == ABI_64
+      if ((! ISA_HAS_64BIT_REGS && (mips_abi == ABI_N32 || mips_abi == ABI_64
 			     || mips_abi == ABI_O64))
-	  || (mips_isa >= 3 && mips_abi == ABI_32))
+	  || (ISA_HAS_64BIT_REGS && mips_abi == ABI_32))
 	error ("-mabi=%s does not support -mips%d", mips_abi_string, mips_isa);
     }
 
@@ -4535,24 +4537,24 @@ override_options ()
 	}
     }
 
-  if ((mips_cpu == PROCESSOR_R3000 && mips_isa > 1)
-      || (mips_cpu == PROCESSOR_R6000 && mips_isa > 2)
+  if ((mips_cpu == PROCESSOR_R3000 && (mips_isa != 1))
+      || (mips_cpu == PROCESSOR_R6000 && mips_isa != 1 && mips_isa != 2)
       || ((mips_cpu == PROCESSOR_R4000
            || mips_cpu == PROCESSOR_R4100
            || mips_cpu == PROCESSOR_R4300
 	   || mips_cpu == PROCESSOR_R4600
 	   || mips_cpu == PROCESSOR_R4650)
-	  && mips_isa > 3))
+	  && mips_isa != 1 && mips_isa != 2 && mips_isa != 3))
     error ("-mcpu=%s does not support -mips%d", mips_cpu_string, mips_isa);
 
   /* make sure sizes of ints/longs/etc. are ok */
-  if (mips_isa < 3)
+  if (! ISA_HAS_64BIT_REGS)
     {
       if (TARGET_FLOAT64)
-	fatal ("Only MIPS-III or MIPS-IV CPUs can support 64 bit fp registers");
+	fatal ("-mips%d does not support 64 bit fp registers", mips_isa);
 
       else if (TARGET_64BIT)
-	fatal ("Only MIPS-III or MIPS-IV CPUs can support 64 bit gp registers");
+	fatal ("-mips%d does not support 64 bit gp registers", mips_isa);
     }
 
   if (mips_abi != ABI_32 && mips_abi != ABI_O64)
@@ -4731,7 +4733,7 @@ override_options ()
 
 	  if (mode == CCmode)
 	    {
-	      if (mips_isa < 4)
+	      if (! ISA_HAS_FP4)
 		temp = (regno == FPSW_REGNUM);
 	      else
 		temp = (ST_REG_P (regno) || GP_REG_P (regno)

gcc/config/mips/mips.h

@@ -542,7 +542,7 @@ extern void		sbss_section PARAMS ((void));
 /* This is meant to be redefined in the host dependent files.  */
 #define SUBTARGET_TARGET_OPTIONS
 
-#define GENERATE_BRANCHLIKELY  (!TARGET_MIPS16 && (TARGET_MIPS3900 || (mips_isa >= 2)))
+#define GENERATE_BRANCHLIKELY  (!TARGET_MIPS16 && (TARGET_MIPS3900 || ISA_HAS_BRANCHLIKELY))
 
 /* Generate three-operand multiply instructions for both SImode and DImode.  */
 #define GENERATE_MULT3         (TARGET_MIPS3900				\
@@ -552,7 +552,19 @@ extern void		sbss_section PARAMS ((void));
    depending on the instruction set architecture level.  */
 
 #define BRANCH_LIKELY_P()	GENERATE_BRANCHLIKELY
-#define HAVE_SQRT_P()		(mips_isa >= 2)
+#define HAVE_SQRT_P()		(mips_isa != 1)
+
+/* ISA has instructions for managing 64 bit fp and gp regs (eg. mips3). */
+#define ISA_HAS_64BIT_REGS	(mips_isa == 3 || mips_isa == 4 || mips_isa == 64)
+
+/* ISA has branch likely instructions (eg. mips2). */ 
+#define ISA_HAS_BRANCHLIKELY	(mips_isa != 1)
+
+/* ISA has the FP instructions introduced in mips4. */
+#define ISA_HAS_FP4             (mips_isa == 4)
+
+/* ISA has the non-FP conditional move instructions introduced in mips4. */
+#define ISA_HAS_CONDMOVE        (mips_isa == 4)
 
 /* CC1_SPEC causes -mips3 and -mips4 to set -mfp64 and -mgp64; -mips1 or
    -mips2 sets -mfp32 and -mgp32.  This can be overridden by an explicit
@@ -622,7 +634,7 @@ do									\
 	for (regno = ST_REG_FIRST; regno <= ST_REG_LAST; regno++)	\
 	  fixed_regs[regno] = call_used_regs[regno] = 1;		\
       }									\
-    else if (mips_isa < 4)						\
+    else if (! ISA_HAS_FP4)						\
       {									\
 	int regno;							\
 									\