m68k.c (m68k_output_compare_fp): Restore differences between Coldfire and regular m68k.

	* config/m68k/m68k.c (m68k_output_compare_fp): Restore differences
	between Coldfire and regular m68k.
	* config/m68k/m68k.md (cmp1_cf_constraints): Disallow constants.

From-SVN: r278767

gcc/ChangeLog

+2019-11-27  Bernd Schmidt  <bernds_cb1@t-online.de>
+
+	* config/m68k/m68k.c (m68k_output_compare_fp): Restore differences
+	between Coldfire and regular m68k.
+	* config/m68k/m68k.md (cmp1_cf_constraints): Disallow constants.
+
 2019-11-27  Richard Biener  <rguenther@suse.de>
 
 	* target.def (TARGET_VECTORIZE_BUILTIN_CONVERSION): Remove.

gcc/config/m68k/m68k.c

@@ -4501,7 +4501,12 @@ m68k_output_compare_fp (rtx op0, rtx op1, rtx_code code)
   if (op1 == CONST0_RTX (GET_MODE (op0)))
     {
       if (FP_REG_P (op0))
-	output_asm_insn ("ftst%.x %0", ops);
+	{
+	  if (TARGET_COLDFIRE_FPU)
+	    output_asm_insn ("ftst%.d %0", ops);
+	  else
+	    output_asm_insn ("ftst%.x %0", ops);
+	}
       else
 	output_asm_insn (("ftst%." + prec + " %0").c_str (), ops);
       return code;
@@ -4510,7 +4515,10 @@ m68k_output_compare_fp (rtx op0, rtx op1, rtx_code code)
   switch (which_alternative)
     {
     case 0:
-      output_asm_insn ("fcmp%.x %1,%0", ops);
+      if (TARGET_COLDFIRE_FPU)
+	output_asm_insn ("fcmp%.d %1,%0", ops);
+      else
+	output_asm_insn ("fcmp%.x %1,%0", ops);
       break;
     case 1:
       output_asm_insn (("fcmp%." + prec + " %f1,%0").c_str (), ops);

gcc/config/m68k/m68k.md

@@ -496,7 +496,7 @@
 ;; needs to be reloaded.
 
 (define_mode_attr scc0_cf_constraints [(QI "=d") (HI "=d") (SI "=d,d,d")])
-(define_mode_attr cmp1_cf_constraints [(QI "dm") (HI "dm") (SI "mrKs,r,rm")])
+(define_mode_attr cmp1_cf_constraints [(QI "dm") (HI "dm") (SI "mr,r,rm")])
 (define_mode_attr cmp2_cf_constraints [(QI "C0") (HI "C0") (SI "r,mrKs,C0")])
 (define_mode_attr cmp2_cf_predicate [(QI "const0_operand") (HI "const0_operand") (SI "general_operand")])