X-Git-Url: http://git.sourceforge.jp/view?p=pf3gnuchains%2Fgcc-fork.git;a=blobdiff_plain;f=gcc%2Fconfig%2Fi386%2Fi386.md;h=39d542dd6cef093e0451be5aa756fd4bfdeda10d;hp=0b1d153af38ceb181f137d07ff9e31956d08e2f9;hb=eb6e0f89020fbe1457af2af310cb6dd51f813f22;hpb=2c202fa147536c7b6e3b6d2320264af6eea54576;ds=sidebyside

diff --git a/gcc/config/i386/i386.md b/gcc/config/i386/i386.md
index 0b1d153af38..39d542dd6ce 100644
--- a/gcc/config/i386/i386.md
+++ b/gcc/config/i386/i386.md
@@ -3521,7 +3521,17 @@
   /* ??? Needed for compress_float_constant since all fp constants
      are LEGITIMATE_CONSTANT_P.  */
   if (GET_CODE (operands[1]) == CONST_DOUBLE)
-    operands[1] = validize_mem (force_const_mem (SFmode, operands[1]));
+    {
+      if ((!TARGET_SSE2 || TARGET_MIX_SSE_I387)
+	  && standard_80387_constant_p (operands[1]) > 0)
+	{
+	  operands[1] = simplify_const_unary_operation
+	    (FLOAT_EXTEND, DFmode, operands[1], SFmode);
+	  emit_move_insn_1 (operands[0], operands[1]);
+	  DONE;
+	}
+      operands[1] = validize_mem (force_const_mem (SFmode, operands[1]));
+    }
   if (GET_CODE (operands[0]) == MEM && GET_CODE (operands[1]) == MEM)
     operands[1] = force_reg (SFmode, operands[1]);
 })
@@ -3594,7 +3604,16 @@
   /* ??? Needed for compress_float_constant since all fp constants
      are LEGITIMATE_CONSTANT_P.  */
   if (GET_CODE (operands[1]) == CONST_DOUBLE)
-    operands[1] = validize_mem (force_const_mem (SFmode, operands[1]));
+    {
+      if (standard_80387_constant_p (operands[1]) > 0)
+	{
+	  operands[1] = simplify_const_unary_operation
+	    (FLOAT_EXTEND, XFmode, operands[1], SFmode);
+	  emit_move_insn_1 (operands[0], operands[1]);
+	  DONE;
+	}
+      operands[1] = validize_mem (force_const_mem (SFmode, operands[1]));
+    }
   if (GET_CODE (operands[0]) == MEM && GET_CODE (operands[1]) == MEM)
     operands[1] = force_reg (SFmode, operands[1]);
 })
@@ -3633,7 +3652,16 @@
   /* ??? Needed for compress_float_constant since all fp constants
      are LEGITIMATE_CONSTANT_P.  */
   if (GET_CODE (operands[1]) == CONST_DOUBLE)
-    operands[1] = validize_mem (force_const_mem (DFmode, operands[1]));
+    {
+      if (standard_80387_constant_p (operands[1]) > 0)
+	{
+	  operands[1] = simplify_const_unary_operation
+	    (FLOAT_EXTEND, XFmode, operands[1], DFmode);
+	  emit_move_insn_1 (operands[0], operands[1]);
+	  DONE;
+	}
+      operands[1] = validize_mem (force_const_mem (DFmode, operands[1]));
+    }
   if (GET_CODE (operands[0]) == MEM && GET_CODE (operands[1]) == MEM)
     operands[1] = force_reg (DFmode, operands[1]);
 })