i386.c (ix86_emit_fp_unordered_jump): Use testb $4, %ah insn instead of sahf…

i386.c (ix86_emit_fp_unordered_jump): Use testb $4, %ah insn instead of sahf insn if !TARGET_USE_SAHF.

2004-05-07  Uros Bizjak  <uros@kss-loka.si>

	* config/i386/i386.c (ix86_emit_fp_unordered_jump): Use
	testb $4, %ah insn instead of sahf insn if !TARGET_USE_SAHF.

From-SVN: r81620

gcc/ChangeLog

+2004-05-07  Uros Bizjak  <uros@kss-loka.si>
+
+	* config/i386/i386.c (ix86_emit_fp_unordered_jump): Use
+	testb $4, %ah insn instead of sahf insn if !TARGET_USE_SAHF.
+
 2004-05-07  Andrew Pinski  <pinskia@physics.uc.edu>
 
 	* loop-doloop.c (doloop_valid_p): Make sure that body
@@ -75,6 +80,7 @@
 	(STACK_BOUNDARY): Delete.
 
 2004-05-06  Stuart Hastings  <stuart@apple.com>
+
 	* gcc/doc/invoke.texi: Restore -fgcse-after-reload doc from 1.421,
 	mistakenly clobbered by 1.423.
 

gcc/config/i386/i386.c

@@ -15938,10 +15938,22 @@ ix86_emit_fp_unordered_jump (rtx label)
   rtx temp;
 
   emit_insn (gen_x86_fnstsw_1 (reg));
-  emit_insn (gen_x86_sahf_1 (reg));
+
+  if (TARGET_USE_SAHF)
+    {
+      emit_insn (gen_x86_sahf_1 (reg));
+
+      temp = gen_rtx_REG (CCmode, FLAGS_REG); 
+      temp = gen_rtx_UNORDERED (VOIDmode, temp, const0_rtx);
+    }
+  else
+    {
+      emit_insn (gen_testqi_ext_ccno_0 (reg, GEN_INT (0x04)));
+
+      temp = gen_rtx_REG (CCNOmode, FLAGS_REG); 
+      temp = gen_rtx_NE (VOIDmode, temp, const0_rtx);
+    }
   
-  temp = gen_rtx_REG (CCmode, FLAGS_REG); 
-  temp = gen_rtx_UNORDERED (VOIDmode, temp, const0_rtx);
   temp = gen_rtx_IF_THEN_ELSE (VOIDmode, temp,
 			      gen_rtx_LABEL_REF (VOIDmode, label),
 			      pc_rtx);