+2010-07-07 H.J. Lu <hongjiu.lu@intel.com>
+
+ PR target/44844
+ * config/i386/i386.md (rdrand<mode>): Changed to expand to
+ retry if the carry flag isn't valid.
+ (rdrand<mode>_1): New.
+
2010-07-07 Richard Guenther <rguenther@suse.de>
PR middle-end/44790
[(set_attr "type" "other")
(set_attr "prefix_extra" "2")])
-(define_insn "rdrand<mode>"
+(define_expand "rdrand<mode>"
+ [(set (match_operand:SWI248 0 "register_operand" "=r")
+ (unspec_volatile:SWI248 [(const_int 0)] UNSPECV_RDRAND))]
+ "TARGET_RDRND"
+{
+ rtx retry_label, insn, ccc;
+
+ retry_label = gen_label_rtx ();
+
+ emit_label (retry_label);
+
+ /* Generate rdrand. */
+ emit_insn (gen_rdrand<mode>_1 (operands[0]));
+
+ /* Retry if the carry flag isn't valid. */
+ ccc = gen_rtx_REG (CCCmode, FLAGS_REG);
+ ccc = gen_rtx_EQ (VOIDmode, ccc, const0_rtx);
+ ccc = gen_rtx_IF_THEN_ELSE (VOIDmode, ccc, pc_rtx,
+ gen_rtx_LABEL_REF (VOIDmode, retry_label));
+ insn = emit_jump_insn (gen_rtx_SET (VOIDmode, pc_rtx, ccc));
+ JUMP_LABEL (insn) = retry_label;
+
+ DONE;
+})
+
+(define_insn "rdrand<mode>_1"
[(set (match_operand:SWI248 0 "register_operand" "=r")
(unspec_volatile:SWI248 [(const_int 0)] UNSPECV_RDRAND))]
"TARGET_RDRND"
+2010-07-07 H.J. Lu <hongjiu.lu@intel.com>
+
+ PR target/44844
+ * gcc.target/i386/rdrand-1.c: Scan "jnc".
+ * gcc.target/i386/rdrand-2.c: Likewise.
+ * gcc.target/i386/rdrand-3.c: Likewise.
+
2010-07-07 Jan Hubicka <jh@suse.cz>
PR middle-end/44813