avr-protos.c (jump_over_one_insn_p): New declaration.

	* config/avr/avr-protos.c (jump_over_one_insn_p): New declaration.
	* config/avr/avr.c (jump_over_one_insn_p): New function.
	* config/avr/avr.md: New peepholes added. Output test and
	conditional jump to "sbrc" or "sbrs" command.

From-SVN: r33855

gcc/ChangeLog

+Thu May 11 22:28:05 2000  Denis Chertykov  <denisc@overta.ru>
+
+	* config/avr/avr-protos.c (jump_over_one_insn_p): New declaration.
+	* config/avr/avr.c (jump_over_one_insn_p): New function.
+	* config/avr/avr.md: New peepholes added. Output test and
+	conditional jump to "sbrc" or "sbrs" command.
+
 2000-05-11  Mark Elbrecht  <snowball3@bigfoot.com>
 
 	* cppmain.c (main): Use IS_DIR_SEPARATOR.

gcc/config/avr/avr-protos.h

@@ -136,6 +136,7 @@ extern int    avr_jump_mode          PARAMS ((rtx x, rtx insn));
 extern int    byte_immediate_operand PARAMS ((register rtx op,
 					     enum machine_mode mode));
 extern int    test_hard_reg_class    PARAMS ((enum reg_class class, rtx x));
+extern int    jump_over_one_insn_p   PARAMS ((rtx insn, rtx dest));
 
 #endif /* RTX_CODE */
 

gcc/config/avr/avr.c

@@ -3870,3 +3870,15 @@ debug_hard_reg_set (HARD_REG_SET set)
   fprintf (stderr, "\n");
 }
 
+int
+jump_over_one_insn_p (insn, dest)
+     rtx insn;
+     rtx dest;
+{
+  int uid = INSN_UID (GET_CODE (dest) == LABEL_REF
+		      ? XEXP (dest, 0)
+		      : dest);
+  int jump_addr = insn_addresses[INSN_UID (insn)];
+  int dest_addr = insn_addresses[uid];
+  return dest_addr - jump_addr == 2;
+}

gcc/config/avr/avr.md

@@ -1832,3 +1832,56 @@
           AS1 (jmp,%1));
 }")
 					
+(define_peephole
+  [(set (cc0) (match_operand:QI 0 "register_operand" ""))
+   (set (pc)
+	(if_then_else (lt (cc0) (const_int 0))
+		      (label_ref (match_operand 1 "" ""))
+		      (pc)))]
+  "jump_over_one_insn_p (insn, operands[1])"
+  "sbrs %0,7")
+
+(define_peephole
+  [(set (cc0) (match_operand:QI 0 "register_operand" ""))
+   (set (pc)
+	(if_then_else (ge (cc0) (const_int 0))
+		      (label_ref (match_operand 1 "" ""))
+		      (pc)))]
+  "jump_over_one_insn_p (insn, operands[1])"
+  "sbrc %0,7")
+					
+(define_peephole
+  [(set (cc0) (match_operand:HI 0 "register_operand" ""))
+   (set (pc)
+	(if_then_else (lt (cc0) (const_int 0))
+		      (label_ref (match_operand 1 "" ""))
+		      (pc)))]
+  "jump_over_one_insn_p (NEXT_INSN (insn), operands[1])"
+  "sbrs %B0,7")
+
+(define_peephole
+  [(set (cc0) (match_operand:HI 0 "register_operand" ""))
+   (set (pc)
+	(if_then_else (ge (cc0) (const_int 0))
+		      (label_ref (match_operand 1 "" ""))
+		      (pc)))]
+  "jump_over_one_insn_p (insn, operands[1])"
+  "sbrc %B0,7")
+
+(define_peephole
+  [(set (cc0) (match_operand:SI 0 "register_operand" ""))
+   (set (pc)
+	(if_then_else (lt (cc0) (const_int 0))
+		      (label_ref (match_operand 1 "" ""))
+		      (pc)))]
+  "jump_over_one_insn_p (NEXT_INSN (insn), operands[1])"
+  "sbrs %D0,7")
+
+(define_peephole
+  [(set (cc0) (match_operand:SI 0 "register_operand" ""))
+   (set (pc)
+	(if_then_else (ge (cc0) (const_int 0))
+		      (label_ref (match_operand 1 "" ""))
+		      (pc)))]
+  "jump_over_one_insn_p (insn, operands[1])"
+  "sbrc %D0,7")