Index: config/sparc/predicates.md
===================================================================
--- config/sparc/predicates.md	(revision 241326)
+++ config/sparc/predicates.md	(working copy)
@@ -420,6 +420,10 @@ (define_predicate "nz_comparison_operato
 (define_predicate "c_comparison_operator"
   (match_code "ltu,geu"))
 
+;; Return true if OP is a valid comparison operator for CCVmode.
+(define_predicate "v_comparison_operator"
+  (match_code "eq,ne"))
+
 ;; Return true if OP is an integer comparison operator.  This allows
 ;; the use of MATCH_OPERATOR to recognize all the branch insns.
 (define_predicate "icc_comparison_operator"
@@ -436,6 +440,9 @@ (define_predicate "icc_comparison_operat
     case CCCmode:
     case CCXCmode:
       return c_comparison_operator (op, mode);
+    case CCVmode:
+    case CCXVmode:
+      return v_comparison_operator (op, mode);
     default:
       return false;
     }
Index: config/sparc/sparc-modes.def
===================================================================
--- config/sparc/sparc-modes.def	(revision 241326)
+++ config/sparc/sparc-modes.def	(working copy)
@@ -34,6 +34,10 @@ FLOAT_MODE (TF, 16, ieee_quad_format);
    they explicitly set the C flag (unsigned overflow).  Only the unsigned
    <,>= operators can be used in conjunction with it.
 
+   We also have a CCVmode which is used by the arithmetic instructions when
+   they explicitly set the V flag (signed overflow).  Only the =,!= operators
+   can be used in conjunction with it.
+
    We also have two modes to indicate that the relevant condition code is
    in the floating-point condition code register.  One for comparisons which
    will generate an exception if the result is unordered (CCFPEmode) and
@@ -46,6 +50,8 @@ CC_MODE (CCNZ);
 CC_MODE (CCXNZ);
 CC_MODE (CCC);
 CC_MODE (CCXC);
+CC_MODE (CCV);
+CC_MODE (CCXV);
 CC_MODE (CCFP);
 CC_MODE (CCFPE);
 
Index: config/sparc/sparc.c
===================================================================
--- config/sparc/sparc.c	(revision 241326)
+++ config/sparc/sparc.c	(working copy)
@@ -2784,8 +2784,9 @@ select_cc_mode (enum rtx_code op, rtx x,
 	  gcc_unreachable ();
 	}
     }
-  else if (GET_CODE (x) == PLUS || GET_CODE (x) == MINUS
-	   || GET_CODE (x) == NEG || GET_CODE (x) == ASHIFT)
+  else if ((GET_CODE (x) == PLUS || GET_CODE (x) == MINUS
+	    || GET_CODE (x) == NEG || GET_CODE (x) == ASHIFT)
+	   && y == const0_rtx)
     {
       if (TARGET_ARCH64 && GET_MODE (x) == DImode)
 	return CCXNZmode;
@@ -2803,6 +2804,18 @@ select_cc_mode (enum rtx_code op, rtx x,
 	    return CCCmode;
 	}
 
+      /* This is for the [u]addvdi4_sp32 and [u]subvdi4_sp32 patterns.  */
+      if (!TARGET_ARCH64 && GET_MODE (x) == DImode)
+	{
+	  if (GET_CODE (y) == UNSPEC
+	      && (XINT (y, 1) == UNSPEC_ADDV
+		 || XINT (y, 1) == UNSPEC_SUBV
+	         || XINT (y, 1) == UNSPEC_NEGV))
+	    return CCVmode;
+	  else
+	    return CCCmode;
+	}
+
       if (TARGET_ARCH64 && GET_MODE (x) == DImode)
 	return CCXmode;
       else
@@ -7724,10 +7737,16 @@ output_cbranch (rtx op, rtx dest, int la
       switch (code)
 	{
 	case NE:
-	  branch = "bne";
+	  if (mode == CCVmode || mode == CCXVmode)
+	    branch = "bvs";
+	  else
+	    branch = "bne";
 	  break;
 	case EQ:
-	  branch = "be";
+	  if (mode == CCVmode || mode == CCXVmode)
+	    branch = "bvc";
+	  else
+	    branch = "be";
 	  break;
 	case GE:
 	  if (mode == CCNZmode || mode == CCXNZmode)
@@ -7794,6 +7813,7 @@ output_cbranch (rtx op, rtx dest, int la
 	case CCmode:
 	case CCNZmode:
 	case CCCmode:
+	case CCVmode:
 	  labelno = "%%icc, ";
 	  if (v8)
 	    labelno = "";
@@ -7801,6 +7821,7 @@ output_cbranch (rtx op, rtx dest, int la
 	case CCXmode:
 	case CCXNZmode:
 	case CCXCmode:
+	case CCXVmode:
 	  labelno = "%%xcc, ";
 	  gcc_assert (!v8);
 	  break;
@@ -8804,11 +8825,13 @@ sparc_print_operand (FILE *file, rtx x,
 	    case CCmode:
 	    case CCNZmode:
 	    case CCCmode:
+	    case CCVmode:
 	      s = "%icc";
 	      break;
 	    case CCXmode:
 	    case CCXNZmode:
 	    case CCXCmode:
+	    case CCXVmode:
 	      s = "%xcc";
 	      break;
 	    default:
@@ -8883,10 +8906,16 @@ sparc_print_operand (FILE *file, rtx x,
 	switch (GET_CODE (x))
 	  {
 	  case NE:
-	    s = "ne";
+	    if (mode == CCVmode || mode == CCXVmode)
+	      s = "vs";
+	    else
+	      s = "ne";
 	    break;
 	  case EQ:
-	    s = "e";
+	    if (mode == CCVmode || mode == CCXVmode)
+	      s = "vc";
+	    else
+	      s = "e";
 	    break;
 	  case GE:
 	    if (mode == CCNZmode || mode == CCXNZmode)
Index: config/sparc/sparc.md
===================================================================
--- config/sparc/sparc.md	(revision 241326)
+++ config/sparc/sparc.md	(working copy)
@@ -92,6 +92,10 @@ (define_c_enum "unspec" [
   UNSPEC_MUL8
   UNSPEC_MUL8SU
   UNSPEC_MULDSU
+
+  UNSPEC_ADDV
+  UNSPEC_SUBV
+  UNSPEC_NEGV
 ])
 
 (define_c_enum "unspecv" [
@@ -3714,6 +3718,51 @@ (define_expand "adddi3"
     }
 })
 
+(define_expand "uaddvdi4"
+  [(parallel [(set (reg:CCXC CC_REG)
+		   (compare:CCXC (plus:DI (match_operand:DI 1 "register_operand")
+					  (match_operand:DI 2 "arith_add_operand"))
+			         (match_dup 1)))
+	      (set (match_operand:DI 0 "register_operand")
+		   (plus:DI (match_dup 1) (match_dup 2)))])
+   (set (pc) (if_then_else (ltu (reg:CCXC CC_REG) (const_int 0))
+			   (label_ref (match_operand 3))
+			   (pc)))]
+ ""
+{
+  if (!TARGET_64BIT)
+    {
+      emit_insn (gen_uaddvdi4_sp32 (operands[0], operands[1], operands[2]));
+      rtx x = gen_rtx_LTU (VOIDmode, gen_rtx_REG (CCCmode, SPARC_ICC_REG),
+				     const0_rtx);
+      emit_jump_insn (gen_cbranchcc4 (x, XEXP (x, 0), XEXP (x, 1), operands[3]));
+      DONE;
+    }
+})
+
+(define_expand "addvdi4"
+  [(parallel [(set (reg:CCXV CC_REG)
+		   (compare:CCXV (plus:DI (match_operand:DI 1 "register_operand")
+					  (match_operand:DI 2 "arith_add_operand"))
+			         (unspec:DI [(match_dup 1) (match_dup 2)]
+					    UNSPEC_ADDV)))
+	      (set (match_operand:DI 0 "register_operand")
+		   (plus:DI (match_dup 1) (match_dup 2)))])
+   (set (pc) (if_then_else (ne (reg:CCXV CC_REG) (const_int 0))
+			   (label_ref (match_operand 3))
+			   (pc)))]
+ ""
+{
+  if (!TARGET_64BIT)
+    {
+      emit_insn (gen_addvdi4_sp32 (operands[0], operands[1], operands[2]));
+      rtx x = gen_rtx_NE (VOIDmode, gen_rtx_REG (CCVmode, SPARC_ICC_REG),
+				    const0_rtx);
+      emit_jump_insn (gen_cbranchcc4 (x, XEXP (x, 0), XEXP (x, 1), operands[3]));
+      DONE;
+    }
+})
+
 (define_insn_and_split "adddi3_sp32"
   [(set (match_operand:DI 0 "register_operand" "=&r")
 	(plus:DI (match_operand:DI 1 "register_operand" "%r")
@@ -3740,6 +3789,80 @@ (define_insn_and_split "adddi3_sp32"
 }
   [(set_attr "length" "2")])
 
+(define_insn_and_split "uaddvdi4_sp32"
+  [(set (reg:CCC CC_REG)
+	(compare:CCC (plus:DI (match_operand:DI 1 "register_operand" "%r")
+			      (match_operand:DI 2 "arith_double_operand" "rHI"))
+		     (match_dup 1)))
+   (set (match_operand:DI 0 "register_operand" "=&r")
+	(plus:DI (match_dup 1) (match_dup 2)))]
+  "!TARGET_ARCH64"
+  "#"
+  "&& reload_completed"
+  [(parallel [(set (reg:CCC CC_REG)
+		   (compare:CCC (plus:SI (match_dup 4) (match_dup 5))
+				(match_dup 4)))
+	      (set (match_dup 3)
+		   (plus:SI (match_dup 4) (match_dup 5)))])
+   (parallel [(set (reg:CCC CC_REG)
+		   (compare:CCC (zero_extend:DI
+				  (plus:SI (plus:SI (match_dup 7) (match_dup 8))
+					   (ltu:SI (reg:CCC CC_REG)
+						   (const_int 0))))
+				(plus:DI (plus:DI (zero_extend:DI (match_dup 7))
+						  (zero_extend:DI (match_dup 8)))
+					 (ltu:DI (reg:CCC CC_REG)
+						 (const_int 0)))))
+	      (set (match_dup 6)
+		   (plus:SI (plus:SI (match_dup 7) (match_dup 8))
+			    (ltu:SI (reg:CCC CC_REG)
+				    (const_int 0))))])]
+{
+  operands[3] = gen_lowpart (SImode, operands[0]);
+  operands[4] = gen_lowpart (SImode, operands[1]);
+  operands[5] = gen_lowpart (SImode, operands[2]);
+  operands[6] = gen_highpart (SImode, operands[0]);
+  operands[7] = gen_highpart_mode (SImode, DImode, operands[1]);
+  operands[8] = gen_highpart_mode (SImode, DImode, operands[2]);
+}
+  [(set_attr "length" "2")])
+
+(define_insn_and_split "addvdi4_sp32"
+  [(set (reg:CCV CC_REG)
+	(compare:CCV (plus:DI (match_operand:DI 1 "register_operand" "%r")
+			      (match_operand:DI 2 "arith_double_operand" "rHI"))
+		     (unspec:DI [(match_dup 1) (match_dup 2)] UNSPEC_ADDV)))
+   (set (match_operand:DI 0 "register_operand" "=&r")
+	(plus:DI (match_dup 1) (match_dup 2)))]
+  "!TARGET_ARCH64"
+  "#"
+  "&& reload_completed"
+  [(parallel [(set (reg:CCC CC_REG)
+		   (compare:CCC (plus:SI (match_dup 4) (match_dup 5))
+				(match_dup 4)))
+	      (set (match_dup 3)
+		   (plus:SI (match_dup 4) (match_dup 5)))])
+   (parallel [(set (reg:CCV CC_REG)
+		   (compare:CCV (plus:SI (plus:SI (match_dup 7) (match_dup 8))
+					 (ltu:SI (reg:CCC CC_REG)
+						 (const_int 0)))
+				(unspec:SI [(plus:SI (match_dup 7) (match_dup 8))
+					    (ltu:SI (reg:CCC CC_REG)
+						     (const_int 0))]
+					   UNSPEC_ADDV)))
+	      (set (match_dup 6)
+		   (plus:SI (plus:SI (match_dup 7) (match_dup 8))
+			    (ltu:SI (reg:CCC CC_REG) (const_int 0))))])]
+{
+  operands[3] = gen_lowpart (SImode, operands[0]);
+  operands[4] = gen_lowpart (SImode, operands[1]);
+  operands[5] = gen_lowpart (SImode, operands[2]);
+  operands[6] = gen_highpart (SImode, operands[0]);
+  operands[7] = gen_highpart_mode (SImode, DImode, operands[1]);
+  operands[8] = gen_highpart_mode (SImode, DImode, operands[2]);
+}
+  [(set_attr "length" "2")])
+
 (define_insn_and_split "*addx_extend_sp32"
   [(set (match_operand:DI 0 "register_operand" "=r")
 	(zero_extend:DI (plus:SI (plus:SI
@@ -3797,6 +3920,31 @@ (define_insn "addsi3"
   [(set_attr "type" "*,*")
    (set_attr "fptype" "*,*")])
 
+(define_expand "uaddvsi4"
+  [(parallel [(set (reg:CCC CC_REG)
+		   (compare:CCC (plus:SI (match_operand:SI 1 "register_operand")
+					 (match_operand:SI 2 "arith_operand"))
+			        (match_dup 1)))
+	      (set (match_operand:SI 0 "register_operand")
+		   (plus:SI (match_dup 1) (match_dup 2)))])
+   (set (pc) (if_then_else (ltu (reg:CCC CC_REG) (const_int 0))
+			   (label_ref (match_operand 3))
+			   (pc)))]
+ "")
+
+(define_expand "addvsi4"
+  [(parallel [(set (reg:CCV CC_REG)
+		   (compare:CCV (plus:SI (match_operand:SI 1 "register_operand")
+					 (match_operand:SI 2 "arith_operand"))
+			        (unspec:SI [(match_dup 1) (match_dup 2)]
+					   UNSPEC_ADDV)))
+	      (set (match_operand:SI 0 "register_operand")
+		   (plus:SI (match_dup 1) (match_dup 2)))])
+   (set (pc) (if_then_else (ne (reg:CCV CC_REG) (const_int 0))
+			   (label_ref (match_operand 3))
+			   (pc)))]
+ "")
+
 (define_insn "*cmp_ccnz_plus"
   [(set (reg:CCNZ CC_REG)
 	(compare:CCNZ (plus:SI (match_operand:SI 0 "register_operand" "%r")
@@ -3877,6 +4025,79 @@ (define_insn "*cmp_ccxc_plus_set"
   "addcc\t%1, %2, %0"
   [(set_attr "type" "compare")])
 
+(define_insn "*cmp_ccc_plus_sltu_set"
+  [(set (reg:CCC CC_REG)
+	(compare:CCC (zero_extend:DI
+		       (plus:SI
+			 (plus:SI (match_operand:SI 1 "register_operand" "%r")
+				  (match_operand:SI 2 "arith_operand" "rI"))
+		       (ltu:SI (reg:CCC CC_REG) (const_int 0))))
+		     (plus:DI (plus:DI (zero_extend:DI (match_dup 1))
+				       (zero_extend:DI (match_dup 2)))
+			      (ltu:DI (reg:CCC CC_REG) (const_int 0)))))
+   (set (match_operand:SI 0 "register_operand" "=r")
+	(plus:SI (plus:SI (match_dup 1) (match_dup 2))
+		 (ltu:SI (reg:CCC CC_REG) (const_int 0))))]
+  ""
+  "addxcc\t%1, %2, %0"
+  [(set_attr "type" "compare")])
+
+(define_insn "*cmp_ccv_plus"
+  [(set (reg:CCV CC_REG)
+	(compare:CCV (plus:SI (match_operand:SI 0 "register_operand" "%r")
+			      (match_operand:SI 1 "arith_operand" "rI"))
+		     (unspec:SI [(match_dup 0) (match_dup 1)] UNSPEC_ADDV)))]
+  ""
+  "addcc\t%0, %1, %%g0"
+  [(set_attr "type" "compare")])
+
+(define_insn "*cmp_ccxv_plus"
+  [(set (reg:CCXV CC_REG)
+	(compare:CCXV (plus:DI (match_operand:DI 0 "register_operand" "%r")
+			       (match_operand:DI 1 "arith_operand" "rI"))
+		      (unspec:DI [(match_dup 0) (match_dup 1)] UNSPEC_ADDV)))]
+  "TARGET_ARCH64"
+  "addcc\t%0, %1, %%g0"
+  [(set_attr "type" "compare")])
+
+(define_insn "*cmp_ccv_plus_set"
+  [(set (reg:CCV CC_REG)
+	(compare:CCV (plus:SI (match_operand:SI 1 "register_operand" "%r")
+			      (match_operand:SI 2 "arith_operand" "rI"))
+		     (unspec:SI [(match_dup 1) (match_dup 2)] UNSPEC_ADDV)))
+   (set (match_operand:SI 0 "register_operand" "=r")
+	(plus:SI (match_dup 1) (match_dup 2)))]
+  ""
+  "addcc\t%1, %2, %0"
+  [(set_attr "type" "compare")])
+
+(define_insn "*cmp_ccxv_plus_set"
+  [(set (reg:CCXV CC_REG)
+	(compare:CCXV (plus:DI (match_operand:DI 1 "register_operand" "%r")
+			       (match_operand:DI 2 "arith_operand" "rI"))
+		      (unspec:DI [(match_dup 1) (match_dup 2)] UNSPEC_ADDV)))
+   (set (match_operand:DI 0 "register_operand" "=r")
+	(plus:DI (match_dup 1) (match_dup 2)))]
+  "TARGET_ARCH64"
+  "addcc\t%1, %2, %0"
+  [(set_attr "type" "compare")])
+
+(define_insn "*cmp_ccv_plus_sltu_set"
+  [(set (reg:CCV CC_REG)
+	(compare:CCV (plus:SI (plus:SI (match_operand:SI 1 "register_operand" "%r")
+				       (match_operand:SI 2 "arith_operand" "rI"))
+			      (ltu:SI (reg:CCC CC_REG) (const_int 0)))
+		     (unspec:SI [(plus:SI (match_dup 1) (match_dup 2))
+				 (ltu:SI (reg:CCC CC_REG) (const_int 0))]
+				UNSPEC_ADDV)))
+   (set (match_operand:SI 0 "register_operand" "=r")
+	(plus:SI (plus:SI (match_dup 1) (match_dup 2))
+		 (ltu:SI (reg:CCC CC_REG) (const_int 0))))]
+  ""
+  "addxcc\t%1, %2, %0"
+  [(set_attr "type" "compare")])
+
+
 (define_expand "subdi3"
   [(set (match_operand:DI 0 "register_operand" "")
 	(minus:DI (match_operand:DI 1 "register_operand" "")
@@ -3890,6 +4111,56 @@ (define_expand "subdi3"
     }
 })
 
+(define_expand "usubvdi4"
+  [(parallel [(set (reg:CCX CC_REG)
+		   (compare:CCX (match_operand:DI 1 "register_or_zero_operand")
+				(match_operand:DI 2 "arith_add_operand")))
+	      (set (match_operand:DI 0 "register_operand")
+		   (minus:DI (match_dup 1) (match_dup 2)))])
+   (set (pc) (if_then_else (ltu (reg:CCX CC_REG) (const_int 0))
+			   (label_ref (match_operand 3))
+			   (pc)))]
+ ""
+{
+  if (operands[1] == const0_rtx)
+    {
+      emit_insn (gen_unegvdi3 (operands[0], operands[2], operands[3]));
+      DONE;
+    }
+
+  if (!TARGET_64BIT)
+    {
+      emit_insn (gen_usubvdi4_sp32 (operands[0], operands[1], operands[2]));
+      rtx x = gen_rtx_LTU (VOIDmode, gen_rtx_REG (CCCmode, SPARC_ICC_REG),
+				     const0_rtx);
+      emit_jump_insn (gen_cbranchcc4 (x, XEXP (x, 0), XEXP (x, 1), operands[3]));
+      DONE;
+    }
+})
+
+(define_expand "subvdi4"
+  [(parallel [(set (reg:CCXV CC_REG)
+		   (compare:CCXV (minus:DI (match_operand:DI 1 "register_operand")
+					   (match_operand:DI 2 "arith_add_operand"))
+			         (unspec:DI [(match_dup 1) (match_dup 2)]
+					    UNSPEC_SUBV)))
+	      (set (match_operand:DI 0 "register_operand")
+		   (minus:DI (match_dup 1) (match_dup 2)))])
+   (set (pc) (if_then_else (ne (reg:CCXV CC_REG) (const_int 0))
+			   (label_ref (match_operand 3))
+			   (pc)))]
+ ""
+{
+  if (!TARGET_64BIT)
+    {
+      emit_insn (gen_subvdi4_sp32 (operands[0], operands[1], operands[2]));
+      rtx x = gen_rtx_NE (VOIDmode, gen_rtx_REG (CCVmode, SPARC_ICC_REG),
+				    const0_rtx);
+      emit_jump_insn (gen_cbranchcc4 (x, XEXP (x, 0), XEXP (x, 1), operands[3]));
+      DONE;
+    }
+})
+
 (define_insn_and_split "subdi3_sp32"
   [(set (match_operand:DI 0 "register_operand" "=&r")
 	(minus:DI (match_operand:DI 1 "register_operand" "r")
@@ -3915,6 +4186,80 @@ (define_insn_and_split "subdi3_sp32"
 }
   [(set_attr "length" "2")])
 
+(define_insn_and_split "usubvdi4_sp32"
+  [(set (reg:CCC CC_REG)
+	(compare:CCC (match_operand:DI 1 "register_operand" "r")
+		     (match_operand:DI 2 "arith_double_operand" "rHI")))
+   (set (match_operand:DI 0 "register_operand" "=&r")
+	(minus:DI (match_dup 1) (match_dup 2)))]
+  "!TARGET_ARCH64"
+  "#"
+  "&& reload_completed"
+  [(parallel [(set (reg:CC CC_REG)
+		   (compare:CC (match_dup 4) (match_dup 5)))
+	      (set (match_dup 3)
+		   (minus:SI (match_dup 4) (match_dup 5)))])
+   (parallel [(set (reg:CCC CC_REG)
+		   (compare:CCC (zero_extend:DI
+				  (minus:SI (minus:SI (match_dup 7)
+						      (ltu:SI (reg:CC CC_REG)
+							      (const_int 0)))
+					    (match_dup 8)))
+				(minus:DI
+				  (minus:DI (zero_extend:DI (match_dup 7))
+					    (ltu:DI (reg:CC CC_REG)
+						    (const_int 0)))
+				  (zero_extend:DI (match_dup 8)))))
+	      (set (match_dup 6)
+		   (minus:SI (minus:SI (match_dup 7)
+				       (ltu:SI (reg:CC CC_REG)
+					       (const_int 0)))
+			     (match_dup 8)))])]
+{
+  operands[3] = gen_lowpart (SImode, operands[0]);
+  operands[4] = gen_lowpart (SImode, operands[1]);
+  operands[5] = gen_lowpart (SImode, operands[2]);
+  operands[6] = gen_highpart (SImode, operands[0]);
+  operands[7] = gen_highpart_mode (SImode, DImode, operands[1]);
+  operands[8] = gen_highpart_mode (SImode, DImode, operands[2]);
+}
+  [(set_attr "length" "2")])
+
+(define_insn_and_split "subvdi4_sp32"
+  [(set (reg:CCV CC_REG)
+	(compare:CCV (minus:DI (match_operand:DI 1 "register_operand" "%r")
+			       (match_operand:DI 2 "arith_double_operand" "rHI"))
+		     (unspec:DI [(match_dup 1) (match_dup 2)] UNSPEC_SUBV)))
+   (set (match_operand:DI 0 "register_operand" "=&r")
+	(minus:DI (match_dup 1) (match_dup 2)))]
+  "!TARGET_ARCH64"
+  "#"
+  "&& reload_completed"
+  [(parallel [(set (reg:CC CC_REG)
+		   (compare:CC (match_dup 4) (match_dup 5)))
+	      (set (match_dup 3)
+		   (minus:SI (match_dup 4) (match_dup 5)))])
+   (parallel [(set (reg:CCV CC_REG)
+		   (compare:CCV (minus:SI (minus:SI (match_dup 7) (match_dup 8))
+					  (ltu:SI (reg:CC CC_REG)
+						  (const_int 0)))
+				(unspec:SI [(minus:SI (match_dup 7) (match_dup 8))
+					    (ltu:SI (reg:CC CC_REG)
+						    (const_int 0))]
+					   UNSPEC_SUBV)))
+	      (set (match_dup 6)
+		   (minus:SI (minus:SI (match_dup 7) (match_dup 8))
+			     (ltu:SI (reg:CC CC_REG) (const_int 0))))])]
+{
+  operands[3] = gen_lowpart (SImode, operands[0]);
+  operands[4] = gen_lowpart (SImode, operands[1]);
+  operands[5] = gen_lowpart (SImode, operands[2]);
+  operands[6] = gen_highpart (SImode, operands[0]);
+  operands[7] = gen_highpart_mode (SImode, DImode, operands[1]);
+  operands[8] = gen_highpart_mode (SImode, DImode, operands[2]);
+}
+  [(set_attr "length" "2")])
+
 (define_insn_and_split "*subx_extend_sp32"
   [(set (match_operand:DI 0 "register_operand" "=r")
 	(zero_extend:DI (minus:SI (minus:SI
@@ -3971,6 +4316,37 @@ (define_insn "subsi3"
   [(set_attr "type" "*,*")
    (set_attr "fptype" "*,*")])
 
+(define_expand "usubvsi4"
+  [(parallel [(set (reg:CC CC_REG)
+		   (compare:CC (match_operand:SI 1 "register_or_zero_operand")
+			       (match_operand:SI 2 "arith_operand")))
+	      (set (match_operand:SI 0 "register_operand")
+		   (minus:SI (match_dup 1) (match_dup 2)))])
+   (set (pc) (if_then_else (ltu (reg:CC CC_REG) (const_int 0))
+			   (label_ref (match_operand 3))
+			   (pc)))]
+ ""
+{
+  if (operands[1] == const0_rtx)
+    {
+      emit_insn (gen_unegvsi3 (operands[0], operands[2], operands[3]));
+      DONE;
+    }
+})
+
+(define_expand "subvsi4"
+  [(parallel [(set (reg:CCV CC_REG)
+		   (compare:CCV (minus:SI (match_operand:SI 1 "register_operand")
+					  (match_operand:SI 2 "arith_operand"))
+			        (unspec:SI [(match_dup 1) (match_dup 2)]
+					   UNSPEC_SUBV)))
+	      (set (match_operand:SI 0 "register_operand")
+		   (minus:SI (match_dup 1) (match_dup 2)))])
+   (set (pc) (if_then_else (ne (reg:CCV CC_REG) (const_int 0))
+			   (label_ref (match_operand 3))
+			   (pc)))]
+ "")
+
 (define_insn "*cmp_ccnz_minus"
   [(set (reg:CCNZ CC_REG)
 	(compare:CCNZ (minus:SI (match_operand:SI 0 "register_or_zero_operand" "rJ")
@@ -4031,6 +4407,82 @@ (define_insn "*cmpdi_set"
   "subcc\t%r1, %2, %0"
   [(set_attr "type" "compare")])
 
+(define_insn "*cmp_ccc_minus_sltu_set"
+  [(set (reg:CCC CC_REG)
+	(compare:CCC (zero_extend:DI
+		       (minus:SI
+			 (minus:SI
+			   (match_operand:SI 1 "register_or_zero_operand" "rJ")
+			   (ltu:SI (reg:CC CC_REG) (const_int 0)))
+			 (match_operand:SI 2 "arith_operand" "rI")))
+		     (minus:DI
+		       (minus:DI
+			 (zero_extend:DI (match_dup 1))
+			 (ltu:DI (reg:CC CC_REG) (const_int 0)))
+		       (zero_extend:DI (match_dup 2)))))
+   (set (match_operand:SI 0 "register_operand" "=r")
+	(minus:SI (minus:SI (match_dup 1)
+			    (ltu:SI (reg:CC CC_REG) (const_int 0)))
+		  (match_dup 2)))]
+  ""
+  "subxcc\t%r1, %2, %0"
+  [(set_attr "type" "compare")])
+
+(define_insn "*cmp_ccv_minus"
+  [(set (reg:CCV CC_REG)
+	(compare:CCV (minus:SI (match_operand:SI 0 "register_or_zero_operand" "rJ")
+			       (match_operand:SI 1 "arith_operand" "rI"))
+		     (unspec:SI [(match_dup 0) (match_dup 1)] UNSPEC_SUBV)))]
+  ""
+  "subcc\t%r0, %1, %%g0"
+  [(set_attr "type" "compare")])
+
+(define_insn "*cmp_ccxv_minus"
+  [(set (reg:CCXV CC_REG)
+	(compare:CCXV (minus:DI (match_operand:DI 0 "register_or_zero_operand" "rJ")
+			        (match_operand:DI 1 "arith_operand" "rI"))
+		      (unspec:DI [(match_dup 0) (match_dup 1)] UNSPEC_SUBV)))]
+  "TARGET_ARCH64"
+  "subcc\t%r0, %1, %%g0"
+  [(set_attr "type" "compare")])
+
+(define_insn "*cmp_ccv_minus_set"
+  [(set (reg:CCV CC_REG)
+	(compare:CCV (minus:SI (match_operand:SI 1 "register_or_zero_operand" "rJ")
+			       (match_operand:SI 2 "arith_operand" "rI"))
+		     (unspec:SI [(match_dup 1) (match_dup 2)] UNSPEC_SUBV)))
+   (set (match_operand:SI 0 "register_operand" "=r")
+	(minus:SI (match_dup 1) (match_dup 2)))]
+  ""
+  "subcc\t%r1, %2, %0"
+  [(set_attr "type" "compare")])
+
+(define_insn "*cmp_ccxv_minus_set"
+  [(set (reg:CCXV CC_REG)
+	(compare:CCXV (minus:DI (match_operand:DI 1 "register_or_zero_operand" "rJ")
+			        (match_operand:DI 2 "arith_operand" "rI"))
+		      (unspec:DI [(match_dup 1) (match_dup 2)] UNSPEC_SUBV)))
+   (set (match_operand:DI 0 "register_operand" "=r")
+	(minus:DI (match_dup 1) (match_dup 2)))]
+  "TARGET_ARCH64"
+  "subcc\t%r1, %2, %0"
+  [(set_attr "type" "compare")])
+
+(define_insn "*cmp_ccv_minus_sltu_set"
+  [(set (reg:CCV CC_REG)
+	(compare:CCV (minus:SI (minus:SI (match_operand:SI 1 "register_or_zero_operand" "rJ")
+					 (match_operand:SI 2 "arith_operand" "rI"))
+			       (ltu:SI (reg:CC CC_REG) (const_int 0)))
+		     (unspec:SI [(minus:SI (match_dup 1) (match_dup 2))
+				 (ltu:SI (reg:CC CC_REG) (const_int 0))]
+				UNSPEC_SUBV)))
+   (set (match_operand:SI 0 "register_operand" "=r")
+	(minus:SI (minus:SI (match_dup 1) (match_dup 2))
+		  (ltu:SI (reg:CC CC_REG) (const_int 0))))]
+  ""
+  "subxcc\t%1, %2, %0"
+  [(set_attr "type" "compare")])
+
 
 ;; Integer multiply/divide instructions.
 
@@ -5127,6 +5579,50 @@ (define_expand "negdi2"
     }
 })
 
+(define_expand "unegvdi3"
+  [(parallel [(set (reg:CCXC CC_REG)
+		   (compare:CCXC (not:DI (match_operand:DI 1 "register_operand" ""))
+				 (const_int -1)))
+	      (set (match_operand:DI 0 "register_operand" "")
+		   (neg:DI (match_dup 1)))])
+   (set (pc)
+        (if_then_else (ltu (reg:CCXC CC_REG) (const_int 0))
+		      (label_ref (match_operand 2 ""))
+		      (pc)))]
+  ""
+{
+  if (!TARGET_64BIT)
+    {
+      emit_insn (gen_unegvdi3_sp32 (operands[0], operands[1]));
+      rtx x = gen_rtx_LTU (VOIDmode, gen_rtx_REG (CCCmode, SPARC_ICC_REG),
+				     const0_rtx);
+      emit_jump_insn (gen_cbranchcc4 (x, XEXP (x, 0), XEXP (x, 1), operands[2]));
+      DONE;
+    }
+})
+
+(define_expand "negvdi3"
+  [(parallel [(set (reg:CCXV CC_REG)
+		   (compare:CCXV (neg:DI (match_operand:DI 1 "register_operand" ""))
+				 (unspec:DI [(match_dup 1)] UNSPEC_NEGV)))
+	      (set (match_operand:DI 0 "register_operand" "")
+		   (neg:DI (match_dup 1)))])
+   (set (pc)
+        (if_then_else (ne (reg:CCXV CC_REG) (const_int 0))
+		      (label_ref (match_operand 2 ""))
+		      (pc)))]
+  ""
+{
+  if (!TARGET_64BIT)
+    {
+      emit_insn (gen_negvdi3_sp32 (operands[0], operands[1]));
+      rtx x = gen_rtx_NE (VOIDmode, gen_rtx_REG (CCVmode, SPARC_ICC_REG),
+				    const0_rtx);
+      emit_jump_insn (gen_cbranchcc4 (x, XEXP (x, 0), XEXP (x, 1), operands[2]));
+      DONE;
+    }
+})
+
 (define_insn_and_split "negdi2_sp32"
   [(set (match_operand:DI 0 "register_operand" "=&r")
 	(neg:DI (match_operand:DI 1 "register_operand" "r")))
@@ -5145,6 +5641,64 @@ (define_insn_and_split "negdi2_sp32"
    operands[5] = gen_lowpart (SImode, operands[1]);"
   [(set_attr "length" "2")])
 
+(define_insn_and_split "unegvdi3_sp32"
+  [(set (reg:CCC CC_REG)
+	(compare:CCC (not:DI (match_operand:DI 1 "register_operand" "r"))
+		     (const_int -1)))
+   (set (match_operand:DI 0 "register_operand" "=&r")
+	(neg:DI (match_dup 1)))]
+  "!TARGET_ARCH64"
+  "#"
+  "&& reload_completed"
+  [(parallel [(set (reg:CCC CC_REG)
+                   (compare:CCC (not:SI (match_dup 5)) (const_int -1)))
+              (set (match_dup 4) (neg:SI (match_dup 5)))])
+   (parallel [(set (reg:CCC CC_REG)
+		   (compare:CCC (zero_extend:DI
+				  (neg:SI (plus:SI (match_dup 3)
+						   (ltu:SI (reg:CCC CC_REG)
+							   (const_int 0)))))
+				(neg:DI (plus:DI (zero_extend:DI (match_dup 3))
+						 (ltu:DI (reg:CCC CC_REG)
+							 (const_int 0))))))
+	      (set (match_dup 2) (neg:SI (plus:SI (match_dup 3)
+						  (ltu:SI (reg:CCC CC_REG)
+							  (const_int 0)))))])]
+  "operands[2] = gen_highpart (SImode, operands[0]);
+   operands[3] = gen_highpart (SImode, operands[1]);
+   operands[4] = gen_lowpart (SImode, operands[0]);
+   operands[5] = gen_lowpart (SImode, operands[1]);"
+  [(set_attr "length" "2")])
+
+(define_insn_and_split "negvdi3_sp32"
+  [(set (reg:CCV CC_REG)
+	(compare:CCV (neg:DI (match_operand:DI 1 "register_operand" "r"))
+		     (unspec:DI [(match_dup 1)] UNSPEC_NEGV)))
+   (set (match_operand:DI 0 "register_operand" "=&r")
+	(neg:DI (match_dup 1)))]
+  "!TARGET_ARCH64"
+  "#"
+  "&& reload_completed"
+  [(parallel [(set (reg:CCC CC_REG)
+                   (compare:CCC (not:SI (match_dup 5)) (const_int -1)))
+              (set (match_dup 4) (neg:SI (match_dup 5)))])
+   (parallel [(set (reg:CCV CC_REG)
+		   (compare:CCV (neg:SI (plus:SI (match_dup 3)
+						 (ltu:SI (reg:CCC CC_REG)
+							 (const_int 0))))
+				(unspec:SI [(plus:SI (match_dup 3)
+						     (ltu:SI (reg:CCC CC_REG)
+							     (const_int 0)))]
+					   UNSPEC_NEGV)))
+	      (set (match_dup 2) (neg:SI (plus:SI (match_dup 3)
+						  (ltu:SI (reg:CCC CC_REG)
+							  (const_int 0)))))])]
+  "operands[2] = gen_highpart (SImode, operands[0]);
+   operands[3] = gen_highpart (SImode, operands[1]);
+   operands[4] = gen_lowpart (SImode, operands[0]);
+   operands[5] = gen_lowpart (SImode, operands[1]);"
+  [(set_attr "length" "2")])
+
 (define_insn "*negdi2_sp64"
   [(set (match_operand:DI 0 "register_operand" "=r")
 	(neg:DI (match_operand:DI 1 "register_operand" "r")))]
@@ -5157,6 +5711,30 @@ (define_insn "negsi2"
   ""
   "sub\t%%g0, %1, %0")
 
+(define_expand "unegvsi3"
+  [(parallel [(set (reg:CCC CC_REG)
+		   (compare:CCC (not:SI (match_operand:SI 1 "arith_operand" ""))
+				(const_int -1)))
+	      (set (match_operand:SI 0 "register_operand" "")
+		   (neg:SI (match_dup 1)))])
+   (set (pc)
+        (if_then_else (ltu (reg:CCC CC_REG) (const_int 0))
+		      (label_ref (match_operand 2 ""))
+		      (pc)))]
+  "")
+
+(define_expand "negvsi3"
+  [(parallel [(set (reg:CCV CC_REG)
+		   (compare:CCV (neg:SI (match_operand:SI 1 "arith_operand" ""))
+				(unspec:SI [(match_dup 1)] UNSPEC_NEGV)))
+	      (set (match_operand:SI 0 "register_operand" "")
+		   (neg:SI (match_dup 1)))])
+   (set (pc)
+        (if_then_else (ne (reg:CCV CC_REG) (const_int 0))
+		      (label_ref (match_operand 2 ""))
+		      (pc)))]
+"")
+
 (define_insn "*cmp_ccnz_neg"
   [(set (reg:CCNZ CC_REG)
 	(compare:CCNZ (neg:SI (match_operand:SI 0 "arith_operand" "rI"))
@@ -5213,6 +5791,73 @@ (define_insn "*cmp_ccxc_neg_set"
   "subcc\t%%g0, %1, %0"
   [(set_attr "type" "compare")])
 
+(define_insn "*cmp_ccc_neg_sltu_set"
+  [(set (reg:CCC CC_REG)
+	(compare:CCC (zero_extend:DI
+		       (neg:SI (plus:SI (match_operand:SI 1 "arith_operand" "rI")
+				        (ltu:SI (reg:CCC CC_REG)
+						(const_int 0)))))
+		     (neg:DI (plus:DI (zero_extend:DI (match_dup 1))
+				      (ltu:DI (reg:CCC CC_REG)
+					      (const_int 0))))))
+   (set (match_operand:SI 0 "register_operand" "=r")
+	(neg:SI (plus:SI (match_dup 1)
+			 (ltu:SI (reg:CCC CC_REG) (const_int 0)))))]
+  ""
+  "subxcc\t%%g0, %1, %0"
+  [(set_attr "type" "compare")])
+
+(define_insn "*cmp_ccv_neg"
+  [(set (reg:CCV CC_REG)
+	(compare:CCV (neg:SI (match_operand:SI 0 "arith_operand" "rI"))
+		     (unspec:SI [(match_dup 0)] UNSPEC_NEGV)))]
+  ""
+  "subcc\t%%g0, %0, %%g0"
+  [(set_attr "type" "compare")])
+
+(define_insn "*cmp_ccxv_neg"
+  [(set (reg:CCXV CC_REG)
+	(compare:CCXV (neg:DI (match_operand:DI 0 "arith_operand" "rI"))
+		      (unspec:DI [(match_dup 0)] UNSPEC_NEGV)))]
+  "TARGET_ARCH64"
+  "subcc\t%%g0, %0, %%g0"
+  [(set_attr "type" "compare")])
+
+(define_insn "*cmp_ccv_neg_set"
+  [(set (reg:CCV CC_REG)
+	(compare:CCV (neg:SI (match_operand:SI 1 "arith_operand" "rI"))
+		     (unspec:SI [(match_dup 1)] UNSPEC_NEGV)))
+   (set (match_operand:SI 0 "register_operand" "=r")
+	(neg:SI (match_dup 1)))]
+  ""
+  "subcc\t%%g0, %1, %0"
+  [(set_attr "type" "compare")])
+
+(define_insn "*cmp_ccxv_neg_set"
+  [(set (reg:CCXV CC_REG)
+	(compare:CCXV (neg:DI (match_operand:DI 1 "arith_operand" "rI"))
+		      (unspec:DI [(match_dup 1)] UNSPEC_NEGV)))
+   (set (match_operand:DI 0 "register_operand" "=r")
+	(neg:DI (match_dup 1)))]
+  "TARGET_ARCH64"
+  "subcc\t%%g0, %1, %0"
+  [(set_attr "type" "compare")])
+
+(define_insn "*cmp_ccv_neg_sltu_set"
+  [(set (reg:CCV CC_REG)
+	(compare:CCV (neg:SI (plus:SI (match_operand:SI 1 "arith_operand" "rI")
+				      (ltu:SI (reg:CCC CC_REG) (const_int 0))))
+		     (unspec:SI [(plus:SI (match_dup 1)
+				          (ltu:SI (reg:CCC CC_REG)
+						  (const_int 0)))]
+				UNSPEC_NEGV)))
+   (set (match_operand:SI 0 "register_operand" "=r")
+	(neg:SI (plus:SI (match_dup 1)
+			 (ltu:SI (reg:CCC CC_REG) (const_int 0)))))]
+  ""
+  "subxcc\t%%g0, %1, %0"
+  [(set_attr "type" "compare")])
+
 
 (define_insn "one_cmpldi2"
   [(set (match_operand:DI 0 "register_operand" "=r")
Index: testsuite/gcc.target/sparc/overflow-1.c
===================================================================
--- testsuite/gcc.target/sparc/overflow-1.c	(revision 0)
+++ testsuite/gcc.target/sparc/overflow-1.c	(working copy)
@@ -0,0 +1,43 @@
+/* { dg-do compile } */
+/* { dg-options "-O -mcpu=v8" } */
+/* { dg-require-effective-target ilp32 } */
+
+#include <stdbool.h>
+#include <stdint.h>
+
+bool my_uadd_overflow (uint32_t a, uint32_t b, uint32_t *res)
+{
+  return __builtin_add_overflow (a, b, res);
+}
+
+bool my_usub_overflow (uint32_t a, uint32_t b, uint32_t *res)
+{
+  return __builtin_sub_overflow (a, b, res);
+}
+
+bool my_uneg_overflow (uint32_t a, uint32_t *res)
+{
+  return __builtin_sub_overflow (0, a, res);
+}
+
+bool my_add_overflow (int32_t a, int32_t b, int32_t *res)
+{
+  return __builtin_add_overflow (a, b, res);
+}
+
+bool my_sub_overflow (int32_t a, int32_t b, int32_t *res)
+{
+  return __builtin_sub_overflow (a, b, res);
+}
+
+bool my_neg_overflow (int32_t a, int32_t *res)
+{
+  return __builtin_sub_overflow (0, a, res);
+}
+
+/* { dg-final { scan-assembler-times "addcc\t%" 2 } } */
+/* { dg-final { scan-assembler-times "subcc\t%" 4 } } */
+/* { dg-final { scan-assembler-times "addx\t%" 3 } } */
+/* { dg-final { scan-assembler-times "bvs" 3 } } */
+/* { dg-final { scan-assembler-not "cmp\t%" } } */
+/* { dg-final { scan-assembler-not "save\t%" } } */
Index: testsuite/gcc.target/sparc/overflow-2.c
===================================================================
--- testsuite/gcc.target/sparc/overflow-2.c	(revision 0)
+++ testsuite/gcc.target/sparc/overflow-2.c	(working copy)
@@ -0,0 +1,46 @@
+/* { dg-do compile } */
+/* { dg-options "-O -mcpu=v8" } */
+/* { dg-require-effective-target ilp32 } */
+
+#include <stdbool.h>
+#include <stdint.h>
+
+bool my_uadd_overflow (uint64_t a, uint64_t b, uint64_t *res)
+{
+  return __builtin_add_overflow (a, b, res);
+}
+
+bool my_usub_overflow (uint64_t a, uint64_t b, uint64_t *res)
+{
+  return __builtin_sub_overflow (a, b, res);
+}
+
+bool my_uneg_overflow (uint64_t a, uint64_t *res)
+{
+  return __builtin_sub_overflow (0, a, res);
+}
+
+bool my_add_overflow (int64_t a, int64_t b, int64_t *res)
+{
+  return __builtin_add_overflow (a, b, res);
+}
+
+bool my_sub_overflow (int64_t a, int64_t b, int64_t *res)
+{
+  return __builtin_sub_overflow (a, b, res);
+}
+
+bool my_neg_overflow (int64_t a, int64_t *res)
+{
+  return __builtin_sub_overflow (0, a, res);
+}
+
+/* { dg-final { scan-assembler-times "addcc\t%" 2 } } */
+/* { dg-final { scan-assembler-times "addxcc\t%" 2 } } */
+/* { dg-final { scan-assembler-times "subcc\t%" 4 } } */
+/* { dg-final { scan-assembler-times "subxcc\t%" 4 } } */
+/* { dg-final { scan-assembler-times "addx\t%" 2 } } */
+/* { dg-final { scan-assembler-times "blu" 1 } } */
+/* { dg-final { scan-assembler-times "bvs" 3 } } */
+/* { dg-final { scan-assembler-not "cmp\t%" } } */
+/* { dg-final { scan-assembler-not "save\t%" } } */
Index: testsuite/gcc.target/sparc/overflow-3.c
===================================================================
--- testsuite/gcc.target/sparc/overflow-3.c	(revision 0)
+++ testsuite/gcc.target/sparc/overflow-3.c	(working copy)
@@ -0,0 +1,44 @@
+/* { dg-do compile } */
+/* { dg-options "-O" } */
+/* { dg-require-effective-target lp64 } */
+
+#include <stdbool.h>
+#include <stdint.h>
+
+bool my_uadd_overflow (uint64_t a, uint64_t b, uint64_t *res)
+{
+  return __builtin_add_overflow (a, b, res);
+}
+
+bool my_usub_overflow (uint64_t a, uint64_t b, uint64_t *res)
+{
+  return __builtin_sub_overflow (a, b, res);
+}
+
+bool my_uneg_overflow (uint64_t a, uint64_t *res)
+{
+  return __builtin_sub_overflow (0, a, res);
+}
+
+bool my_add_overflow (int64_t a, int64_t b, int64_t *res)
+{
+  return __builtin_add_overflow (a, b, res);
+}
+
+bool my_sub_overflow (int64_t a, int64_t b, int64_t *res)
+{
+  return __builtin_sub_overflow (a, b, res);
+}
+
+bool my_neg_overflow (int64_t a, int64_t *res)
+{
+  return __builtin_sub_overflow (0, a, res);
+}
+
+/* { dg-final { scan-assembler-times "addcc\t%" 2 } } */
+/* { dg-final { scan-assembler-times "subcc\t%" 4 } } */
+/* { dg-final { scan-assembler-times "movlu\t%" 1 } } */
+/* { dg-final { scan-assembler-times "blu" 2 } } */
+/* { dg-final { scan-assembler-times "bvs" 3 } } */
+/* { dg-final { scan-assembler-not "cmp\t%" } } */
+/* { dg-final { scan-assembler-not "save\t%" } } */
