arm.md (negdi_extendsidi): New pattern.

2013-04-05  Greta Yorsh  <Greta.Yorsh@arm.com>

gcc/
	* config/arm/arm.md (negdi_extendsidi): New pattern.
	(negdi_zero_extendsidi): Likewise.

gcc/testsuite

	* gcc.target/arm/negdi-1.c: New test.
	* gcc.target/arm/negdi-2.c: Likewise.
	* gcc.target/arm/negdi-3.c: Likewise.
	* gcc.target/arm/negdi-4.c: Likewise.

From-SVN: r197526

gcc/ChangeLog

 2013-04-05  Greta Yorsh  <Greta.Yorsh@arm.com>
 
+	* config/arm/arm.md (negdi_extendsidi): New pattern.
+	(negdi_zero_extendsidi): Likewise.
+
+2013-04-05  Greta Yorsh  <Greta.Yorsh@arm.com>
+
 	* config/arm/arm.md (andsi_iorsi3_notsi): Convert define_insn into
 	define_insn_and_split.
 	(arm_negdi2,arm_abssi2,arm_neg_abssi2): Likewise.

gcc/config/arm/arm.md

@@ -4344,6 +4344,73 @@
   "TARGET_32BIT && TARGET_HARD_FLOAT && TARGET_VFP_DOUBLE"
   "")
 
+;; Negate an extended 32-bit value.
+(define_insn_and_split "*negdi_extendsidi"
+  [(set (match_operand:DI 0 "s_register_operand" "=r,&r,l,&l")
+	(neg:DI (sign_extend:DI (match_operand:SI 1 "s_register_operand" "0,r,0,l"))))
+   (clobber (reg:CC CC_REGNUM))]
+  "TARGET_32BIT"
+  "#" ; rsb\\t%Q0, %1, #0\;asr\\t%R0, %Q0, #31
+  "&& reload_completed"
+  [(const_int 0)]
+  {
+     operands[2] = gen_highpart (SImode, operands[0]);
+     operands[0] = gen_lowpart (SImode, operands[0]);
+     rtx tmp = gen_rtx_SET (VOIDmode,
+                            operands[0],
+                            gen_rtx_MINUS (SImode,
+                                           const0_rtx,
+                                           operands[1]));
+     if (TARGET_ARM)
+       {
+         emit_insn (tmp);
+       }
+     else
+       {
+         /* Set the flags, to emit the short encoding in Thumb2.  */
+         rtx flags = gen_rtx_SET (VOIDmode,
+                                  gen_rtx_REG (CCmode, CC_REGNUM),
+                                  gen_rtx_COMPARE (CCmode,
+                                                   const0_rtx,
+                                                   operands[1]));
+         emit_insn (gen_rtx_PARALLEL (VOIDmode,
+                                      gen_rtvec (2,
+                                                 flags,
+                                                 tmp)));
+       }
+       emit_insn (gen_rtx_SET (VOIDmode,
+                              operands[2],
+                              gen_rtx_ASHIFTRT (SImode,
+                                                operands[0],
+                                                GEN_INT (31))));
+     DONE;
+  }
+  [(set_attr "length" "8,8,4,4")
+   (set_attr "arch" "a,a,t2,t2")]
+)
+
+(define_insn_and_split "*negdi_zero_extendsidi"
+  [(set (match_operand:DI 0 "s_register_operand" "=r,&r")
+	(neg:DI (zero_extend:DI (match_operand:SI 1 "s_register_operand" "0,r"))))
+   (clobber (reg:CC CC_REGNUM))]
+  "TARGET_32BIT"
+  "#" ; "rsbs\\t%Q0, %1, #0\;sbc\\t%R0,%R0,%R0"
+      ;; Don't care what register is input to sbc,
+      ;; since we just just need to propagate the carry.
+  "&& reload_completed"
+  [(parallel [(set (reg:CC CC_REGNUM)
+                   (compare:CC (const_int 0) (match_dup 1)))
+              (set (match_dup 0) (minus:SI (const_int 0) (match_dup 1)))])
+   (set (match_dup 2) (minus:SI (minus:SI (match_dup 2) (match_dup 2))
+                                (ltu:SI (reg:CC_C CC_REGNUM) (const_int 0))))]
+  {
+    operands[2] = gen_highpart (SImode, operands[0]);
+    operands[0] = gen_lowpart (SImode, operands[0]);
+  }
+  [(set_attr "conds" "clob")
+   (set_attr "length" "8")]   ;; length in thumb is 4
+)
+
 ;; abssi2 doesn't really clobber the condition codes if a different register
 ;; is being set.  To keep things simple, assume during rtl manipulations that
 ;; it does, but tell the final scan operator the truth.  Similarly for

gcc/testsuite/ChangeLog

+2013-04-05  Greta Yorsh  <Greta.Yorsh@arm.com>
+
+	* gcc.target/arm/negdi-1.c: New test.
+	* gcc.target/arm/negdi-2.c: Likewise.
+	* gcc.target/arm/negdi-3.c: Likewise.
+	* gcc.target/arm/negdi-4.c: Likewise.
+
 2013-04-05  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>
 
 	* lib/target-supports.exp (add_options_for_arm_v8_neon):

gcc/testsuite/gcc.target/arm/negdi-1.c

+/* { dg-do compile } */
+/* { dg-require-effective-target arm32 } */
+/* { dg-options "-O2" } */
+
+signed long long extendsidi_negsi (signed int x)
+{
+  return -x;
+}
+
+/*
+Expected output:
+	rsb	r0, r0, #0
+	mov	r1, r0, asr #31
+*/
+/* { dg-final { scan-assembler-times "rsb" 1 { target { arm_nothumb } } } } */
+/* { dg-final { scan-assembler-times "negs\\t" 1 { target { ! { arm_nothumb } } } } } */
+/* { dg-final { scan-assembler-times "asr" 1 } } */

gcc/testsuite/gcc.target/arm/negdi-2.c

+/* { dg-do compile } */
+/* { dg-require-effective-target arm32 } */
+/* { dg-options "-O2" } */
+
+signed long long zero_extendsidi_negsi (unsigned int x)
+{
+  return -x;
+}
+/*
+Expected output:
+	rsb	r0, r0, #0
+	mov	r1, #0
+*/
+/* { dg-final { scan-assembler-times "rsb\\tr0, r0, #0" 1 { target { arm_nothumb } } } } */
+/* { dg-final { scan-assembler-times "negs\\tr0, r0" 1 { target { ! arm_nothumb } } } } */
+/* { dg-final { scan-assembler-times "mov" 1 } } */

gcc/testsuite/gcc.target/arm/negdi-3.c

+/* { dg-do compile } */
+/* { dg-require-effective-target arm32 } */
+/* { dg-options "-O2" } */
+
+signed long long negdi_zero_extendsidi (unsigned int x)
+{
+  return -((signed long long) x);
+}
+/*
+Expected output:
+        rsbs    r0, r0, #0
+        sbc     r1, r1, r1
+*/
+/* { dg-final { scan-assembler-times "rsb" 1 } } */
+/* { dg-final { scan-assembler-times "sbc" 1 } } */
+/* { dg-final { scan-assembler-times "mov" 0 } } */
+/* { dg-final { scan-assembler-times "rsc" 0 } } */

gcc/testsuite/gcc.target/arm/negdi-4.c

+/* { dg-do compile } */
+/* { dg-require-effective-target arm32 } */
+/* { dg-options "-O2" } */
+
+signed long long negdi_extendsidi (signed int x)
+{
+  return -((signed long long) x);
+}
+/*
+Expected output:
+        rsbs    r0, r0, #0
+        mov     r1, r0, asr #31
+*/
+/* { dg-final { scan-assembler-times "rsb" 1 } } */
+/* { dg-final { scan-assembler-times "asr" 1 } } */
+/* { dg-final { scan-assembler-times "rsc" 0 } } */