@@ -3087,7 +3087,8 @@ aarch64_select_cc_mode (RTX_CODE code, r
if ((GET_MODE (x) == SImode || GET_MODE (x) == DImode)
&& y == const0_rtx
&& (code == EQ || code == NE || code == LT || code == GE)
- && (GET_CODE (x) == PLUS || GET_CODE (x) == MINUS || GET_CODE (x) == AND))
+ && (GET_CODE (x) == PLUS || GET_CODE (x) == MINUS || GET_CODE (x) == AND
+ || GET_CODE (x) == NEG))
return CC_NZmode;
/* A compare with a shifted operand. Because of canonicalization,
@@ -1901,6 +1901,21 @@
(set_attr "mode" "SI")]
)
+(define_insn "*neg_<shift><mode>3_compare0"
+ [(set (reg:CC_NZ CC_REGNUM)
+ (compare:CC_NZ
+ (neg:GPI (ASHIFT:GPI
+ (match_operand:GPI 1 "register_operand" "r")
+ (match_operand:QI 2 "aarch64_shift_imm_<mode>" "n")))
+ (const_int 0)))
+ (set (match_operand:GPI 0 "register_operand" "=r")
+ (neg:GPI (ASHIFT:GPI (match_dup 1) (match_dup 2))))]
+ ""
+ "negs\\t%<w>0, %<w>1, <shift> %2"
+ [(set_attr "v8type" "alus_shift")
+ (set_attr "mode" "<MODE>")]
+)
+
(define_insn "*neg_<shift>_<mode>2"
[(set (match_operand:GPI 0 "register_operand" "=r")
(neg:GPI (ASHIFT:GPI
@@ -0,0 +1,108 @@
+/* { dg-do run } */
+/* { dg-options "-O2 --save-temps" } */
+
+extern void abort (void);
+int z;
+
+int
+negs_si_test1 (int a, int b, int c)
+{
+ int d = -b;
+
+ /* { dg-final { scan-assembler "negs\tw\[0-9\]+, w\[0-9\]+" } } */
+ if (d < 0)
+ return a + c;
+
+ z = d;
+ return b + c + d;
+}
+
+int
+negs_si_test3 (int a, int b, int c)
+{
+ int d = -(b) << 3;
+
+ /* { dg-final { scan-assembler "negs\tw\[0-9\]+, w\[0-9\]+, lsl 3" } } */
+ if (d == 0)
+ return a + c;
+
+ z = d;
+ return b + c + d;
+}
+
+typedef long long s64;
+s64 zz;
+
+s64
+negs_di_test1 (s64 a, s64 b, s64 c)
+{
+ s64 d = -b;
+
+ /* { dg-final { scan-assembler "negs\tx\[0-9\]+, x\[0-9\]+" } } */
+ if (d < 0)
+ return a + c;
+
+ zz = d;
+ return b + c + d;
+}
+
+s64
+negs_di_test3 (s64 a, s64 b, s64 c)
+{
+ s64 d = -(b) << 3;
+
+ /* { dg-final { scan-assembler "negs\tx\[0-9\]+, x\[0-9\]+, lsl 3" } } */
+ if (d == 0)
+ return a + c;
+
+ zz = d;
+ return b + c + d;
+}
+
+int main ()
+{
+ int x;
+ s64 y;
+
+ x = negs_si_test1 (2, 12, 5);
+ if (x != 7)
+ abort ();
+
+ x = negs_si_test1 (1, 2, 32);
+ if (x != 33)
+ abort ();
+
+ x = negs_si_test3 (13, 14, 5);
+ if (x != -93)
+ abort ();
+
+ x = negs_si_test3 (15, 21, 2);
+ if (x != -145)
+ abort ();
+
+ y = negs_di_test1 (0x20202020ll,
+ 0x65161611ll,
+ 0x42434243ll);
+ if (y != 0x62636263ll)
+ abort ();
+
+ y = negs_di_test1 (0x1010101010101ll,
+ 0x123456789abcdll,
+ 0x5555555555555ll);
+ if (y != 0x6565656565656ll)
+ abort ();
+
+ y = negs_di_test3 (0x62523781ll,
+ 0x64234978ll,
+ 0x12345123ll);
+ if (y != 0xfffffffd553d4edbll)
+ abort ();
+
+ y = negs_di_test3 (0x763526268ll,
+ 0x101010101ll,
+ 0x222222222ll);
+ if (y != 0xfffffffb1b1b1b1bll)
+ abort ();
+
+ return 0;
+}