Hi Richard,
New patch adds a new IFN_SIGNBIT internal function that maps
to signbit_optab.
gcc/ChangeLog:
2019-05-05 Przemyslaw Wirkus <przemyslaw.wir...@arm.com>
* gcc/internal-fn.def (SIGNBIT): New.
* gcc/config/aarch64/aarch64-simd.md (signbitv4sf2): New expand
defined.
gcc/testsuite/ChangeLog:
2019-05-05 Przemyslaw Wirkus <przemyslaw.wir...@arm.com>
* gcc/testsuite/gcc.target/aarch64/signbitv4sf.c: New test.diff --git a/gcc/config/aarch64/aarch64-simd.md
b/gcc/config/aarch64/aarch64-simd.md
index
e3852c5d182b70978d7603225fce55c0b8ee2894..3374ce95b912cceaca49660df0579467f758974d
100644
--- a/gcc/config/aarch64/aarch64-simd.md
+++ b/gcc/config/aarch64/aarch64-simd.md
@@ -935,6 +935,21 @@
[(set_attr "type" "neon_ins<q>")]
)
+(define_expand "signbitv4sf2"
+ [(use (match_operand:V4SI 0 "register_operand"))
+ (use (match_operand:V4SF 1 "register_operand"))]
+ "TARGET_SIMD"
+{
+ int shift_amount = GET_MODE_UNIT_BITSIZE (V4SImode) - 1;
+ rtx shift_vector = aarch64_simd_gen_const_vector_dup (V4SImode,
+ shift_amount);
+ operands[1] = lowpart_subreg (V4SImode, operands[1], V4SFmode);
+
+ emit_insn (gen_aarch64_simd_lshrv4si (operands[0], operands[1],
+ shift_vector));
+ DONE;
+})
+
(define_insn "aarch64_simd_lshr<mode>"
[(set (match_operand:VDQ_I 0 "register_operand" "=w")
(lshiftrt:VDQ_I (match_operand:VDQ_I 1 "register_operand" "w")
diff --git a/gcc/internal-fn.def b/gcc/internal-fn.def
index
e370eaa84767839c827b6ebd0c86303bcc36fa54..016301a58d83d7128817824d7c7ef92825c7e03e
100644
--- a/gcc/internal-fn.def
+++ b/gcc/internal-fn.def
@@ -217,6 +217,7 @@ DEF_INTERNAL_FLT_FN (LOG10, ECF_CONST, log10, unary)
DEF_INTERNAL_FLT_FN (LOG1P, ECF_CONST, log1p, unary)
DEF_INTERNAL_FLT_FN (LOG2, ECF_CONST, log2, unary)
DEF_INTERNAL_FLT_FN (LOGB, ECF_CONST, logb, unary)
+DEF_INTERNAL_FLT_FN (SIGNBIT, ECF_CONST, signbit, unary)
DEF_INTERNAL_FLT_FN (SIGNIFICAND, ECF_CONST, significand, unary)
DEF_INTERNAL_FLT_FN (SIN, ECF_CONST, sin, unary)
DEF_INTERNAL_FLT_FN (SINH, ECF_CONST, sinh, unary)
diff --git a/gcc/testsuite/gcc.target/aarch64/signbitv4sf.c
b/gcc/testsuite/gcc.target/aarch64/signbitv4sf.c
new file mode 100644
index
0000000000000000000000000000000000000000..aa06a5df1dbb3e295355d485b39963127a828b68
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/signbitv4sf.c
@@ -0,0 +1,35 @@
+/* { dg-do run } */
+/* { dg-additional-options "-O3 --save-temps" } */
+
+extern void abort ();
+
+#define N 1024
+float in[N] = {1.0, -1.0, -2.0, 3.0, -5.0, -8.0, 13.0, 21.0};
+int out[N];
+
+void
+foo ()
+{
+ for (int i = 0; i < N; i++)
+ out[i] = __builtin_signbit (in[i]);
+}
+
+/* { dg-final { scan-assembler-not {-2147483648} } } */
+/* { dg-final { scan-assembler {\tushr\tv[0-9]+.4s, v[0-9]+.4s, 31} } } */
+
+int
+main ()
+{
+ foo ();
+
+ for (int i = 0; i < N; i++)
+ {
+ if (in[i] >= 0.0 && out[i])
+ abort ();
+ if (in[i] < 0.0 && !out[i])
+ abort ();
+ }
+
+ return 0;
+}
+
