This patch adds the fix_truncv4sfv4hi2 (V4SF->V4HI) pattern which is implemented
using fix_truncv4sfv4si2 (V4SF->V4SI) and then truncv4siv4hi2 (V4SI->V4HI).
PR target/113882
gcc/ChangeLog:
* config/aarch64/aarch64-simd.md (fix_truncv4sfv4hi2): New pattern.
gcc/testsuite/ChangeLog:
* gcc.target/aarch64/fix_trunc2.c: New test.
Signed-off-by: Pengxuan Zheng <quic_pzh...@quicinc.com>
---
gcc/config/aarch64/aarch64-simd.md | 13 +++++++++++++
gcc/testsuite/gcc.target/aarch64/fix_trunc2.c | 14 ++++++++++++++
2 files changed, 27 insertions(+)
create mode 100644 gcc/testsuite/gcc.target/aarch64/fix_trunc2.c
diff --git a/gcc/config/aarch64/aarch64-simd.md
b/gcc/config/aarch64/aarch64-simd.md
index 868f4486218..096f7b56a27 100644
--- a/gcc/config/aarch64/aarch64-simd.md
+++ b/gcc/config/aarch64/aarch64-simd.md
@@ -3032,6 +3032,19 @@ (define_expand
"<fix_trunc_optab><VHSDF:mode><fcvt_target>2"
"TARGET_SIMD"
{})
+
+(define_expand "fix_truncv4sfv4hi2"
+ [(match_operand:V4HI 0 "register_operand")
+ (match_operand:V4SF 1 "register_operand")]
+ "TARGET_SIMD"
+ {
+ rtx tmp = gen_reg_rtx (V4SImode);
+ emit_insn (gen_fix_truncv4sfv4si2 (tmp, operands[1]));
+ emit_insn (gen_truncv4siv4hi2 (operands[0], tmp));
+ DONE;
+ }
+)
+
(define_expand "ftrunc<VHSDF:mode>2"
[(set (match_operand:VHSDF 0 "register_operand")
(unspec:VHSDF [(match_operand:VHSDF 1 "register_operand")]
diff --git a/gcc/testsuite/gcc.target/aarch64/fix_trunc2.c
b/gcc/testsuite/gcc.target/aarch64/fix_trunc2.c
new file mode 100644
index 00000000000..57cc00913a3
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/fix_trunc2.c
@@ -0,0 +1,14 @@
+/* { dg-do compile } */
+/* { dg-options "-O2" } */
+
+void
+f (short *__restrict a, float *__restrict b)
+{
+ a[0] = b[0];
+ a[1] = b[1];
+ a[2] = b[2];
+ a[3] = b[3];
+}
+
+/* { dg-final { scan-assembler-times {fcvtzs\tv[0-9]+.4s, v[0-9]+.4s} 1 } } */
+/* { dg-final { scan-assembler-times {xtn\tv[0-9]+.4h, v[0-9]+.4s} 1 } } */
--
2.17.1
