[gcc r9-8952] AArch64: Implement missing vrndns_f32 intrinsic

[Kyrylo Tkachov]

https://gcc.gnu.org/g:61291c4b7d429ddd12536732759bd56708e78e14

commit r9-8952-g61291c4b7d429ddd12536732759bd56708e78e14
Author: Kyrylo Tkachov <kyrylo.tkachov@arm.com>
Date:   Wed Sep 23 12:02:29 2020 +0100

    AArch64: Implement missing vrndns_f32 intrinsic
    
    This patch implements the missing vrndns_f32 intrinsic. This operates on a scalar float32_t value.
    It can be mapped down to a __builtin_aarch64_frintnsf builtin.
    
    This patch does that.
    
    Bootstrapped and tested on aarch64-none-linux-gnu.
    
    gcc/
            PR target/71233
            * config/aarch64/aarch64-simd-builtins.def (frintn): Use BUILTIN_VHSDF_HSDF
            for modes.  Remove explicit hf instantiation.
            * config/aarch64/arm_neon.h (vrndns_f32): Define.
    
    gcc/testsuite/
            PR target/71233
            * gcc.target/aarch64/simd/vrndns_f32_1.c: New test.
    
    (cherry picked from commit 02b5377b3766804059b7824330d33d0e1cef2e5b)

Diff:
---
 gcc/config/aarch64/aarch64-simd-builtins.def         |  3 +--
 gcc/config/aarch64/arm_neon.h                        |  7 +++++++
 gcc/testsuite/gcc.target/aarch64/simd/vrndns_f32_1.c | 13 +++++++++++++
 3 files changed, 21 insertions(+), 2 deletions(-)

diff --git a/gcc/config/aarch64/aarch64-simd-builtins.def b/gcc/config/aarch64/aarch64-simd-builtins.def
index f6c096b9186..20af5ebb5c7 100644
--- a/gcc/config/aarch64/aarch64-simd-builtins.def
+++ b/gcc/config/aarch64/aarch64-simd-builtins.def
@@ -314,12 +314,11 @@
   BUILTIN_VHSDF (UNOP, nearbyint, 2)
   BUILTIN_VHSDF (UNOP, rint, 2)
   BUILTIN_VHSDF (UNOP, round, 2)
-  BUILTIN_VHSDF_DF (UNOP, frintn, 2)
+  BUILTIN_VHSDF_HSDF (UNOP, frintn, 2)
 
   VAR1 (UNOP, btrunc, 2, hf)
   VAR1 (UNOP, ceil, 2, hf)
   VAR1 (UNOP, floor, 2, hf)
-  VAR1 (UNOP, frintn, 2, hf)
   VAR1 (UNOP, nearbyint, 2, hf)
   VAR1 (UNOP, rint, 2, hf)
   VAR1 (UNOP, round, 2, hf)
diff --git a/gcc/config/aarch64/arm_neon.h b/gcc/config/aarch64/arm_neon.h
index bf091c0e677..5a692a5096c 100644
--- a/gcc/config/aarch64/arm_neon.h
+++ b/gcc/config/aarch64/arm_neon.h
@@ -26204,6 +26204,13 @@ vrndmq_f64 (float64x2_t __a)
 
 /* vrndn  */
 
+__extension__ extern __inline float32_t
+__attribute__ ((__always_inline__, __gnu_inline__, __artificial__))
+vrndns_f32 (float32_t __a)
+{
+  return __builtin_aarch64_frintnsf (__a);
+}
+
 __extension__ extern __inline float32x2_t
 __attribute__ ((__always_inline__, __gnu_inline__, __artificial__))
 vrndn_f32 (float32x2_t __a)
diff --git a/gcc/testsuite/gcc.target/aarch64/simd/vrndns_f32_1.c b/gcc/testsuite/gcc.target/aarch64/simd/vrndns_f32_1.c
new file mode 100644
index 00000000000..960e4f6f768
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/simd/vrndns_f32_1.c
@@ -0,0 +1,13 @@
+/* { dg-do compile } */
+/* { dg-options "-O" } */
+
+#include <arm_neon.h>
+
+float32_t
+test (float32_t a)
+{
+  return vrndns_f32 (a);
+}
+
+/* { dg-final { scan-assembler-times "frintn\\ts\[0-9\]+, s\[0-9\]+" 1 } } */
+