about summary refs log tree commit diff
path: root/sysdeps
diff options
context:
space:
mode:
authorJoe Ramsay <Joe.Ramsay@arm.com>2023-11-27 17:02:55 +0000
committerSzabolcs Nagy <szabolcs.nagy@arm.com>2023-11-29 15:03:36 +0000
commit7b12776584c51dbecb1033e107f6b9f45de47a1b (patch)
treee1a1fa3bb711f55a55d6c18b51f8f5945fc0aa4c /sysdeps
parentbc6d79f4ae99206e7ec7d6a8c5abf26cdefc8bff (diff)
downloadglibc-7b12776584c51dbecb1033e107f6b9f45de47a1b.tar.gz
glibc-7b12776584c51dbecb1033e107f6b9f45de47a1b.tar.xz
glibc-7b12776584c51dbecb1033e107f6b9f45de47a1b.zip
aarch64: Improve special-case handling in AdvSIMD double-precision libmvec routines
Avoids emitting many saves/restores of vector registers, reduces the
amount of code generated around the scalar fallback.
Diffstat (limited to 'sysdeps')
-rw-r--r--sysdeps/aarch64/fpu/v_math.h8
1 files changed, 7 insertions, 1 deletions
diff --git a/sysdeps/aarch64/fpu/v_math.h b/sysdeps/aarch64/fpu/v_math.h
index cfc87f8dd0..d286eb81b3 100644
--- a/sysdeps/aarch64/fpu/v_math.h
+++ b/sysdeps/aarch64/fpu/v_math.h
@@ -137,7 +137,13 @@ v_lookup_u64 (const uint64_t *tab, uint64x2_t idx)
 static inline float64x2_t
 v_call_f64 (double (*f) (double), float64x2_t x, float64x2_t y, uint64x2_t p)
 {
-  return (float64x2_t){ p[0] ? f (x[0]) : y[0], p[1] ? f (x[1]) : y[1] };
+  double p1 = p[1];
+  double x1 = x[1];
+  if (__glibc_likely (p[0]))
+    y[0] = f (x[0]);
+  if (__glibc_likely (p1))
+    y[1] = f (x1);
+  return y;
 }
 static inline float64x2_t
 v_call2_f64 (double (*f) (double, double), float64x2_t x1, float64x2_t x2,