aboutsummaryrefslogtreecommitdiff
path: root/sysdeps/generic
diff options
context:
space:
mode:
authorJoe Ramsay <Joe.Ramsay@arm.com>2023-06-28 12:19:36 +0100
committerSzabolcs Nagy <szabolcs.nagy@arm.com>2023-06-30 09:04:10 +0100
commitaed39a3aa3ea68b14dce3395fb14b1416541e6c6 (patch)
tree38f866205e31b1bef745122636dbaa61922cb1cc /sysdeps/generic
parent84e93afc734a3c30e35ed2d21466a44259ac577e (diff)
downloadglibc-aed39a3aa3ea68b14dce3395fb14b1416541e6c6.tar
glibc-aed39a3aa3ea68b14dce3395fb14b1416541e6c6.tar.gz
glibc-aed39a3aa3ea68b14dce3395fb14b1416541e6c6.tar.bz2
glibc-aed39a3aa3ea68b14dce3395fb14b1416541e6c6.zip
aarch64: Add vector implementations of cos routines
Replace the loop-over-scalar placeholder routines with optimised implementations from Arm Optimized Routines (AOR). Also add some headers containing utilities for aarch64 libmvec routines, and update libm-test-ulps. Data tables for new routines are used via a pointer with a barrier on it, in order to prevent overly aggressive constant inlining in GCC. This allows a single adrp, combined with offset loads, to be used for every constant in the table. Special-case handlers are marked NOINLINE in order to confine the save/restore overhead of switching from vector to normal calling standard. This way we only incur the extra memory access in the exceptional cases. NOINLINE definitions have been moved to math_private.h in order to reduce duplication. AOR exposes a config option, WANT_SIMD_EXCEPT, to enable selective masking (and later fixing up) of invalid lanes, in order to trigger fp exceptions correctly (AdvSIMD only). This is tested and maintained in AOR, however it is configured off at source level here for performance reasons. We keep the WANT_SIMD_EXCEPT blocks in routine sources to greatly simplify the upstreaming process from AOR to glibc. Reviewed-by: Szabolcs Nagy <szabolcs.nagy@arm.com>
Diffstat (limited to 'sysdeps/generic')
-rw-r--r--sysdeps/generic/math_private.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/sysdeps/generic/math_private.h b/sysdeps/generic/math_private.h
index 98b54875f5..3865dcf905 100644
--- a/sysdeps/generic/math_private.h
+++ b/sysdeps/generic/math_private.h
@@ -193,7 +193,7 @@ do { \
# undef _Mdouble_
#endif
-
+#define NOINLINE __attribute__ ((noinline))
/* Prototypes for functions of the IBM Accurate Mathematical Library. */
extern double __sin (double __x);