diff options
| author |   Damjan Marion <damarion@cisco.com> | 2021-04-25 10:55:53 +0200 |
|---|---|---|
| committer |   Florin Coras <florin.coras@gmail.com> | 2021-04-25 20:48:53 +0000 |
| commit | b14c49d2275f6348640572b7b481dad43f3a00d0 (patch) | |
| tree | 4eb2dc3a39ba0119e670e78d6450871701b375e6 | |
| parent | e984831e079342865215d5511b535c8900095722 (diff) | |
vppinfra: add COMPILE_TIME_CONST() macro
Type: improvement
Change-Id: I10d7489f57bc60eb92049962b4e6ea84974f17b8
Signed-off-by: Damjan Marion <damarion@cisco.com>
| -rw-r--r-- | src/vppinfra/clib.h | 1 | ||||
| -rw-r--r-- | src/vppinfra/string.h | 2 |
2 files changed, 2 insertions, 1 deletions
diff --git a/src/vppinfra/clib.h b/src/vppinfra/clib.h index 05af8fe7168..4629a7defb8 100644 --- a/src/vppinfra/clib.h +++ b/src/vppinfra/clib.h @@ -120,6 +120,7 @@ /* Hints to compiler about hot/cold code. */ #define PREDICT_FALSE(x) __builtin_expect((x),0) #define PREDICT_TRUE(x) __builtin_expect((x),1) +#define COMPILE_TIME_CONST(x) __builtin_constant_p (x) /* * Compiler barrier diff --git a/src/vppinfra/string.h b/src/vppinfra/string.h index fb46a0c6a0d..76d345e16bc 100644 --- a/src/vppinfra/string.h +++ b/src/vppinfra/string.h @@ -143,7 +143,7 @@ memcpy_s_inline (void *__restrict__ dest, rsize_t dmax, * Optimize constant-number-of-bytes calls without asking * "too many questions for someone from New Jersey" */ - if (__builtin_constant_p (n)) + if (COMPILE_TIME_CONST (n)) { clib_memcpy_fast (dest, src, n); return EOK; |