Commit de030821 authored by Ben Walker's avatar Ben Walker Committed by Jim Harris
Browse files

util: Generate multiple versions of spdk_u32log2 



Generate multiple versions for various architectures automatically.

Fixes issue #713

Change-Id: I757a1d05e54c938b66dd5b2ec255ad960bb89945
Signed-off-by: default avatarBen Walker <benjamin.walker@intel.com>
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/463550


Tested-by: default avatarSPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: default avatarJim Harris <james.r.harris@intel.com>
Reviewed-by: default avatarChangpeng Liu <changpeng.liu@intel.com>
parent 236dbd95

include/spdk/util.h

+12 −0
Original line number Diff line number Diff line
@@ -57,6 +57,12 @@ extern "C" { 
/* Ceiling division of unsigned integers */

#define SPDK_CEIL_DIV(x,y) (((x)+(y)-1)/(y))



/* The following will automatically generate several version of

 * this function, targeted at different architectures. This

 * is only supported by GCC 6 or newer. */

#if defined(__GNUC__) && __GNUC__ >= 6 && !defined(__clang__)

__attribute__((target_clones("bmi", "arch=core2", "arch=atom", "default")))

#endif

static inline uint32_t

spdk_u32log2(uint32_t x)

{
@@ -73,6 +79,12 @@ spdk_align32pow2(uint32_t x) 
	return 1u << (1 + spdk_u32log2(x - 1));

}



/* The following will automatically generate several version of

 * this function, targeted at different architectures. This

 * is only supported by GCC 6 or newer. */

#if defined(__GNUC__) && __GNUC__ >= 6 && !defined(__clang__)

__attribute__((target_clones("bmi", "arch=core2", "arch=atom", "default")))

#endif

static inline uint64_t

spdk_u64log2(uint64_t x)

{