mirror/mbedtls
1
0
Fork 0
mirror of https://github.com/Mbed-TLS/mbedtls.git synced 2025-01-30 15:32:58 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

Adjust default unroll settings

Browse Source 
Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
This commit is contained in:
Dave Rodgman 2024-03-01 15:12:59 +00:00
parent 40c837dc40
commit 8a4df2293a
1 changed files with 15 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
library/sha3.c
View File

@ -20,26 +20,29 @@
* Unrolling has a major impact on both performance and code size. gcc performance benefits a lot
* from manually unrolling at higher optimisation levels.
*
* Rolling up the theta loop saves a lot of code-size at small performance cost. The code-size
* saving then enables us to unroll the other loops for a net code-size saving with a net
* performance win.
*
* Depending on your size/perf priorities, compiler and target, it may be beneficial to adjust
* these; the defaults here should give sensible trade-offs for gcc and clang.
* these; the defaults here should give sensible trade-offs for gcc and clang on aarch64 and
* x86-64.
*/
#if !defined(MBEDTLS_SHA3_THETA_UNROLL)
#if defined(__OPTIMIZE_SIZE__)
#define MBEDTLS_SHA3_THETA_UNROLL 0 //no-check-names
#else
#define MBEDTLS_SHA3_THETA_UNROLL 1 //no-check-names
#endif
#endif
#if !defined(MBEDTLS_SHA3_PI_UNROLL)
#if defined(__OPTIMIZE_SIZE__)
#define MBEDTLS_SHA3_PI_UNROLL 0 //no-check-names
#else
#define MBEDTLS_SHA3_PI_UNROLL 1 //no-check-names
#endif
#endif
#if !defined(MBEDTLS_SHA3_CHI_UNROLL)
#if !defined(MBEDTLS_COMPILER_IS_GCC) || defined(__OPTIMIZE_SIZE__)
/* GCC doesn't perform well with the rolled-up version, especially at -O2, so only enable on gcc
* if optimising for size. Always enable for other compilers. */
#define MBEDTLS_SHA3_CHI_UNROLL 0 //no-check-names
#else
#if defined(__OPTIMIZE_SIZE__)
#define MBEDTLS_SHA3_CHI_UNROLL 1 //no-check-names
#else
#define MBEDTLS_SHA3_CHI_UNROLL 0 //no-check-names
#endif
#endif
#if !defined(MBEDTLS_SHA3_RHO_UNROLL)