OpenCellular

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Files

Nicolas Boichat ecd0d1b576 rsa: Further optimization of multiplications for Cortex-M0

In RSA, we often need to actually compute (a*b)+c+d: provide some
assembly optimized functions for that.

With -O3, 3072-bit exponent, lower verification time from 104 ms to
88 ms on STM32F072 @48Mhz.

BRANCH=poppy
BUG=b:35647963
BUG=b:77608104
TEST=On staff, flash, verification successful
TEST=make test-rsa, make test-rsa3
TEST=make BOARD=hammer test-utils test-rsa3, test on board

Change-Id: I80e8a7258d091e4f6adea11797729ac657dfd85d
Signed-off-by: Nicolas Boichat <drinkcat@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/1071411
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>

2018-05-29 06:02:19 -07:00

curve25519

core/cortex-m0/curve25519: Remove unused variants

2017-07-04 06:51:00 -07:00

include

math_util: Use HW instruction for int_sqrtf when available

2017-06-19 15:33:09 -07:00

atomic.h

cortex-m0: Constrain target register in atomic read

2015-08-11 19:52:40 +00:00

build.mk

rsa: Optimization of multiplications for Cortex-M0