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Nicolas Boichat 49ff62bf0b rsa: Optimization of multiplications for Cortex-M0 
We multiply 2 32-bit numbers (and not 64-bit numbers), and then add
another 32-bit number, which makes it possible to optimize the
assembly and save a few instructions.

With -O3, 3072-bit exponent, lower verification time from 122 ms to
104 ms on STM32F072 @48Mhz.

Optimized mac function from Dmitry Grinberg <dmitrygr@google.com>.

BRANCH=poppy
BUG=b:35647963
BUG=b:77608104
TEST=On staff, flash, verification successful
TEST=make test-rsa, make test-rsa3
TEST=Flash test-utils and test-rsa to hammer => pass

Change-Id: I584c54c631a3f59f691849a279b308e8d4b4b22d
Signed-off-by: Nicolas Boichat <drinkcat@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/449024
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
2018-05-28 22:46:28 -07:00
baseboard
careena: Change LED colors
2018-05-25 20:31:50 -07:00
board
hammer: Increase PDU size to 4k
2018-05-28 07:30:36 -07:00
builtin
Add uint_(least|fast)*_t types
2017-08-07 19:29:13 -07:00
chip
test/build.mk: Allow boards to specify test lists
2018-05-28 07:30:36 -07:00
common
rsa: Optimization of multiplications for Cortex-M0
2018-05-28 22:46:28 -07:00
core
rsa: Optimization of multiplications for Cortex-M0
2018-05-28 22:46:28 -07:00
cts
eCTS: Run openocd and lsusb as a root
2017-07-08 20:38:53 -07:00
docs
g: rename usb_updater into gsctool
2017-10-10 22:13:43 -07:00
driver
sn5s330: disable under voltage protection
2018-05-24 19:30:22 -07:00
extra
rma_reset: add p256 ECC option
2018-05-28 15:26:29 -07:00
include
rsa: Optimization of multiplications for Cortex-M0
2018-05-28 22:46:28 -07:00
power
APL/GLK: Clean up UART buffer before shutdown
2018-05-23 16:47:50 -07:00
test
rsa: Optimization of multiplications for Cortex-M0
2018-05-28 22:46:28 -07:00
util
hammer: Increase PDU size to 4k
2018-05-28 07:30:36 -07:00
.checkpatch.conf
checkpatch: prevent stupid complaints about description title
2016-07-21 13:13:27 -07:00
.clang-format
ec: Add .clang-format
2018-05-02 22:20:48 -07:00
.gitignore
Makefile.rules: Add targets to see file size differences
2016-11-15 17:43:21 -08:00
COMMIT-QUEUE.ini
Add fizz-no-vmtest-pre-cq to the pre-cq set
2017-06-21 20:05:02 +00:00
LICENSE
Add LICENSE file to project
2012-05-11 09:11:52 -07:00
Makefile
make: add size calculations
2018-05-14 12:28:05 -07:00
Makefile.rules
Makefile.rules: Add buildalltests target
2018-05-26 00:21:41 -07:00
Makefile.toolchain
Tell linker about the arch and CPU it's linking for
2018-05-18 10:05:12 -07:00
OWNERS
Add OWNERS files
2014-04-02 19:58:53 +00:00
PRESUBMIT.cfg
PRESUBMIT: give real names
2018-05-02 22:21:09 -07:00
README
README: Add link to quick-build instructions
2015-12-07 13:49:35 -08:00
README.fmap
Update EC config and FMAP to reserve room for vboot signatures
2012-05-04 14:42:58 -07:00
setup.py
servo: add usb_console to chroot
2017-11-16 21:07:40 -08:00

README 

For an overview of the Embedded Controller firmware, refer to

http://www.chromium.org/chromium-os/2014-firmware-summit

For instructions on building from source, refer to

http://www.chromium.org/chromium-os/ec-development/getting-started-building-ec-images-quickly
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