Daisuke Nojiri d3facbd92f Optimize memcpy ...

This speeds up memcpy by copying a word at a time if source and destination are
aligned in mod 4. That is, if n and m are a positive integer:

  4n -> 4m: aligned, 4x speed.
  4n -> 4m+1: misaligned.
  4n+1 -> 4m+1: aligned in mod 4, 4x speed.

Ran the unit test on Peppy:

  > runtest
  ...
  Running test_memcpy... (speed gain: 120300 -> 38103 us) OK
  ...

Ran make buildall -j:

  ...
  Running test_memcpy... (speed gain: 2084 -> 549 us) OK
  ...

Note misaligned case is also optimized. Unit test runs in 298 us on Peppy while
it takes about 475 with the original memcpy.

TEST=Described above.
BUG=chrome-os-partner:23720
BRANCH=none
Signed-off-by: Daisuke Nojiri <dnojiri@chromium.org>
Change-Id: Ic12260451c5efd0896d6353017cd45d29cb672db
Tested-by: Daisuke Nojiri <dnojiri@google.com>
Reviewed-on: https://chromium-review.googlesource.com/185618
Reviewed-by: Randall Spangler <rspangler@chromium.org>
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
Commit-Queue: Daisuke Nojiri <dnojiri@google.com>

2014-02-12 19:40:52 +00:00

..

acpi.c

Support DPTF charger current limiting

2014-02-08 00:14:48 +00:00

adc.c

Move ADC console command to common

2013-12-20 05:07:58 +00:00

als.c

Add EC_MEMMAP_ALS, update it once per second

2013-11-08 00:53:12 +00:00

ap_hang_detect.c

Stop hang detect timer when flags are set to 0

2014-02-05 03:21:16 +00:00

backlight_lid.c

Support backlight control via lid only

2013-09-27 23:07:21 +00:00

battery.c

Add configs for battery detect via gpio or custom function

2014-02-06 01:22:17 +00:00

build.mk

Samus: Support capsense input as keyboard events.

2014-02-08 04:15:39 +00:00

button.c

Only call button handler if keyboard protocol task defined

2014-02-07 04:13:21 +00:00

capsense.c

Samus: Support capsense input as keyboard events.

2014-02-08 04:15:39 +00:00

charge_state.c

Include battery fuel gauge temp sensor in temperature sensors

2014-02-08 04:21:26 +00:00

charger.c

Support DPTF charger current limiting

2014-02-08 00:14:48 +00:00

chipset.c

Move common chipset console commands to chipset.c

2013-04-24 09:58:22 -07:00

console_output.c

cleanup: Comments in console_output.c

2013-10-25 01:32:41 +00:00

console.c

lm4: Use low speed clock in deep sleep.

2013-10-21 23:59:38 +00:00

eoption.c

cleanup: eeprom and option comments

2013-10-25 20:12:49 +00:00

extpower_falco.c

rename power_state* to charge_state*

2014-01-07 04:53:20 +00:00

extpower_gpio.c

Move enabling AC_PRESENT interrupt to extpower_gpio.c

2013-04-02 14:12:56 -07:00

extpower_snow.c

Remove bolt, daisy, kirby, puppy, slippy boards

2013-11-21 22:21:56 +00:00

extpower_spring.c

Remove unneeded TODO comment

2013-12-10 04:40:39 +00:00

fan.c

Fix bug in Samus DPTF fan control

2013-12-10 02:13:52 +00:00

firmware_image.lds.S

Move core-specific toolchain configuration to core/ directory

2013-11-07 22:36:05 +00:00

firmware_image.S

Make a top-level config.h file to include sub-configs

2013-07-16 12:06:31 -07:00

flash.c

Convert vboot hash calculation from task to deferred function

2014-01-09 20:25:11 +00:00

fmap.c

cleanup: Remove checkpatch warnings

2013-12-19 00:12:28 +00:00

gpio.c

nyan: don't touch GPIO setting while init alternate functions.

2014-01-03 23:04:23 +00:00

hooks.c

hook_call_deferred() works before tasks have started

2014-01-09 01:33:03 +00:00

host_command.c

Add AP hang detection

2013-12-17 21:27:53 +00:00

host_event_commands.c

Completely new thermal/fan implementation

2013-08-23 10:38:36 -07:00

i2c_arbitration.c

cleanup: rename I2C_PORT_HOST to I2C_PORT_MASTER

2013-10-25 01:32:15 +00:00

i2c.c

Check for valid i2c port number on i2c host commands

2014-01-28 02:43:55 +00:00

keyboard_8042.c

Samus: Support capsense input as keyboard events.

2014-02-08 04:15:39 +00:00

keyboard_mkbp.c

cleanup: mkbp keyboard module

2013-10-30 23:10:13 +00:00

keyboard_scan.c

Fix watchdog in keyboard scan if key outside mask pressed

2014-01-29 21:38:01 +00:00

keyboard_test.c

Move keyboard dimension and key constants to keyboard_config.h

2013-03-22 11:24:29 -07:00

led_common.c

rambi: fix led command

2014-01-14 09:19:45 +00:00

lid_switch.c

Add lid switch test and enable kb_mkbp test

2013-05-08 13:24:19 -07:00

lightbar.c

cleanup: Remove checkpatch warnings

2013-12-19 00:12:28 +00:00

main.c

Initalize DMA before UART

2013-09-10 23:46:07 +00:00

memory_commands.c

Use uintptr_t when converting integer from/to pointer

2013-05-07 20:59:53 -07:00

onewire.c

Move onewire bus support from chip/lm4 to common

2013-08-02 18:22:57 -07:00

panic_output.c

extract common core code

2013-12-05 22:30:58 +00:00

pmu_tps65090_charger.c

Pit: Add Green LED function in tps65090 charger driver

2014-02-06 15:18:14 +00:00

pmu_tps65090_powerinfo.c

Add battery_get_params()

2013-12-02 22:03:51 +00:00

pmu_tps65090.c

Rename mixed-case config constants

2013-12-16 20:28:32 +00:00

port80.c

Clean up a few modules in common/

2012-10-26 09:49:38 -07:00

power_button_x86.c

cleanup: Still more TODO comments

2013-11-02 01:07:10 +00:00

power_button.c

Config option for using power button with lid closed

2014-02-01 02:48:01 +00:00

printf.c

cleanup: Remove checkpatch warnings

2013-12-19 00:12:28 +00:00

pstore_commands.c

Change host command params/response pointers to void *

2012-07-26 16:25:34 -07:00

pwm_kblight.c

Pad jump tags to 4 bytes inside the system module

2013-11-05 02:32:40 +00:00

pwm.c

Move source files to driver/ and power/ subdirs

2013-10-23 20:07:25 +00:00

queue.c

Only waste 1 byte in queue buffer

2013-06-10 01:48:44 -07:00

sha256.c

cleanup: Remove checkpatch warnings

2013-12-19 00:12:28 +00:00

shared_mem.c

Use uintptr_t when converting integer from/to pointer

2013-05-07 20:59:53 -07:00

switch.c

cleanup: Even more TODO comments

2013-11-01 20:07:24 +00:00

system.c

Protect inactive EC image from code execution

2013-12-17 01:32:24 +00:00

temp_sensor.c

cleanup: Rename and move header files

2013-10-23 21:27:40 +00:00

test_util.c

emulator: Keep fail count across sysjump

2014-01-08 03:49:36 +00:00

thermal.c

thermal: dptf: Don't clear threshold condition on set

2014-01-10 00:12:01 +00:00

throttle_ap.c

Handle multiple independent sources and types of CPU throttling

2013-09-11 01:49:48 +00:00

timer.c

ite: Add initial support for ITE IT8380 chip

2014-01-08 02:24:23 +00:00

uart_buffering.c

cleanup: Remove checkpatch warnings

2013-12-19 00:12:28 +00:00

usb_port_power_dumb.c

Pad jump tags to 4 bytes inside the system module

2013-11-05 02:32:40 +00:00

usb_port_power_smart.c

rambi: Leave 5V rail on in S3 if USB ports are powered

2014-01-23 19:32:27 +00:00

util.c

Optimize memcpy

2014-02-12 19:40:52 +00:00

vboot_hash.c

Convert vboot hash calculation from task to deferred function

2014-01-09 20:25:11 +00:00

version.c

Truncate version string to 32 characters

2013-07-19 18:01:55 -07:00

wireless.c

Split wireless power/radio control out of switch.c

2013-07-11 16:51:40 -07:00