esp-idf/components/esp32/test/test_fastbus_asm.S
antti d390449371 add unit tests to esp-idf
rename nvs host test folder, modify .gitlab-ci.yml

remove unit-test-app build

re-format unit test files

remove extra newlines in project.mk

some refactoring for unit test part in project.mk

add build files of unit-test-app in gitignore

add README.md for unit test app

correct headings in README.md

remove files and make minor tweaks in unit test app

update .gitlab-ci.yml to use unit test app

delete unused lines in component_wrapper.mk

delete periph_i2s.h and lcd test

add text floating point in components/esp32/test/Kconfig

correct idf test build paths in .gitlab-ci.yml
2016-11-22 14:45:50 +08:00

33 lines
904 B
ArmAsm

/*
This little bit of code is executed in-place by one CPU, but copied to a different memory region
by the other CPU. Make sure it stays position-independent.
*/
.text
.align 4
.global test_fastbus_cp
.type test_fastbus_cp,@function
//Args:
//a2 - fifo addr
//a3 - buf addr
//a4 - len
//a5 - ptr to int to use
test_fastbus_cp:
entry a1,64
back:
beqi a4, 0, out //check if loop done
s32i a4, a5, 0 //store value, for shits and/or giggles
memw //make sure write happens
l32i a4, a5, 0 //load value again, to thwart any prediction in the pipeline
bbsi a4, 0, pred //Random jump to check predictive reads. Both branches should do the same.
l32i a6, a2, 0 //read from fifo 1
j predout
pred:
l32i a6, a2, 0 //read from fifo 2
predout:
s8i a6, a3, 0 //store result
addi a3, a3, 1 //inc ptr
addi a4, a4, -1 //next
j back //loop again
out:
retw //and we are done