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# See LICENSE for license details.
#*****************************************************************************
# lrsr.S
#-----------------------------------------------------------------------------
#
# Test LR/SC instructions.
#
#include "riscv_test.h"
#include "test_macros.h"
RVTEST_RV64U
RVTEST_CODE_BEGIN
# get a unique core id
la a0, coreid
li a1, 1
amoadd.w a2, a1, (a0)
# for now, only run this on core 0
1:li a3, 1
bgeu a2, a3, 1b
1: lw a1, (a0)
bltu a1, a3, 1b
# make sure that sc without a reservation fails.
TEST_CASE( 2, a4, 1, \
la a0, foo; \
sc.w a4, x0, (a0); \
)
# make sure that sc with the wrong reservation fails.
# TODO is this actually mandatory behavior?
TEST_CASE( 3, a4, 1, \
la a0, foo; \
add a1, a0, 1024; \
lr.w a1, (a1); \
sc.w a4, a1, (a0); \
)
# have each core add its coreid to foo 1000 times
la a0, foo
li a1, 1000
1: lr.w a4, (a0)
add a4, a4, a2
sc.w a4, a4, (a0)
bnez a4, 1b
add a1, a1, -1
bnez a1, 1b
# wait for all cores to finish
la a0, barrier
li a1, 1
amoadd.w x0, a1, (a0)
1: lw a1, (a0)
blt a1, a3, 1b
fence
# expected result is 1000*ncores*(ncores-1)/2
TEST_CASE( 4, a2, 0, \
la a0, foo; \
li a1, 500; \
mul a1, a1, a3; \
add a2, a3, -1; \
mul a1, a1, a2; \
lw a2, (a0); \
sub a2, a2, a1; \
)
TEST_PASSFAIL
RVTEST_CODE_END
.data
RVTEST_DATA_BEGIN
TEST_DATA
coreid: .word 0
barrier: .word 0
foo: .word 0
RVTEST_DATA_END
|
