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I think this properly stalls for all implemented instructions so I don't need nops

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Brendan Haines
2020-11-07 00:47:20 -07:00
parent 1290418aa3
commit 82cbaba7e5
3 changed files with 147 additions and 41 deletions
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58
test/test.S
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@ -154,7 +154,7 @@ _start:
nop
sub x6, x0, x3 # x6 = 0xffffffff
sub x7, x0, x4 # x7 = 0xfffffff0
sub x8, x0, x5 # x7 = 0xffffff00
sub x8, x0, x5 # x8 = 0xffffff00
nop
slti x9, x3, 0 # x9 = 0x00000000
slti x10, x3, 1 # x10 = 0x00000000
@ -206,6 +206,45 @@ _start:
nop
nop
# jal
jal x1, test_jalr
nop
nop
nop
# can I remove nops now?
addi x6, x0, 0 # x6 = 0
nop
nop
nop
addi x6, x0, 1 # x6 = 1
addi x7, x6, 1 # x7 = 2
addi x8, x6, 1 # x8 = 2
addi x9, x6, 1 # x9 = 2
test1:
# TODO: redo these tests because my nop test messed it up
# beq
addi x30, x0, 1 # x30 = 1
addi x9, x8, 0 # x9 == x8
nop
nop
nop
bne x0, x0, fail # 0 == 0
bne x9, x8, fail # x9 == x8
bne x7, x8, test2 # x7 != x8
j fail
test2:
# beq
addi x30, x0, 2 # x30 = 2
beq x0, x8, fail # 0 != x8
beq x7, x8, fail # x7 != x8
beq x8, x9, test3 # x8 == x9
j fail
test3:
# counter and infinite loop
nop
@ -234,4 +273,21 @@ loop:
nop
nop
# jalr
test_jalr:
addi x2, x0, 0x12 # x2 = 0x12
jalr x0, x1, 0 # return
fail:
nop
nop
nop
jal x0, fail # loop forever
nop
nop
nop
nop
nop
nop
.data