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cpu/test/test.S

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3.3 KiB
ArmAsm
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add test assembly file
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.global _start
.text
_start:
sub, and, or don't always work
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# NOTE: nop required because cpu currently does not detect when something is needed from a later stage of the pipeline.
passes quick tests for: lui, addi, add, sub, and, or, xor, andi. jump works but does not link
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# 4 clocks allows one instruction to finish before the next reads the regfile
# AUIPC
# JAL
# JALR
# SLTI
# SLTUI
# SLL
# SRL
# SRA
# SLT
# SLTU
sub, and, or don't always work
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# lui
passes quick test: slli, srli, srai
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lui x1, 0xfedcb # x1 = 0xfedcb000
sub, and, or don't always work
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nop
nop
nop
# addi
passes quick test: slli, srli, srai
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addi x1, x1, 0x789 # x1 = 0xfedcb789
addi x2, x0, -1 # x2 = 0xffffffff
sub, and, or don't always work
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nop
nop
passes quick test: slli, srli, srai
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addi x3, x1, -0x777 # x3 = 0xfedcb012
passes quick tests for: lui, addi, add, sub, and, or, xor, andi. jump works but does not link
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nop
nop
nop
sub, and, or don't always work
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# add
passes quick test: slli, srli, srai
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add x4, x1, x2 # x4 = 0xfedcb788
sub, and, or don't always work
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nop
nop
nop
# sub
passes quick test: slli, srli, srai
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sub x5, x1, x3 # x5 = 0x00000777
sub, and, or don't always work
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nop
nop
nop
# and
passes quick test: slli, srli, srai
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and x6, x1, x2 # x6 = 0xfedcb789
and x7, x1, x0 # x7 = 0x00000000
and x8, x4, x3 # x8 = 0xfedcb000
sub, and, or don't always work
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nop
nop
nop
# or
passes quick test: slli, srli, srai
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or x9, x1, x2 # x9 = 0xffffffff
passes quick tests for: lui, addi, add, sub, and, or, xor, andi. jump works but does not link
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or x10, x1, x0 # x10 = 0xfedcb789
or x11, x4, x3 # x11 = 0x0xfedcb79a
sub, and, or don't always work
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nop
nop
nop
passes quick tests for: lui, addi, add, sub, and, or, xor, andi. jump works but does not link
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# xor
xor x12, x1, x2 # x12 = 0x01234876
xor x13, x1, x1 # x13 = 0x00000000
xor x14, x0, x2 # x14 = 0xffffffff
nop
nop
nop
# andi
andi x15, x2, -1348 # x15 = 0xfffffabc -1348 = 0xfffffabc
andi x16, x2, 0x123 # x16 = 0x00000123
andi x17, x1, -1645 # x17 = 0xfedcb181 -1645 = 0xfffff993
nop
nop
nop
passes quick test: ori
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# ori
ori x18, x2, 0x000 # x18 = 0xffffffff
ori x19, x0, 0x768 # x19 = 0x768
ori x20, x1, 0x7ff # x20 = 0xfedcb7ff
nop
nop
nop
passes quick tests for: lui, addi, add, sub, and, or, xor, andi. jump works but does not link
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passes quick test: xori
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# xori
xori x21, x2, 0x123 # x21 = 0xfffffedc
xori x22, x1, 0x788 # x22 = 0xfedcb001
xori x23, x0, 0x788 # x23 = 0x00000788
nop
nop
nop
sub, and, or don't always work
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passes quick test: slli, srli, srai
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# slli
slli x24, x23, 4 # x24 = 0x00007880
slli x25, x2, 1 # x25 = 0xfffffffe
slli x26, x2, 63 # x26 = 0x00000000 // NOTE: I would expect GCC to throw an error here. It tolerates up to 63 bit shift despite assembling for 32b
slli x27, x2, 31 # x27 = 0x80000000
nop
nop
nop
# srli
srli x28, x23, 4 # x28 = 0x00000078
srli x29, x2, 1 # x29 = 0x7fffffff
srli x30, x2, 63 # x30 = 0x00000000 // NOTE: I would expect GCC to throw an error here. It tolerates up to 63 bit shift despite assembling for 32b
srli x3, x2, 31 # x3 = 0x00000001
nop
nop
nop
# srai
srai x4, x23, 4 # x4 = 0x00000078 // fails
srai x5, x2, 1 # x5 = 0xffffffff
srai x6, x2, 63 # x6 = 0xffffffff // NOTE: I would expect GCC to throw an error here. It tolerates up to 63 bit shift despite assembling for 32b
srai x7, x2, 31 # x7 = 0xffffffff
nop
nop
nop
sub, and, or don't always work
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passes quick tests for: lui, addi, add, sub, and, or, xor, andi. jump works but does not link
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# counter and infinite loop
sub, and, or don't always work
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nop
nop
nop
passes quick test: slli, srli, srai
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addi x31, x0, 1 # x1 = 1
add test assembly file
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successfully using assembler to generate .hex rather than writing straight machine code
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loop:
sub, and, or don't always work
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nop
nop
nop
passes quick test: slli, srli, srai
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addi x31, x31, 1 # increment x1
sub, and, or don't always work
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nop
nop
nop
j loop # loop forever
nop
nop
nop
nop
nop
nop
successfully using assembler to generate .hex rather than writing straight machine code
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add test assembly file
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.data
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