2020-11-10 00:19:42 -07:00
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# NOTE: .text .data .bss must occur in that order
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2020-09-27 18:04:08 -06:00
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.global _start
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2020-11-10 00:19:42 -07:00
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2020-09-27 18:04:08 -06:00
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.text
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_start:
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2020-10-11 23:03:14 -06:00
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2020-10-03 13:49:14 -06:00
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# lui
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2020-10-11 23:36:11 -06:00
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lui x1, 0xfedcb # x1 = 0xfedcb000
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2020-10-03 13:49:14 -06:00
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# addi
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2021-07-02 02:39:13 -06:00
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addi x1, x1, 0x789 # x1 = 0xfedcb789
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2020-10-11 23:36:11 -06:00
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addi x2, x0, -1 # x2 = 0xffffffff
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addi x3, x1, -0x777 # x3 = 0xfedcb012
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2020-10-03 13:49:14 -06:00
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# add
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2020-10-11 23:36:11 -06:00
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add x4, x1, x2 # x4 = 0xfedcb788
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2020-10-03 13:49:14 -06:00
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# sub
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2020-10-11 23:36:11 -06:00
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sub x5, x1, x3 # x5 = 0x00000777
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2020-10-03 13:49:14 -06:00
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# and
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2020-10-11 23:36:11 -06:00
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and x6, x1, x2 # x6 = 0xfedcb789
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and x7, x1, x0 # x7 = 0x00000000
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and x8, x4, x3 # x8 = 0xfedcb000
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2020-10-03 13:49:14 -06:00
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# or
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2020-10-11 23:36:11 -06:00
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or x9, x1, x2 # x9 = 0xffffffff
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2020-10-11 23:03:14 -06:00
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or x10, x1, x0 # x10 = 0xfedcb789
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2020-11-14 23:04:24 -07:00
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or x11, x4, x3 # x11 = 0xfedcb79a
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2020-10-03 13:49:14 -06:00
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2020-10-11 23:03:14 -06:00
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# xor
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xor x12, x1, x2 # x12 = 0x01234876
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xor x13, x1, x1 # x13 = 0x00000000
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xor x14, x0, x2 # x14 = 0xffffffff
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# andi
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andi x15, x2, -1348 # x15 = 0xfffffabc -1348 = 0xfffffabc
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andi x16, x2, 0x123 # x16 = 0x00000123
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andi x17, x1, -1645 # x17 = 0xfedcb181 -1645 = 0xfffff993
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2020-10-11 23:06:29 -06:00
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# ori
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ori x18, x2, 0x000 # x18 = 0xffffffff
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ori x19, x0, 0x768 # x19 = 0x768
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ori x20, x1, 0x7ff # x20 = 0xfedcb7ff
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2020-10-11 23:03:14 -06:00
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2020-10-11 23:09:08 -06:00
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# xori
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xori x21, x2, 0x123 # x21 = 0xfffffedc
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xori x22, x1, 0x788 # x22 = 0xfedcb001
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xori x23, x0, 0x788 # x23 = 0x00000788
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2020-10-03 13:49:14 -06:00
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2020-10-11 23:36:11 -06:00
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# slli
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slli x24, x23, 4 # x24 = 0x00007880
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slli x25, x2, 1 # x25 = 0xfffffffe
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2020-10-16 18:25:10 -06:00
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slli x26, x2, 63 # x26 = 0x80000000 # NOTE: gcc should not allow this since shamt is only 5 bits. discarding high bit so 63 = 31
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2020-11-07 00:53:49 -07:00
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slli x27, x2, 31 # x27 = 0x80000000
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2020-10-11 23:36:11 -06:00
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# srli
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srli x28, x23, 4 # x28 = 0x00000078
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srli x29, x2, 1 # x29 = 0x7fffffff
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2020-10-16 18:25:10 -06:00
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srli x30, x2, 63 # x30 = 0x00000001 # NOTE: gcc should not allow this since shamt is only 5 bits. discarding high bit so 63 = 31
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2020-11-07 00:53:49 -07:00
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srli x3, x2, 31 # x3 = 0x00000001
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2020-10-11 23:36:11 -06:00
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# srai
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2020-10-16 18:25:10 -06:00
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srai x4, x23, 4 # x4 = 0x00000078
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srai x5, x2, 1 # x5 = 0xffffffff
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srai x6, x2, 63 # x6 = 0xffffffff # NOTE: gcc should not allow this since shamt is only 5 bits. discarding high bit so 63 = 31
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2020-11-07 00:53:49 -07:00
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srai x7, x2, 31 # x7 = 0xffffffff
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2020-10-16 18:25:10 -06:00
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# sll
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addi x8, x0, 4 # x8 = 0x00000004
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addi x9, x0, 1 # x9 = 0x00000001
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addi x10, x0, 63 # x10 = 0x0000003f
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addi x11, x0, 31 # x11 = 0x0000001f
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sll x12, x23, x8 # x12 = 0x00007880 # 4
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sll x13, x2, x9 # x13 = 0xfffffffe # 1
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sll x14, x2, x10 # x14 = 0x80000000 # 63 = 31
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sll x15, x2, x11 # x15 = 0x80000000 # 31
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sll x16, x1, x0 # x16 = 0xfedcb789 # 0
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sll x17, x1, x2 # x17 = 0x80000000 # -1=31
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# srl
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srl x18, x23, x8 # x18 = 0x00000078 # 4
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srl x19, x2, x9 # x17 = 0x7fffffff # 1
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srl x20, x2, x10 # x20 = 0x00000001 # 63 = 31
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srl x21, x2, x11 # x21 = 0x00000001 # 31
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srl x22, x1, x0 # x22 = 0xfedcb789 # 0
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srl x24, x1, x2 # x24 = 0x00000001 # -1=31
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# sra
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sra x25, x23, x8 # x25 = 0x00000078 # 4
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sra x26, x2, x9 # x26 = 0xffffffff # 1
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sra x27, x2, x10 # x27 = 0xffffffff # 63 = 31
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sra x28, x2, x11 # x28 = 0xffffffff # 31
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sra x29, x1, x0 # x29 = 0xfedcb789 # 0
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sra x30, x1, x2 # x30 = 0xffffffff # -1=31
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2020-10-03 13:49:14 -06:00
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2020-10-16 18:51:51 -06:00
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# slti
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addi x3, x0, 1 # x3 = 0x00000001
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addi x4, x0, 0x010 # x4 = 0x00000010
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addi x5, x0, 0x100 # x5 = 0x00000100
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sub x6, x0, x3 # x6 = 0xffffffff
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sub x7, x0, x4 # x7 = 0xfffffff0
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2020-11-07 00:47:20 -07:00
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sub x8, x0, x5 # x8 = 0xffffff00
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2020-10-16 18:51:51 -06:00
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slti x9, x3, 0 # x9 = 0x00000000
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slti x10, x3, 1 # x10 = 0x00000000
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slti x11, x3, 2 # x11 = 0x00000001
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slti x12, x3, -1 # x12 = 0x00000000
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slti x13, x7, 0 # x13 = 0x00000001
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slti x14, x7, -17 # x14 = 0x00000000
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# sltiu
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sltiu x15, x3, 0 # x15 = 0x00000000
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sltiu x16, x3, 1 # x16 = 0x00000000
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sltiu x17, x3, 2 # x17 = 0x00000001
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sltiu x18, x3, -1 # x18 = 0x00000001 # -1=0xffffffff
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sltiu x19, x7, 0 # x19 = 0x00000000
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sltiu x20, x7, -15 # x20 = 0x00000001 # -15=0xfffffff1
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# slt
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slt x21, x0, x3 # x21 = 0x00000001
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slt x22, x3, x0 # x22 = 0x00000000
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slt x23, x3, x3 # x23 = 0x00000000
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slt x24, x3, x6 # x24 = 0x00000000
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slt x25, x6, x3 # x25 = 0x00000001
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# sltu
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sltu x26, x0, x3 # x26 = 0x00000001
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sltu x27, x3, x0 # x27 = 0x00000000
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sltu x28, x3, x3 # x28 = 0x00000000
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sltu x29, x3, x6 # x29 = 0x00000001
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sltu x30, x6, x3 # x30 = 0x00000000
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2020-10-16 18:59:25 -06:00
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# auipc
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auipc x3, 0 # x3 = pc + 0
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auipc x4, 3 # x4 = pc + 0x3000
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auipc x5, 0xfffff # x5 = pc + 0xfffff000
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2020-11-07 00:54:50 -07:00
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# TODO: verify auipc adds and does not concatenate (must have PC>0xfff to test this)
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2020-10-16 18:59:25 -06:00
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2020-11-07 00:47:20 -07:00
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# jal
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jal x1, test_jalr
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2020-11-09 20:01:25 -07:00
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test1:
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# beq
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addi x30, x0, 1 # x30 = 1
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addi x9, x8, 0 # x9 = 0xffffff00
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bne x0, x0, fail # 0 == 0
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bne x9, x8, fail # x9 == x8
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2020-11-14 23:48:08 -07:00
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bne x7, x8, test1_done # x7 != x8
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2020-11-09 20:01:25 -07:00
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j fail
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2020-11-14 23:48:08 -07:00
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test1_done:
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2020-11-09 20:01:25 -07:00
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test2:
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# beq
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addi x30, x0, 2 # x30 = 2
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beq x0, x8, fail # 0 != x8
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beq x7, x8, fail # x7 != x8
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2020-11-14 23:48:08 -07:00
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beq x8, x9, test2_done # x8 == x9
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2020-11-09 20:01:25 -07:00
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j fail
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2020-11-14 23:48:08 -07:00
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test2_done:
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2020-11-09 20:01:25 -07:00
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test3:
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2020-11-09 20:22:18 -07:00
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# blt
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2020-11-09 20:01:25 -07:00
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addi x30, x0, 3 # x30 = 3
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blt x8, x9, fail # x8 == x9
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blt x7, x8, fail # x7 > x8
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blt x30, x8, fail # x30 > x8
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2020-11-14 23:48:08 -07:00
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blt x8, x7, test3_done # x8 < x7
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2020-11-09 20:01:25 -07:00
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j fail
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2020-11-14 23:48:08 -07:00
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test3_done:
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2020-11-09 20:01:25 -07:00
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test4:
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2020-11-09 20:22:18 -07:00
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# bltu
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2020-11-09 20:01:25 -07:00
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addi x30, x0, 4 # x30 = 4
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bltu x8, x9, fail # x8 == x9
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2020-11-09 20:22:18 -07:00
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bltu x7, x8, fail # x7 > x8
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2020-11-14 23:48:08 -07:00
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bltu x30, x8, test4_done # x30 < x8 unsigned
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2020-11-09 20:22:18 -07:00
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j fail
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2020-11-14 23:48:08 -07:00
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test4_done:
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2020-11-09 20:01:25 -07:00
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test5:
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addi x30, x0, 5 # x30 = 5
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2020-11-14 23:48:08 -07:00
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bltu x8, x7, test5_done # x8 < x7
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2020-11-09 20:22:18 -07:00
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j fail
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2020-11-14 23:48:08 -07:00
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test5_done:
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2020-11-09 20:22:18 -07:00
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test6:
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# bne
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addi x30, x0, 6 # x30 = 6
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bne x0, x0, fail # 0 == 0
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bne x8, x9, fail # 0 == 0
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2020-11-14 23:48:08 -07:00
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bne x8, x0, test6_done # x8 != 0
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2020-11-09 20:22:18 -07:00
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j fail
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2020-11-14 23:48:08 -07:00
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test6_done:
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2020-11-09 20:22:18 -07:00
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test7:
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# bge
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addi x30, x0, 7 # x30 = 7
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bge x8, x7, fail # x8 < x7
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2020-11-14 23:48:08 -07:00
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bge x7, x7, test7_done # x7 == x7
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2020-11-09 20:22:18 -07:00
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j fail
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2020-11-14 23:48:08 -07:00
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test7_done:
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2020-11-09 20:22:18 -07:00
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test8:
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addi x30, x0, 8 # x30 = 8
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bge x8, x0, fail # x8 < 0
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2020-11-14 23:48:08 -07:00
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bge x7, x8, test8_done # x7 > x8
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2020-11-09 20:22:18 -07:00
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j fail
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2020-11-14 23:48:08 -07:00
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test8_done:
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2020-11-09 20:22:18 -07:00
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test9:
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# bgeu
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addi x30, x0, 9 # x30 = 9
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bgeu x8, x7, fail # x8 < x7
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bgeu x0, x8, fail # 0 < x8 unsigned
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2020-11-14 23:48:08 -07:00
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bgeu x8, x0, test9_done # x8 > 0 unsigned
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2020-11-09 20:22:18 -07:00
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j fail
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2020-11-14 23:48:08 -07:00
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test9_done:
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2020-11-09 20:22:18 -07:00
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test10:
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2020-11-14 23:04:24 -07:00
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addi x30, x0, 10 # x30 = 10
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2020-11-14 23:13:24 -07:00
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# now for some memory stuff
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# sw
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la x9, someint # x9 = start of .bss
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lui x10, 0x12345 # x10 = 0x12345000
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addi x10, x10, 0x678 # x10 = 0x12345678
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nop
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nop
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nop
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nop
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nop
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2021-07-02 03:11:50 -06:00
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lw x11, 0(x9) # x11 = 0xfedcba98 # TODO: do something with this
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2020-11-14 23:13:24 -07:00
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nop
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nop
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nop
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nop
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nop
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sw x10, 0(x9) # someint = 0x12345678
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nop
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nop
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nop
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nop
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nop
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lw x12, 0(x9) # x12 = 0x12345678
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nop
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nop
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nop
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nop
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nop
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2020-11-14 23:48:08 -07:00
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bne x12, x10, fail
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test10_done:
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2020-11-10 00:19:42 -07:00
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2020-11-14 23:36:23 -07:00
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test11:
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addi x30, x0, 11 # x30 = 11
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addi x5, x0, 0 # x5 = 0
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addi x6, x0, 0x10 # x6 = 0x00000010 = 16
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|
test11_loop:
|
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|
|
|
nop
|
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|
nop
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nop
|
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nop
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|
nop
|
2020-11-14 23:48:08 -07:00
|
|
|
sw x10, 0(x9)
|
2020-11-14 23:36:23 -07:00
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|
addi x10, x10, 1 # x10 = x10 + 1
|
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addi x9, x9, 4 # x9 = x9 + 4
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addi x5, x5, 1 # x5 = x5 + 1
|
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|
blt x5, x6, test11_loop
|
|
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|
test11_done:
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|
test12:
|
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|
addi x30, x0, 12
|
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|
|
test12_loop:
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|
# decrement values before load since they were incremented after final store
|
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|
addi x10, x10, -1 # x10 = x10 - 1
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addi x9, x9, -4 # x9 = x9 - 4
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addi x5, x5, -1 # x5 = x5 - 1
|
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|
|
|
nop
|
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|
|
|
nop
|
|
|
|
|
nop
|
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|
|
|
nop
|
|
|
|
|
nop
|
2020-11-14 23:48:08 -07:00
|
|
|
lw x11, 0(x9)
|
2020-11-14 23:36:23 -07:00
|
|
|
bne x11, x10, fail
|
|
|
|
|
bgt x5, x0, test12_loop
|
|
|
|
|
test12_done:
|
|
|
|
|
|
2020-11-14 23:48:08 -07:00
|
|
|
test13:
|
|
|
|
|
addi x30, x0, 13 # x30 = 13
|
|
|
|
|
addi x8, x9, 4
|
|
|
|
|
addi x12, x10, 1
|
|
|
|
|
lw x11, 4(x9)
|
|
|
|
|
bne x11, x12, fail
|
|
|
|
|
addi x8, x9, 8
|
|
|
|
|
addi x12, x10, 2
|
|
|
|
|
lw x11, 8(x9)
|
|
|
|
|
bne x11, x12, fail
|
|
|
|
|
addi x8, x9, 0xc
|
|
|
|
|
addi x12, x10, 3
|
|
|
|
|
lw x11, 0xc(x9)
|
|
|
|
|
bne x11, x12, fail
|
|
|
|
|
addi x8, x9, 0x10
|
|
|
|
|
addi x12, x10, 4
|
|
|
|
|
lw x11, 0x10(x9)
|
|
|
|
|
bne x11, x12, fail
|
|
|
|
|
addi x8, x9, 0x14
|
|
|
|
|
addi x12, x10, 5
|
|
|
|
|
lw x11, 0x14(x9)
|
|
|
|
|
bne x11, x12, fail
|
|
|
|
|
test13_done:
|
|
|
|
|
|
2020-11-10 00:19:42 -07:00
|
|
|
|
|
|
|
|
done:
|
2020-11-14 23:48:08 -07:00
|
|
|
lui x30, 0x10101 # x30 = 0x10101000
|
|
|
|
|
addi x30, x30, 0x010 # x30 = 0x10101010
|
2020-11-09 20:01:25 -07:00
|
|
|
|
|
|
|
|
# set registers to known values before loop
|
|
|
|
|
addi x2, x0, 1 # x1 = 1
|
|
|
|
|
addi x3, x0, 1 # x1 = 1
|
|
|
|
|
addi x4, x0, 1 # x1 = 1
|
|
|
|
|
addi x5, x0, 1 # x1 = 1
|
|
|
|
|
addi x6, x0, 1 # x1 = 1
|
2020-10-16 18:51:51 -06:00
|
|
|
|
2020-10-11 23:03:14 -06:00
|
|
|
# counter and infinite loop
|
2020-10-11 23:36:11 -06:00
|
|
|
addi x31, x0, 1 # x1 = 1
|
2020-09-27 18:04:08 -06:00
|
|
|
|
2020-09-27 18:38:35 -06:00
|
|
|
loop:
|
2020-10-11 23:36:11 -06:00
|
|
|
addi x31, x31, 1 # increment x1
|
2020-11-06 23:18:37 -07:00
|
|
|
jal x1, loop # loop forever
|
|
|
|
|
addi x2, x0, 0 # NOTE: this should never be executed
|
|
|
|
|
addi x3, x0, 0 # NOTE: this should never be executed
|
|
|
|
|
addi x4, x0, 0 # NOTE: this should never be executed
|
|
|
|
|
addi x5, x0, 0 # NOTE: this should never be executed
|
|
|
|
|
addi x6, x0, 0 # NOTE: this should never be executed
|
2020-10-03 13:49:14 -06:00
|
|
|
nop
|
|
|
|
|
nop
|
|
|
|
|
nop
|
|
|
|
|
nop
|
|
|
|
|
nop
|
|
|
|
|
nop
|
2020-09-27 18:38:35 -06:00
|
|
|
|
2020-11-07 00:47:20 -07:00
|
|
|
fail:
|
2020-11-09 20:01:25 -07:00
|
|
|
# set some registers to make it blatantly obvious an error occurred
|
|
|
|
|
addi x1, x0, 0x7ff # x1 = 0x1111
|
|
|
|
|
addi x2, x0, 0x7ff # x1 = 0x1111
|
|
|
|
|
addi x3, x0, 0x7ff # x1 = 0x1111
|
|
|
|
|
addi x4, x0, 0x7ff # x1 = 0x1111
|
|
|
|
|
addi x5, x0, 0x7ff # x1 = 0x1111
|
|
|
|
|
addi x6, x0, 0x7ff # x1 = 0x1111
|
|
|
|
|
addi x7, x0, 0x7ff # x1 = 0x1111
|
|
|
|
|
addi x8, x0, 0x7ff # x1 = 0x1111
|
|
|
|
|
addi x9, x0, 0x7ff # x1 = 0x1111
|
|
|
|
|
j fail # loop forever
|
2020-11-07 00:47:20 -07:00
|
|
|
nop
|
|
|
|
|
nop
|
|
|
|
|
nop
|
|
|
|
|
nop
|
|
|
|
|
nop
|
|
|
|
|
nop
|
|
|
|
|
|
2021-05-03 22:13:11 -06:00
|
|
|
# jalr
|
|
|
|
|
test_jalr:
|
|
|
|
|
addi x2, x0, 0x12 # x2 = 0x12
|
|
|
|
|
jalr x0, x1, 0 # return
|
2021-07-02 03:14:37 -06:00
|
|
|
nop
|
|
|
|
|
nop
|
|
|
|
|
nop
|
|
|
|
|
nop
|
|
|
|
|
nop
|
|
|
|
|
nop
|
2021-05-03 22:13:11 -06:00
|
|
|
|
2020-11-10 00:19:42 -07:00
|
|
|
|
2020-09-27 18:04:08 -06:00
|
|
|
.data
|
2020-11-10 00:19:42 -07:00
|
|
|
someint:
|
|
|
|
|
.word 0xfedcba98
|
2021-07-02 03:20:38 -06:00
|
|
|
someint16:
|
2021-07-02 04:22:33 -06:00
|
|
|
.hword 0x1122
|
2021-07-02 03:20:38 -06:00
|
|
|
someint8:
|
|
|
|
|
.byte 0xaa
|
|
|
|
|
anotherint8:
|
|
|
|
|
.byte 0xbb
|
2020-11-10 00:19:42 -07:00
|
|
|
|
|
|
|
|
.bss
|
|
|
|
|
anotherint:
|
2021-07-02 01:28:23 -06:00
|
|
|
.word
|
