# NOTE: .text .data .bss must occur in that order .global _start .text _start: # lui lui x1, 0xfedcb # x1 = 0xfedcb000 # addi addi x1, fx1, 0x789 # x1 = 0xfedcb789 addi x2, x0, -1 # x2 = 0xffffffff addi x3, x1, -0x777 # x3 = 0xfedcb012 # add add x4, x1, x2 # x4 = 0xfedcb788 # sub sub x5, x1, x3 # x5 = 0x00000777 # and and x6, x1, x2 # x6 = 0xfedcb789 and x7, x1, x0 # x7 = 0x00000000 and x8, x4, x3 # x8 = 0xfedcb000 # or or x9, x1, x2 # x9 = 0xffffffff or x10, x1, x0 # x10 = 0xfedcb789 or x11, x4, x3 # x11 = 0xfedcb79a # xor xor x12, x1, x2 # x12 = 0x01234876 xor x13, x1, x1 # x13 = 0x00000000 xor x14, x0, x2 # x14 = 0xffffffff # andi andi x15, x2, -1348 # x15 = 0xfffffabc -1348 = 0xfffffabc andi x16, x2, 0x123 # x16 = 0x00000123 andi x17, x1, -1645 # x17 = 0xfedcb181 -1645 = 0xfffff993 # ori ori x18, x2, 0x000 # x18 = 0xffffffff ori x19, x0, 0x768 # x19 = 0x768 ori x20, x1, 0x7ff # x20 = 0xfedcb7ff # xori xori x21, x2, 0x123 # x21 = 0xfffffedc xori x22, x1, 0x788 # x22 = 0xfedcb001 xori x23, x0, 0x788 # x23 = 0x00000788 # slli slli x24, x23, 4 # x24 = 0x00007880 slli x25, x2, 1 # x25 = 0xfffffffe slli x26, x2, 63 # x26 = 0x80000000 # NOTE: gcc should not allow this since shamt is only 5 bits. discarding high bit so 63 = 31 slli x27, x2, 31 # x27 = 0x80000000 # srli srli x28, x23, 4 # x28 = 0x00000078 srli x29, x2, 1 # x29 = 0x7fffffff srli x30, x2, 63 # x30 = 0x00000001 # NOTE: gcc should not allow this since shamt is only 5 bits. discarding high bit so 63 = 31 srli x3, x2, 31 # x3 = 0x00000001 # srai srai x4, x23, 4 # x4 = 0x00000078 srai x5, x2, 1 # x5 = 0xffffffff srai x6, x2, 63 # x6 = 0xffffffff # NOTE: gcc should not allow this since shamt is only 5 bits. discarding high bit so 63 = 31 srai x7, x2, 31 # x7 = 0xffffffff # sll addi x8, x0, 4 # x8 = 0x00000004 addi x9, x0, 1 # x9 = 0x00000001 addi x10, x0, 63 # x10 = 0x0000003f addi x11, x0, 31 # x11 = 0x0000001f sll x12, x23, x8 # x12 = 0x00007880 # 4 sll x13, x2, x9 # x13 = 0xfffffffe # 1 sll x14, x2, x10 # x14 = 0x80000000 # 63 = 31 sll x15, x2, x11 # x15 = 0x80000000 # 31 sll x16, x1, x0 # x16 = 0xfedcb789 # 0 sll x17, x1, x2 # x17 = 0x80000000 # -1=31 # srl srl x18, x23, x8 # x18 = 0x00000078 # 4 srl x19, x2, x9 # x17 = 0x7fffffff # 1 srl x20, x2, x10 # x20 = 0x00000001 # 63 = 31 srl x21, x2, x11 # x21 = 0x00000001 # 31 srl x22, x1, x0 # x22 = 0xfedcb789 # 0 srl x24, x1, x2 # x24 = 0x00000001 # -1=31 # sra sra x25, x23, x8 # x25 = 0x00000078 # 4 sra x26, x2, x9 # x26 = 0xffffffff # 1 sra x27, x2, x10 # x27 = 0xffffffff # 63 = 31 sra x28, x2, x11 # x28 = 0xffffffff # 31 sra x29, x1, x0 # x29 = 0xfedcb789 # 0 sra x30, x1, x2 # x30 = 0xffffffff # -1=31 # slti addi x3, x0, 1 # x3 = 0x00000001 addi x4, x0, 0x010 # x4 = 0x00000010 addi x5, x0, 0x100 # x5 = 0x00000100 sub x6, x0, x3 # x6 = 0xffffffff sub x7, x0, x4 # x7 = 0xfffffff0 sub x8, x0, x5 # x8 = 0xffffff00 slti x9, x3, 0 # x9 = 0x00000000 slti x10, x3, 1 # x10 = 0x00000000 slti x11, x3, 2 # x11 = 0x00000001 slti x12, x3, -1 # x12 = 0x00000000 slti x13, x7, 0 # x13 = 0x00000001 slti x14, x7, -17 # x14 = 0x00000000 # sltiu sltiu x15, x3, 0 # x15 = 0x00000000 sltiu x16, x3, 1 # x16 = 0x00000000 sltiu x17, x3, 2 # x17 = 0x00000001 sltiu x18, x3, -1 # x18 = 0x00000001 # -1=0xffffffff sltiu x19, x7, 0 # x19 = 0x00000000 sltiu x20, x7, -15 # x20 = 0x00000001 # -15=0xfffffff1 # slt slt x21, x0, x3 # x21 = 0x00000001 slt x22, x3, x0 # x22 = 0x00000000 slt x23, x3, x3 # x23 = 0x00000000 slt x24, x3, x6 # x24 = 0x00000000 slt x25, x6, x3 # x25 = 0x00000001 # sltu sltu x26, x0, x3 # x26 = 0x00000001 sltu x27, x3, x0 # x27 = 0x00000000 sltu x28, x3, x3 # x28 = 0x00000000 sltu x29, x3, x6 # x29 = 0x00000001 sltu x30, x6, x3 # x30 = 0x00000000 # auipc auipc x3, 0 # x3 = pc + 0 auipc x4, 3 # x4 = pc + 0x3000 auipc x5, 0xfffff # x5 = pc + 0xfffff000 # TODO: verify auipc adds and does not concatenate (must have PC>0xfff to test this) # jal jal x1, test_jalr test1: # beq addi x30, x0, 1 # x30 = 1 addi x9, x8, 0 # x9 = 0xffffff00 bne x0, x0, fail # 0 == 0 bne x9, x8, fail # x9 == x8 bne x7, x8, test1_done # x7 != x8 j fail test1_done: test2: # beq addi x30, x0, 2 # x30 = 2 beq x0, x8, fail # 0 != x8 beq x7, x8, fail # x7 != x8 beq x8, x9, test2_done # x8 == x9 j fail test2_done: test3: # blt addi x30, x0, 3 # x30 = 3 blt x8, x9, fail # x8 == x9 blt x7, x8, fail # x7 > x8 blt x30, x8, fail # x30 > x8 blt x8, x7, test3_done # x8 < x7 j fail test3_done: test4: # bltu addi x30, x0, 4 # x30 = 4 bltu x8, x9, fail # x8 == x9 bltu x7, x8, fail # x7 > x8 bltu x30, x8, test4_done # x30 < x8 unsigned j fail test4_done: test5: addi x30, x0, 5 # x30 = 5 bltu x8, x7, test5_done # x8 < x7 j fail test5_done: test6: # bne addi x30, x0, 6 # x30 = 6 bne x0, x0, fail # 0 == 0 bne x8, x9, fail # 0 == 0 bne x8, x0, test6_done # x8 != 0 j fail test6_done: test7: # bge addi x30, x0, 7 # x30 = 7 bge x8, x7, fail # x8 < x7 bge x7, x7, test7_done # x7 == x7 j fail test7_done: test8: addi x30, x0, 8 # x30 = 8 bge x8, x0, fail # x8 < 0 bge x7, x8, test8_done # x7 > x8 j fail test8_done: test9: # bgeu addi x30, x0, 9 # x30 = 9 bgeu x8, x7, fail # x8 < x7 bgeu x0, x8, fail # 0 < x8 unsigned bgeu x8, x0, test9_done # x8 > 0 unsigned j fail test9_done: test10: addi x30, x0, 10 # x30 = 10 # now for some memory stuff # sw la x9, someint # x9 = start of .bss lui x10, 0x12345 # x10 = 0x12345000 addi x10, x10, 0x678 # x10 = 0x12345678 nop nop nop nop nop lw x11, 0(x9) # x11 = 0xfedcba98 nop nop nop nop nop sw x10, 0(x9) # someint = 0x12345678 nop nop nop nop nop lw x12, 0(x9) # x12 = 0x12345678 nop nop nop nop nop bne x12, x10, fail test10_done: test11: addi x30, x0, 11 # x30 = 11 addi x5, x0, 0 # x5 = 0 addi x6, x0, 0x10 # x6 = 0x00000010 = 16 test11_loop: nop nop nop nop nop sw x10, 0(x9) addi x10, x10, 1 # x10 = x10 + 1 addi x9, x9, 4 # x9 = x9 + 4 addi x5, x5, 1 # x5 = x5 + 1 blt x5, x6, test11_loop test11_done: test12: addi x30, x0, 12 test12_loop: # decrement values before load since they were incremented after final store addi x10, x10, -1 # x10 = x10 - 1 addi x9, x9, -4 # x9 = x9 - 4 addi x5, x5, -1 # x5 = x5 - 1 nop nop nop nop nop lw x11, 0(x9) bne x11, x10, fail bgt x5, x0, test12_loop test12_done: 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: done: lui x30, 0x10101 # x30 = 0x10101000 addi x30, x30, 0x010 # x30 = 0x10101010 # 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 # counter and infinite loop addi x31, x0, 1 # x1 = 1 loop: addi x31, x31, 1 # increment x1 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 nop nop nop nop nop nop fail: # 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 nop nop nop nop nop nop # jalr test_jalr: addi x2, x0, 0x12 # x2 = 0x12 jalr x0, x1, 0 # return .data someint: .word 0xfedcba98 .bss anotherint: .word