diff options
| -rw-r--r-- | .gitignore | 1 | ||||
| -rw-r--r-- | Makefile | 14 | ||||
| -rw-r--r-- | day01.asm | 72 | ||||
| -rw-r--r-- | input/day01.txt | 1 | ||||
| -rw-r--r-- | sys.asm | 50 |
5 files changed, 138 insertions, 0 deletions
diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..d553987 --- /dev/null +++ b/.gitignore @@ -0,0 +1 @@ +day?? diff --git a/Makefile b/Makefile new file mode 100644 index 0000000..df4adfd --- /dev/null +++ b/Makefile @@ -0,0 +1,14 @@ +BINS = day01 + +all: $(BINS) + +%: %.o + ld -o $@ $< + +%.o: %.asm sys.asm + nasm -f elf64 -o $@ $< + +clean: + rm -f $(BINS) + +.PHONY: clean diff --git a/day01.asm b/day01.asm new file mode 100644 index 0000000..725c9b2 --- /dev/null +++ b/day01.asm @@ -0,0 +1,72 @@ +%include "sys.asm" +global _start + +section .bss +input: resb 1 + +section .data +position: + .x: dd 0 + .y: dd 0 +direction: + .x: dd 0 + .y: dd -1 + +section .text +_start: + .loopTurn: + syscall SYS_READ, FD_STDIN, input, 1 + test rax, rax + jz .breakTurn + + cmp byte [input], 'R' + jne .elseLeft + .thenRight: + rol qword [direction], 32 + neg dword [direction.x] + jmp .endLeft + .elseLeft: + neg dword [direction.x] + rol qword [direction], 32 + .endLeft: + + xor r12, r12 + .loopDigit: + syscall SYS_READ, FD_STDIN, input, 1 + test rax, rax + jz .breakDigit + movzx rax, byte [input] + + cmp al, ',' + je .breakDigit + + shl r12, 1 + lea r12, [r12 + r12 * 4 - '0'] + add r12, rax + jmp .loopDigit + .breakDigit: + + syscall SYS_READ, FD_STDIN, input, 1 + + mov eax, r12d + imul eax, [direction.x] + add [position.x], eax + imul r12d, [direction.y] + add [position.y], r12d + jmp .loopTurn + .breakTurn: + + mov eax, [position.x] + sar eax, 31 + mov ecx, eax + xor ecx, [position.x] + sub ecx, eax + + mov eax, [position.y] + sar eax, 31 + mov edx, eax + xor edx, [position.y] + sub edx, eax + + add ecx, edx +syscall SYS_EXIT, rcx diff --git a/input/day01.txt b/input/day01.txt new file mode 100644 index 0000000..c08616b --- /dev/null +++ b/input/day01.txt @@ -0,0 +1 @@ +R2, L5, L4, L5, R4, R1, L4, R5, R3, R1, L1, L1, R4, L4, L1, R4, L4, R4, L3, R5, R4, R1, R3, L1, L1, R1, L2, R5, L4, L3, R1, L2, L2, R192, L3, R5, R48, R5, L2, R76, R4, R2, R1, L1, L5, L1, R185, L5, L1, R5, L4, R1, R3, L4, L3, R1, L5, R4, L4, R4, R5, L3, L1, L2, L4, L3, L4, R2, R2, L3, L5, R2, R5, L1, R1, L3, L5, L3, R4, L4, R3, L1, R5, L3, R2, R4, R2, L1, R3, L1, L3, L5, R4, R5, R2, R2, L5, L3, L1, L1, L5, L2, L3, R3, R3, L3, L4, L5, R2, L1, R1, R3, R4, L2, R1, L1, R3, R3, L4, L2, R5, R5, L1, R4, L5, L5, R1, L5, R4, R2, L1, L4, R1, L1, L1, L5, R3, R4, L2, R1, R2, R1, R1, R3, L5, R1, R4 \ No newline at end of file diff --git a/sys.asm b/sys.asm new file mode 100644 index 0000000..a7d5295 --- /dev/null +++ b/sys.asm @@ -0,0 +1,50 @@ +%macro syscall 0 + syscall +%endmacro + +%macro syscall 1 + mov rax, %1 + syscall +%endmacro + +%macro syscall 2 + mov rdi, %2 + syscall %1 +%endmacro + +%macro syscall 3 + mov rsi, %3 + syscall %1, %2 +%endmacro + +%macro syscall 4 + mov rdx, %4 + syscall %1, %2, %3 +%endmacro + +%macro syscall 5 + mov r10, %5 + syscall %1, %2, %3, %4 +%endmacro + +%macro syscall 6 + mov r8, %6 + syscall %1, %2, %3, %4, %5 +%endmacro + +%macro syscall 7 + mov r9, %7 + syscall %1, %2, %3, %4, %5, %6 +%endmacro + +SYS_READ equ 0 +SYS_WRITE equ 1 +SYS_GETPID equ 39 +SYS_EXIT equ 60 +SYS_KILL equ 62 + +FD_STDIN equ 0 +FD_STDOUT equ 1 +FD_STDERR equ 2 + +SIG_ABRT equ 6 |