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src/CLI/Runtime/entry.s

@@ -0,0 +1,12 @@
+.intel_syntax noprefix
+.extern main
+.section .text
+
+.global _start
+_start:
+    mov rdi, rsp
+    # func main(args: []^string): i64
+    call main
+    mov rdi, rax
+    mov rax, 60
+    syscall

src/CLI/Runtime/nub_memcpy.s

@@ -0,0 +1,20 @@
+.intel_syntax noprefix
+.section .text
+
+# func nub_memcpy(destination: ^u8, source: ^u8, count: u64): ^u8
+.global nub_memcpy
+nub_memcpy:
+    push rdi
+    mov rcx, rdx
+    test rcx, rcx
+    jz memcpy_done
+memcpy_loop:
+    mov al, BYTE PTR [rsi]
+    mov BYTE PTR [rdi], al
+    inc rsi
+    inc rdi
+    dec rcx
+    jnz memcpy_loop
+memcpy_done:
+    pop rax
+    ret

src/CLI/Runtime/nub_memset.s

@@ -0,0 +1,19 @@
+.intel_syntax noprefix
+.section .text
+
+# func nub_memset(destination: ^u8, value: i8, count: u64): ^u8
+.global nub_memset
+nub_memset:
+    push rdi
+    mov rcx, rdx
+    mov al, sil
+    test rcx, rcx
+    jz memset_done
+memset_loop:
+    mov BYTE PTR [rdi], al
+    inc rdi
+    dec rcx
+    jnz memset_loop
+memset_done:
+    pop rax
+    ret

src/CLI/Runtime/nub_panic.s

@@ -0,0 +1,14 @@
+.intel_syntax noprefix
+.section .text
+
+# func nub_panic(message: ^u8, message_length: u64): void
+.global nub_panic
+nub_panic:
+    mov rdx, rsi
+    mov rsi, rdi
+    mov rax, 1
+    mov rdi, 2
+    syscall
+    mov rax, 60
+    mov rdi, 101
+    syscall

src/CLI/Runtime/nub_strcmp.s

@@ -0,0 +1,22 @@
+.intel_syntax noprefix
+.section .text
+
+# func nub_strcmp(lhs: ^u8, rhs: ^u8): bool
+.global nub_strcmp
+nub_strcmp:
+    xor rdx, rdx
+strcmp_loop:
+    mov al, BYTE PTR [rsi + rdx]
+    mov bl, BYTE PTR [rdi + rdx]
+    inc rdx
+    cmp al, bl
+    jne strcmp_not_equal
+    cmp al, 0
+    je strcmp_equal
+    jmp strcmp_loop
+strcmp_not_equal:
+    mov rax, 0
+    ret
+strcmp_equal:
+    mov rax, 1
+    ret