1 files changed, 94 insertions, 0 deletions
diff --git a/arm9/asm/libstd.s b/arm9/asm/libstd.s
new file mode 100644
index 00000000..39946c46
--- /dev/null
+++ b/arm9/asm/libstd.s
@@ -0,0 +1,94 @@
+		.include "asm/macros.inc"
+		.include "global.inc"
+
+	.text
+
+	arm_func_start STD_CompareNString
+STD_CompareNString: ; 0x020DE03C
+	stmdb sp!, {lr}
+	sub sp, sp, #0x4
+	cmp r2, #0x0
+	beq _020DE080
+	cmp r2, #0x0
+	mov lr, #0x0
+	ble _020DE080
+_020DE058:
+	ldrb r12, [r0, lr]
+	ldrb r3, [r1, lr]
+	cmp r12, r3
+	addne sp, sp, #0x4
+	subne r0, r12, r3
+	ldmneia sp!, {lr}
+	bxne lr
+	add lr, lr, #0x1
+	cmp lr, r2
+	blt _020DE058
+_020DE080:
+	mov r0, #0x0
+	add sp, sp, #0x4
+	ldmia sp!, {lr}
+	bx lr
+
+	arm_func_start STD_CompareString
+STD_CompareString: ; 0x020DE090
+	b _020DE09C
+_020DE094:
+	add r0, r0, #0x1
+	add r1, r1, #0x1
+_020DE09C:
+	ldrsb r2, [r1, #0x0]
+	ldrsb r3, [r0, #0x0]
+	cmp r3, r2
+	bne _020DE0B4
+	cmp r3, #0x0
+	bne _020DE094
+_020DE0B4:
+	sub r0, r3, r2
+	bx lr
+
+	arm_func_start STD_GetStringLength
+STD_GetStringLength: ; 0x020DE0BC
+	ldrsb r1, [r0, #0x0]
+	mov r2, #0x0
+	cmp r1, #0x0
+	beq _020DE0DC
+_020DE0CC:
+	add r2, r2, #0x1
+	ldrsb r1, [r0, r2]
+	cmp r1, #0x0
+	bne _020DE0CC
+_020DE0DC:
+	mov r0, r2
+	bx lr
+
+	arm_func_start STD_CopyLString
+STD_CopyLString: ; 0x020DE0E4
+	stmdb sp!, {lr}
+	sub sp, sp, #0x4
+	sub r12, r2, #0x1
+	cmp r12, #0x0
+	mov lr, #0x0
+	ble _020DE120
+_020DE0FC:
+	ldrsb r3, [r1, #0x0]
+	strb r3, [r0, lr]
+	ldrsb r3, [r1, #0x0]
+	cmp r3, #0x0
+	beq _020DE120
+	add lr, lr, #0x1
+	cmp lr, r12
+	add r1, r1, #0x1
+	blt _020DE0FC
+_020DE120:
+	sub r3, r2, #0x1
+	cmp lr, r3
+	blt _020DE138
+	cmp r2, #0x0
+	movne r2, #0x0
+	strneb r2, [r0, lr]
+_020DE138:
+	mov r0, r1
+	bl STD_GetStringLength
+	add sp, sp, #0x4
+	ldmia sp!, {lr}
+	bx lr