1 files changed, 77 insertions, 0 deletions
diff --git a/arm7/asm/SND_lfo.s b/arm7/asm/SND_lfo.s
new file mode 100644
index 00000000..cca10305
--- /dev/null
+++ b/arm7/asm/SND_lfo.s
@@ -0,0 +1,77 @@
+	.include "asm/macros.inc"
+	.include "global.inc"
+
+    .text
+
+	arm_func_start SND_GetLfoValue
+SND_GetLfoValue: ; 0x037FC7F4
+	stmdb	sp!, {r4, lr}
+	mov	r4, r0
+	ldrb	r0, [r4, #2]
+	cmp	r0, #0
+	moveq	r0, #0
+	beq	_037FC83C
+	ldrh	r1, [r4, #6]
+	ldrh	r0, [r4, #4]
+	cmp	r1, r0
+	movcc	r0, #0
+	bcc	_037FC83C
+	ldrh	r0, [r4, #8]
+	mov	r0, r0, lsr #8
+	bl	SND_SinIdx
+	ldrb	r2, [r4, #3]
+	ldrb	r1, [r4, #2]
+	mul	r0, r1, r0
+	mul	r0, r2, r0
+_037FC83C:
+	ldmia	sp!, {r4, lr}
+	bx	lr
+
+	arm_func_start SND_UpdateLfo
+SND_UpdateLfo: ; 0x037FC844
+	ldrh	r2, [r0, #6]
+	ldrh	r1, [r0, #4]
+	cmp	r2, r1
+	addcc	r1, r2, #1
+	strcch	r1, [r0, #6]
+	bxcc	lr
+	ldrh	r2, [r0, #8]
+	ldrb	r1, [r0, #1]
+	mov	r3, r1, lsl #6
+	add	r1, r2, r1, lsl #6
+	mov	r2, r1, lsr #8
+	b	_037FC878
+_037FC874:
+	sub	r2, r2, #128	; 0x80
+_037FC878:
+	cmp	r2, #128	; 0x80
+	bcs	_037FC874
+	ldrh	r1, [r0, #8]
+	add	r1, r1, r3
+	strh	r1, [r0, #8]
+	ldrh	r1, [r0, #8]
+	and	r1, r1, #255	; 0xff
+	strh	r1, [r0, #8]
+	ldrh	r1, [r0, #8]
+	orr	r1, r1, r2, lsl #8
+	strh	r1, [r0, #8]
+	bx	lr
+
+	arm_func_start SND_StartLfo
+SND_StartLfo: ; 0x037FC8A8
+	mov	r1, #0
+	strh	r1, [r0, #8]
+	strh	r1, [r0, #6]
+	bx	lr
+
+	arm_func_start SND_InitLfoParam
+SND_InitLfoParam: ; 0x037FC8B8
+	mov	r2, #0
+	strb	r2, [r0]
+	strb	r2, [r0, #2]
+	mov	r1, #1
+	strb	r1, [r0, #3]
+	mov	r1, #16
+	strb	r1, [r0, #1]
+	strh	r2, [r0, #4]
+	bx	lr