1 files changed, 35 insertions, 0 deletions
diff --git a/Tremolo/floor1LARM.s b/Tremolo/floor1LARM.s
new file mode 100644
index 0000000..6b719a1
--- /dev/null
+++ b/Tremolo/floor1LARM.s
@@ -0,0 +1,35 @@
+@ Tremolo library
+@ Copyright (C) 2009 Robin Watts for Pinknoise Productions Ltd
+
+    .text
+
+	.global	render_lineARM
+
+render_lineARM:
+	@ r0 = n
+	@ r1 = d
+	@ r2 = floor
+	@ r3 = base
+	@ <> = err
+	@ <> = adx
+	@ <> = ady
+	MOV	r12,r13
+	STMFD	r13!,{r4-r6,r11,r14}
+	LDMFD	r12,{r11,r12,r14}	@ r11 = err
+					@ r12 = adx
+					@ r14 = ady
+rl_loop:
+	LDR	r4, [r1]		@ r4 = *d
+	LDR	r5, [r2], r3,LSL #2	@ r5 = *floor    r2 = floor+base
+	SUBS	r11,r11,r14		@ err -= ady
+	MOV	r4, r4, ASR #6
+	MUL	r5, r4, r5		@ r5 = MULT31_SHIFT15
+	ADDLT	r11,r11,r12		@ if (err < 0) err+=adx
+	ADDLT	r2, r2, #4		@              floor+=1
+	SUBS	r0, r0, #1
+	STR	r5, [r1], #4
+	BGT	rl_loop
+
+	LDMFD	r13!,{r4-r6,r11,PC}
+
+	@ END