1 files changed, 36 insertions, 0 deletions
diff --git a/ax/source/algo/cp8.s b/ax/source/algo/cp8.s
new file mode 100644
index 0000000..94456ba
--- /dev/null
+++ b/ax/source/algo/cp8.s
@@ -0,0 +1,36 @@
+@ Copyright 2022 Gabriel Jensen.
+@ This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.
+@ If a copy of the MPL was not distributed with this file, You can obtain one at <https://mozilla.org/MPL/2.0>.
+
+.syntax unified
+
+.cpu arm7tdmi
+.thumb
+
+.globl ax_cp8
+
+.func
+.thumb_func
+
+ax_cp8:
+	             @ ax_i8 tmp;
+	adds r1,r0   @ void * end = in + num;
+.cp:             @ cp:;
+	@ Check if we have any bytes remaining:
+	cmp r0,r1
+	beq .done    @ if (num == end) goto done;
+
+	@ Copy one byte:
+	ldrb r3,[r0] @ tmp = *(ax_i8 *)in;
+	strb r3,[r2] @ *(ax_i8 *)out = tmp;
+
+	@ Continue to the next byte:
+	adds r0,0x1 @ ++in;
+	adds r2,0x1 @ ++out;
+	b .cp       @ goto cp;
+
+.done:          @ done:;
+	@ Return:
+	bx lr       @ return;
+	
+.endfunc