Fix issue with small, misaligned copies

2025-01-11 09:31:34 +11:00 · 2022-06-19 13:03:44 +01:00 · 2022-06-19 13:03:44 +01:00 · c9f1401ef3
parent a7d52bbed0
commit c9f1401ef3
1 changed files with 4 additions and 0 deletions
--- a/agb/src/agbabi/memcpy.s
+++ b/agb/src/agbabi/memcpy.s
@ -29,6 +29,10 @@ __aeabi_memcpy:
    bmi     .Lcopy1
    bcs     .Lcopy2

+    // If the number of bytes to copy is less than 4, we should just copy one byte at a time
+    cmp     r2, #4
+    bmi     .Lcopy1
+
 .Lcopy4:
    // Copy half and byte head
    rsb     r3, r0, #4