git.y1.nz

commit 766b0415d246c8ac932731166f26f7eeca49a2b7
parent 1132a2f21d49c758d17327cce5793ff05c6c314a
Author: Toxa <untoxa@mail.ru>
Date:   Fri, 24 May 2024 01:27:47 +0300

Z80 library: return correct result from memcpy()

Diffstat:
M
gbdk-lib/libc/asm/z80/memcpy.s
12
+++++++-----

1 file changed, 7 insertions(+), 5 deletions(-)
diff --git a/gbdk-lib/libc/asm/z80/memcpy.s b/gbdk-lib/libc/asm/z80/memcpy.s
@@ -14,11 +14,12 @@ ___memcpy:
     push af
     ld a, b
     or c
-    ret z    
-    ld a, c    
-    and #7
+    ret z
+    push de
+    ld a, c
+    and #15
     add a
-    sub #16
+    sub #32
     neg
     ld iy, #1$
     add iyl
@@ -29,8 +30,9 @@ ___memcpy:
     xor a
     jp (iy)
 1$:
-    .rept 8
+    .rept 16
         ldi
     .endm
     jp pe, 1$
+    pop de
     ret

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