* src/z80/gen.c (genArrayInit): Made it work for on stack arrays.

[fw/sdcc] / device / lib / gbz80 / crt0_rle.s

diff --git a/device/lib/gbz80/crt0_rle.s b/device/lib/gbz80/crt0_rle.s
new file mode 100644 (file)
index 0000000..d577814
--- /dev/null
+++ b/device/lib/gbz80/crt0_rle.s
@@ -0,0 +1,45 @@
+        .area   _CODE
+        
+        ;; Special RLE decoder used for initing global data
+__initrleblock::
+        ;; Pull the destination address out
+        ld      c,l
+        ld      b,h
+        
+        ;; Pop the return address
+        pop     hl
+1$:
+        ;; Fetch the run
+        ld      e,(hl)
+        inc     hl
+        ;; Negative means a run
+        bit     7,e
+        jp      z,2$
+        ;; Code for expanding a run
+        ld      a,(hl)
+        inc     hl
+3$:
+        ld      (bc),a
+        inc     bc
+        inc     e
+        jp      nz,3$
+        jp      1$
+2$:
+        ;; Zero means end of a block
+        xor     a
+        or      e
+        jp      z,4$
+        ;; Code for expanding a block
+5$:     
+        ld      a,(hl)        
+        inc     hl
+        ld      (bc),a
+        inc     bc
+        dec     e
+        jp      nz,5$
+        jp      1$
+4$:     
+        ;; Push the return address back onto the stack
+        push    hl
+        ret
+