git.y1.nz

commit b0a36f5bcda48961b6b27b33293b838fafac8b47
parent 5ed2d59d71eb448ebac62127f39f73561b6a2865
Author: Toxa <untoxa@mail.ru>
Date:   Thu, 14 Mar 2024 19:23:35 +0300

SMS/GG: optimize native tile data loading routines

Diffstat:
M
gbdk-lib/include/sms/sms.h
18
+++++-------------
M
gbdk-lib/libc/targets/z80/sms_set_native_data.s
34
++++++++++++++++++++++------------

2 files changed, 27 insertions(+), 25 deletions(-)
diff --git a/gbdk-lib/include/sms/sms.h b/gbdk-lib/include/sms/sms.h
@@ -561,20 +561,12 @@ void set_palette(uint8_t first_palette, uint8_t nb_palettes, const palette_color
 #define set_bkg_palette set_palette
 #define set_sprite_palette(first_palette,nb_palettes,rgb_data) set_palette(1,1,rgb_data)
 
-void set_native_tile_data(uint16_t start, uint16_t ntiles, const void *src) Z88DK_CALLEE PRESERVES_REGS(iyh, iyl);
-inline void set_bkg_4bpp_data(uint16_t start, uint16_t ntiles, const void *src) {
-    set_native_tile_data(start, ntiles, src);
-}
-inline void set_bkg_native_data(uint8_t first_tile, uint8_t nb_tiles, const uint8_t *data) {
-    set_bkg_4bpp_data(first_tile, nb_tiles, data);
-}
+void set_native_tile_data(uint16_t start, uint16_t ntiles, const void *src) PRESERVES_REGS(iyh, iyl);
+void set_bkg_4bpp_data(uint16_t start, uint16_t ntiles, const void *src) PRESERVES_REGS(iyh, iyl);
+void set_bkg_native_data(uint16_t start, uint16_t ntiles, const void *src) PRESERVES_REGS(iyh, iyl);
 
-inline void set_sprite_4bpp_data(uint16_t start, uint16_t ntiles, const void *src) {
-    set_native_tile_data((uint8_t)(start) + 0x100u, ntiles, src);
-}
-inline void set_sprite_native_data(uint8_t first_tile, uint8_t nb_tiles, const uint8_t *data) {
-    set_sprite_4bpp_data(first_tile, nb_tiles, data);
-}
+void set_sprite_4bpp_data(uint8_t start, uint16_t ntiles, const void *src) PRESERVES_REGS(iyh, iyl);
+void set_sprite_native_data(uint8_t start, uint16_t ntiles, const void *src) PRESERVES_REGS(iyh, iyl);
 
 #define COMPAT_PALETTE(C0,C1,C2,C3) (((uint16_t)(C3) << 12) | ((uint16_t)(C2) << 8) | ((uint16_t)(C1) << 4) | (uint16_t)(C0))
 extern uint16_t _current_2bpp_palette;
diff --git a/gbdk-lib/libc/targets/z80/sms_set_native_data.s b/gbdk-lib/libc/targets/z80/sms_set_native_data.s
@@ -4,12 +4,26 @@
         .module VRAMUtils
         .area   _HOME
 
-; void set_native_tile_data(uint16_t start, uint16_t ntiles, const void *src) __z88dk_callee __preserves_regs(iyh,iyl);
+; void set_sprite_4bpp_data(uint8_t start, uint16_t ntiles, const void *src) __preserves_regs(iyh,iyl);
+_set_sprite_4bpp_data::
+; void set_sprite_native_data(uint8_t start, uint16_t ntiles, const void *src) __preserves_regs(iyh,iyl);
+_set_sprite_native_data::
+	ld h, #1
+        ld l, a
+
+; void set_bkg_native_data(uint16_t start, uint16_t ntiles, const void *src) __preserves_regs(iyh,iyl);
+_set_bkg_native_data::
+; void set_bkg_4bpp_data(uint16_t start, uint16_t ntiles, const void *src) __preserves_regs(iyh,iyl);
+_set_bkg_4bpp_data::
+; void set_native_tile_data(uint16_t start, uint16_t ntiles, const void *src) __preserves_regs(iyh,iyl);
 _set_native_tile_data::
+        ld b, h
+        ld c, l
+
         DISABLE_VBLANK_COPY        ; switch OFF copy shadow SAT
 
-        pop de          ; pop ret address
-        pop hl
+        ld h, b
+        ld l, c
 
         add hl, hl
         add hl, hl
@@ -22,13 +36,9 @@ _set_native_tile_data::
 
         VDP_WRITE_CMD h, l
 
-        pop bc
         pop hl
-        push de
+        ex (sp), hl
 
-        ld e, c
-        ld d, b
-        
         ld c, #.VDP_DATA
         inc d
         inc e
@@ -36,16 +46,16 @@ _set_native_tile_data::
 
 1$:
         ld b, #32
-3$:        
+3$:
         outi
         jr nz, 3$
 2$:
         dec e
-        jr  nz, 1$
+        jp  nz, 1$
 
         dec d
-        jr nz, 1$
-        
+        jp nz, 1$
+
         ENABLE_VBLANK_COPY         ; switch ON copy shadow SAT
 
         ret

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