/*
 Templates for

 DrawTile16
 DrawClippedTile16
*/

#include "snes9x.h"
#include "memmap.h"
#include "ppu.h"
#include "display.h"
#include "gfx.h"
#include "tile16.h"

#define MACRO_CONCAT(a,b) a##b
#define DEC_DRAW(n) MACRO_CONCAT(void DrawTile16, n)(uint32 Tile, uint32 Offset, uint32 StartLine, uint32 LineCount)
#define DEC_DRAWCLIPPED(n) MACRO_CONCAT(void DrawClippedTile16, n)(uint32 Tile, uint32 Offset, uint32 StartPixel, uint32 Width,	uint32 StartLine, uint32 LineCount)

#ifdef __FAST_OBJS__

#define DEC_DRAWNOZ(n) MACRO_CONCAT(void DrawNoZTile16, n)(uint32 Tile, uint32 Offset, uint32 StartLine, uint32 LineCount)

#define ROW(width) \
			"	mov	r10, " width "			\n" \
			"7:\n" \
			"	ldrb	r9, [%[bp]], #1			\n"\
			"	add	%[depth], %[depth], #1		\n"\
			"	movs	r9, r9, lsl #2			\n"\
			"	beq	3f				\n"\
										\
			"	ldrb	r8, [%[subdepth], %[depth]]	\n"\
			"	ldr	r9, [%[colors], r9]		\n"\
			"	strb	%[gfx_z2], [%[depth], #(-1)]	\n"\
										\
			"	cmp	r8, #1				\n"\
			"	blo	4f				\n"\
			"	ldrneh	r8, [%[screen], %[delta]]	\n"\
			"	moveq	r8, %[fixedcolour]		\n"\
			ROP \
			"4:						\n"\
			"	strh	r9, [%[screen]] 	\n"\
										\
			"3:						\n"\
			"	subs	r10, r10, #1			\n"\
			"	add	%[screen], %[screen], #2	\n"\
			"	bne	7b				\n"

#define ROW1(width)	\
			"	mov	r10, " width "			\n" \
			"7:\n" \
			"	ldrb	r9, [%[bp]], #-1		\n"\
			"	add	%[depth], %[depth], #1		\n"\
			"	movs	r9, r9, lsl #2			\n"\
			"	beq	3f				\n"\
										\
			"	ldrb	r8, [%[subdepth], %[depth]]	\n"\
			"	ldr	r9, [%[colors], r9]		\n"\
			"	strb	%[gfx_z2], [%[depth], #(-1)]	\n"\
										\
			"	cmp	r8, #1				\n"\
			"	blo	4f				\n"\
			"	ldrneh	r8, [%[screen], %[delta]]	\n"\
			"	moveq	r8, %[fixedcolour]		\n"\
			ROP \
			"4:						\n"\
			"	strh	r9, [%[screen]]		 	\n"\
										\
			"3:						\n"\
			"	subs	r10, r10, #1			\n"\
			"	add	%[screen], %[screen], #2	\n"\
			"	bne	7b				\n"




// DrawNoZTile16 -----------------------------------------
DEC_DRAWNOZ(ROPNAME)
{
     TILE_PREAMBLE 

  if (Tile & V_FLIP){
    if (!(Tile & H_FLIP)){
		__asm__ volatile (
		"2:					\n"

		ROW("#8")

		"	sub	%[bp], %[bp], #(8+8)		\n"	
		"	add	%[screen], %[screen], #(640-16)	\n" 
		"	add	%[depth], %[depth], #(320-8)	\n"
		"	subs 	%[lcount], %[lcount], #1	\n"
		"	bne	2b"
		// output
		: [lcount] "+r" (LineCount)
		// input
		: [gfx_z1] "r" (GFX.Z1),
		  [gfx_z2] "r" (GFX.Z2),
		  [colors] "r" (GFX.ScreenColors),
		  [delta] "r" (GFX.Delta << 1),
		  [fixedcolour] "r" (GFX.FixedColour),
		  [screen] "r" ((uint16 *) GFX.S + Offset),
		  [depth] "r" (GFX.ZBuffer + Offset),
		  [subdepth] "r" (GFX.DepthDelta - 1),
 		  [bp] "r" (pCache + 56 - StartLine)
		// clobbered
		: "r8", "r9", "r10", "cc" 				
		);
	} else {
		__asm__ volatile (
		"2:						\n"
		ROW1("#8")

		"	add	%[screen], %[screen], #(640-16)	\n" 
		"	add	%[depth], %[depth], #(320-8)	\n"
		"	subs 	%[lcount], %[lcount], #1	\n"
		"	bne	2b"
		// output
		: [lcount] "+r" (LineCount)
		// input
		: [gfx_z1] "r" (GFX.Z1),
		  [gfx_z2] "r" (GFX.Z2),
		  [colors] "r" (GFX.ScreenColors),
		  [delta] "r" (GFX.Delta << 1),
		  [fixedcolour] "r" (GFX.FixedColour),
		  [screen] "r" ((uint16 *) GFX.S + Offset),
		  [depth] "r" (GFX.ZBuffer + Offset),
		  [subdepth] "r" (GFX.DepthDelta - 1),
		  [bp] "r" (pCache + 56 - StartLine + 7)
		// clobbered
		: "r8", "r9", "r10", "cc" 				
		);
	}
} else {
    if (!(Tile & H_FLIP)){
		__asm__ volatile (
		"2:					\n"
		ROW("#8")

		"	add	%[screen], %[screen], #(640-16)	\n" 
		"	add	%[depth], %[depth], #(320-8)	\n"
		"	subs 	%[lcount], %[lcount], #1	\n"
		"	bne	2b"
		// output
		: [lcount] "+r" (LineCount)
		// input
		: [gfx_z1] "r" (GFX.Z1),
		  [gfx_z2] "r" (GFX.Z2),
		  [colors] "r" (GFX.ScreenColors),
		  [delta] "r" (GFX.Delta << 1),
		  [fixedcolour] "r" (GFX.FixedColour),
		  [screen] "r" ((uint16 *) GFX.S + Offset),
		  [depth] "r" (GFX.ZBuffer + Offset),
		  [subdepth] "r" (GFX.DepthDelta - 1),
		  [bp] "r" (pCache + StartLine)
		// clobbered
		: "r8", "r9", "r10", "cc" 				
		);
	} else {
		__asm__ volatile (
		"2:						\n"
		ROW1("#8")

		"	add	%[bp], %[bp], #(8+8)		\n"	
		"	add	%[screen], %[screen], #(640-16)	\n" 
		"	add	%[depth], %[depth], #(320-8)	\n"
		"	subs 	%[lcount], %[lcount], #1	\n"
		"	bne	2b"

		// output
		: [lcount] "+r" (LineCount)
		// input
		: [gfx_z1] "r" (GFX.Z1),
		  [gfx_z2] "r" (GFX.Z2),
		  [colors] "r" (GFX.ScreenColors),
		  [delta] "r" (GFX.Delta << 1),
		  [fixedcolour] "r" (GFX.FixedColour),
		  [screen] "r" ((uint16 *) GFX.S + Offset),
		  [depth] "r" (GFX.ZBuffer + Offset),
		  [subdepth] "r" (GFX.DepthDelta - 1),
		  [bp] "r" (pCache + StartLine + 7)
		// clobbered
		: "r8", "r9", "r10", "cc" 				
		);

	}
   }
}

#undef ROW
#undef ROW1

#endif // #ifdef __FAST_OBJS__


#define ROW(width) \
			"	ldrb	r8, [%[depth]], #1		\n"\
			"	mov	r10, " width "			\n" \
			"7:\n" \
			\
			"	cmp	%[gfx_z1], r8			\n"\
			"	ldrhib	r9, [%[bp]]		\n"\
			"	bls	3f				\n"\
										\
			"	movs	r9, r9, lsl #2			\n"\
			"	beq	3f				\n"\
										\
			"	ldrb	r8, [%[subdepth], %[depth]]	\n"\
			"	ldr	r9, [%[colors], r9]		\n"\
			"	strb	%[gfx_z2], [%[depth], #(-1)]	\n"\
										\
			"	cmp	r8, #1				\n"\
			"	blo	4f				\n"\
			"	mov	r8, #0x200000			\n"\
			"	ldrneh	r8, [%[screen], r8]		\n"\
			"	moveq	r8, %[fixedcolour]		\n"\
										\
			ROP \
			"4:						\n"\
			"	strh	r9, [%[screen]] 	\n"\
										\
			"3:						\n"\
			\
			"	subs	r10, r10, #1			\n"\
			"	add	%[bp], %[bp], #1		\n"\
			"	add	%[screen], %[screen], #2	\n"\
			"	ldrneb	r8, [%[depth]], #1		\n"\
			"	bne	7b				\n"

#define ROW1(width)	\
			"	ldrb	r8, [%[depth]], #1		\n"\
			"	mov	r10, " width "			\n" \
			"7:\n" \
			\
			"	cmp	%[gfx_z1], r8			\n"\
			"	ldrhib	r9, [%[bp]]			\n"\
			"	bls	3f				\n"\
										\
			"	movs	r9, r9, lsl #2			\n"\
			"	beq	3f				\n"\
										\
			"	ldrb	r8, [%[subdepth], %[depth]]	\n"\
			"	ldr	r9, [%[colors], r9]		\n"\
			"	strb	%[gfx_z2], [%[depth], #(-1)]	\n"\
										\
			"	cmp	r8, #1				\n"\
			"	blo	4f				\n"\
			"	mov	r8, #0x200000			\n"\
			"	ldrneh	r8, [%[screen], r8]		\n"\
			"	moveq	r8, %[fixedcolour]		\n"\
										\
			ROP \
			"4:						\n"\
			"	strh	r9, [%[screen]]		 	\n"\
										\
			"3:						\n"\
			\
			"	subs	r10, r10, #1			\n"\
			"	sub	%[bp], %[bp], #1  		\n"\
			"	add	%[screen], %[screen], #2	\n"\
			"	ldrneb	r8, [%[depth]], #1		\n"\
			"	bne	7b				\n"


// DrawTile16 -----------------------------------------
DEC_DRAW(ROPNAME)
{
     TILE_PREAMBLE 

  if (Tile & V_FLIP){
    if (!(Tile & H_FLIP)){
		__asm__ volatile (
		"2:					\n"

		ROW("#8")

		"	sub	%[bp], %[bp], #(8+8)		\n"	
		"	add	%[screen], %[screen], #(640-16)	\n" 
		"	add	%[depth], %[depth], #(320-8)	\n"
		"	subs 	%[lcount], %[lcount], #1	\n"
		"	bne	2b"
		// output
		: [lcount] "+r" (LineCount)
		// input
		: [gfx_z1] "r" (GFX.Z1),
		  [gfx_z2] "r" (GFX.Z2),
		  [colors] "r" (GFX.ScreenColors),
		  //[delta] "r" (GFX.Delta << 1),
		  [fixedcolour] "r" (GFX.FixedColour),
		  [screen] "r" ((uint16 *) GFX.S + Offset),
		  [depth] "r" (GFX.ZBuffer + Offset),
		  [subdepth] "r" (GFX.DepthDelta - 1),
 		  [bp] "r" (pCache + 56 - StartLine)
		// clobbered
		: "r8", "r9", "r10", "cc" 				
		);
	} else {
		__asm__ volatile (
		"2:						\n"
		ROW1("#8")

		"	add	%[screen], %[screen], #(640-16)	\n" 
		"	add	%[depth], %[depth], #(320-8)	\n"
		"	subs 	%[lcount], %[lcount], #1	\n"
		"	bne	2b"
		// output
		: [lcount] "+r" (LineCount)
		// input
		: [gfx_z1] "r" (GFX.Z1),
		  [gfx_z2] "r" (GFX.Z2),
		  [colors] "r" (GFX.ScreenColors),
		  //[delta] "r" (GFX.Delta << 1),
		  [fixedcolour] "r" (GFX.FixedColour),
		  [screen] "r" ((uint16 *) GFX.S + Offset),
		  [depth] "r" (GFX.ZBuffer + Offset),
		  [subdepth] "r" (GFX.DepthDelta - 1),
		  [bp] "r" (pCache + 56 - StartLine + 7)
		// clobbered
		: "r8", "r9", "r10", "cc" 				
		);
	}
} else {
    if (!(Tile & H_FLIP)){
		__asm__ volatile (
		"2:					\n"
		ROW("#8")

		"	add	%[screen], %[screen], #(640-16)	\n" 
		"	add	%[depth], %[depth], #(320-8)	\n"
		"	subs 	%[lcount], %[lcount], #1	\n"
		"	bne	2b"
		// output
		: [lcount] "+r" (LineCount)
		// input
		: [gfx_z1] "r" (GFX.Z1),
		  [gfx_z2] "r" (GFX.Z2),
		  [colors] "r" (GFX.ScreenColors),
		  //[delta] "r" (GFX.Delta << 1),
		  [fixedcolour] "r" (GFX.FixedColour),
		  [screen] "r" ((uint16 *) GFX.S + Offset),
		  [depth] "r" (GFX.ZBuffer + Offset),
		  [subdepth] "r" (GFX.DepthDelta - 1),
		  [bp] "r" (pCache + StartLine)
		// clobbered
		: "r8", "r9", "r10", "cc" 				
		);
	} else {
		__asm__ volatile (
		"2:						\n"
		ROW1("#8")

		"	add	%[bp], %[bp], #(8+8)		\n"	
		"	add	%[screen], %[screen], #(640-16)	\n" 
		"	add	%[depth], %[depth], #(320-8)	\n"
		"	subs 	%[lcount], %[lcount], #1	\n"
		"	bne	2b"

		// output
		: [lcount] "+r" (LineCount)
		// input
		: [gfx_z1] "r" (GFX.Z1),
		  [gfx_z2] "r" (GFX.Z2),
		  [colors] "r" (GFX.ScreenColors),
		  //[delta] "r" (GFX.Delta << 1),
		  [fixedcolour] "r" (GFX.FixedColour),
		  [screen] "r" ((uint16 *) GFX.S + Offset),
		  [depth] "r" (GFX.ZBuffer + Offset),
		  [subdepth] "r" (GFX.DepthDelta - 1),
		  [bp] "r" (pCache + StartLine + 7)
		// clobbered
		: "r8", "r9", "r10", "cc" 				
		);

	}
   }
}

// DrawClippedTile16 -----------------------------------------
DEC_DRAWCLIPPED(ROPNAME)
{
if (Width == 0) return;

     TILE_PREAMBLE 

Offset = Offset + StartPixel;
if (Tile & V_FLIP){
    if (!(Tile & H_FLIP)){
		__asm__ volatile (
		"2:					\n"

		ROW("%[width]")

		// Loop	
		"1:						\n"	
		"	sub	%[bp], %[bp], #8		\n"
		"	add	%[screen], %[screen], #640	\n" 
		"	add	%[depth], %[depth], #320	\n" 
		// --
		"	sub	%[bp], %[bp], %[width]		\n"
		"	sub	%[screen], %[screen], %[width], lsl #1	\n"
		"	sub	%[depth], %[depth], %[width]	\n"
		// --
		"	subs 	%[lcount], %[lcount], #1	\n"
		"	bne	2b"
		// output
		: [lcount] "+r" (LineCount)	
		// input
		: [gfx_z1] "r" (GFX.Z1),
		  [gfx_z2] "r" (GFX.Z2),
		  [colors] "r" (GFX.ScreenColors),
		  //[delta] "r" (GFX.Delta << 1),
		  [fixedcolour] "r" (GFX.FixedColour),
		  [width] "r" (Width),
		  [screen] "r" ((uint16 *) GFX.S + Offset),
		  [depth] "r" (GFX.ZBuffer + Offset),
		  [subdepth] "r" (GFX.DepthDelta - 1),
		  [bp] "r" (pCache + 56 - StartLine + StartPixel)
		// clobbered
		: "r8", "r9", "r10", "cc" 				
		);
	} else {
		__asm__ volatile (
		"2:					\n"
		ROW1("%[width]")
		// Loop	
		"1:						\n"	
		"	sub	%[bp], %[bp], #8		\n"	
		"	add	%[screen], %[screen], #640	\n" 
		"	add	%[depth], %[depth], #320	\n" 
		// --
		"	add	%[bp], %[bp], %[width]		\n"
		"	sub	%[screen], %[screen], %[width], lsl #1	\n"
		"	sub	%[depth], %[depth], %[width]	\n"
		// --
		"	subs 	%[lcount], %[lcount], #1	\n"
		"	bne	2b"
		// output
		: [lcount] "+r" (LineCount)
		// input
		: [gfx_z1] "r" (GFX.Z1),
		  [gfx_z2] "r" (GFX.Z2),
		  [colors] "r" (GFX.ScreenColors),
		  //[delta] "r" (GFX.Delta << 1),
		  [fixedcolour] "r" (GFX.FixedColour),
		  [width] "r" (Width),
		  [screen] "r" ((uint16 *) GFX.S + Offset),
		  [depth] "r" (GFX.ZBuffer + Offset),
		  [subdepth] "r" (GFX.DepthDelta - 1),
		  [bp] "r" (pCache + 56 - StartLine - StartPixel + 7)
		// clobbered
		: "r8", "r9", "r10", "cc" 				
		);
	}
} else {
    if (!(Tile & H_FLIP)){
		__asm__ volatile (
		"2:					\n"
		ROW("%[width]")
		// Loop	
		"1:						\n"
		"	add	%[bp], %[bp], #8		\n"	
		"	add	%[screen], %[screen], #640	\n" 
		"	add	%[depth], %[depth], #320	\n" 
		// --
		"	sub	%[bp], %[bp], %[width]		\n"
		"	sub	%[screen], %[screen], %[width], lsl #1	\n"
		"	sub	%[depth], %[depth], %[width]	\n"
		// --
		"	subs 	%[lcount], %[lcount], #1	\n"
		"	bne	2b"
		// output
		: [lcount] "+r" (LineCount)
		// input
		: [gfx_z1] "r" (GFX.Z1),
		  [gfx_z2] "r" (GFX.Z2),
		  [colors] "r" (GFX.ScreenColors),
		  //[delta] "r" (GFX.Delta << 1),
		  [fixedcolour] "r" (GFX.FixedColour),
		  [width] "r" (Width),
		  [screen] "r" ((uint16 *) GFX.S + Offset),
		  [depth] "r" (GFX.ZBuffer + Offset),
		  [subdepth] "r" (GFX.DepthDelta - 1),
		  [bp] "r" (pCache + StartLine + StartPixel)	
		// clobbered
		: "r8", "r9", "r10", "cc" 				
		);
	} else {
		__asm__ volatile (
		"2:					\n"
		ROW1("%[width]")
		// Loop	
		"1:						\n"	
		"	add	%[bp], %[bp], #8		\n"	
		"	add	%[screen], %[screen], #640	\n" 
		"	add	%[depth], %[depth], #320	\n" 
		// --
		"	add	%[bp], %[bp], %[width]		\n"
		"	sub	%[screen], %[screen], %[width], lsl #1	\n"
		"	sub	%[depth], %[depth], %[width]	\n"
		// --		
		"	subs 	%[lcount], %[lcount], #1	\n"
		"	bne	2b"
		// output
		: [lcount] "+r" (LineCount)
		// input
		: [gfx_z1] "r" (GFX.Z1),
		  [gfx_z2] "r" (GFX.Z2),
		  [colors] "r" (GFX.ScreenColors),
		  //[delta] "r" (GFX.Delta << 1),
		  [fixedcolour] "r" (GFX.FixedColour),
		  [width] "r" (Width),
		  [screen] "r" ((uint16 *) GFX.S + Offset),
		  [depth] "r" (GFX.ZBuffer + Offset),
		  [subdepth] "r" (GFX.DepthDelta - 1),
		  [bp] "r" (pCache + StartLine - StartPixel + 7)
		// clobbered
		: "r8", "r9", "r10", "cc" 				
		);

	}
   }
}