initial pocketsnes commit

1 files changed, 168 insertions, 0 deletions

diff --git a/src/rops.h b/src/rops.h
new file mode 100644
index 0000000..e751a58
--- /dev/null
+++ b/src/rops.h
@@ -0,0 +1,168 @@
+#ifndef __ROPS_H__
+#define __ROPS_H__
+
+/*
+	Raster Operations macros 
+*/
+
+// -------------
+// RGB_565
+// a.red = a.red - b.red
+// a.blue = a.blue - b.blue
+// a.green = a.green - b.green
+/*
+#define ROP_SUB(a, b) \
+			"	bics	" #b ", " #b ", #0b00000100000100000	\n"\
+			"	orr	" #a ", " #a ", #0b00000100000100000	\n"\
+			"	orr	" #a ", " #a ", #0b10000000000000000	\n"\
+			"	sub	" #a ", " #a ", " #b " 			\n"\
+			"	tst	" #a ", #0b00000000000100000	\n"\
+			"	biceq	" #a ", " #a ", #0b00000000000011111	\n"\
+			"	tst	" #a ", #0b00000100000000000	\n"\
+			"	biceq	" #a ", " #a ", #0b00000011111100000	\n"\
+			"	tst	" #a ", #0b10000000000000000	\n"\
+			"	biceq	" #a ", " #a ", #0b01111100000000000	\n"
+*/
+#define ROP_SUB(a, b) \
+			"	bics	" #b ", " #b ", #0b00000100000100000	\n"\
+			"	beq	999f	\n"\
+			"	orr	" #a ", " #a ", #0b00000100000100000	\n"\
+			"	orr	" #a ", " #a ", #(1 << 31)	\n"\
+			"	subs	" #a ", " #a ", " #b " 			\n"\
+			"	bicpl	" #a ", " #a ", #0b01111100000000000	\n"\
+			"	tst	" #a ", #0b00000000000100000	\n"\
+			"	biceq	" #a ", " #a ", #0b00000000000011111	\n"\
+			"	tst	" #a ", #0b00000100000000000	\n"\
+			"	biceq	" #a ", " #a ", #0b00000011111100000	\n"\
+			"999:\n"
+
+
+// -------------
+// RGB_565
+// if ZF set do ROP_SUB, else:
+// a.red = (a.red - b.red) / 2
+// a.blue = (a.blue - b.blue) / 2
+// a.green = (a.green - b.green) / 2
+/*
+#define ROP_SUB1_2(a, b) \
+			"	movne	" #a ", " #a ", lsr #1			\n"\
+			"	bicne	" #a ", " #a ", #0b00000010000010000	\n"\
+			"	movne	" #b ", " #b ", lsr #1			\n"\
+			"	bicne	" #b ", " #b ", #0b00000010000010000	\n"\
+										\
+			"	bic	" #b ", " #b ", #0b00000100000100000	\n"\
+			"	orr	" #a ", " #a ", #0b00000100000100000	\n"\
+			"	orr	" #a ", " #a ", #0b10000000000000000	\n"\
+			"	sub	" #a ", " #a ", " #b " 			\n"\
+			"	tst	" #a ", #0b00000000000100000	\n"\
+			"	biceq	" #a ", " #a ", #0b00000000000011111	\n"\
+			"	tst	" #a ", #0b00000100000000000	\n"\
+			"	biceq	" #a ", " #a ", #0b00000011111100000	\n"\
+			"	tst	" #a ", #0b10000000000000000	\n"\
+			"	biceq	" #a ", " #a ", #0b01111100000000000	\n"
+*/
+
+#define ROP_SUB1_2(a, b) \
+			"	movne	" #a ", " #a ", lsr #1			\n"\
+			"	bicne	" #a ", " #a ", #0b00000010000010000	\n"\
+			"	movne	" #b ", " #b ", lsr #1			\n"\
+			"	bicne	" #b ", " #b ", #0b00000010000010000	\n"\
+										\
+			"	bics	" #b ", " #b ", #0b00000100000100000	\n"\
+			"	beq	999f \n"\
+			"	orr	" #a ", " #a ", #0b00000100000100000	\n"\
+			"	orr	" #a ", " #a ", #(1 << 31)	\n"\
+			"	subs	" #a ", " #a ", " #b " 			\n"\
+			"	bicpl	" #a ", " #a ", #0b01111100000000000	\n"\
+			"	tst	" #a ", #0b00000000000100000	\n"\
+			"	biceq	" #a ", " #a ", #0b00000000000011111	\n"\
+			"	tst	" #a ", #0b00000100000000000	\n"\
+			"	biceq	" #a ", " #a ", #0b00000011111100000	\n"\
+			"999:\n"
+
+
+// -------------
+// RGB_565
+// a.red = a.red + b.red
+// a.blue = a.blue + b.blue
+// a.green = a.green + b.green
+#define ROP_ADD(a, b) \
+			"	bics	" #b ", " #b ", #0b00000100000100000	\n"\
+			"	beq	999f \n"\
+			"	bic	" #a ", " #a ", #0b00000100000100000	\n"\
+			"	add	" #a ", " #a ", " #b " 			\n"\
+			"	tst	" #a ", #0b00000000000100000	\n"\
+			"	orrne	" #a ", " #a ", #0b00000000000011111	\n"\
+			"	tst	" #a ", #0b00000100000000000	\n"\
+			"	orrne	" #a ", " #a ", #0b00000011111100000	\n"\
+			"	tst	" #a ", #0b10000000000000000	\n"\
+			"	orrne	" #a ", " #a ", #0b01111100000000000	\n"\
+			"999:\n"
+
+// -------------
+// RGB_565
+// if ZF set do ROP_ADD, else:
+// a.red = (a.red + b.red) / 2
+// a.blue = (a.blue + b.blue) / 2
+// a.green = (a.green + b.green) / 2
+#define ROP_ADD1_2(a, b) \
+			"	bic	" #a ", " #a ", #0b00000100000100000	\n"\
+			"	bicne	" #a ", " #a ", #0b00001000001000000	\n"\
+			"	bic	" #b ", " #b ", #0b00000100000100000	\n"\
+			"	bicne	" #b ", " #b ", #0b00001000001000000	\n"\
+			"	add	" #a ", " #a ", " #b "			\n"\
+			"	movne	" #a ", " #a ", lsr #1			\n"\
+			"	tst	" #a ", #0b00000000000100000	\n"\
+			"	orrne	" #a ", " #a ", #0b00000000000011111	\n"\
+			"	tst	" #a ", #0b00000100000000000	\n"\
+			"	orrne	" #a ", " #a ", #0b00000011111100000	\n"\
+			"	tst	" #a ", #0b10000000000000000	\n"\
+			"	orrne	" #a ", " #a ", #0b01111100000000000	\n"
+
+
+typedef struct {
+	unsigned char line;
+	unsigned char rop;
+	unsigned int value;
+} ROPSTRUCT;
+
+#define MAX_ROPS	0x10000
+extern ROPSTRUCT rops[MAX_ROPS];
+extern unsigned int ROpCount;
+
+#define ROP_NOP			0
+#define ROP_FIXEDCOLOUR		1
+#define ROP_PALETTE		2
+#define ROP_SCREEN_MODE		3
+#define ROP_BRIGHTNESS		4
+#define ROP_FORCE_BLANKING	5
+#define ROP_TILE_ADDRESS	6
+#define ROP_MOSAIC		7
+#define ROP_BG_SCSIZE_SCBASE	8
+#define ROP_BG_NAMEBASE		9
+#define ROP_MODE7_ROTATION	10
+#define ROP_BG_WINDOW_ENABLE	11
+#define ROP_WINDOW1_LEFT	12
+#define ROP_WINDOW1_RIGHT	13
+#define ROP_WINDOW2_LEFT	14
+#define ROP_WINDOW2_RIGHT	15
+#define ROP_BG_WINDOW_LOGIC	16
+#define ROP_OBJS_WINDOW_LOGIC	17
+#define ROP_MAIN_SCREEN_DESIG	18
+#define ROP_SUB_SCREEN_DESIG	19
+#define ROP_MAIN_SCREEN_WMASK	20
+#define ROP_SUB_SCREEN_WMASK	21
+#define ROP_FIXEDCOL_OR_SCREEN	22
+#define ROP_ADD_OR_SUB_COLOR	23
+
+#define ADD_ROP(drop, dval)	{rops[ROpCount].line = IPPU.CurrentLine; rops[ROpCount].rop = drop; rops[ROpCount].value = dval; ROpCount++;}
+#define RESET_ROPS(from)	\
+	{ \
+	for (unsigned int c = from; c < ROpCount; c++) doRaster(&rops[c]);\
+	ROpCount = 0;\
+	}
+
+void doRaster(ROPSTRUCT *rop);
+bool wouldRasterAlterStatus(ROPSTRUCT *rop);
+
+#endif