Add BGR support and add PS2 platform

Makefile

@@ -170,6 +170,16 @@ else ifeq ($(platform), classic_armv7_a7)
 	endif
 #######################################
 
+else ifeq ($(platform), ps2)
+	TARGET := $(TARGET_NAME)_libretro_$(platform).a
+	CC = mips64r5900el-ps2-elf-gcc$(EXE_EXT)
+	CXX = mips64r5900el-ps2-elf-g++$(EXE_EXT)
+	AR = mips64r5900el-ps2-elf-ar$(EXE_EXT)
+	STATIC_LINKING = 1
+	LOAD_FROM_MEMORY_TEST = 0
+   CFLAGS += -DPS2 -G0 -DFRAME_SKIP -fomit-frame-pointer -ffast-math
+	STATIC_LINKING := 1
+
 else ifeq ($(platform), psp1)
 	TARGET := $(TARGET_NAME)_libretro_$(platform).a
 	CC = psp-gcc$(EXE_EXT)
@@ -335,7 +345,7 @@ LIBRETRO_DIR := ./libretro
 ifeq ($(DEBUG), 1)
 DEFINES += -O0 -g
 else
-DEFINES += -O2 -DNDEBUG=1
+DEFINES += -O3 -DNDEBUG=1
 endif
 
 LDFLAGS += $(LIBM)

src/gfx.h

@@ -224,7 +224,7 @@ static INLINE uint16_t COLOR_ADD(uint16_t C1, uint16_t C2)
 {
 	const int RED_MASK   = 0x1F << RED_SHIFT_BITS;
 	const int GREEN_MASK = 0x1F << GREEN_SHIFT_BITS;
-	const int BLUE_MASK  = 0x1F;
+	const int BLUE_MASK  = 0x1F << BLUE_SHIFT_BITS;
 
 	int rb          = (C1 & (RED_MASK | BLUE_MASK)) + (C2 & (RED_MASK | BLUE_MASK));
 	int rbcarry     = rb & ((0x20 << RED_SHIFT_BITS) | (0x20 << 0));

src/pixform.h

@@ -88,6 +88,7 @@ extern uint32 HIGH_BITS_SHIFTED_TWO_MASK;
 #define MAX_BLUE_RGB565           31
 #define RED_SHIFT_BITS_RGB565     11
 #define GREEN_SHIFT_BITS_RGB565   6
+#define BLUE_SHIFT_BITS_RGB565    0
 #define RED_LOW_BIT_MASK_RGB565   0x0800
 #define GREEN_LOW_BIT_MASK_RGB565 0x0020
 #define BLUE_LOW_BIT_MASK_RGB565  0x0001
@@ -99,6 +100,29 @@ extern uint32 HIGH_BITS_SHIFTED_TWO_MASK;
 #define THIRD_COLOR_MASK_RGB565   0x001F
 #define ALPHA_BITS_MASK_RGB565    0x0000
 
+// BGR555 format
+#define BUILD_PIXEL_BGR555(R,G,B) (((int) (B) << 10) | ((int) (G) << 5) | (int) (R))
+#define BUILD_PIXEL2_BGR555(R,G,B) (((int) (B) << 10) | ((int) (G) << 5) | (int) (R))
+#define DECOMPOSE_PIXEL_BGR555(PIX,R,G,B) {(B) = (PIX) >> 10; (G) = ((PIX) >> 5) & 0x1f; (R) = (PIX) & 0x1f; }
+#define SPARE_RGB_BIT_MASK_BGR555 (1 << 5)
+
+#define MAX_RED_BGR555            31
+#define MAX_GREEN_BGR555          31
+#define MAX_BLUE_BGR555           31
+#define RED_SHIFT_BITS_BGR555     0
+#define GREEN_SHIFT_BITS_BGR555   5
+#define BLUE_SHIFT_BITS_BGR555    10
+#define RED_LOW_BIT_MASK_BGR555   0x0001
+#define GREEN_LOW_BIT_MASK_BGR555 0x0020
+#define BLUE_LOW_BIT_MASK_BGR555  0x0400
+#define RED_HI_BIT_MASK_BGR555    0x0010
+#define GREEN_HI_BIT_MASK_BGR555  0x0200
+#define BLUE_HI_BIT_MASK_BGR555   0x4000
+#define FIRST_COLOR_MASK_BGR555   0x7C00
+#define SECOND_COLOR_MASK_BGR555  0x03E0
+#define THIRD_COLOR_MASK_BGR555   0x001F
+#define ALPHA_BITS_MASK_BGR555    0x0000
+
 // RGB555 format
 #define BUILD_PIXEL_RGB555(R,G,B) (((int) (R) << 10) | ((int) (G) << 5) | (int) (B))
 #define BUILD_PIXEL2_RGB555(R,G,B) (((int) (R) << 10) | ((int) (G) << 5) | (int) (B))
@@ -110,6 +134,7 @@ extern uint32 HIGH_BITS_SHIFTED_TWO_MASK;
 #define MAX_BLUE_RGB555           31
 #define RED_SHIFT_BITS_RGB555     10
 #define GREEN_SHIFT_BITS_RGB555   5
+#define BLUE_SHIFT_BITS_RGB555    0
 #define RED_LOW_BIT_MASK_RGB555   0x0400
 #define GREEN_LOW_BIT_MASK_RGB555 0x0020
 #define BLUE_LOW_BIT_MASK_RGB555  0x0001
@@ -139,6 +164,7 @@ extern uint32 HIGH_BITS_SHIFTED_TWO_MASK;
 #define MAX_GREEN_D(F)          CONCAT(MAX_GREEN_,F)
 #define RED_SHIFT_BITS_D(F)     CONCAT(RED_SHIFT_BITS_, F)
 #define GREEN_SHIFT_BITS_D(F)   CONCAT(GREEN_SHIFT_BITS_, F)
+#define BLUE_SHIFT_BITS_D(F)    CONCAT(BLUE_SHIFT_BITS_, F)
 #define RED_LOW_BIT_MASK_D(F)   CONCAT(RED_LOW_BIT_MASK_,F)
 #define BLUE_LOW_BIT_MASK_D(F)  CONCAT(BLUE_LOW_BIT_MASK_,F)
 #define GREEN_LOW_BIT_MASK_D(F) CONCAT(GREEN_LOW_BIT_MASK_,F)
@@ -155,6 +181,7 @@ extern uint32 HIGH_BITS_SHIFTED_TWO_MASK;
 #define MAX_GREEN               MAX_GREEN_D(PIXEL_FORMAT)
 #define RED_SHIFT_BITS          RED_SHIFT_BITS_D(PIXEL_FORMAT)
 #define GREEN_SHIFT_BITS        GREEN_SHIFT_BITS_D(PIXEL_FORMAT)
+#define BLUE_SHIFT_BITS         BLUE_SHIFT_BITS_D(PIXEL_FORMAT)
 #define RED_LOW_BIT_MASK        RED_LOW_BIT_MASK_D(PIXEL_FORMAT)
 #define BLUE_LOW_BIT_MASK       BLUE_LOW_BIT_MASK_D(PIXEL_FORMAT)
 #define GREEN_LOW_BIT_MASK      GREEN_LOW_BIT_MASK_D(PIXEL_FORMAT)

src/port.h

@@ -110,7 +110,11 @@ typedef short        int16_32;
 #define VAR_CYCLES
 //#define SPC700_SHUTDOWN
 #define FASTCALL
+#if defined(PS2)
+#define PIXEL_FORMAT BGR555
+#else 
 #define PIXEL_FORMAT RGB565
+#endif
 #define CPU_SHUTDOWN
 #define PACKING __attribute__ ((packed))
 #define ALIGN_BY_ONE  __attribute__ ((aligned (1), packed))