Fix #172. Allow unroll optimizations when compiling with GCC.

Core/apu.c

@@ -69,9 +69,7 @@ static void update_sample(GB_gameboy_t *gb, unsigned index, int8_t value, unsign
 static void render(GB_gameboy_t *gb, bool no_downsampling, GB_sample_t *dest)
 {
     GB_sample_t output = {0,0};
-#ifdef __clang__
+
-    #pragma unroll
-#endif
     for (unsigned i = GB_N_CHANNELS; i--;) {
         double multiplier = CH_STEP;
         if (!is_DAC_enabled(gb, i)) {
@@ -128,9 +126,7 @@ static void render(GB_gameboy_t *gb, bool no_downsampling, GB_sample_t *dest)
             unsigned mask = gb->io_registers[GB_IO_NR51];
             unsigned left_volume = 0;
             unsigned right_volume = 0;
-#ifdef __clang__
+            UNROLL
-            #pragma unroll
-#endif
             for (unsigned i = GB_N_CHANNELS; i--;) {
                 if (gb->apu.is_active[i]) {
                     if (mask & 1) {
@@ -378,9 +374,7 @@ void GB_apu_run(GB_gameboy_t *gb)
         }
     }
     
-#ifdef __clang__
+    UNROLL
-    #pragma unroll
-#endif
     for (unsigned i = GB_SQUARE_2 + 1; i--;) {
         if (gb->apu.is_active[i]) {
             uint8_t cycles_left = cycles;

Core/display.c

@@ -27,9 +27,7 @@ static GB_fifo_item_t *fifo_pop(GB_fifo_t *fifo)
 static void fifo_push_bg_row(GB_fifo_t *fifo, uint8_t lower, uint8_t upper, uint8_t palette, bool bg_priority, bool flip_x)
 {
     if (!flip_x) {
-#ifdef __clang__
+        UNROLL
-        #pragma unroll
-#endif
         for (unsigned i = 8; i--;) {
             fifo->fifo[fifo->write_end] = (GB_fifo_item_t) {
                 (lower >> 7) | ((upper >> 7) << 1),
@@ -45,9 +43,7 @@ static void fifo_push_bg_row(GB_fifo_t *fifo, uint8_t lower, uint8_t upper, uint
         }
     }
     else {
-#ifdef __clang__
+        UNROLL
-        #pragma unroll
-#endif
         for (unsigned i = 8; i--;) {
             fifo->fifo[fifo->write_end] = (GB_fifo_item_t) {
                 (lower & 1) | ((upper & 1) << 1),
@@ -74,9 +70,7 @@ static void fifo_overlay_object_row(GB_fifo_t *fifo, uint8_t lower, uint8_t uppe
     
     uint8_t flip_xor = flip_x? 0: 0x7;
     
-#ifdef __clang__
+    UNROLL
-    #pragma unroll
-#endif
     for (unsigned i = 8; i--;) {
         uint8_t pixel = (lower >> 7) | ((upper >> 7) << 1);
         GB_fifo_item_t *target = &fifo->fifo[(fifo->read_end + (i ^ flip_xor)) & (GB_FIFO_LENGTH - 1)];
@@ -1123,9 +1117,7 @@ uint8_t GB_get_oam_info(GB_gameboy_t *gb, GB_oam_info_t *dest, uint8_t *sprite_h
         }
 
         for (unsigned y = 0; y < *sprite_height; y++) {
-#ifdef __clang__
+            UNROLL
-            #pragma unroll
-#endif
             for (unsigned x = 0; x < 8; x++) {
                 uint8_t color = (((gb->vram[vram_address    ] >> ((~x)&7)) & 1 ) |
                                  ((gb->vram[vram_address + 1] >> ((~x)&7)) & 1) << 1 );

Core/gb.h

@@ -29,6 +29,15 @@
 #define GB_MODEL_MGB_FAMILY 0x100
 #define GB_MODEL_CGB_FAMILY 0x200
 #define GB_MODEL_PAL_BIT 0x1000
+
+#if __clang__
+#define UNROLL _Pragma("unroll")
+#elif __GNUC__
+#define UNROLL _Pragma("GCC unroll 8")
+#else
+#define UNROLL
+#endif
+
 #endif
 
 #if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__

Makefile

@@ -204,7 +204,7 @@ $(BIN)/SameBoy.app/Contents/MacOS/SameBoy: $(CORE_OBJECTS) $(COCOA_OBJECTS)
 	-@$(MKDIR) -p $(dir $@)
 	$(CC) $^ -o $@ $(LDFLAGS) -framework OpenGL -framework AudioUnit -framework AVFoundation -framework CoreVideo -framework CoreMedia -framework IOKit
 ifeq ($(CONF), release)
-	strip $@
+	#strip $@
 endif
 
 $(BIN)/SameBoy.app/Contents/Resources/Base.lproj/%.nib: Cocoa/%.xib