M src/util/common.h → src/util/common.h

@@ -73,6 +73,15 @@ uint32_t _addr = (ADDR); \
 	void* _ptr = (ARR); \
 	__asm__("sthbrx %0, %1, %2" : : "r"(SRC), "b"(_ptr), "r"(_addr)); \
 }
+#elif defined __BIG_ENDIAN__
+#if defined(__llvm__) || (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 8)
+#define LOAD_32LE(DEST, ADDR, ARR) DEST = __builtin_bswap32(((uint32_t*) ARR)[(ADDR) >> 2])
+#define LOAD_16LE(DEST, ADDR, ARR) DEST = __builtin_bswap16(((uint16_t*) ARR)[(ADDR) >> 1])
+#define STORE_32LE(SRC, ADDR, ARR) ((uint32_t*) ARR)[(ADDR) >> 2] = __builtin_bswap32(SRC)
+#define STORE_16LE(SRC, ADDR, ARR) ((uint16_t*) ARR)[(ADDR) >> 1] = __builtin_bswap16(SRC)
+#else
+#error Big endian build not supported on this platform.
+#endif
 #else
 #define LOAD_32LE(DEST, ADDR, ARR) DEST = ((uint32_t*) ARR)[(ADDR) >> 2]
 #define LOAD_16LE(DEST, ADDR, ARR) DEST = ((uint16_t*) ARR)[(ADDR) >> 1]

M src/util/png-io.c → src/util/png-io.c

@@ -65,7 +65,7 @@ unsigned i;
 	for (i = 0; i < height; ++i) {
 		unsigned x;
 		for (x = 0; x < width; ++x) {
-#if defined(__POWERPC__) || defined(__PPC__)
+#ifdef __BIG_ENDIAN__
 			row[x * 3] = pixelData[stride * i * 4 + x * 4 + 3];
 			row[x * 3 + 1] = pixelData[stride * i * 4 + x * 4 + 2];
 			row[x * 3 + 2] = pixelData[stride * i * 4 + x * 4 + 1];
@@ -173,8 +173,7 @@ for (i = 0; i < pngHeight; ++i) {
 		png_read_row(png, row, 0);
 		unsigned x;
 		for (x = 0; x < pngWidth; ++x) {
-
-#if defined(__POWERPC__) || defined(__PPC__)
+#if __BIG_ENDIAN__
 			pixelData[stride * i * 4 + x * 4 + 3] = row[x * 3];
 			pixelData[stride * i * 4 + x * 4 + 2] = row[x * 3 + 1];
 			pixelData[stride * i * 4 + x * 4 + 1] = row[x * 3 + 2];