X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=pico%2Fpico_port.h;h=e26e6ca2cdea2cef199f6689c837e3b8aab1f437;hb=refs%2Fheads%2Fmaster;hp=70802202685339ee28c506c939fe06acd78bfde4;hpb=35f2b65ef708e7afc922ceda8d00b716de289610;p=picodrive.git

diff --git a/pico/pico_port.h b/pico/pico_port.h
index 70802202..41a4ce2f 100644
--- a/pico/pico_port.h
+++ b/pico/pico_port.h
@@ -1,6 +1,17 @@
 #ifndef PICO_PORT_INCLUDED
 #define PICO_PORT_INCLUDED
 
+// provide size_t, uintptr_t
+#include <stdlib.h>
+#if !(defined(_MSC_VER) && _MSC_VER < 1800)
+#include <stdint.h>
+#endif
+#include "pico_types.h"
+
+#ifdef USE_LIBRETRO_VFS
+#include "file_stream_transforms.h"
+#endif
+
 #if defined(__GNUC__) && defined(__i386__)
 #define REGPARM(x) __attribute__((regparm(x)))
 #else
@@ -11,10 +22,12 @@
 #define NOINLINE    __attribute__((noinline))
 #define ALIGNED(n)  __attribute__((aligned(n)))
 #define unlikely(x) __builtin_expect((x), 0)
+#define likely(x)   __builtin_expect(!!(x), 1)
 #else
 #define NOINLINE
 #define ALIGNED(n)
 #define unlikely(x) (x)
+#define likely(x) (x)
 #endif
 
 #ifdef _MSC_VER
@@ -24,4 +37,47 @@
 #define strdup _strdup
 #endif
 
+
+// There's no standard way to determine endianess at compile time. Try using
+// some well known non-standard macros for detection.
+#if defined __BYTE_ORDER__
+#define	CPU_IS_LE	__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
+#elif defined __BYTE_ORDER
+#define	CPU_IS_LE	__BYTE_ORDER == __LITTLE_ENDIAN
+#elif defined __BIG_ENDIAN__ || defined _M_PPC // Windows on PPC was big endian
+#define	CPU_IS_LE	0
+#elif defined __LITTLE_ENDIAN__ || defined _WIN32 // all other Windows is LE
+#define	CPU_IS_LE	1
+#else
+#warning "can't detect byte order, assume little endian"
+#define	CPU_IS_LE	1
+#endif
+// NB mixed endian integer platforms are not supported.
+
+#if CPU_IS_LE
+// address/offset operations
+#define MEM_BE2(a)	((a)^1)		// addr/offs of u8 in u16, or u16 in u32
+#define MEM_BE4(a)	((a)^3)		// addr/offs of u8 in u32
+#define MEM_LE2(a)	(a)
+#define MEM_LE4(a)	(a)
+// swapping
+#define CPU_BE2(v)	((u32)((u64)(v)<<16)|((u32)(v)>>16))
+#define CPU_BE4(v)	(((u32)(v)>>24)|(((v)>>8)&0x00ff00)| \
+			(((v)<<8)&0xff0000)|(u32)((v)<<24))
+#define CPU_LE2(v)	(v)		// swap of 2*u16 in u32
+#define CPU_LE4(v)	(v)		// swap of 4*u8  in u32
+#else
+// address/offset operations
+#define MEM_BE2(a)	(a)
+#define MEM_BE4(a)	(a)
+#define MEM_LE2(a)	((a)^1)
+#define MEM_LE4(a)	((a)^3)
+// swapping
+#define CPU_BE2(v)	(v)
+#define CPU_BE4(v)	(v)
+#define CPU_LE2(v)	((u32)((u64)(v)<<16)|((u32)(v)>>16))
+#define CPU_LE4(v)	(((u32)(v)>>24)|(((v)>>8)&0x00ff00)| \
+			(((v)<<8)&0xff0000)|(u32)((v)<<24))
+#endif
+
 #endif // PICO_PORT_INCLUDED