From 83f858611107c21ec4dfc86c628cf893c0272a34 Mon Sep 17 00:00:00 2001 From: unknown Date: Thu, 1 Oct 2015 13:58:19 -0400 Subject: [PATCH] added constants/macros to help maintain endian changes --- .../N64 System/Mips/Memory Virtual Mem.h | 20 ++++++++++++++++++- 1 file changed, 19 insertions(+), 1 deletion(-) diff --git a/Source/Project64/N64 System/Mips/Memory Virtual Mem.h b/Source/Project64/N64 System/Mips/Memory Virtual Mem.h index 34a459ca6..334bbfa60 100644 --- a/Source/Project64/N64 System/Mips/Memory Virtual Mem.h +++ b/Source/Project64/N64 System/Mips/Memory Virtual Mem.h @@ -30,7 +30,25 @@ #define Eip Rip #endif -extern unsigned long swap32by8(unsigned long word); +/* + * This will help us gradually be able to port Project64 for big-endian CPUs + * later. Currently it is written to assume 32-bit little-endian, like so: + * + * 0xAABBCCDD EEFFGGHH --> 0xDDCCBBAA HHGGFFEE + * GPR bits[63..0] b1b2b3b4 b5b6b7b8 + */ +#define BYTE_SWAP_MASK 3u +#define HALF_SWAP_MASK ((BYTE_SWAP_MASK) & ~1u) +#define WORD_SWAP_MASK ((BYTE_SWAP_MASK) & ~3u) + +// Convert MIPS server-native byte order to client-native endian. +#define BES(offset) ((offset) ^ (BYTE_SWAP_MASK)) + +// Convert MIPS server-native halfword order to client-native int16_t order. +#define HES(offset) ((offset) ^ (HALF_SWAP_MASK)) + +// Convert MIPS server-native word order to client-native int32_t order. +#define WES(offset) ((offset) ^ (WORD_SWAP_MASK)) class CMipsMemoryVM : public CMipsMemory,