42b8daf88
Denis Vlasenko
2008-06-27
Subject
expand comment about FAST_FUNC
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include/platform.h+8 -1
| @@ -97,9 +97,15 @@ | |
| # endif | |
| #endif | |
| + | /* FAST_FUNC is a qualifier which (possibly) makes function call faster |
| + | * and/or smaller by using modified ABI. It is usually only needed |
| + | * on non-static, busybox internal functions. Recent versions of gcc |
| + | * optimize statics automatically. FAST_FUNC on static is required |
| + | * only if you need to match a function pointer's type */ |
| #if __GNUC_PREREQ(3,0) && defined(i386) | |
| /* || defined(__x86_64__)? */ | |
| # define FAST_FUNC __attribute__((regparm(3))) | |
| + | /* #elif ... - add your favorite arch today! */ |
| #else | |
| # define FAST_FUNC | |
| #endif | |
| @@ -145,8 +151,9 @@ | |
| /* ---- Unaligned access ------------------------------------ */ | |
| /* parameter is supposed to be an uint32_t* ptr */ | |
| - | #if defined(i386) || defined(__x86_64__) /* + other arches? */ |
| + | #if defined(i386) || defined(__x86_64__) |
| #define get_unaligned_u32p(u32p) (*(u32p)) | |
| + | /* #elif ... - add your favorite arch today! */ |
| #else | |
| /* performs reasonably well (gcc usually inlines memcpy here) */ | |
| #define get_unaligned_u32p(u32p) ({ uint32_t __t; memcpy(&__t, (u32p), 4); __t; }) | |