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| author |  Michael Smith <mikesmiffy128@gmail.com>
| 2025-12-27 03:05:05 +0000 |
|---|---|---|
| committer | Michael Smith <mikesmiffy128@gmail.com>
| 2026-02-16 19:11:24 +0000 |
| commit | 8d4b47298b6c9eeb9a3f79a5b80d894f80ed4a45 (patch) | |
| tree | 63a8ea6f645b997fd7943a58a002e66244fa49ac /src/langext.h | |
| parent | e7943fb834cbcaec585ed68e67b5f17ceda504f7 (diff) | |
| download | sst-8d4b47298b6c9eeb9a3f79a5b80d894f80ed4a45.tar.gz sst-8d4b47298b6c9eeb9a3f79a5b80d894f80ed4a45.zip | |
Do away with memcpy/memset/memcmp
Now everything is either explicitly a rep thing, or explicitly some
other small run of reasonably efficient instructions. No library calls
or function call overhead of any kind. Code size remains nice and small.
Ban a few other bad libc functions while we're at it. More can be added
later if we decide that's a useful idea.
This will require some discipline and workarounds to cope with Clang's
tendency to shove mem* calls in places you don't want them even when you
tell it not to. Well, c'est la vie.
I'm a little nervous that the __builtin_memmove() usage in shuntvars()
could still one day emit actual library calls. It appears we're not
importing memmove() from anywhere at the moment, though. So I guess it's
good enough for now.
Also I had to get rid of alloca() in con_.c but that was kind of bad
anyway, so that's fine.
Diffstat (limited to 'src/langext.h')
| -rw-r--r-- | src/langext.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/src/langext.h b/src/langext.h index 7e3cbdb..6c57b24 100644 --- a/src/langext.h +++ b/src/langext.h @@ -18,6 +18,7 @@ #define assume(x) ((void)(!!(x) || (unreachable, 0))) #define cold __attribute((__cold__, __noinline__)) #define asm_only __attribute((__naked__)) // N.B.: may not actually work in GCC? +#define forceinline inline __attribute((__always_inline__)) #else #define if_hot(x) if (x) #define if_cold(x) if (x) @@ -27,12 +28,14 @@ #define assume(x) ((void)(__assume(x), 0)) #define cold __declspec(noinline) #define asm_only __declspec(naked) +#define forceinline __forceinline #else static inline _Noreturn void _invoke_ub() {} #define unreachable (_invoke_ub()) #define assume(x) ((void)(!!(x) || (_invoke_ub(), 0))) #define cold //#define asm_only // Can't use this without Clang/GCC/MSVC. Too bad. +#define forceinline inline #endif #endif |