From 8d4b47298b6c9eeb9a3f79a5b80d894f80ed4a45 Mon Sep 17 00:00:00 2001 From: Michael Smith Date: Sat, 27 Dec 2025 03:05:05 +0000 Subject: 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. --- src/os.h | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) (limited to 'src/os.h') diff --git a/src/os.h b/src/os.h index 83b5d32..6466e45 100644 --- a/src/os.h +++ b/src/os.h @@ -120,10 +120,7 @@ typedef char os_char; #endif /* Copies n characters from src to dest, using the OS-specific char type. */ -static inline void os_spancopy(os_char *restrict dest, - const os_char *restrict src, int n) { - memcpy(dest, src, n * sizeof(os_char)); -} +void os_spancopy(os_char *restrict dest, const os_char *restrict src, int n); /* * Returns the last error code from an OS function - equivalent to calling -- cgit v1.2.3-54-g00ecf