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| author | Alexey Lapshin <alexey.lapshin@espressif.com> | 2025-01-27 10:45:55 +0000 |
|---|---|---|
| committer | Corinna Vinschen <corinna@vinschen.de> | 2025-02-10 15:30:46 +0100 |
| commit | ab827c1a6c2cb90cc2ded88a8f443a2f09c3bff7 (patch) | |
| tree | 05e418a8a064f363628fa0abfb2af5f07fbb80f5 /newlib/libc | |
| parent | bc2723e98929a327d0a281407bd68cfe8420c16c (diff) | |
| download | newlib-ab827c1a6c2cb90cc2ded88a8f443a2f09c3bff7.zip newlib-ab827c1a6c2cb90cc2ded88a8f443a2f09c3bff7.tar.gz newlib-ab827c1a6c2cb90cc2ded88a8f443a2f09c3bff7.tar.bz2 | |
newlib: mem[p]cpy/memmove improve performance for optimized versions
This change improves performance on memory blocks with sizes in range
[4..15]. Performance measurements made for RISCV machine (memset):
size 4, CPU cycles change: 50 -> 37
size 5, CPU cycles change: 57 -> 40
size 6, CPU cycles change: 64 -> 47
size 7, CPU cycles change: 71 -> 54
size 8, CPU cycles change: 78 -> 44
size 9, CPU cycles change: 85 -> 47
size 10, CPU cycles change: 92 -> 54
size 11, CPU cycles change: 99 -> 61
size 12, CPU cycles change: 106 -> 51
size 13, CPU cycles change: 113 -> 54
size 14, CPU cycles change: 120 -> 61
size 15, CPU cycles change: 127 -> 68
Diffstat (limited to 'newlib/libc')
| -rw-r--r-- | newlib/libc/string/memcpy.c | 2 | ||||
| -rw-r--r-- | newlib/libc/string/memmove.c | 2 | ||||
| -rw-r--r-- | newlib/libc/string/mempcpy.c | 2 |
3 files changed, 3 insertions, 3 deletions
diff --git a/newlib/libc/string/memcpy.c b/newlib/libc/string/memcpy.c index 1bbd4e0..e680c44 100644 --- a/newlib/libc/string/memcpy.c +++ b/newlib/libc/string/memcpy.c @@ -57,7 +57,7 @@ memcpy (void *__restrict dst0, /* If the size is small, or either SRC or DST is unaligned, then punt into the byte copy loop. This should be rare. */ - if (!TOO_SMALL_BIG_BLOCK(len0) && !UNALIGNED_X_Y(src, dst)) + if (!TOO_SMALL_LITTLE_BLOCK(len0) && !UNALIGNED_X_Y(src, dst)) { aligned_dst = (long*)dst; aligned_src = (long*)src; diff --git a/newlib/libc/string/memmove.c b/newlib/libc/string/memmove.c index a82744c..4c5ec6f 100644 --- a/newlib/libc/string/memmove.c +++ b/newlib/libc/string/memmove.c @@ -85,7 +85,7 @@ memmove (void *dst_void, /* Use optimizing algorithm for a non-destructive copy to closely match memcpy. If the size is small or either SRC or DST is unaligned, then punt into the byte copy loop. This should be rare. */ - if (!TOO_SMALL_BIG_BLOCK(length) && !UNALIGNED_X_Y(src, dst)) + if (!TOO_SMALL_LITTLE_BLOCK(length) && !UNALIGNED_X_Y(src, dst)) { aligned_dst = (long*)dst; aligned_src = (long*)src; diff --git a/newlib/libc/string/mempcpy.c b/newlib/libc/string/mempcpy.c index 06e97de..5618921 100644 --- a/newlib/libc/string/mempcpy.c +++ b/newlib/libc/string/mempcpy.c @@ -53,7 +53,7 @@ mempcpy (void *dst0, /* If the size is small, or either SRC or DST is unaligned, then punt into the byte copy loop. This should be rare. */ - if (!TOO_SMALL_BIG_BLOCK(len0) && !UNALIGNED_X_Y(src, dst)) + if (!TOO_SMALL_LITTLE_BLOCK(len0) && !UNALIGNED_X_Y(src, dst)) { aligned_dst = (long*)dst; aligned_src = (long*)src; |