diff options
| author | Richard Earnshaw <rearnsha@arm.com> | 2014-08-19 14:44:44 +0400 |
|---|---|---|
| committer | Richard Earnshaw <rearnsha@arm.com> | 2014-08-19 14:44:44 +0400 |
| commit | 59c3d5a1a4c0d8ee4f1da2c9e449ed9ab4edd4b6 (patch) | |
| tree | 4c5a8a27bdb1d4223785c257a1b6e8ce49f17a22 /newlib/libc/machine | |
| parent | de1c312566d9d33b46e039505cc3d61b4de40b89 (diff) | |
* libc/machine/aarch64/memchr.S: Add check for zero-sized buffer.
Diffstat (limited to 'newlib/libc/machine')
| -rw-r--r-- | newlib/libc/machine/aarch64/memchr.S | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/newlib/libc/machine/aarch64/memchr.S b/newlib/libc/machine/aarch64/memchr.S index eb59a5aad..53f5d6bc0 100644 --- a/newlib/libc/machine/aarch64/memchr.S +++ b/newlib/libc/machine/aarch64/memchr.S @@ -79,6 +79,8 @@ .endm def_fn memchr + /* Do not dereference srcin if no bytes to compare. */ + cbz cntin, .Lzero_length /* * Magic constant 0x40100401 allows us to identify which lane matches * the requested byte. @@ -166,5 +168,9 @@ def_fn memchr csel result, xzr, result, eq ret +.Lzero_length: + mov result, #0 + ret + .size memchr, . - memchr #endif |