From: Xinchen Hui <laruence@gmail.com>
Date: Sun, 18 Feb 2018 11:47:41 +0000 (+0800)
Subject: change layout
X-Git-Tag: php-7.3.0alpha1~370
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=22e7329d9a38a74b1699b16e1797063e0880d734;p=php

change layout
---

diff --git a/ext/standard/string.c b/ext/standard/string.c
index fce878358a..1843844103 100644
--- a/ext/standard/string.c
+++ b/ext/standard/string.c
@@ -3531,19 +3531,19 @@ PHP_FUNCTION(strrev)
 	e = s + ZSTR_LEN(str);
 	--e;
 #if ZEND_INTRIN_SSSE3_NATIVE
-	do {
+	if (e - s > 15) {
 		const __m128i map = _mm_set_epi8(
 				0, 1, 2, 3,
 				4, 5, 6, 7,
 				8, 9, 10, 11,
 				12, 13, 14, 15);
-		while (e - s > 15) {
+		do {
 			const __m128i str = _mm_loadu_si128((__m128i *)(e - 15));
 			_mm_storeu_si128((__m128i *)p, _mm_shuffle_epi8(str, map));
 			p += 16;
 			e -= 16;
-		}
-	} while(0);
+		} while (e - s > 15);
+	}
 #endif
 	while (e >= s) {
 		*p++ = *e--;