From d81eb77b4aaf579c151f7d16eef807838fcef9cc Mon Sep 17 00:00:00 2001
From: Nikita Popov <nikita.ppv@gmail.com>
Date: Wed, 2 Oct 2019 14:41:02 +0200
Subject: [PATCH] Fix AArch64 build

---
 ext/standard/crc32.c | 49 ++++++++++++++++++++++++++++---------------------
 1 file changed, 28 insertions(+), 21 deletions(-)

diff --git a/ext/standard/crc32.c b/ext/standard/crc32.c
index 904ea25ff79..853c95ef54f 100644
--- a/ext/standard/crc32.c
+++ b/ext/standard/crc32.c
@@ -21,7 +21,6 @@
 #include "crc32.h"
 
 #if defined(__aarch64__)
-# pragma GCC target ("+nothing+crc")
 # include <arm_acle.h>
 # if defined(__linux__)
 #  include <sys/auxv.h>
@@ -44,6 +43,31 @@ static inline int has_crc32_insn() {
 	return res;
 # endif
 }
+
+# pragma GCC push_options
+# pragma GCC target ("+nothing+crc")
+static uint32_t crc32_aarch64(uint32_t crc, char *p, size_t nr) {
+	while (nr >= sizeof(uint64_t)) {
+		crc = __crc32d(crc, *(uint64_t *)p);
+		p += sizeof(uint64_t);
+		nr -= sizeof(uint64_t);
+	}
+	if (nr >= sizeof(int32_t)) {
+		crc = __crc32w(crc, *(uint32_t *)p);
+		p += sizeof(uint32_t);
+		nr -= sizeof(uint32_t);
+	}
+	if (nr >= sizeof(int16_t)) {
+		crc = __crc32h(crc, *(uint16_t *)p);
+		p += sizeof(uint16_t);
+		nr -= sizeof(uint16_t);
+	}
+	if (nr) {
+		crc = __crc32b(crc, *p);
+	}
+	return crc;
+}
+# pragma GCC pop_options
 #endif
 
 /* {{{ proto string crc32(string str)
@@ -63,28 +87,11 @@ PHP_NAMED_FUNCTION(php_if_crc32)
 
 #if defined(__aarch64__)
 	if (has_crc32_insn()) {
-		while(nr >= sizeof(uint64_t)) {
-			crc = __crc32d(crc, *(uint64_t *)p);
-			p += sizeof(uint64_t);
-			nr -= sizeof(uint64_t);
-		}
-		if (nr >= sizeof(int32_t)) {
-			crc = __crc32w(crc, *(uint32_t *)p);
-			p += sizeof(uint32_t);
-			nr -= sizeof(uint32_t);
-		}
-		if (nr >= sizeof(int16_t)) {
-			crc = __crc32h(crc, *(uint16_t *)p);
-			p += sizeof(uint16_t);
-			nr -= sizeof(uint16_t);
-		}
-		if (nr) {
-			crc = __crc32b(crc, *p);
-			p += sizeof(uint8_t);
-			nr -= sizeof(uint8_t);
-		}
+		crc = crc32_aarch64(crc, p, nr);
+		RETVAL_LONG(crc^0xFFFFFFFF);
 	}
 #endif
+
 	for (; nr--; ++p) {
 		crc = ((crc >> 8) & 0x00FFFFFF) ^ crc32tab[(crc ^ (*p)) & 0xFF ];
 	}
-- 
2.11.0