deps: update zlib to 1.3.0.1-motley-209717d

deps/zlib/BUILD.gn

@@ -151,7 +151,13 @@ if (use_arm_neon_optimizations) {
     if (!is_win && !is_clang) {
       assert(!use_thin_lto,
              "ThinLTO fails mixing different module-level targets")
-      cflags_c = [ "-march=armv8-a+aes+crc" ]
+      if (current_cpu == "arm64") {
+        cflags_c = [ "-march=armv8-a+aes+crc" ]
+      } else if (current_cpu == "arm") {
+        cflags_c = [ "-march=armv8-a+crc" ]
+      } else {
+        assert(false, "Unexpected cpu: $current_cpu")
+      }
     }
 
     sources = [
@@ -478,9 +484,7 @@ if (!is_win || target_os != "winuwp") {
     sources = [ "contrib/minizip/minizip.c" ]
 
     if (is_clang) {
-      cflags = [
-        "-Wno-incompatible-pointer-types-discards-qualifiers",
-      ]
+      cflags = [ "-Wno-incompatible-pointer-types-discards-qualifiers" ]
     }
 
     if (!is_debug) {
@@ -500,9 +504,7 @@ if (!is_win || target_os != "winuwp") {
     sources = [ "contrib/minizip/miniunz.c" ]
 
     if (is_clang) {
-      cflags = [
-        "-Wno-incompatible-pointer-types-discards-qualifiers",
-      ]
+      cflags = [ "-Wno-incompatible-pointer-types-discards-qualifiers" ]
     }
 
     if (!is_debug) {

deps/zlib/crc32.c

@@ -700,24 +700,29 @@ local z_word_t crc_word_big(z_word_t data) {
 /* ========================================================================= */
 unsigned long ZEXPORT crc32_z(unsigned long crc, const unsigned char FAR *buf,
                               z_size_t len) {
+
+    /* If no optimizations are enabled, do it as canonical zlib. */
+#if !defined(CRC32_SIMD_SSE42_PCLMUL) && !defined(CRC32_ARMV8_CRC32) && \
+    !defined(RISCV_RVV) && !defined(CRC32_SIMD_AVX512_PCLMUL)
+    if (buf == Z_NULL) {
+        return 0UL;
+    }
+#else
     /*
      * zlib convention is to call crc32(0, NULL, 0); before making
      * calls to crc32(). So this is a good, early (and infrequent)
      * place to cache CPU features if needed for those later, more
      * interesting crc32() calls.
      */
-#if defined(CRC32_SIMD_SSE42_PCLMUL) || defined(CRC32_ARMV8_CRC32) \
-    || defined(RISCV_RVV)
-    /*
-     * Since this routine can be freely used, check CPU features here.
-     */
     if (buf == Z_NULL) {
-        if (!len) /* Assume user is calling crc32(0, NULL, 0); */
+        if (!len)
             cpu_check_features();
         return 0UL;
     }
-
 #endif
+    /* If AVX-512 is enabled, we will use it for longer inputs and fallback
+     * to SSE4.2 and eventually the portable implementation to handle the tail.
+     */
 #if defined(CRC32_SIMD_AVX512_PCLMUL)
     if (x86_cpu_enable_avx512 && len >= Z_CRC32_AVX512_MINIMUM_LENGTH) {
         /* crc32 64-byte chunks */
@@ -730,7 +735,8 @@ unsigned long ZEXPORT crc32_z(unsigned long crc, const unsigned char FAR *buf,
         /* Fall into the default crc32 for the remaining data. */
         buf += chunk_size;
     }
-#elif defined(CRC32_SIMD_SSE42_PCLMUL)
+#endif
+#if defined(CRC32_SIMD_SSE42_PCLMUL)
     if (x86_cpu_enable_simd && len >= Z_CRC32_SSE42_MINIMUM_LENGTH) {
         /* crc32 16-byte chunks */
         z_size_t chunk_size = len & ~Z_CRC32_SSE42_CHUNKSIZE_MASK;
@@ -758,11 +764,8 @@ unsigned long ZEXPORT crc32_z(unsigned long crc, const unsigned char FAR *buf,
             buf += chunk_size;
         }
 #endif
-        return armv8_crc32_little(buf, len, crc); /* Armv8@32bit or tail. */
-    }
-#else
-    if (buf == Z_NULL) {
-        return 0UL;
+        /* This is scalar and self contained, used on Armv8@32bit or tail. */
+        return armv8_crc32_little(buf, len, crc);
     }
 #endif /* CRC32_SIMD */
 

deps/zlib/crc32_simd.c

@@ -200,7 +200,8 @@ uint32_t ZLIB_INTERNAL crc32_avx512_simd_(  /* AVX512+PCLMUL */
     return _mm_extract_epi32(a1, 1);
 }
 
-#elif defined(CRC32_SIMD_SSE42_PCLMUL)
+#endif
+#if defined(CRC32_SIMD_SSE42_PCLMUL)
 
 /*
  * crc32_sse42_simd_(): compute the crc32 of the buffer, where the buffer

src/zlib_version.h

@@ -2,5 +2,5 @@
 // Refer to tools/dep_updaters/update-zlib.sh
 #ifndef SRC_ZLIB_VERSION_H_
 #define SRC_ZLIB_VERSION_H_
-#define ZLIB_VERSION "1.3.0.1-motley-4f653ff"
+#define ZLIB_VERSION "1.3.0.1-motley-209717d"
 #endif  // SRC_ZLIB_VERSION_H_