Support avx512f + vpclmulqdq crc32() acceleration

Cosmo's _Cz_crc32() function now goes 73 GiB/s on Threadripper. This
will significantly improve the performance of the PKZIP file format.
This algorithm is also used by apelink, to create deterministic ids.

third_party/zlib/BUILD.mk

@@ -38,16 +38,31 @@ $(THIRD_PARTY_ZLIB_A).pkg:				\
 ifeq ($(ARCH), x86_64)
 o/$(MODE)/third_party/zlib/adler32_simd.o: private	\
 		TARGET_ARCH +=				\
+			-O3				\
 			-mssse3
 o/$(MODE)/third_party/zlib/crc_folding.o		\
-o/$(MODE)/third_party/zlib/crc32_simd.o: private	\
+o/$(MODE)/third_party/zlib/crc32_simd_sse42.o: private	\
 		TARGET_ARCH +=				\
+			-O3				\
 			-msse4.2			\
-			-mpclmul
+			-mpclmul			\
+			-UCRC32_SIMD_AVX512_PCLMUL	\
+			-DCRC32_SIMD_SSE42_PCLMUL	\
+			-DBUILD_SSE42
+o/$(MODE)/third_party/zlib/crc32_simd_avx512.o: private	\
+		TARGET_ARCH +=				\
+			-O3				\
+			-mpclmul			\
+			-mavx512f			\
+			-mvpclmulqdq			\
+			-UCRC32_SIMD_SSE42_PCLMUL	\
+			-DCRC32_SIMD_AVX512_PCLMUL	\
+			-DBUILD_AVX512
 $(THIRD_PARTY_ZLIB_A_OBJS): private			\
 		CPPFLAGS +=				\
 			-DADLER32_SIMD_SSSE3		\
 			-DCRC32_SIMD_SSE42_PCLMUL	\
+			-DCRC32_SIMD_AVX512_PCLMUL	\
 			-DDEFLATE_SLIDE_HASH_SSE2	\
 			-DINFLATE_CHUNK_SIMD_SSE2	\
 			-DINFLATE_CHUNK_READ_64LE
@@ -55,8 +70,10 @@ endif
 
 ifeq ($(ARCH), aarch64)
 o/$(MODE)/third_party/zlib/deflate.o			\
-o/$(MODE)/third_party/zlib/crc32_simd.o: private	\
+o/$(MODE)/third_party/zlib/crc32_simd_neon.o: private	\
 		TARGET_ARCH +=				\
+			-O3				\
+			-DBUILD_NEON			\
 			-march=armv8-a+aes+crc
 $(THIRD_PARTY_ZLIB_A_OBJS): private			\
 		CPPFLAGS +=				\

third_party/zlib/cpu_features.internal.h

@@ -16,7 +16,7 @@ COSMOPOLITAN_C_START_
 #define x86_cpu_enable_sse2   X86_HAVE(SSE2)
 #define x86_cpu_enable_ssse3  X86_HAVE(SSSE3)
 #define x86_cpu_enable_simd   (X86_HAVE(SSE4_2) && X86_HAVE(PCLMUL))
-#define x86_cpu_enable_avx512 X86_HAVE(AVX512F)
+#define x86_cpu_enable_avx512 (X86_HAVE(AVX512F) && X86_HAVE(PCLMUL) && X86_HAVE(VPCLMULQDQ))
 #define cpu_check_features()  ((void)0)
 
 #elif defined(__aarch64__)

third_party/zlib/crc32.c

@@ -780,6 +780,7 @@ uint32_t ZEXPORT crc32_z(crc, buf_, len)
     }
 
 #endif
+#if defined(__x86_64__)
 #if defined(CRC32_SIMD_AVX512_PCLMUL)
     if (x86_cpu_enable_avx512 && len >= Z_CRC32_AVX512_MINIMUM_LENGTH) {
         /* crc32 64-byte chunks */
@@ -792,7 +793,8 @@ uint32_t ZEXPORT crc32_z(crc, buf_, len)
         /* 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;
@@ -804,6 +806,7 @@ uint32_t ZEXPORT crc32_z(crc, buf_, len)
         /* Fall into the default crc32 for the remaining data. */
         buf += chunk_size;
     }
+#endif
 #elif defined(CRC32_ARMV8_CRC32)
     if (arm_cpu_enable_crc32) {
 #if defined(__aarch64__)

third_party/zlib/crc32_simd_avx512.c

@@ -0,0 +1,3 @@
+#ifdef BUILD_AVX512
+#include "third_party/zlib/crc32_simd.inc"
+#endif

third_party/zlib/crc32_simd_neon.c

@@ -0,0 +1,3 @@
+#ifdef BUILD_NEON
+#include "third_party/zlib/crc32_simd.inc"
+#endif

third_party/zlib/crc32_simd_sse42.c

@@ -0,0 +1,3 @@
+#ifdef BUILD_SSE42
+#include "third_party/zlib/crc32_simd.inc"
+#endif