[Library] Update zlibng (#1255)

* Update zlibng * Set cmake path more directly in zlibng to hopefully fix an issue with the build on drone * I'm dumb, missing / in path * Mackal helps with a dumb gitignore issue * Adding all the files, not sure what's ignoring them and im tired of looking * Some tweaks to zlibng build to hopefully get it to build properly. works on msvc now
2026-06-28 00:57:15 +00:00 · 2021-02-23 17:00:26 -08:00
parent e6dee96266
commit 2957f5084d
184 changed files with 21431 additions and 11703 deletions
@@ -0,0 +1,67 @@
+/* compare258_avx.c -- AVX2 version of compare258
+ * Copyright Mika T. Lindqvist  <postmaster@raasu.org>
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+#include "../../zbuild.h"
+#include "../../zutil.h"
+
+#include "fallback_builtins.h"
+
+#if defined(X86_AVX2) && defined(HAVE_BUILTIN_CTZ)
+
+#include <immintrin.h>
+#ifdef _MSC_VER
+#  include <nmmintrin.h>
+#endif
+
+/* UNALIGNED_OK, AVX2 intrinsic comparison */
+static inline uint32_t compare256_unaligned_avx2_static(const unsigned char *src0, const unsigned char *src1) {
+    uint32_t len = 0;
+
+    do {
+        __m256i ymm_src0, ymm_src1, ymm_cmp;
+        ymm_src0 = _mm256_loadu_si256((__m256i*)src0);
+        ymm_src1 = _mm256_loadu_si256((__m256i*)src1);
+        ymm_cmp = _mm256_cmpeq_epi8(ymm_src0, ymm_src1); /* non-identical bytes = 00, identical bytes = FF */
+        unsigned mask = (unsigned)_mm256_movemask_epi8(ymm_cmp);
+        if (mask != 0xFFFFFFFF) {
+            uint32_t match_byte = (uint32_t)__builtin_ctz(~mask); /* Invert bits so identical = 0 */
+            return len + match_byte;
+        }
+
+        src0 += 32, src1 += 32, len += 32;
+
+        ymm_src0 = _mm256_loadu_si256((__m256i*)src0);
+        ymm_src1 = _mm256_loadu_si256((__m256i*)src1);
+        ymm_cmp = _mm256_cmpeq_epi8(ymm_src0, ymm_src1);
+        mask = (unsigned)_mm256_movemask_epi8(ymm_cmp);
+        if (mask != 0xFFFFFFFF) {
+            uint32_t match_byte = (uint32_t)__builtin_ctz(~mask);
+            return len + match_byte;
+        }
+
+        src0 += 32, src1 += 32, len += 32;
+    } while (len < 256);
+
+    return 256;
+}
+
+static inline uint32_t compare258_unaligned_avx2_static(const unsigned char *src0, const unsigned char *src1) {
+    if (*(uint16_t *)src0 != *(uint16_t *)src1)
+        return (*src0 == *src1);
+
+    return compare256_unaligned_avx2_static(src0+2, src1+2) + 2;
+}
+
+Z_INTERNAL uint32_t compare258_unaligned_avx2(const unsigned char *src0, const unsigned char *src1) {
+    return compare258_unaligned_avx2_static(src0, src1);
+}
+
+#define LONGEST_MATCH   longest_match_unaligned_avx2
+#define COMPARE256      compare256_unaligned_avx2_static
+#define COMPARE258      compare258_unaligned_avx2_static
+
+#include "match_tpl.h"
+
+#endif