Revert of Reland "Integrate SIMD optimisations for zlib"

third_party/zlib/x86.c

Index: third_party/zlib/x86.c
diff --git a/third_party/zlib/x86.c b/third_party/zlib/x86.c
deleted file mode 100644
index 709b74e6d878b24b0c07f50d928f27e77eb49a76..0000000000000000000000000000000000000000
--- a/third_party/zlib/x86.c
+++ /dev/null
@@ -1,90 +0,0 @@
-/*
- * x86 feature check
- *
- * Copyright (C) 2013 Intel Corporation. All rights reserved.
- * Author:
- *  Jim Kukunas
- * 
- * For conditions of distribution and use, see copyright notice in zlib.h
- */
-
-#include "x86.h"
-
-int x86_cpu_enable_simd;
-
-#ifndef _MSC_VER
-#include <pthread.h>
-
-pthread_once_t cpu_check_inited_once = PTHREAD_ONCE_INIT;
-static void _x86_check_features(void);
-
-void x86_check_features(void)
-{
-  pthread_once(&cpu_check_inited_once, _x86_check_features);
-}
-
-static void _x86_check_features(void)
-{
-    int x86_cpu_has_sse2;
-    int x86_cpu_has_sse42;
-    int x86_cpu_has_pclmulqdq;
-    unsigned eax, ebx, ecx, edx;
-
-    eax = 1;
-#ifdef __i386__
-    __asm__ __volatile__ (
-        "xchg %%ebx, %1\n\t"
-        "cpuid\n\t"
-        "xchg %1, %%ebx\n\t"
-    : "+a" (eax), "=S" (ebx), "=c" (ecx), "=d" (edx)
-    );
-#else
-    __asm__ __volatile__ (
-        "cpuid\n\t"
-    : "+a" (eax), "=b" (ebx), "=c" (ecx), "=d" (edx)
-    );
-#endif  /* (__i386__) */
-
-    x86_cpu_has_sse2 = edx & 0x4000000;
-    x86_cpu_has_sse42 = ecx & 0x100000;
-    x86_cpu_has_pclmulqdq = ecx & 0x2;
-
-    x86_cpu_enable_simd = x86_cpu_has_sse2 &&
-                          x86_cpu_has_sse42 &&
-                          x86_cpu_has_pclmulqdq;
-}
-#else
-#include <intrin.h>
-#include <windows.h>
-
-static BOOL CALLBACK _x86_check_features(PINIT_ONCE once, PVOID param, PVOID *context);
-static INIT_ONCE cpu_check_inited_once = INIT_ONCE_STATIC_INIT;
-
-void x86_check_features(void)
-{
-#if (_WIN32_WINNT >= 0x0600)
-    InitOnceExecuteOnce(&cpu_check_inited_once, _x86_check_features, NULL, NULL);
-#endif  /* (_WIN32_WINNT >= 0x0600) */
-}
-
-#if (_WIN32_WINNT >= 0x0600)
-static BOOL CALLBACK _x86_check_features(PINIT_ONCE once, PVOID param, PVOID *context)
-{
-    int x86_cpu_has_sse2;
-    int x86_cpu_has_sse42;
-    int x86_cpu_has_pclmulqdq;
-    int regs[4];
-
-    __cpuid(regs, 1);
-
-    x86_cpu_has_sse2 = regs[3] & 0x4000000;
-    x86_cpu_has_sse42= regs[2] & 0x100000;
-    x86_cpu_has_pclmulqdq = regs[2] & 0x2;
-
-    x86_cpu_enable_simd = x86_cpu_has_sse2 &&
-                          x86_cpu_has_sse42 &&
-                          x86_cpu_has_pclmulqdq;
-    return TRUE;
-}
-#endif  /* (_WIN32_WINNT >= 0x0600) */
-#endif  /* _MSC_VER */