Unify CPU features detection code
This will allow to remove some duplicated code (i.e. thread synchronization)
while at same time removing unnecessary use of inline ASM for Intel features
detection.
A few other advantages:
- remove some extra logic (e.g. no need to test the platform to include the
correct CPU detection header).
- simplifies the buildsystem (i.e. we always include cpu_features.c)
- get rid of the simd_stub file.
Bug: 1032721
Change-Id: I9427b34ec09dddc41925844a6ec4e6aa4d8f3207
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1987190
Reviewed-by: Mike Klein <mtklein@chromium.org>
Reviewed-by: Adenilson Cavalcanti <cavalcantii@chromium.org>
Commit-Queue: Adenilson Cavalcanti <cavalcantii@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#729515}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: d989ac2c596e88e7581eb93d053945a43c611124
diff --git a/cpu_features.h b/cpu_features.h
new file mode 100644
index 0000000..2a4a797
--- /dev/null
+++ b/cpu_features.h
@@ -0,0 +1,17 @@
+/* cpu_features.h -- Processor features detection.
+ *
+ * Copyright 2018 The Chromium Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the Chromium source repository LICENSE file.
+ */
+
+#include "zlib.h"
+
+/* TODO(cavalcantii): remove checks for x86_flags on deflate.
+ */
+extern int arm_cpu_enable_crc32;
+extern int arm_cpu_enable_pmull;
+extern int x86_cpu_enable_ssse3;
+extern int x86_cpu_enable_simd;
+
+void cpu_check_features(void);