commit a5cb76bca00b1ce44a04687fb179809c12ea9cd3
author David 'Digit' Turner <digit@google.com> Wed Dec 14 18:23:40 2011 +0100
committer David 'Digit' Turner <digit@google.com> Wed Dec 14 18:23:40 2011 +0100
tree 16c42ffde3fc4b588418501465d6d1c18702395c
parent f6aa779383f5f5e61969a2b4fdb8bf435c5194b1

libc: x86: Use SSE2 or SSSE3 optimized routines when possible.

This patch uses the new hardware feature macros for x86 to define
various compile-time macros used to make the C library use
SSE2 and/or SSSE3 optimized memory functions for target CPUs
that support these features.

Note that previously, we relied on the macros being defined by
build/core/combo/TARGET_linux-x86.mk, but this is no longer the
case.

Change-Id: Ieae5ff5284c0c839bc920953fb6b91d2f2633afc

libc/Android.mk

diff --git a/libc/Android.mk b/libc/Android.mk
index caeab8c..5d851df 100644
--- a/libc/Android.mk
+++ b/libc/Android.mk
@@ -513,7 +513,12 @@
 else # !arm
   ifeq ($(TARGET_ARCH),x86)
     libc_crt_target_cflags :=
-    # TARGET_GLOBAL_CFLAGS from build/core/combo/TARGET_linux-x86.mk sets all required flags.
+    ifeq ($(ARCH_X86_HAVE_SSE2),true)
+        libc_crt_target_cflags += -DUSE_SSE2=1
+    endif
+    ifeq ($(ARCH_X86_HAVE_SSSE3),true)
+        libc_crt_target_cflags += -DUSE_SSSE3=1
+    endif
   endif # x86
 endif # !arm