From: Alexander Kabaev <kan@fb.com>
Date: Tue, 28 Nov 2017 19:42:20 +0000 (-0800)
Subject: Unbreak folly on x86-32
X-Git-Tag: v2017.12.04.00~27
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=6e6f346d41a5b3e431093990db93db141838495f;p=folly.git

Unbreak folly on x86-32

Summary:
_mm_cvtsi64_si128 and _mm_cvtsi128_si64 intrinsics are available on
x86_64 only, so do not enable SSE instructions when compiling for 32 bits.

Reviewed By: yfeldblum

Differential Revision: D6422271

fbshipit-source-id: a3c5cf3f2ee4b47d5a1edcf93cfff3d1f3fe907e
---

diff --git a/folly/RWSpinLock.h b/folly/RWSpinLock.h
index 8edd6b32..94f48028 100644
--- a/folly/RWSpinLock.h
+++ b/folly/RWSpinLock.h
@@ -148,7 +148,7 @@ pthread_rwlock_t Read        728698     24us       101ns     7.28ms     194us
 #endif
 
 // iOS doesn't define _mm_cvtsi64_si128 and friends
-#if (FOLLY_SSE >= 2) && !FOLLY_MOBILE
+#if (FOLLY_SSE >= 2) && !FOLLY_MOBILE && FOLLY_X64
 #define RW_SPINLOCK_USE_SSE_INSTRUCTIONS_
 #else
 #undef RW_SPINLOCK_USE_SSE_INSTRUCTIONS_