From: Yury Gitman <yuryg@google.com>
Date: Fri, 15 Jul 2016 17:32:04 +0000 (-0700)
Subject: Add VPX_SWAP macro
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=a8de3c0c8935b090d205644a1e84b65a7d632d03;p=libvpx

Add VPX_SWAP macro

Change-Id: I60e233eddef238ad918183392794084673f27d2d
---

diff --git a/vpx_dsp/vpx_dsp_common.h b/vpx_dsp/vpx_dsp_common.h
index 82bafb5c4..4648c34e5 100644
--- a/vpx_dsp/vpx_dsp_common.h
+++ b/vpx_dsp/vpx_dsp_common.h
@@ -46,6 +46,13 @@ extern "C" {
 # define UNLIKELY(v)  (v)
 #endif
 
+#define VPX_SWAP(type, a, b) \
+  do {                       \
+    type c = (b);            \
+    b = a;                   \
+    a = c;                   \
+  } while (0)
+
 #if CONFIG_VP9_HIGHBITDEPTH
 // Note:
 // tran_low_t  is the datatype used for final transform coefficients.