Add VPX_SWAP macro

Change-Id: I60e233eddef238ad918183392794084673f27d2d

diff --git a/vpx_dsp/vpx_dsp_common.h b/vpx_dsp/vpx_dsp_common.h
index a1d0a51ef565ff84f4abc2b42694cfb5d8b0bfa4..8d4f514182a4b675490e147758083a98a9a0d017 100644 (file)
--- a/vpx_dsp/vpx_dsp_common.h
+++ b/vpx_dsp/vpx_dsp_common.h
@@ -22,6 +22,13 @@ extern "C" {
 #define VPXMIN(x, y) (((x) < (y)) ? (x) : (y))
 #define VPXMAX(x, y) (((x) > (y)) ? (x) : (y))
 
+#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.