This patch simply flips on the _USE_SSE/_USE_SSE2 automatically if the visual

[speexdsp.git] / win32 / config.h

diff --git a/win32/config.h b/win32/config.h
index e79c4c2..6366d7b 100644 (file)
--- a/win32/config.h
+++ b/win32/config.h
@@ -1,6 +1,17 @@
 // Microsoft version of 'inline'\r
 #define inline __inline\r
 \r
+// In Visual Studio, _M_IX86_FP=1 means /arch:SSE was used, likewise\r
+// _M_IX86_FP=2 means /arch:SSE2 was used.\r
+// Also, enable both _USE_SSE and _USE_SSE2 if we're compiling for x86-64\r
+#if _M_IX86_FP >= 1 || defined(_M_X64)\r
+#define _USE_SSE\r
+#endif\r
+\r
+#if _M_IX86_FP >= 2 || defined(_M_X64)\r
+#define _USE_SSE2\r
+#endif\r
+\r
 // Visual Studio support alloca(), but it always align variables to 16-bit\r
 // boundary, while SSE need 128-bit alignment. So we disable alloca() when\r
 // SSE is enabled.\r