Merge branch 'master-use-sse3' into 'master'

Use SSE3 in 32-bit x86 binaries

See merge request STJr/SRB2!1213

src/CMakeLists.txt

@@ -549,6 +549,7 @@ if(${SRB2_CONFIG_USEASM})
 	endif()
 	set(SRB2_USEASM ON)
 	add_definitions(-DUSEASM)
+	set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -msse3 -mfpmath=sse")
 else()
 	set(SRB2_USEASM OFF)
 	add_definitions(-DNONX86 -DNORUSEASM)

src/Makefile

@@ -277,7 +277,7 @@ OPTS += -DCOMPVERSION
 
 ifndef NONX86
 ifndef GCC29
-	ARCHOPTS?=-march=pentium
+	ARCHOPTS?=-msse3 -mfpmath=sse
 else
 	ARCHOPTS?=-mpentium
 endif