rudimentary ARM support

Makefile

@@ -71,6 +71,11 @@ linux: ALL_CXXFLAGS += $(OPT_FLAGS) -fpic
 linux: VST_FLAGS += -D__cdecl=
 linux: all
 
+linux-arm: ALL_CFLAGS += -Ofast -mfpu=neon -fpic
+linux-arm: ALL_CXXFLAGS += -Ofast -mfpu=neon -fpic
+linux-arm: VST_FLAGS += -D__cdecl=
+linux-arm: all
+
 options:
 	@echo "CPPFLAGS       = $(CPPFLAGS)"
 	@echo "ALL_CFLAGS     = $(ALL_CFLAGS)"
@@ -85,7 +90,7 @@ ladspa: $(LADSPA_SHOBJ)
 
 vst: $(VST_SHOBJ)
 
-pretest: util/sse_test.h
+pretest: util/denorm_test.h
 	@$(CC) -E $(ALL_CFLAGS) $^ -o /dev/null
 
 benchmark: $(BIN)/bench $(AGAINST)

README.md

@@ -49,6 +49,8 @@ experimentation with delay compensation and EQ oversampling, not for use.
 `make linux` or `make windows` (works well with [mxe])
 [mxe]: //mxe.cc
 
+`make linux-arm` requires a CPU with a NEON unit
+
 remember to export `VST_SDK_DIR` to the path of your `vstsdk2.4/`
 
 other targets:
@@ -58,7 +60,6 @@ other targets:
 
 ## TODO
 
-* ARM support
 * spaces-in-paths support in Makefile
 * rename plugins (fix capitalization consistency and such)
 * reduce input/output buffers on biquads (shared)

util/denorm_test.h

@@ -0,0 +1,17 @@
+#ifndef __arm__
+ #ifdef __SSE2__
+  #ifndef __SSE2_MATH__
+   #warning SSE2 enabled but not forced, beware denormals
+  #endif
+ #else
+  #warning built without SSE2, denormals will be painful
+ #endif
+#else
+ #ifndef __ARM_NEON__
+  #warning built without NEON, denormals will be painful
+ #else
+  #ifndef __FAST_MATH__
+   #warning NEON enabled but not forced, beware denormals
+  #endif
+ #endif
+#endif

util/sse_test.h

@@ -1,7 +0,0 @@
-#ifdef __SSE2__
-#ifndef __SSE2_MATH__
-#warning SSE2 enabled but not forced, beware denormals
-#endif
-#else
-#warning built without SSE2, denormals will be painful
-#endif