diff --git a/fftw.spec b/fftw.spec
index c8cc140..8b3735f 100644
--- a/fftw.spec
+++ b/fftw.spec
@@ -1,6 +1,6 @@
 Name:           fftw
 Version:        3.3.3
-Release:        2%{?dist}
+Release:        3%{?dist}
 Summary:        A Fast Fourier Transform library
 Group:          System Environment/Libraries
 License:        GPLv2+
@@ -166,13 +166,28 @@ prec_flags[1]=--enable-double
 prec_flags[2]=--enable-long-double
 prec_flags[3]=--enable-quad-precision
 
-%ifarch x86_64
-# x86_64 always has SSE2, enable it for single and double
+%ifarch %{x86} x86_64
+# Enable SSE2 support for x86 and x86_64
+# (no avx as it is claimed to drastically slower)
 for((i=0;i<2;i++)); do
  prec_flags[i]+=" --enable-sse2"
 done
 %endif
 
+%ifarch arm
+# Compile support for NEON instructions
+for((i=0;i<2;i++)); do
+ prec_flags[i]+=" --enable-neon"
+done
+%endif
+
+%ifarch ppc ppc64
+# Compile support for Altivec instructions
+for((i=0;i<2;i++)); do
+ prec_flags[i]+=" --enable-altivec"
+done
+%endif
+
 # Loop over precisions
 %if %{quad}
 for((iprec=0;iprec<4;iprec++))
@@ -300,6 +315,10 @@ fi
 %{_libdir}/libfftw3*.a
 
 %changelog
+* Tue Dec 18 2012 Susi Lehtola <jussilehtola@fedoraproject.org> - 3.3.3-3
+- After consultation with upstream, enable SSE2 also on x86, altivec on ppc
+  and ppc64 and NEON on arm.
+
 * Tue Dec 18 2012 Susi Lehtola <jussilehtola@fedoraproject.org> - 3.3.3-2
 - Enable SSE2 on x86_64.