Added SSE2 support.

test cases/common/139 simd/meson.build

@@ -17,7 +17,6 @@ cdata = configuration_data()
 # and then have a target that uses the result in links_with.
 
 # The following headers need to be added. Also Thumb and Altivec.
-#<emmintrin.h> SSE2
 #<pmmintrin.h> SSE3
 #<tmmintrin.h> SSSE3
 #<smmintrin.h> SSE4.1
@@ -29,15 +28,21 @@ cdata = configuration_data()
 
 simdlibs = []
 
-if cc.has_argument('-mmmx')
-  cdata.set('HAVE_MMX', 1)
-  simdlibs += static_library('simd_mmx', 'simd_mmx.c', c_args : '-mmmx')
-endif
-
-if cc.has_argument('-msse')
-  cdata.set('HAVE_SSE', 1)
-  simdlibs += static_library('simd_sse', 'simd_sse.c', c_args : '-msse')
-endif
+simdarr = [['-mmx', 'HAVE_MMX', 'simd_mmx', 'simd_mmx.c'],
+ ['-msse', 'HAVE_SSE', 'simd_sse', 'simd_sse.c'],
+ ['-msse2', 'HAVE_SSE2', 'simd_sse2', 'simd_sse2.c'],
+]
+
+foreach ia : simdarr
+  arg = ia[0]
+  def = ia[1]
+  libname = ia[2]
+  filename = ia[3]
+  if cc.has_argument(arg)
+    cdata.set(def, 1)
+    simdlibs += static_library(libname, filename, c_args : arg)
+  endif
+endforeach
 
 configure_file(output : 'simdconfig.h',
   configuration : cdata)

test cases/common/139 simd/simd_sse2.c

@@ -0,0 +1,25 @@
+#include<simdconfig.h>
+#include<simdfuncs.h>
+
+#include<emmintrin.h>
+#include<cpuid.h>
+#include<stdint.h>
+
+int sse2_available() {
+    return __builtin_cpu_supports("sse2");
+}
+
+void increment_sse2(float arr[4]) {
+    double darr[4];
+    __m128d val1 = _mm_set_pd(arr[0], arr[1]);
+    __m128d val2 = _mm_set_pd(arr[2], arr[3]);
+    __m128d one = _mm_set_pd1(1.0);
+    __m128d result = _mm_add_pd(val1, one);
+    _mm_store_pd(darr, result);
+    result = _mm_add_pd(val2, one);
+    _mm_store_pd(&darr[2], result);
+    arr[0] = (float)darr[1];
+    arr[1] = (float)darr[0];
+    arr[2] = (float)darr[3];
+    arr[3] = (float)darr[2];
+}

test cases/common/139 simd/simdchecker.c

@@ -17,6 +17,12 @@ int main(int argc, char **argv) {
 /* Add here. The first matched one is used so put "better" instruction
  * sets at the top.
  */
+#if HAVE_SSE2
+    if(fptr == NULL && sse2_available()) {
+        fptr = increment_sse2;
+        type = "SSE2";
+    }
+#endif
 #if HAVE_SSE
     if(fptr == NULL && sse_available()) {
         fptr = increment_sse;