add simple avx test

Change-Id: Ia17524929672b420e20d9b491fdafd21cc5a928f
Reviewed-on: https://review.haiku-os.org/c/haiku/+/2850
Reviewed-by: waddlesplash <[email protected]>

src/tests/system/kernel/Jamfile

@@ -13,6 +13,11 @@ SimpleTest fibo_exec : fibo_exec.cpp ;
 
 SimpleTest fifo_poll_test : fifo_poll_test.cpp ;
 
+SimpleTest hello_avx : hello_avx.c ;
+local avxSource = [ FGristFiles hello_avx.c ] ;
+local avxObject = $(avxSource:S=$(SUFOBJ)) ;
+CCFLAGS on $(avxObject) = -mavx ;
+
 SimpleTest live_query :
 	live_query.cpp
 	: be

src/tests/system/kernel/hello_avx.c

@@ -0,0 +1,25 @@
+/*
+ * https://www.codeproject.com/Articles/874396/Crunching-Numbers-with-AVX-and-AVX
+ * 2016, Matt Scarpino, released under the Code Project Open License
+ * https://www.codeproject.com/info/cpol10.aspx
+ */
+
+#include <immintrin.h>
+#include <stdio.h>
+
+int main() {
+
+  /* Initialize the two argument vectors */
+  __m256 evens = _mm256_set_ps(2.0, 4.0, 6.0, 8.0, 10.0, 12.0, 14.0, 16.0);
+  __m256 odds = _mm256_set_ps(1.0, 3.0, 5.0, 7.0, 9.0, 11.0, 13.0, 15.0);
+
+  /* Compute the difference between the two vectors */
+  __m256 result = _mm256_sub_ps(evens, odds);
+
+  /* Display the elements of the result vector */
+  float* f = (float*)&result;
+  printf("%f %f %f %f %f %f %f %f\n",
+    f[0], f[1], f[2], f[3], f[4], f[5], f[6], f[7]);
+
+  return 0;
+}