diff --git a/mt_instructionrate/Makefile b/mt_instructionrate/Makefile
index 6f083d0..d24b4d6 100644
--- a/mt_instructionrate/Makefile
+++ b/mt_instructionrate/Makefile
@@ -1,2 +1,4 @@
+x86:
+	gcc -pthread mt_instructionrate.c x86_mt_instructionrate.s ../Common/timing.c -o x86_mt_instructionrate
 aarch64:
 	gcc -pthread mt_instructionrate.c arm_mt_instructionrate.s ../Common/timing.c -o arm_mt_instructionrate
diff --git a/mt_instructionrate/mt_instructionrate.c b/mt_instructionrate/mt_instructionrate.c
index 73f2848..ac1f0ac 100644
--- a/mt_instructionrate/mt_instructionrate.c
+++ b/mt_instructionrate/mt_instructionrate.c
@@ -5,18 +5,22 @@
 #include <math.h>
 #include <string.h>
 #include <pthread.h>
+#include <unistd.h>
+#include <sys/syscall.h>
 
 #include "../Common/timing.h"
 
+#define gettid() ((pid_t)syscall(SYS_gettid))
+
 struct TestThreadData {
     float timeMs;  // written by thread to indicate elapsed runtime for that thread
     uint64_t iterations;
     void *testData;
     int core;     // -1 = don't set affinity. otherwise set affinity to specified core
-    uint64_t (*testfunc)(uint64_t, void *);
+    uint64_t (*testfunc)(uint64_t, void *) __attribute__((ms_abi));
 };
 
-float measureFunction(uint64_t baseIterations, uint64_t (*testFunc)(uint64_t, void *), void *data);
+float measureFunction(uint64_t baseIterations, uint64_t (*testFunc)(uint64_t, void *) __attribute((ms_abi)), void *data);
 void *TestThread(void *param);
 
 int threadCount = 1;
@@ -26,6 +30,10 @@ int *coreList = NULL;
 #include "arm_mt_instructionrate.c"
 #endif 
 
+#ifdef __x86_64
+#include "x86_mt_instructionrate.c"
+#endif
+
 int main(int argc, char *argv[]) {
    char parseBuffer[512];
    int parseIndices[64];
@@ -75,7 +83,7 @@ int main(int argc, char *argv[]) {
 
 // return billion operations per second
 // test function must perform iterations ops
-float measureFunction(uint64_t baseIterations, uint64_t (*testFunc)(uint64_t, void *), void *data){
+float measureFunction(uint64_t baseIterations, uint64_t (*testFunc)(uint64_t, void *) __attribute__((ms_abi)), void *data){
   int toleranceMet = 0, minTimeMet = 0;
   unsigned int timeMs;
   pthread_t *testThreads = (pthread_t *)malloc(threadCount * sizeof(pthread_t));
diff --git a/mt_instructionrate/x86_mt_instructionrate b/mt_instructionrate/x86_mt_instructionrate
new file mode 100755
index 0000000..24316df
Binary files /dev/null and b/mt_instructionrate/x86_mt_instructionrate differ
diff --git a/mt_instructionrate/x86_mt_instructionrate.c b/mt_instructionrate/x86_mt_instructionrate.c
new file mode 100644
index 0000000..2847538
--- /dev/null
+++ b/mt_instructionrate/x86_mt_instructionrate.c
@@ -0,0 +1,22 @@
+extern uint64_t sse_int32_add_test(uint64_t iterations, void *data) __attribute((ms_abi));
+
+void RunTests() {
+  uint64_t iterations = 5500000000;
+  int testDataLength = 256; 
+  uint32_t *intTestArr = (uint32_t *)malloc(sizeof(uint32_t) * testDataLength);
+  uint32_t *fpTestArr = (uint32_t *)malloc(sizeof(uint32_t) * testDataLength);
+  for (int i = 0; i < testDataLength; i++) {
+    intTestArr[i] = i;
+    fpTestArr[i] = i * 1.2f;
+  }
+
+  fprintf(stderr, "Measuring INT32 adds with SSE\n");
+  float sseInt32Adds = measureFunction(iterations, sse_int32_add_test, intTestArr);
+
+  printf("-----GOPS/s-----\n");
+  printf("SSE INT32 Adds: %f\n", sseInt32Adds);
+  
+  free(intTestArr);
+  free(fpTestArr);
+  return;
+}
diff --git a/mt_instructionrate/x86_mt_instructionrate.s b/mt_instructionrate/x86_mt_instructionrate.s
new file mode 100644
index 0000000..6b075b7
--- /dev/null
+++ b/mt_instructionrate/x86_mt_instructionrate.s
@@ -0,0 +1,23 @@
+.text
+
+.global sse_int32_add_test
+
+/* rcx = iteration count, rdx = data */
+sse_int32_add_test:
+  movups (%rdx), %xmm0
+  movups 16(%rdx), %xmm1
+  movups 32(%rdx), %xmm2
+  movups 48(%rdx), %xmm3
+  movups 64(%rdx), %xmm4
+  movups 72(%rdx), %xmm5
+sse_int32_add_test_loop:
+  paddd %xmm0, %xmm0
+  paddd %xmm1, %xmm1
+  paddd %xmm2, %xmm2
+  paddd %xmm3, %xmm3
+  paddd %xmm4, %xmm4
+  paddd %xmm5, %xmm5
+  sub $24, %rcx
+  cmp $0, %rcx
+  jg sse_int32_add_test_loop
+  ret