changes to pipeline prefetches for fft2d

diff --git a/Robust/src/Benchmarks/Prefetch/ManualPrefetch/2DFFT/fft2d.java b/Robust/src/Benchmarks/Prefetch/ManualPrefetch/2DFFT/fft2d.java
index 6f9195867e8194308937f62e2dc091236b10174a..ce15815c12abeaa5db55c6784a4140b314aac99f 100644 (file)
--- a/Robust/src/Benchmarks/Prefetch/ManualPrefetch/2DFFT/fft2d.java
+++ b/Robust/src/Benchmarks/Prefetch/ManualPrefetch/2DFFT/fft2d.java
@@ -65,7 +65,7 @@ public class fft2d extends Thread {
        //input of FFT
         if ((l&127)==0) {
            offsets2[0] = (short) l+x0; 
-           if ((x1-l-x0)<128) {
+           if ((l+x0+128)>= x1) {
                int t=x1-l-x0-1;
                if (t>0) {
                    offsets2[1] = (short) t;
@@ -109,20 +109,32 @@ public class fft2d extends Thread {
       Object o1 = data2.dataRe;
       short[] offsets1 = new short[2];
       offsets1[0] = (short) start;
-      offsets1[1] = (short) (start - end - 1);
+      offsets1[1] = (short) 127;
       System.rangePrefetch(o1, offsets1);
 
-      // prefetch data2.dataIm[start -> end]
-      
       o1 = data2.dataIm;
-      offsets1[0] = (short) start; 
-      offsets1[1] = (short) (start - end - 1);
       System.rangePrefetch(o1, offsets1);
       /////////////////////
 
       transtempRe = data2.dataRe;
       transtempIm = data2.dataIm;
-      for (int j = start; j < end; j++) {
+      int l=64;
+      for (int j = start; j < end; j++,l++) {
+         if ((l&127)==0) {
+             offsets1[0]=(short) (l+start);
+             if ((start+l+128)>=end) {
+                 int t=end-start-l-1;
+                 if (t>0) {
+                     offsets1[1]=(short)t;
+                     System.rangePrefetch(transtempRe, offsets1);
+                     System.rangePrefetch(transtempIm, offsets1);
+                 }
+             } else {
+                 offsets1[1]=(short) 127;
+                 System.rangePrefetch(transtempRe, offsets1);
+                 System.rangePrefetch(transtempIm, offsets1);
+             }
+         }
        //input of FFT
        double inputRe[] = transtempRe[j]; //local array
        double inputIm[] = transtempIm[j];