Diff: whetstone.cpp

Revision:

0:525baf7de2db

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/whetstone.cpp	Mon Apr 28 00:38:52 2014 +0000
@@ -0,0 +1,449 @@
+#include "benchmark.h"
+#include "mbed.h"
+Serial pc(SERIAL_TX, SERIAL_RX);
+
+
+//Source: http://www.netlib.org/benchmark/whetstonec
+/*
+ * C Converted Whetstone Double Precision Benchmark
+ *      Version 1.2 22 March 1998
+ *
+ *  (c) Copyright 1998 Painter Engineering, Inc.
+ *      All Rights Reserved.
+ *
+ *      Permission is granted to use, duplicate, and
+ *      publish this text and program as long as it
+ *      includes this entire comment block and limited
+ *      rights reference.
+ *
+ * Converted by Rich Painter, Painter Engineering, Inc. based on the
+ * www.netlib.org benchmark/whetstoned version obtained 16 March 1998.
+ *
+ * A novel approach was used here to keep the look and feel of the
+ * FORTRAN version.  Altering the FORTRAN-based array indices,
+ * starting at element 1, to start at element 0 for C, would require
+ * numerous changes, including decrementing the variable indices by 1.
+ * Instead, the array E1[] was declared 1 element larger in C.  This
+ * allows the FORTRAN index range to function without any literal or
+ * variable indices changes.  The array element E1[0] is simply never
+ * used and does not alter the benchmark results.
+ *
+ * The major FORTRAN comment blocks were retained to minimize
+ * differences between versions.  Modules N5 and N12, like in the
+ * FORTRAN version, have been eliminated here.
+ *
+ * An optional command-line argument has been provided [-c] to
+ * offer continuous repetition of the entire benchmark.
+ * An optional argument for setting an alternate LOOP count is also
+ * provided.  Define PRINTOUT to cause the POUT() function to print
+ * outputs at various stages.  Final timing measurements should be
+ * made with the PRINTOUT undefined.
+ *
+ * Questions and comments may be directed to the author at
+ *          r.painter@ieee.org
+ */
+/*
+C**********************************************************************
+C     Benchmark #2 -- Double  Precision Whetstone (A001)
+C
+C     o This is a REAL*8 version of
+C   the Whetstone benchmark program.
+C
+C     o DO-loop semantics are ANSI-66 compatible.
+C
+C     o Final measurements are to be made with all
+C   WRITE statements and FORMAT sttements removed.
+C
+C**********************************************************************   
+*/
+
+
+ 
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <math.h>
+/* the following is optional depending on the timing function used */
+#include <time.h>
+
+/* map the FORTRAN math functions, etc. to the C versions */
+#define DSIN    sin
+#define DCOS    cos
+#define DATAN   atan
+#define DLOG    log
+#define DEXP    exp
+#define DSQRT   sqrt
+#define IF      if
+
+/* function prototypes */
+void POUT(long N, long J, long K, double X1, double X2, double X3, double X4);
+void PA(double E[]);
+void P0(void);
+void P3(double X, double Y, double *Z);
+#define USAGE   "usage: whetdc [-c] [loops]\n"
+
+/*
+    COMMON T,T1,T2,E1(4),J,K,L
+*/
+double T,T1,T2,E1[5];
+int J,K,L;
+
+int argc=0;//Mod for nucleo. Change in code below if you want non-default loop count
+
+
+int
+whetstone(int argc)
+{
+    pc.printf("Beginning Whetstone benchmark at ");
+    if(argc==0)
+        pc.printf("default speed ...\n");
+    else
+        pc.printf("84 MHz ...\n");
+    /* used in the FORTRAN version */
+    long I;
+    long N1, N2, N3, N4, N6, N7, N8, N9, N10, N11;
+    double X1,X2,X3,X4,X,Y,Z;
+    long LOOP;
+    int II, JJ;
+
+    /* added for this version */
+    long loopstart;
+    long startsec, finisec;
+    float KIPS;
+    int continuous;
+
+    loopstart = 1000;       /* see the note about LOOP below */
+    continuous = 0;
+
+    II = 1;     /* start at the first arg (temp use of II here) */
+ /*   while (II < argc) {
+        if (strncmp(argv[II], "-c", 2) == 0 || argv[II][0] == 'c') {
+            continuous = 1;
+        } else if (atol(argv[II]) > 0) {
+            loopstart = atol(argv[II]);
+        } else {
+//            fprintf(stderr, USAGE);//original code
+            fprintf(stderr, USAGE);//not output toSTM32 version
+            return(1);
+        }
+        II++;
+    }*/
+
+LCONT:
+/*
+C
+C   Start benchmark timing at this point.
+C
+*/
+    startsec = time(0);
+
+/*
+C
+C   The actual benchmark starts here.
+C
+*/
+    T  = .499975;
+    T1 = 0.50025;
+    T2 = 2.0;
+/*
+C
+C   With loopcount LOOP=10, one million Whetstone instructions
+C   will be executed in EACH MAJOR LOOP..A MAJOR LOOP IS EXECUTED
+C   'II' TIMES TO INCREASE WALL-CLOCK TIMING ACCURACY.
+C
+    LOOP = 1000;
+*/
+    LOOP = loopstart;
+    II   = 1;
+
+    JJ = 1;
+
+IILOOP:
+    N1  = 0;
+    N2  = 12 * LOOP;
+    N3  = 14 * LOOP;
+    N4  = 345 * LOOP;
+    N6  = 210 * LOOP;
+    N7  = 32 * LOOP;
+    N8  = 899 * LOOP;
+    N9  = 616 * LOOP;
+    N10 = 0;
+    N11 = 93 * LOOP;
+/*
+C
+C   Module 1: Simple identifiers
+C
+*/
+    X1  =  1.0;
+    X2  = -1.0;
+    X3  = -1.0;
+    X4  = -1.0;
+
+    for (I = 1; I <= N1; I++) {
+        X1 = (X1 + X2 + X3 - X4) * T;
+        X2 = (X1 + X2 - X3 + X4) * T;
+        X3 = (X1 - X2 + X3 + X4) * T;
+        X4 = (-X1+ X2 + X3 + X4) * T;
+    }
+#ifdef PRINTOUT
+    IF (JJ==II)POUT(N1,N1,N1,X1,X2,X3,X4);
+#endif
+
+/*
+C
+C   Module 2: Array elements
+C
+*/
+    E1[1] =  1.0;
+    E1[2] = -1.0;
+    E1[3] = -1.0;
+    E1[4] = -1.0;
+
+    for (I = 1; I <= N2; I++) {
+        E1[1] = ( E1[1] + E1[2] + E1[3] - E1[4]) * T;
+        E1[2] = ( E1[1] + E1[2] - E1[3] + E1[4]) * T;
+        E1[3] = ( E1[1] - E1[2] + E1[3] + E1[4]) * T;
+        E1[4] = (-E1[1] + E1[2] + E1[3] + E1[4]) * T;
+    }
+
+#ifdef PRINTOUT
+    IF (JJ==II)POUT(N2,N3,N2,E1[1],E1[2],E1[3],E1[4]);
+#endif
+
+/*
+C
+C   Module 3: Array as parameter
+C
+*/
+    for (I = 1; I <= N3; I++)
+        PA(E1);
+
+#ifdef PRINTOUT
+    IF (JJ==II)POUT(N3,N2,N2,E1[1],E1[2],E1[3],E1[4]);
+#endif
+
+/*
+C
+C   Module 4: Conditional jumps
+C
+*/
+    J = 1;
+    for (I = 1; I <= N4; I++) {
+        if (J == 1)
+            J = 2;
+        else
+            J = 3;
+
+        if (J > 2)
+            J = 0;
+        else
+            J = 1;
+
+        if (J < 1)
+            J = 1;
+        else
+            J = 0;
+    }
+
+#ifdef PRINTOUT
+    IF (JJ==II)POUT(N4,J,J,X1,X2,X3,X4);
+#endif
+
+/*
+C
+C   Module 5: Omitted
+C   Module 6: Integer arithmetic
+C
+*/
+
+    J = 1;
+    K = 2;
+    L = 3;
+
+    for (I = 1; I <= N6; I++) {
+        J = J * (K-J) * (L-K);
+        K = L * K - (L-J) * K;
+        L = (L-K) * (K+J);
+        E1[L-1] = J + K + L;
+        E1[K-1] = J * K * L;
+    }
+
+#ifdef PRINTOUT
+    IF (JJ==II)POUT(N6,J,K,E1[1],E1[2],E1[3],E1[4]);
+#endif
+
+/*
+C
+C   Module 7: Trigonometric functions
+C
+*/
+    X = 0.5;
+    Y = 0.5;
+
+    for (I = 1; I <= N7; I++) {
+        X = T * DATAN(T2*DSIN(X)*DCOS(X)/(DCOS(X+Y)+DCOS(X-Y)-1.0));
+        Y = T * DATAN(T2*DSIN(Y)*DCOS(Y)/(DCOS(X+Y)+DCOS(X-Y)-1.0));
+    }
+
+#ifdef PRINTOUT
+    IF (JJ==II)POUT(N7,J,K,X,X,Y,Y);
+#endif
+
+/*
+C
+C   Module 8: Procedure calls
+C
+*/
+    X = 1.0;
+    Y = 1.0;
+    Z = 1.0;
+
+    for (I = 1; I <= N8; I++)
+        P3(X,Y,&Z);
+
+#ifdef PRINTOUT
+    IF (JJ==II)POUT(N8,J,K,X,Y,Z,Z);
+#endif
+
+/*
+C
+C   Module 9: Array references
+C
+*/
+    J = 1;
+    K = 2;
+    L = 3;
+    E1[1] = 1.0;
+    E1[2] = 2.0;
+    E1[3] = 3.0;
+
+    for (I = 1; I <= N9; I++)
+        P0();
+
+#ifdef PRINTOUT
+    IF (JJ==II)POUT(N9,J,K,E1[1],E1[2],E1[3],E1[4]);
+#endif
+
+/*
+C
+C   Module 10: Integer arithmetic
+C
+*/
+    J = 2;
+    K = 3;
+
+    for (I = 1; I <= N10; I++) {
+        J = J + K;
+        K = J + K;
+        J = K - J;
+        K = K - J - J;
+    }
+
+#ifdef PRINTOUT
+    IF (JJ==II)POUT(N10,J,K,X1,X2,X3,X4);
+#endif
+
+/*
+C
+C   Module 11: Standard functions
+C
+*/
+    X = 0.75;
+
+    for (I = 1; I <= N11; I++)
+        X = DSQRT(DEXP(DLOG(X)/T1));
+
+#ifdef PRINTOUT
+    IF (JJ==II)POUT(N11,J,K,X,X,X,X);
+#endif
+
+/*
+C
+C      THIS IS THE END OF THE MAJOR LOOP.
+C
+*/
+    if (++JJ <= II)
+        goto IILOOP;
+
+/*
+C
+C      Stop benchmark timing at this point.
+C
+*/
+    finisec = time(0);
+
+/*
+C----------------------------------------------------------------
+C      Performance in Whetstone KIP's per second is given by
+C
+C   (100*LOOP*II)/TIME
+C
+C      where TIME is in seconds.
+C--------------------------------------------------------------------
+*/
+    pc.printf("\n");
+    if (finisec-startsec <= 0) {
+        pc.printf("Insufficient duration- Increase the LOOP count\n");
+        return(1);
+    }
+
+    pc.printf("Loops: %ld, Iterations: %d, Duration: %ld sec.\n",
+            LOOP, II, finisec-startsec);
+
+    KIPS = (100.0*LOOP*II)/(float)(finisec-startsec);
+    if (KIPS >= 1000.0)
+        pc.printf("C Converted Double Precision Whetstones: %.1f MIPS\n", KIPS/1000.0);
+    else
+        pc.printf("C Converted Double Precision Whetstones: %.1f KIPS\n", KIPS);
+
+    if (continuous)
+        goto LCONT;
+
+    return(0);
+}
+
+void
+PA(double E[])
+{
+    J = 0;
+
+L10:
+    E[1] = ( E[1] + E[2] + E[3] - E[4]) * T;
+    E[2] = ( E[1] + E[2] - E[3] + E[4]) * T;
+    E[3] = ( E[1] - E[2] + E[3] + E[4]) * T;
+    E[4] = (-E[1] + E[2] + E[3] + E[4]) / T2;
+    J += 1;
+
+    if (J < 6)
+        goto L10;
+}
+
+void
+P0(void)
+{
+    E1[J] = E1[K];
+    E1[K] = E1[L];
+    E1[L] = E1[J];
+}
+
+void
+P3(double X, double Y, double *Z)
+{
+    double X1, Y1;
+
+    X1 = X;
+    Y1 = Y;
+    X1 = T * (X1 + Y1);
+    Y1 = T * (X1 + Y1);
+    *Z  = (X1 + Y1) / T2;
+}
+
+#ifdef PRINTOUT
+void
+POUT(long N, long J, long K, double X1, double X2, double X3, double X4)
+{
+    pc.printf("%7ld %7ld %7ld %12.4e %12.4e %12.4e %12.4e\n",
+                        N, J, K, X1, X2, X3, X4);
+}
+#endif
+ 
\ No newline at end of file