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[/] [openrisc/] [trunk/] [gnu-src/] [gcc-4.5.1/] [gcc/] [testsuite/] [gfortran.fortran-torture/] [execute/] [equiv_5.f] - Blame information for rev 303

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Line No. Rev Author Line
1 303 jeremybenn
C  This testcase was miscompiled on i?86/x86_64, the scheduler
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C  swapped write to DMACH(1) with following read from SMALL(1),
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C  at -O2+, as the front-end didn't signal in any way this kind
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C  of type punning is ok.
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C  The testcase is from blas, http://www.netlib.org/blas/d1mach.f
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      DOUBLE PRECISION FUNCTION D1MACH(I)
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      INTEGER*4 I
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C
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C  DOUBLE-PRECISION MACHINE CONSTANTS
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C  D1MACH( 1) = B**(EMIN-1), THE SMALLEST POSITIVE MAGNITUDE.
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C  D1MACH( 2) = B**EMAX*(1 - B**(-T)), THE LARGEST MAGNITUDE.
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C  D1MACH( 3) = B**(-T), THE SMALLEST RELATIVE SPACING.
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C  D1MACH( 4) = B**(1-T), THE LARGEST RELATIVE SPACING.
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C  D1MACH( 5) = LOG10(B)
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C
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      INTEGER*4 SMALL(2)
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      INTEGER*4 LARGE(2)
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      INTEGER*4 RIGHT(2)
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      INTEGER*4 DIVER(2)
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      INTEGER*4 LOG10(2)
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      INTEGER*4 SC, CRAY1(38), J
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      COMMON /D9MACH/ CRAY1
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      SAVE SMALL, LARGE, RIGHT, DIVER, LOG10, SC
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      DOUBLE PRECISION DMACH(5)
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      EQUIVALENCE (DMACH(1),SMALL(1))
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      EQUIVALENCE (DMACH(2),LARGE(1))
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      EQUIVALENCE (DMACH(3),RIGHT(1))
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      EQUIVALENCE (DMACH(4),DIVER(1))
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      EQUIVALENCE (DMACH(5),LOG10(1))
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C  THIS VERSION ADAPTS AUTOMATICALLY TO MOST CURRENT MACHINES.
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C  R1MACH CAN HANDLE AUTO-DOUBLE COMPILING, BUT THIS VERSION OF
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C  D1MACH DOES NOT, BECAUSE WE DO NOT HAVE QUAD CONSTANTS FOR
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C  MANY MACHINES YET.
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C  TO COMPILE ON OLDER MACHINES, ADD A C IN COLUMN 1
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C  ON THE NEXT LINE
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      DATA SC/0/
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C  AND REMOVE THE C FROM COLUMN 1 IN ONE OF THE SECTIONS BELOW.
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C  CONSTANTS FOR EVEN OLDER MACHINES CAN BE OBTAINED BY
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C          mail netlib@research.bell-labs.com
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C          send old1mach from blas
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C  PLEASE SEND CORRECTIONS TO dmg OR ehg@bell-labs.com.
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C
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C     MACHINE CONSTANTS FOR THE HONEYWELL DPS 8/70 SERIES.
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C      DATA SMALL(1),SMALL(2) / O402400000000, O000000000000 /
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C      DATA LARGE(1),LARGE(2) / O376777777777, O777777777777 /
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C      DATA RIGHT(1),RIGHT(2) / O604400000000, O000000000000 /
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C      DATA DIVER(1),DIVER(2) / O606400000000, O000000000000 /
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C      DATA LOG10(1),LOG10(2) / O776464202324, O117571775714 /, SC/987/
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C
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C     MACHINE CONSTANTS FOR PDP-11 FORTRANS SUPPORTING
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C     32-BIT INTEGER*4S.
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C      DATA SMALL(1),SMALL(2) /    8388608,           0 /
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C      DATA LARGE(1),LARGE(2) / 2147483647,          -1 /
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C      DATA RIGHT(1),RIGHT(2) /  612368384,           0 /
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C      DATA DIVER(1),DIVER(2) /  620756992,           0 /
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C      DATA LOG10(1),LOG10(2) / 1067065498, -2063872008 /, SC/987/
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C
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C     MACHINE CONSTANTS FOR THE UNIVAC 1100 SERIES.
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C      DATA SMALL(1),SMALL(2) / O000040000000, O000000000000 /
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C      DATA LARGE(1),LARGE(2) / O377777777777, O777777777777 /
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C      DATA RIGHT(1),RIGHT(2) / O170540000000, O000000000000 /
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C      DATA DIVER(1),DIVER(2) / O170640000000, O000000000000 /
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C      DATA LOG10(1),LOG10(2) / O177746420232, O411757177572 /, SC/987/
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C
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C     ON FIRST CALL, IF NO DATA UNCOMMENTED, TEST MACHINE TYPES.
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      IF (SC .NE. 987) THEN
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         DMACH(1) = 1.D13
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         IF (      SMALL(1) .EQ. 1117925532
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     *       .AND. SMALL(2) .EQ. -448790528) THEN
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*           *** IEEE BIG ENDIAN ***
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            SMALL(1) = 1048576
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            SMALL(2) = 0
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            LARGE(1) = 2146435071
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            LARGE(2) = -1
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            RIGHT(1) = 1017118720
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            RIGHT(2) = 0
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            DIVER(1) = 1018167296
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            DIVER(2) = 0
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            LOG10(1) = 1070810131
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            LOG10(2) = 1352628735
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         ELSE IF ( SMALL(2) .EQ. 1117925532
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     *       .AND. SMALL(1) .EQ. -448790528) THEN
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*           *** IEEE LITTLE ENDIAN ***
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            SMALL(2) = 1048576
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            SMALL(1) = 0
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            LARGE(2) = 2146435071
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            LARGE(1) = -1
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            RIGHT(2) = 1017118720
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            RIGHT(1) = 0
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            DIVER(2) = 1018167296
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            DIVER(1) = 0
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            LOG10(2) = 1070810131
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            LOG10(1) = 1352628735
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         ELSE IF ( SMALL(1) .EQ. -2065213935
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     *       .AND. SMALL(2) .EQ. 10752) THEN
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*               *** VAX WITH D_FLOATING ***
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            SMALL(1) = 128
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            SMALL(2) = 0
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            LARGE(1) = -32769
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            LARGE(2) = -1
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            RIGHT(1) = 9344
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            RIGHT(2) = 0
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            DIVER(1) = 9472
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            DIVER(2) = 0
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            LOG10(1) = 546979738
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            LOG10(2) = -805796613
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         ELSE IF ( SMALL(1) .EQ. 1267827943
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     *       .AND. SMALL(2) .EQ. 704643072) THEN
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*               *** IBM MAINFRAME ***
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            SMALL(1) = 1048576
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            SMALL(2) = 0
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            LARGE(1) = 2147483647
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            LARGE(2) = -1
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            RIGHT(1) = 856686592
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            RIGHT(2) = 0
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            DIVER(1) = 873463808
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            DIVER(2) = 0
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            LOG10(1) = 1091781651
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            LOG10(2) = 1352628735
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         ELSE IF ( SMALL(1) .EQ. 1120022684
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     *       .AND. SMALL(2) .EQ. -448790528) THEN
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*           *** CONVEX C-1 ***
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            SMALL(1) = 1048576
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            SMALL(2) = 0
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            LARGE(1) = 2147483647
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            LARGE(2) = -1
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            RIGHT(1) = 1019215872
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            RIGHT(2) = 0
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            DIVER(1) = 1020264448
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            DIVER(2) = 0
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            LOG10(1) = 1072907283
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            LOG10(2) = 1352628735
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         ELSE IF ( SMALL(1) .EQ. 815547074
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     *       .AND. SMALL(2) .EQ. 58688) THEN
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*           *** VAX G-FLOATING ***
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            SMALL(1) = 16
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            SMALL(2) = 0
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            LARGE(1) = -32769
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            LARGE(2) = -1
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            RIGHT(1) = 15552
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            RIGHT(2) = 0
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            DIVER(1) = 15568
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            DIVER(2) = 0
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            LOG10(1) = 1142112243
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            LOG10(2) = 2046775455
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         ELSE
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            DMACH(2) = 1.D27 + 1
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            DMACH(3) = 1.D27
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            LARGE(2) = LARGE(2) - RIGHT(2)
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            IF (LARGE(2) .EQ. 64 .AND. SMALL(2) .EQ. 0) THEN
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               CRAY1(1) = 67291416
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               DO 10 J = 1, 20
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                  CRAY1(J+1) = CRAY1(J) + CRAY1(J)
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 10               CONTINUE
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               CRAY1(22) = CRAY1(21) + 321322
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               DO 20 J = 22, 37
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                  CRAY1(J+1) = CRAY1(J) + CRAY1(J)
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 20               CONTINUE
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               IF (CRAY1(38) .EQ. SMALL(1)) THEN
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*                  *** CRAY ***
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                  CALL I1MCRY(SMALL(1), J, 8285, 8388608, 0)
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                  SMALL(2) = 0
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                  CALL I1MCRY(LARGE(1), J, 24574, 16777215, 16777215)
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                  CALL I1MCRY(LARGE(2), J, 0, 16777215, 16777214)
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                  CALL I1MCRY(RIGHT(1), J, 16291, 8388608, 0)
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                  RIGHT(2) = 0
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                  CALL I1MCRY(DIVER(1), J, 16292, 8388608, 0)
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                  DIVER(2) = 0
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                  CALL I1MCRY(LOG10(1), J, 16383, 10100890, 8715215)
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                  CALL I1MCRY(LOG10(2), J, 0, 16226447, 9001388)
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               ELSE
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                  WRITE(*,9000)
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                  STOP 779
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                  END IF
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            ELSE
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               WRITE(*,9000)
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               STOP 779
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               END IF
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            END IF
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         SC = 987
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         END IF
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*    SANITY CHECK
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      IF (DMACH(4) .GE. 1.0D0) STOP 778
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      IF (I .LT. 1 .OR. I .GT. 5) THEN
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         WRITE(*,*) 'D1MACH(I): I =',I,' is out of bounds.'
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         STOP
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         END IF
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      D1MACH = DMACH(I)
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      RETURN
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 9000 FORMAT(/' Adjust D1MACH by uncommenting data statements'/
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     *' appropriate for your machine.')
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* /* Standard C source for D1MACH -- remove the * in column 1 */
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*#include <stdio.h>
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*#include <float.h>
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*#include <math.h>
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*double d1mach_(long *i)
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*{
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*       switch(*i){
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*         case 1: return DBL_MIN;
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*         case 2: return DBL_MAX;
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*         case 3: return DBL_EPSILON/FLT_RADIX;
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*         case 4: return DBL_EPSILON;
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*         case 5: return log10((double)FLT_RADIX);
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*         }
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*       fprintf(stderr, "invalid argument: d1mach(%ld)\n", *i);
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*       exit(1); return 0; /* some compilers demand return values */
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*}
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      END
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      SUBROUTINE I1MCRY(A, A1, B, C, D)
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**** SPECIAL COMPUTATION FOR OLD CRAY MACHINES ****
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      INTEGER*4 A, A1, B, C, D
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      A1 = 16777216*B + C
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      A = 16777216*A1 + D
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      END
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      PROGRAM MAIN
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      DOUBLE PRECISION D1MACH
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      EXTERNAL D1MACH
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      PRINT *,D1MACH(1)
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      PRINT *,D1MACH(2)
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      PRINT *,D1MACH(3)
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      PRINT *,D1MACH(4)
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      PRINT *,D1MACH(5)
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      END

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