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Diffstat (limited to 'gcc-4.9/gcc/testsuite/gfortran.fortran-torture/compile/pr37236.f')
| -rw-r--r-- | gcc-4.9/gcc/testsuite/gfortran.fortran-torture/compile/pr37236.f | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/gcc-4.9/gcc/testsuite/gfortran.fortran-torture/compile/pr37236.f b/gcc-4.9/gcc/testsuite/gfortran.fortran-torture/compile/pr37236.f new file mode 100644 index 000000000..8f7cc3695 --- /dev/null +++ b/gcc-4.9/gcc/testsuite/gfortran.fortran-torture/compile/pr37236.f @@ -0,0 +1,82 @@ +C + SUBROUTINE FFTRC (A,N,X,IWK,WK) +C SPECIFICATIONS FOR ARGUMENTS + INTEGER N,IWK(1) + REAL*8 A(N),WK(1) + COMPLEX*16 X(1) +C SPECIFICATIONS FOR LOCAL VARIABLES + INTEGER ND2P1,ND2,I,MTWO,M,IMAX,ND4,NP2,K,NMK,J + REAL*8 RPI,ZERO,ONE,HALF,THETA,TP,G(2),B(2),Z(2),AI, + 1 AR + COMPLEX*16 XIMAG,ALPH,BETA,GAM,S1,ZD + EQUIVALENCE (GAM,G(1)),(ALPH,B(1)),(Z(1),AR),(Z(2),AI), + 1 (ZD,Z(1)) + DATA ZERO/0.0D0/,HALF/0.5D0/,ONE/1.0D0/,IMAX/24/ + DATA RPI/3.141592653589793D0/ +C FIRST EXECUTABLE STATEMENT + IF (N .NE. 2) GO TO 5 +C N EQUAL TO 2 + ZD = DCMPLX(A(1),A(2)) + THETA = AR + TP = AI + X(2) = DCMPLX(THETA-TP,ZERO) + X(1) = DCMPLX(THETA+TP,ZERO) + GO TO 9005 + 5 CONTINUE +C N GREATER THAN 2 + ND2 = N/2 + ND2P1 = ND2+1 +C MOVE A TO X + J = 1 + DO 6 I=1,ND2 + X(I) = DCMPLX(A(J),A(J+1)) + J = J+2 + 6 CONTINUE +C COMPUTE THE CENTER COEFFICIENT + GAM = DCMPLX(ZERO,ZERO) + DO 10 I=1,ND2 + GAM = GAM + X(I) + 10 CONTINUE + TP = G(1)-G(2) + GAM = DCMPLX(TP,ZERO) +C DETERMINE THE SMALLEST M SUCH THAT +C N IS LESS THAN OR EQUAL TO 2**M + MTWO = 2 + M = 1 + DO 15 I=1,IMAX + IF (ND2 .LE. MTWO) GO TO 20 + MTWO = MTWO+MTWO + M = M+1 + 15 CONTINUE + 20 IF (ND2 .EQ. MTWO) GO TO 25 +C N IS NOT A POWER OF TWO, CALL FFTCC + CALL FFTCC (X,ND2,IWK,WK) + GO TO 30 +C N IS A POWER OF TWO, CALL FFT2C + 25 CALL FFT2C (X,M,IWK) + 30 ALPH = X(1) + X(1) = B(1) + B(2) + ND4 = (ND2+1)/2 + IF (ND4 .LT. 2) GO TO 40 + NP2 = ND2 + 2 + THETA = RPI/ND2 + TP = THETA + XIMAG = DCMPLX(ZERO,ONE) +C DECOMPOSE THE COMPLEX VECTOR X +C INTO THE COMPONENTS OF THE TRANSFORM +C OF THE INPUT DATA. + DO 35 K = 2,ND4 + NMK = NP2 - K + S1 = DCONJG(X(NMK)) + ALPH = X(K) + S1 + BETA = XIMAG*(S1-X(K)) + S1 = DCMPLX(DCOS(THETA),DSIN(THETA)) + X(K) = (ALPH+BETA*S1)*HALF + X(NMK) = DCONJG(ALPH-BETA*S1)*HALF + THETA = THETA + TP + 35 CONTINUE + 40 CONTINUE + X(ND2P1) = GAM + 9005 RETURN + END + |