/* sladiv.f -- translated by f2c (version 20061008). You must link the resulting object file with libf2c: on Microsoft Windows system, link with libf2c.lib; on Linux or Unix systems, link with .../path/to/libf2c.a -lm or, if you install libf2c.a in a standard place, with -lf2c -lm -- in that order, at the end of the command line, as in cc *.o -lf2c -lm Source for libf2c is in /netlib/f2c/libf2c.zip, e.g., http://www.netlib.org/f2c/libf2c.zip */ #include "f2c.h" #include "blaswrap.h" /* Subroutine */ int sladiv_(real *a, real *b, real *c__, real *d__, real *p, real *q) { real e, f; /* -- LAPACK auxiliary routine (version 3.2) -- */ /* Univ. of Tennessee, Univ. of California Berkeley and NAG Ltd.. */ /* November 2006 */ /* .. Scalar Arguments .. */ /* .. */ /* Purpose */ /* ======= */ /* SLADIV performs complex division in real arithmetic */ /* a + i*b */ /* p + i*q = --------- */ /* c + i*d */ /* The algorithm is due to Robert L. Smith and can be found */ /* in D. Knuth, The art of Computer Programming, Vol.2, p.195 */ /* Arguments */ /* ========= */ /* A (input) REAL */ /* B (input) REAL */ /* C (input) REAL */ /* D (input) REAL */ /* The scalars a, b, c, and d in the above expression. */ /* P (output) REAL */ /* Q (output) REAL */ /* The scalars p and q in the above expression. */ /* ===================================================================== */ /* .. Local Scalars .. */ /* .. */ /* .. Intrinsic Functions .. */ /* .. */ /* .. Executable Statements .. */ if (dabs(*d__) < dabs(*c__)) { e = *d__ / *c__; f = *c__ + *d__ * e; *p = (*a + *b * e) / f; *q = (*b - *a * e) / f; } else { e = *c__ / *d__; f = *d__ + *c__ * e; *p = (*b + *a * e) / f; *q = (-(*a) + *b * e) / f; } return 0; /* End of SLADIV */ } /* sladiv_ */