Squashed 'third_party/eigen/' changes from 61d72f6..cf794d3
Change-Id: I9b814151b01f49af6337a8605d0c42a3a1ed4c72
git-subtree-dir: third_party/eigen
git-subtree-split: cf794d3b741a6278df169e58461f8529f43bce5d
diff --git a/blas/f2c/srotmg.c b/blas/f2c/srotmg.c
new file mode 100644
index 0000000..75f789f
--- /dev/null
+++ b/blas/f2c/srotmg.c
@@ -0,0 +1,295 @@
+/* srotmg.f -- translated by f2c (version 20100827).
+ 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 "datatypes.h"
+
+/* Subroutine */ int srotmg_(real *sd1, real *sd2, real *sx1, real *sy1, real
+ *sparam)
+{
+ /* Initialized data */
+
+ static real zero = 0.f;
+ static real one = 1.f;
+ static real two = 2.f;
+ static real gam = 4096.f;
+ static real gamsq = 16777200.f;
+ static real rgamsq = 5.96046e-8f;
+
+ /* Format strings */
+ static char fmt_120[] = "";
+ static char fmt_150[] = "";
+ static char fmt_180[] = "";
+ static char fmt_210[] = "";
+
+ /* System generated locals */
+ real r__1;
+
+ /* Local variables */
+ real su, sp1, sp2, sq1, sq2, sh11, sh12, sh21, sh22;
+ integer igo;
+ real sflag, stemp;
+
+ /* Assigned format variables */
+ static char *igo_fmt;
+
+/* .. Scalar Arguments .. */
+/* .. */
+/* .. Array Arguments .. */
+/* .. */
+
+/* Purpose */
+/* ======= */
+
+/* CONSTRUCT THE MODIFIED GIVENS TRANSFORMATION MATRIX H WHICH ZEROS */
+/* THE SECOND COMPONENT OF THE 2-VECTOR (SQRT(SD1)*SX1,SQRT(SD2)* */
+/* SY2)**T. */
+/* WITH SPARAM(1)=SFLAG, H HAS ONE OF THE FOLLOWING FORMS.. */
+
+/* SFLAG=-1.E0 SFLAG=0.E0 SFLAG=1.E0 SFLAG=-2.E0 */
+
+/* (SH11 SH12) (1.E0 SH12) (SH11 1.E0) (1.E0 0.E0) */
+/* H=( ) ( ) ( ) ( ) */
+/* (SH21 SH22), (SH21 1.E0), (-1.E0 SH22), (0.E0 1.E0). */
+/* LOCATIONS 2-4 OF SPARAM CONTAIN SH11,SH21,SH12, AND SH22 */
+/* RESPECTIVELY. (VALUES OF 1.E0, -1.E0, OR 0.E0 IMPLIED BY THE */
+/* VALUE OF SPARAM(1) ARE NOT STORED IN SPARAM.) */
+
+/* THE VALUES OF GAMSQ AND RGAMSQ SET IN THE DATA STATEMENT MAY BE */
+/* INEXACT. THIS IS OK AS THEY ARE ONLY USED FOR TESTING THE SIZE */
+/* OF SD1 AND SD2. ALL ACTUAL SCALING OF DATA IS DONE USING GAM. */
+
+
+/* Arguments */
+/* ========= */
+
+
+/* SD1 (input/output) REAL */
+
+/* SD2 (input/output) REAL */
+
+/* SX1 (input/output) REAL */
+
+/* SY1 (input) REAL */
+
+
+/* SPARAM (input/output) REAL array, dimension 5 */
+/* SPARAM(1)=SFLAG */
+/* SPARAM(2)=SH11 */
+/* SPARAM(3)=SH21 */
+/* SPARAM(4)=SH12 */
+/* SPARAM(5)=SH22 */
+
+/* ===================================================================== */
+
+/* .. Local Scalars .. */
+/* .. */
+/* .. Intrinsic Functions .. */
+/* .. */
+/* .. Data statements .. */
+
+ /* Parameter adjustments */
+ --sparam;
+
+ /* Function Body */
+/* .. */
+ if (! (*sd1 < zero)) {
+ goto L10;
+ }
+/* GO ZERO-H-D-AND-SX1.. */
+ goto L60;
+L10:
+/* CASE-SD1-NONNEGATIVE */
+ sp2 = *sd2 * *sy1;
+ if (! (sp2 == zero)) {
+ goto L20;
+ }
+ sflag = -two;
+ goto L260;
+/* REGULAR-CASE.. */
+L20:
+ sp1 = *sd1 * *sx1;
+ sq2 = sp2 * *sy1;
+ sq1 = sp1 * *sx1;
+
+ if (! (dabs(sq1) > dabs(sq2))) {
+ goto L40;
+ }
+ sh21 = -(*sy1) / *sx1;
+ sh12 = sp2 / sp1;
+
+ su = one - sh12 * sh21;
+
+ if (! (su <= zero)) {
+ goto L30;
+ }
+/* GO ZERO-H-D-AND-SX1.. */
+ goto L60;
+L30:
+ sflag = zero;
+ *sd1 /= su;
+ *sd2 /= su;
+ *sx1 *= su;
+/* GO SCALE-CHECK.. */
+ goto L100;
+L40:
+ if (! (sq2 < zero)) {
+ goto L50;
+ }
+/* GO ZERO-H-D-AND-SX1.. */
+ goto L60;
+L50:
+ sflag = one;
+ sh11 = sp1 / sp2;
+ sh22 = *sx1 / *sy1;
+ su = one + sh11 * sh22;
+ stemp = *sd2 / su;
+ *sd2 = *sd1 / su;
+ *sd1 = stemp;
+ *sx1 = *sy1 * su;
+/* GO SCALE-CHECK */
+ goto L100;
+/* PROCEDURE..ZERO-H-D-AND-SX1.. */
+L60:
+ sflag = -one;
+ sh11 = zero;
+ sh12 = zero;
+ sh21 = zero;
+ sh22 = zero;
+
+ *sd1 = zero;
+ *sd2 = zero;
+ *sx1 = zero;
+/* RETURN.. */
+ goto L220;
+/* PROCEDURE..FIX-H.. */
+L70:
+ if (! (sflag >= zero)) {
+ goto L90;
+ }
+
+ if (! (sflag == zero)) {
+ goto L80;
+ }
+ sh11 = one;
+ sh22 = one;
+ sflag = -one;
+ goto L90;
+L80:
+ sh21 = -one;
+ sh12 = one;
+ sflag = -one;
+L90:
+ switch (igo) {
+ case 0: goto L120;
+ case 1: goto L150;
+ case 2: goto L180;
+ case 3: goto L210;
+ }
+/* PROCEDURE..SCALE-CHECK */
+L100:
+L110:
+ if (! (*sd1 <= rgamsq)) {
+ goto L130;
+ }
+ if (*sd1 == zero) {
+ goto L160;
+ }
+ igo = 0;
+ igo_fmt = fmt_120;
+/* FIX-H.. */
+ goto L70;
+L120:
+/* Computing 2nd power */
+ r__1 = gam;
+ *sd1 *= r__1 * r__1;
+ *sx1 /= gam;
+ sh11 /= gam;
+ sh12 /= gam;
+ goto L110;
+L130:
+L140:
+ if (! (*sd1 >= gamsq)) {
+ goto L160;
+ }
+ igo = 1;
+ igo_fmt = fmt_150;
+/* FIX-H.. */
+ goto L70;
+L150:
+/* Computing 2nd power */
+ r__1 = gam;
+ *sd1 /= r__1 * r__1;
+ *sx1 *= gam;
+ sh11 *= gam;
+ sh12 *= gam;
+ goto L140;
+L160:
+L170:
+ if (! (dabs(*sd2) <= rgamsq)) {
+ goto L190;
+ }
+ if (*sd2 == zero) {
+ goto L220;
+ }
+ igo = 2;
+ igo_fmt = fmt_180;
+/* FIX-H.. */
+ goto L70;
+L180:
+/* Computing 2nd power */
+ r__1 = gam;
+ *sd2 *= r__1 * r__1;
+ sh21 /= gam;
+ sh22 /= gam;
+ goto L170;
+L190:
+L200:
+ if (! (dabs(*sd2) >= gamsq)) {
+ goto L220;
+ }
+ igo = 3;
+ igo_fmt = fmt_210;
+/* FIX-H.. */
+ goto L70;
+L210:
+/* Computing 2nd power */
+ r__1 = gam;
+ *sd2 /= r__1 * r__1;
+ sh21 *= gam;
+ sh22 *= gam;
+ goto L200;
+L220:
+ if (sflag < 0.f) {
+ goto L250;
+ } else if (sflag == 0) {
+ goto L230;
+ } else {
+ goto L240;
+ }
+L230:
+ sparam[3] = sh21;
+ sparam[4] = sh12;
+ goto L260;
+L240:
+ sparam[2] = sh11;
+ sparam[5] = sh22;
+ goto L260;
+L250:
+ sparam[2] = sh11;
+ sparam[3] = sh21;
+ sparam[4] = sh12;
+ sparam[5] = sh22;
+L260:
+ sparam[1] = sflag;
+ return 0;
+} /* srotmg_ */
+