lib: Move mathematic helpers to separate folder

For better maintenance and expansion move the mathematic helpers to the
separate folder.

No functional change intended.

Note, the int_sqrt() is not used as a part of lib, so, moved to regular
obj.

Link: http://lkml.kernel.org/r/20190323172531.80025-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Lee Jones <lee.jones@linaro.org>
Cc: Daniel Thompson <daniel.thompson@linaro.org>
Cc: Ray Jui <rjui@broadcom.com>
[mchehab+samsung@kernel.org: fix broken doc references for div64.c and gcd.c]
  Link: http://lkml.kernel.org/r/734f49bae5d4052b3c25691dfefad59bea2e5843.1555580999.git.mchehab+samsung@kernel.org
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 0 insertions, 92 deletions

diff --git a/lib/cordic.c b/lib/cordic.c
deleted file mode 100644
index 8ef27c12956f..000000000000
--- a/lib/cordic.c
+++ /dev/null
@@ -1,92 +0,0 @@
-/*
- * Copyright (c) 2011 Broadcom Corporation
- *
- * Permission to use, copy, modify, and/or distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
- * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
- * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
- * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
- * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
- * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
- */
-#include <linux/module.h>
-#include <linux/cordic.h>
-
-static const s32 arctan_table[] = {
-	2949120,
-	1740967,
-	919879,
-	466945,
-	234379,
-	117304,
-	58666,
-	29335,
-	14668,
-	7334,
-	3667,
-	1833,
-	917,
-	458,
-	229,
-	115,
-	57,
-	29
-};
-
-/*
- * cordic_calc_iq() - calculates the i/q coordinate for given angle
- *
- * theta: angle in degrees for which i/q coordinate is to be calculated
- * coord: function output parameter holding the i/q coordinate
- */
-struct cordic_iq cordic_calc_iq(s32 theta)
-{
-	struct cordic_iq coord;
-	s32 angle, valtmp;
-	unsigned iter;
-	int signx = 1;
-	int signtheta;
-
-	coord.i = CORDIC_ANGLE_GEN;
-	coord.q = 0;
-	angle = 0;
-
-	theta = CORDIC_FIXED(theta);
-	signtheta = (theta < 0) ? -1 : 1;
-	theta = ((theta + CORDIC_FIXED(180) * signtheta) % CORDIC_FIXED(360)) -
-		CORDIC_FIXED(180) * signtheta;
-
-	if (CORDIC_FLOAT(theta) > 90) {
-		theta -= CORDIC_FIXED(180);
-		signx = -1;
-	} else if (CORDIC_FLOAT(theta) < -90) {
-		theta += CORDIC_FIXED(180);
-		signx = -1;
-	}
-
-	for (iter = 0; iter < CORDIC_NUM_ITER; iter++) {
-		if (theta > angle) {
-			valtmp = coord.i - (coord.q >> iter);
-			coord.q += (coord.i >> iter);
-			angle += arctan_table[iter];
-		} else {
-			valtmp = coord.i + (coord.q >> iter);
-			coord.q -= (coord.i >> iter);
-			angle -= arctan_table[iter];
-		}
-		coord.i = valtmp;
-	}
-
-	coord.i *= signx;
-	coord.q *= signx;
-	return coord;
-}
-EXPORT_SYMBOL(cordic_calc_iq);
-
-MODULE_DESCRIPTION("CORDIC algorithm");
-MODULE_AUTHOR("Broadcom Corporation");
-MODULE_LICENSE("Dual BSD/GPL");