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| author | Priit Laes <plaes@plaes.org> | 2018-11-19 20:01:22 +0200 |
|---|---|---|
| committer | Kalle Valo <kvalo@codeaurora.org> | 2018-11-29 17:30:48 +0200 |
| commit | 58d81d64e06ffaea6bddc85ae2b7295c371bcc55 (patch) | |
| tree | 8b3212ca7189300141dbf644ae6a353cc052a314 /lib/cordic.c | |
| parent | 559afaa2c506688a94969158cd83249ceacb2e27 (diff) | |
| download | linux-58d81d64e06ffaea6bddc85ae2b7295c371bcc55.tar.gz linux-58d81d64e06ffaea6bddc85ae2b7295c371bcc55.tar.bz2 linux-58d81d64e06ffaea6bddc85ae2b7295c371bcc55.zip | |
lib: cordic: Move cordic macros and defines to header file
Now that these macros are in header file, we can eventually
clean up the duplicate macros present in the drivers that
utilize the same cordic algorithm implementation.
Also add CORDIC_ prefix to nonprefixed macros.
Reviewed-by: Arend van Spriel <arend.vanspriel@broadcom.com>
Signed-off-by: Priit Laes <plaes@plaes.org>
Acked-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Diffstat (limited to 'lib/cordic.c')
| -rw-r--r-- | lib/cordic.c | 23 |
1 files changed, 7 insertions, 16 deletions
diff --git a/lib/cordic.c b/lib/cordic.c index 6cf477839ebd..8ef27c12956f 100644 --- a/lib/cordic.c +++ b/lib/cordic.c @@ -16,15 +16,6 @@ #include <linux/module.h> #include <linux/cordic.h> -#define CORDIC_ANGLE_GEN 39797 -#define CORDIC_PRECISION_SHIFT 16 -#define CORDIC_NUM_ITER (CORDIC_PRECISION_SHIFT + 2) - -#define FIXED(X) ((s32)((X) << CORDIC_PRECISION_SHIFT)) -#define FLOAT(X) (((X) >= 0) \ - ? ((((X) >> (CORDIC_PRECISION_SHIFT - 1)) + 1) >> 1) \ - : -((((-(X)) >> (CORDIC_PRECISION_SHIFT - 1)) + 1) >> 1)) - static const s32 arctan_table[] = { 2949120, 1740967, @@ -64,16 +55,16 @@ struct cordic_iq cordic_calc_iq(s32 theta) coord.q = 0; angle = 0; - theta = FIXED(theta); + theta = CORDIC_FIXED(theta); signtheta = (theta < 0) ? -1 : 1; - theta = ((theta + FIXED(180) * signtheta) % FIXED(360)) - - FIXED(180) * signtheta; + theta = ((theta + CORDIC_FIXED(180) * signtheta) % CORDIC_FIXED(360)) - + CORDIC_FIXED(180) * signtheta; - if (FLOAT(theta) > 90) { - theta -= FIXED(180); + if (CORDIC_FLOAT(theta) > 90) { + theta -= CORDIC_FIXED(180); signx = -1; - } else if (FLOAT(theta) < -90) { - theta += FIXED(180); + } else if (CORDIC_FLOAT(theta) < -90) { + theta += CORDIC_FIXED(180); signx = -1; } |