diff options
author | cstout <cstout@google.com> | 2016-02-24 10:17:21 -0800 |
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committer | cstout <cstout@google.com> | 2016-02-24 10:17:21 -0800 |
commit | 5f050a570abe61bdb4f397b7d3ffcf95e06b891a (patch) | |
tree | fac7faf6ef11f10dd66372683758cef209a601f4 /external | |
parent | c370f398c60d9acc5ee7f07be38efe2b40f667de (diff) | |
download | common-5f050a570abe61bdb4f397b7d3ffcf95e06b891a.tar.gz |
[lib][libm] Add floorf and ceilf
Needed by skia.
R=travisg@gmail.com
Review URL: https://codereview.chromium.org/1734733002 .
Diffstat (limited to 'external')
-rw-r--r-- | external/lib/libm/rules.mk | 2 | ||||
-rw-r--r-- | external/lib/libm/s_ceilf.c | 52 | ||||
-rw-r--r-- | external/lib/libm/s_floorf.c | 61 |
3 files changed, 115 insertions, 0 deletions
diff --git a/external/lib/libm/rules.mk b/external/lib/libm/rules.mk index 02394537..9e0914d0 100644 --- a/external/lib/libm/rules.mk +++ b/external/lib/libm/rules.mk @@ -18,6 +18,7 @@ MODULE_SRCS += \ $(LOCAL_DIR)/e_sqrtf.c \ $(LOCAL_DIR)/k_rem_pio2.c \ $(LOCAL_DIR)/s_floor.c \ + $(LOCAL_DIR)/s_floorf.c \ $(LOCAL_DIR)/s_scalbn.c \ $(LOCAL_DIR)/s_scalbnf.c \ $(LOCAL_DIR)/s_copysign.c \ @@ -35,6 +36,7 @@ MODULE_SRCS += \ $(LOCAL_DIR)/e_exp.c \ $(LOCAL_DIR)/s_round.c \ $(LOCAL_DIR)/s_ceil.c \ + $(LOCAL_DIR)/s_ceilf.c \ $(LOCAL_DIR)/s_trunc.c \ $(LOCAL_DIR)/s_atan.c \ $(LOCAL_DIR)/e_atan2.c \ diff --git a/external/lib/libm/s_ceilf.c b/external/lib/libm/s_ceilf.c new file mode 100644 index 00000000..23bfe04e --- /dev/null +++ b/external/lib/libm/s_ceilf.c @@ -0,0 +1,52 @@ +/* s_ceilf.c -- float version of s_ceil.c. + * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com. + */ + +/* + * ==================================================== + * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. + * + * Developed at SunPro, a Sun Microsystems, Inc. business. + * Permission to use, copy, modify, and distribute this + * software is freely granted, provided that this notice + * is preserved. + * ==================================================== + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include "math.h" +#include "math_private.h" + +static const float huge = 1.0e30; + +float +ceilf(float x) +{ + int32_t i0,j0; + u_int32_t i; + + GET_FLOAT_WORD(i0,x); + j0 = ((i0>>23)&0xff)-0x7f; + if(j0<23) { + if(j0<0) { /* raise inexact if x != 0 */ + if(huge+x>(float)0.0) {/* return 0*sign(x) if |x|<1 */ + if(i0<0) {i0=0x80000000;} + else if(i0!=0) { i0=0x3f800000;} + } + } else { + i = (0x007fffff)>>j0; + if((i0&i)==0) return x; /* x is integral */ + if(huge+x>(float)0.0) { /* raise inexact flag */ + if(i0>0) i0 += (0x00800000)>>j0; + i0 &= (~i); + } + } + } else { + if(j0==0x80) return x+x; /* inf or NaN */ + else return x; /* x is integral */ + } + SET_FLOAT_WORD(x,i0); + return x; +} diff --git a/external/lib/libm/s_floorf.c b/external/lib/libm/s_floorf.c new file mode 100644 index 00000000..6b510dee --- /dev/null +++ b/external/lib/libm/s_floorf.c @@ -0,0 +1,61 @@ +/* s_floorf.c -- float version of s_floor.c. + * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com. + */ + +/* + * ==================================================== + * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. + * + * Developed at SunPro, a Sun Microsystems, Inc. business. + * Permission to use, copy, modify, and distribute this + * software is freely granted, provided that this notice + * is preserved. + * ==================================================== + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +/* + * floorf(x) + * Return x rounded toward -inf to integral value + * Method: + * Bit twiddling. + * Exception: + * Inexact flag raised if x not equal to floorf(x). + */ + +#include "math.h" +#include "math_private.h" + +static const float huge = 1.0e30; + +float +floorf(float x) +{ + int32_t i0,j0; + u_int32_t i; + GET_FLOAT_WORD(i0,x); + j0 = ((i0>>23)&0xff)-0x7f; + if(j0<23) { + if(j0<0) { /* raise inexact if x != 0 */ + if(huge+x>(float)0.0) {/* return 0*sign(x) if |x|<1 */ + if(i0>=0) {i0=0;} + else if((i0&0x7fffffff)!=0) + { i0=0xbf800000;} + } + } else { + i = (0x007fffff)>>j0; + if((i0&i)==0) return x; /* x is integral */ + if(huge+x>(float)0.0) { /* raise inexact flag */ + if(i0<0) i0 += (0x00800000)>>j0; + i0 &= (~i); + } + } + } else { + if(j0==0x80) return x+x; /* inf or NaN */ + else return x; /* x is integral */ + } + SET_FLOAT_WORD(x,i0); + return x; +} |