glibc/sysdeps/ia64/fpu/s_modff.S
Andreas Jaeger aeb25823d8 Update.
2002-06-05  Brian Youmans <3diff@gnu.org>

	* sysdeps/ia64/fpu/e_acos.S: Added text of Intel license.
	* sysdeps/ia64/fpu/e_acosf.S: Likewise.
	* sysdeps/ia64/fpu/e_acosl.S: Likewise.
	* sysdeps/ia64/fpu/e_asin.S: Likewise.
	* sysdeps/ia64/fpu/e_asinf.S: Likewise.
	* sysdeps/ia64/fpu/e_asinl.S: Likewise.
	* sysdeps/ia64/fpu/e_atan2.S: Likewise.
	* sysdeps/ia64/fpu/e_atan2f.S: Likewise.
	* sysdeps/ia64/fpu/e_cosh.S: Likewise.
	* sysdeps/ia64/fpu/e_coshf.S: Likewise.
	* sysdeps/ia64/fpu/e_coshl.S: Likewise.
	* sysdeps/ia64/fpu/e_exp.S: Likewise.
	* sysdeps/ia64/fpu/e_expf.S: Likewise.
	* sysdeps/ia64/fpu/e_fmod.S: Likewise.
	* sysdeps/ia64/fpu/e_fmodf.S: Likewise.
	* sysdeps/ia64/fpu/e_fmodl.S: Likewise.
	* sysdeps/ia64/fpu/e_hypot.S: Likewise.
	* sysdeps/ia64/fpu/e_hypotf.S: Likewise.
	* sysdeps/ia64/fpu/e_hypotl.S: Likewise.
	* sysdeps/ia64/fpu/e_log.S: Likewise.
	* sysdeps/ia64/fpu/e_logf.S: Likewise.
	* sysdeps/ia64/fpu/e_pow.S: Likewise.
	* sysdeps/ia64/fpu/e_powf.S: Likewise.
	* sysdeps/ia64/fpu/e_powl.S: Likewise.
	* sysdeps/ia64/fpu/e_remainder.S: Likewise.
	* sysdeps/ia64/fpu/e_remainderf.S: Likewise.
	* sysdeps/ia64/fpu/e_remainderl.S: Likewise.
	* sysdeps/ia64/fpu/e_scalb.S: Likewise.
	* sysdeps/ia64/fpu/e_scalbf.S: Likewise.
	* sysdeps/ia64/fpu/e_scalbl.S: Likewise.
	* sysdeps/ia64/fpu/e_sinh.S: Likewise.
	* sysdeps/ia64/fpu/e_sinhf.S: Likewise.
	* sysdeps/ia64/fpu/e_sinhl.S: Likewise.
	* sysdeps/ia64/fpu/e_sqrt.S: Likewise.
	* sysdeps/ia64/fpu/e_sqrtf.S: Likewise.
	* sysdeps/ia64/fpu/e_sqrtl.S: Likewise.
	* sysdeps/ia64/fpu/libm_atan2_req.S: Likewise.
	* sysdeps/ia64/fpu/libm_error.c: Likewise.
	* sysdeps/ia64/fpu/libm_frexp4.S: Likewise.
	* sysdeps/ia64/fpu/libm_frexp4f.S: Likewise.
	* sysdeps/ia64/fpu/s_frexpl.c: Likewise.
	* sysdeps/ia64/fpu/s_ilogb.S: Likewise.
	* sysdeps/ia64/fpu/s_ilogbf.S: Likewise.
	* sysdeps/ia64/fpu/s_ilogbl.S: Likewise.
	* sysdeps/ia64/fpu/s_ldexp.S: Likewise.
	* sysdeps/ia64/fpu/s_ldexpf.S: Likewise.
	* sysdeps/ia64/fpu/s_ldexpl.S: Likewise.
	* sysdeps/ia64/fpu/s_log1p.S: Likewise.
	* sysdeps/ia64/fpu/s_log1pf.S: Likewise.
	* sysdeps/ia64/fpu/s_log1pl.S: Likewise.
	* sysdeps/ia64/fpu/s_logb.S: Likewise.
	* sysdeps/ia64/fpu/s_logbf.S: Likewise.
	* sysdeps/ia64/fpu/s_logbl.S: Likewise.
	* sysdeps/ia64/fpu/s_modf.S: Likewise.
	* sysdeps/ia64/fpu/s_modff.S: Likewise.
	* sysdeps/ia64/fpu/s_modfl.S: Likewise.
	* sysdeps/ia64/fpu/s_nearbyint.S: Likewise.
	* sysdeps/ia64/fpu/s_nearbyintf.S: Likewise.
	* sysdeps/ia64/fpu/s_nearbyintl.S: Likewise.
	* sysdeps/ia64/fpu/s_rint.S: Likewise.
	* sysdeps/ia64/fpu/s_rintf.S: Likewise.
	* sysdeps/ia64/fpu/s_rintl.S: Likewise.
	* sysdeps/ia64/fpu/s_round.S: Likewise.
	* sysdeps/ia64/fpu/s_roundf.S: Likewise.
	* sysdeps/ia64/fpu/s_roundl.S: Likewise.
	* sysdeps/ia64/fpu/s_scalbn.S: Likewise.
	* sysdeps/ia64/fpu/s_scalbnf.S: Likewise.
	* sysdeps/ia64/fpu/s_scalbnl.S: Likewise.
	* sysdeps/ia64/fpu/s_significand.S: Likewise.
	* sysdeps/ia64/fpu/s_significandf.S: Likewise.
	* sysdeps/ia64/fpu/s_significandl.S: Likewise.
	* sysdeps/ia64/fpu/s_tan.S: Likewise.
	* sysdeps/ia64/fpu/s_tanf.S: Likewise.
	* sysdeps/ia64/fpu/s_tanl.S: Likewise.
	* sysdeps/ia64/fpu/s_trunc.S: Likewise.
	* sysdeps/ia64/fpu/s_truncf.S: Likewise.
	* sysdeps/ia64/fpu/s_truncl.S: Likewise.
	* sysdeps/ieee754/dbl-64/doasin.c: Changed copyright notice to
	reflect IBM donation of math library to FSF
	* sysdeps/ieee754/dbl-64/dosincos.c: Likewise.
	* sysdeps/ieee754/dbl-64/e_asin.c: Likewise.
	* sysdeps/ieee754/dbl-64/e_atan2.c: Likewise.
	* sysdeps/ieee754/dbl-64/e_exp.c: Likewise.
	* sysdeps/ieee754/dbl-64/e_log.c: Likewise.
	* sysdeps/ieee754/dbl-64/e_pow.c: Likewise.
	* sysdeps/ieee754/dbl-64/e_remainder.c: Likewise.
	* sysdeps/ieee754/dbl-64/e_sqrt.c: Likewise.
	* sysdeps/ieee754/dbl-64/halfulp.c: Likewise.
	* sysdeps/ieee754/dbl-64/mpa.c: Likewise.
	* sysdeps/ieee754/dbl-64/mpatan.c: Likewise.
	* sysdeps/ieee754/dbl-64/mpatan2.c: Likewise.
	* sysdeps/ieee754/dbl-64/mpexp.c: Likewise.
	* sysdeps/ieee754/dbl-64/mplog.c: Likewise.
	* sysdeps/ieee754/dbl-64/mpsqrt.c: Likewise.
	* sysdeps/ieee754/dbl-64/mptan.c: Likewise.
	* sysdeps/ieee754/dbl-64/s_atan.c: Likewise.
	* sysdeps/ieee754/dbl-64/s_sin.c: Likewise.
	* sysdeps/ieee754/dbl-64/s_tan.c: Likewise.
	* sysdeps/ieee754/dbl-64/sincos32.c: Likewise.
	* sysdeps/ieee754/dbl-64/slowexp.c: Likewise.
	* sysdeps/ieee754/dbl-64/slowpow.c: Likewise.
	* sysdeps/gnu/netinet/udp.h: Added BSD copying permission notice
	* sysdeps/vax/__longjmp.c: Likewise.
	* sysdeps/vax/setjmp.c: Likewise.
	* libio/filedoalloc.c: Fixed BSD copying permission notice to
	remove advertising clause
	* sysdeps/vax/htonl.s: Likewise.
	* sysdeps/vax/htons.s: Likewise.
	* libio/wfiledoalloc.c: Likewise.
	* stdlib/random.c: Likewise.
	* stdlib/random_r.c: Likewise.
	* sysdeps/mach/sys/reboot.h: Likewise.
	* inet/getnameinfo.c: Deleted advertising clause from Inner Net License
	* sysdeps/posix/getaddrinfo.c: Likewise.
	* sunrpc/des_impl.c: Updated license permission notice to Lesser
	GPL and corrected pointer to point to the correct license.
2002-07-06 06:36:39 +00:00

286 lines
7.9 KiB
ArmAsm

.file "modff.s"
// Copyright (C) 2000, 2001, Intel Corporation
// All rights reserved.
//
// Contributed 2/2/2000 by John Harrison, Ted Kubaska, Bob Norin, Shane Story,
// and Ping Tak Peter Tang of the Computational Software Lab, Intel Corporation.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//
// * Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// * The name of Intel Corporation may not be used to endorse or promote
// products derived from this software without specific prior written
// permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL INTEL OR ITS
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
// OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY OR TORT (INCLUDING
// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Intel Corporation is the author of this code, and requests that all
// problem reports or change requests be submitted to it directly at
// http://developer.intel.com/opensource.
//
// History
//==============================================================
// 2/02/00: Initial version
// 4/04/00: Improved speed, corrected result for NaN input
// 12/22/00 Fixed so inexact flag is never set, and invalid is not set for
// qnans nor for inputs larger than 2^63.
//
// API
//==============================================================
// float modff(float x, float *iptr)
// break a floating point x number into fraction and an exponent
//
// input floating point f8, address in r33
// output floating point f8 (x fraction), and *iptr (x integral part)
//
// OVERVIEW
//==============================================================
// NO FRACTIONAL PART: HUGE
// If
// for double-extended
// If the true exponent is greater than or equal 63
// 1003e ==> 1003e -ffff = 3f = 63(dec)
// for double
// If the true exponent is greater than or equal 52
// 10033 -ffff = 34 = 52(dec)
// for single
// If the true exponent is greater than or equal 23
// 10016 -ffff = 17 = 23(dec)
// then
// we are already an integer (p9 true)
// NO INTEGER PART: SMALL
// Is f8 exponent less than register bias (that is, is it
// less than 1). If it is, get the right sign of
// zero and store this in iptr.
// CALCULATION: NOT HUGE, NOT SMALL
// To get the integer part
// Take the floating-point input and truncate
// then convert this integer to fp Call it MODF_INTEGER_PART
// Subtract MODF_INTEGER_PART from MODF_NORM_F8 to get fraction part
// Then put fraction part in f8
// put integer part MODF_INTEGER_PART into *iptr
// Registers used
//==============================================================
// predicate registers used:
// p6 - p13
// 0xFFFF 0x10016
// -----------------------+-----------------+-------------
// SMALL | NORMAL | HUGE
// p11 --------------->|<----- p12 ----->| <-------------- p9
// p10 --------------------------------->|
// p13 --------------------------------------------------->|
//
#include "libm_support.h"
// floating-point registers used:
MODF_NORM_F8 = f9
MODF_FRACTION_PART = f10
MODF_INTEGER_PART = f11
MODF_INT_INTEGER_PART = f12
// general registers used
modf_signexp = r14
modf_GR_no_frac = r15
modf_GR_FFFF = r16
modf_17_ones = r17
modf_exp = r18
// r33 = iptr
.align 32
.global modff#
.section .text
.proc modff#
.align 32
// Main path is p9, p11, p8 FALSE and p12 TRUE
// Assume input is normalized and get signexp
// Normalize input just in case
// Form exponent bias
modff:
{ .mfi
getf.exp modf_signexp = f8
fnorm MODF_NORM_F8 = f8
addl modf_GR_FFFF = 0xffff, r0
}
// Get integer part of input
// Form exponent mask
{ .mfi
nop.m 999
fcvt.fx.trunc.s1 MODF_INT_INTEGER_PART = f8
mov modf_17_ones = 0x1ffff ;;
}
// Is x nan or inf?
// qnan snan inf norm unorm 0 -+
// 1 1 1 0 0 0 11 = 0xe3 NAN_INF
// Form biased exponent where input only has an integer part
{ .mfi
nop.m 999
fclass.m.unc p6,p13 = f8, 0xe3
addl modf_GR_no_frac = 0x10016, r0 ;;
}
// Mask to get exponent
// Is x unnorm?
// qnan snan inf norm unorm 0 -+
// 0 0 0 0 1 0 11 = 0x0b UNORM
// Set p13 to indicate calculation path, else p6 if nan or inf
{ .mfi
and modf_exp = modf_17_ones, modf_signexp
fclass.m.unc p8,p0 = f8, 0x0b
nop.i 999 ;;
}
// p11 <== SMALL, no integer part, fraction is everyting
// p9 <== HUGE, no fraction part, integer is everything
// p12 <== NORMAL, fraction part and integer part
{ .mii
(p13) cmp.lt.unc p11,p10 = modf_exp, modf_GR_FFFF
nop.i 999
nop.i 999 ;;
}
// Is x inf? p6 if inf, p7 if nan
{ .mfb
(p10) cmp.ge.unc p9,p12 = modf_exp, modf_GR_no_frac
(p6) fclass.m.unc p6,p7 = f8, 0x23
(p8) br.cond.spnt L(MODF_DENORM) ;;
}
L(MODF_COMMON):
// For HUGE set fraction to signed 0
{ .mfi
nop.m 999
(p9) fmerge.s f8 = f8,f0
nop.i 999
}
// For HUGE set integer part to normalized input
{ .mfi
nop.m 999
(p9) fnorm.s MODF_INTEGER_PART = MODF_NORM_F8
nop.i 999 ;;
}
// For SMALL set fraction to normalized input, integer part to signed 0
{ .mfi
nop.m 999
(p11) fmerge.s MODF_INTEGER_PART = f8,f0
nop.i 999
}
{ .mfi
nop.m 999
(p11) fnorm.s f8 = MODF_NORM_F8
nop.i 999 ;;
}
// For NORMAL float the integer part
{ .mfi
nop.m 999
(p12) fcvt.xf MODF_INTEGER_PART = MODF_INT_INTEGER_PART
nop.i 999 ;;
}
// If x inf set integer part to INF, fraction to signed 0
{ .mfi
(p6) stfs [r33] = MODF_NORM_F8
(p6) fmerge.s f8 = f8,f0
nop.i 999 ;;
}
// If x nan set integer and fraction parts to NaN (quietized)
{ .mfi
(p7) stfs [r33] = MODF_NORM_F8
(p7) fmerge.s f8 = MODF_NORM_F8, MODF_NORM_F8
nop.i 999 ;;
}
{ .mmi
(p9) stfs [r33] = MODF_INTEGER_PART
nop.m 999
nop.i 999 ;;
}
// For NORMAL compute fraction part
{ .mfi
(p11) stfs [r33] = MODF_INTEGER_PART
(p12) fms.s.s0 f8 = MODF_NORM_F8,f1, MODF_INTEGER_PART
nop.i 999 ;;
}
// For NORMAL test if fraction part is zero; if so append correct sign
{ .mfi
nop.m 999
(p12) fcmp.eq.unc p7,p0 = MODF_NORM_F8, MODF_INTEGER_PART
nop.i 999 ;;
}
{ .mfi
(p12) stfs [r33] = MODF_INTEGER_PART
nop.f 999
nop.i 999 ;;
}
// For NORMAL if fraction part is zero append sign of input
{ .mfb
nop.m 999
(p7) fmerge.s f8 = MODF_NORM_F8, f0
br.ret.sptk b0 ;;
}
L(MODF_DENORM):
// If x unorm get signexp from normalized input
// If x unorm get integer part from normalized input
{ .mfi
getf.exp modf_signexp = MODF_NORM_F8
fcvt.fx.trunc.s1 MODF_INT_INTEGER_PART = MODF_NORM_F8
nop.i 999 ;;
}
// If x unorm mask to get exponent
{ .mmi
and modf_exp = modf_17_ones, modf_signexp ;;
cmp.lt.unc p11,p10 = modf_exp, modf_GR_FFFF
nop.i 999 ;;
}
{ .mfb
(p10) cmp.ge.unc p9,p12 = modf_exp, modf_GR_no_frac
nop.f 999
br.cond.spnt L(MODF_COMMON) ;;
}
.endp modff
ASM_SIZE_DIRECTIVE(modff)