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/* Copyright (c) 2002 Michael Stumpf <mistumpf@de.pepperl-fuchs.com>
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Copyright (c) 2006 Dmitry Xmelkov
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in
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the documentation and/or other materials provided with the
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* Neither the name of the copyright holders nor the names of
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contributors may be used to endorse or promote products derived
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from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE. */
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/* $Id: fp_mintl.S,v 1.1 2007/01/14 14:53:45 dmix Exp $ */
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/* float __fp_mintl (<non-standart>);
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Normalize value by shifting to left (only left) and merge parts of
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float value. Mainly, this function is intended for integral values,
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as a last stage of functions floor(), floatsisf(). Its functionality
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is very restricted: no subnormals, no rounding, no Inf/NaN.
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rA2.rA1.rA0 - mantissa
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rA3.rA2.rA1.rA0 - float value
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* Underflow of exponent is NOT checked: result would undefined.
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* In zero case mantissa must be 0.
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* Sign bit is set in any case. -0.0 is possible.
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* Shifts are optimized for speed.
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; mantissa is 0x00XXXX
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or rA2, rA1 ; to obtain N flag (rA2 was 0)
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; mantissa is 0x0000XX
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; low mantissa byte != 0
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or rA2, rA0 ; to obtain N flag (rA2 was 0)
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.L_bm: brmi .L_pack ; N flag is from rA2
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; shift to left (1..7 positions)
added
removed
libm/fplib/fp_mintl.S
