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Diffstat (limited to 'lib/libutils/isoc/arch/arm/softfloat/source/s_normRoundPackMToF128M.c')
-rw-r--r-- | lib/libutils/isoc/arch/arm/softfloat/source/s_normRoundPackMToF128M.c | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/lib/libutils/isoc/arch/arm/softfloat/source/s_normRoundPackMToF128M.c b/lib/libutils/isoc/arch/arm/softfloat/source/s_normRoundPackMToF128M.c new file mode 100644 index 0000000..0064cc2 --- /dev/null +++ b/lib/libutils/isoc/arch/arm/softfloat/source/s_normRoundPackMToF128M.c @@ -0,0 +1,73 @@ + +/*============================================================================ + +This C source file is part of the SoftFloat IEEE Floating-Point Arithmetic +Package, Release 3a, by John R. Hauser. + +Copyright 2011, 2012, 2013, 2014 The Regents of the University of California. +All rights reserved. + +Redistribution and use in source and binary forms, with or without +modification, are permitted provided that the following conditions are met: + + 1. Redistributions of source code must retain the above copyright notice, + this list of conditions, and the following disclaimer. + + 2. 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. + + 3. Neither the name of the University nor the names of its contributors may + be used to endorse or promote products derived from this software without + specific prior written permission. + +THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 THE REGENTS OR 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. + +=============================================================================*/ + +#include <stdbool.h> +#include <stdint.h> +#include "platform.h" +#include "internals.h" + +void + softfloat_normRoundPackMToF128M( + bool sign, int32_t exp, uint32_t *extSigPtr, uint32_t *zWPtr ) +{ + const uint32_t *ptr; + int_fast16_t shiftCount; + uint32_t wordSig; + + ptr = extSigPtr + indexWordHi( 5 ); + shiftCount = 0; + for (;;) { + wordSig = *ptr; + if ( wordSig ) break; + shiftCount += 32; + if ( 160 <= shiftCount ) { + zWPtr[indexWordHi( 4 )] = packToF128UI96( sign, 0, 0 ); + zWPtr[indexWord( 4, 2 )] = 0; + zWPtr[indexWord( 4, 1 )] = 0; + zWPtr[indexWord( 4, 0 )] = 0; + return; + } + ptr -= wordIncr; + } + shiftCount += softfloat_countLeadingZeros32( wordSig ) - 15; + if ( shiftCount ) { + exp -= shiftCount; + softfloat_shiftLeft160M( extSigPtr, shiftCount, extSigPtr ); + } + softfloat_roundPackMToF128M( sign, exp, extSigPtr, zWPtr ); + +} + |