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Diffstat (limited to 'src/libs/softfloat-3e/source/s_normRoundPackMToF128M.c')
-rw-r--r-- | src/libs/softfloat-3e/source/s_normRoundPackMToF128M.c | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/src/libs/softfloat-3e/source/s_normRoundPackMToF128M.c b/src/libs/softfloat-3e/source/s_normRoundPackMToF128M.c new file mode 100644 index 00000000..db3b4c0a --- /dev/null +++ b/src/libs/softfloat-3e/source/s_normRoundPackMToF128M.c @@ -0,0 +1,73 @@ + +/*============================================================================ + +This C source file is part of the SoftFloat IEEE Floating-Point Arithmetic +Package, Release 3e, by John R. Hauser. + +Copyright 2011, 2012, 2013, 2014, 2015, 2016 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 SOFTFLOAT_STATE_DECL_COMMA ) +{ + const uint32_t *ptr; + int_fast16_t shiftDist; + uint32_t wordSig; + + ptr = extSigPtr + indexWordHi( 5 ); + shiftDist = 0; + for (;;) { + wordSig = *ptr; + if ( wordSig ) break; + shiftDist += 32; + if ( 160 <= shiftDist ) { + 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; + } + shiftDist += softfloat_countLeadingZeros32( wordSig ) - 15; + if ( shiftDist ) { + exp -= shiftDist; + softfloat_shiftLeft160M( extSigPtr, shiftDist, extSigPtr ); + } + softfloat_roundPackMToF128M( sign, exp, extSigPtr, zWPtr SOFTFLOAT_STATE_ARG_COMMA ); + +} + |