From f215e02bf85f68d3a6106c2a1f4f7f063f819064 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Thu, 11 Apr 2024 10:17:27 +0200 Subject: Adding upstream version 7.0.14-dfsg. Signed-off-by: Daniel Baumann --- src/libs/softfloat-3e/source/f64_to_f32.c | 88 +++++++++++++++++++++++++++++++ 1 file changed, 88 insertions(+) create mode 100644 src/libs/softfloat-3e/source/f64_to_f32.c (limited to 'src/libs/softfloat-3e/source/f64_to_f32.c') diff --git a/src/libs/softfloat-3e/source/f64_to_f32.c b/src/libs/softfloat-3e/source/f64_to_f32.c new file mode 100644 index 00000000..80989609 --- /dev/null +++ b/src/libs/softfloat-3e/source/f64_to_f32.c @@ -0,0 +1,88 @@ + +/*============================================================================ + +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 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 +#include +#include "platform.h" +#include "internals.h" +#include "specialize.h" +#include "softfloat.h" + +float32_t f64_to_f32( float64_t a SOFTFLOAT_STATE_DECL_COMMA ) +{ + union ui64_f64 uA; + uint_fast64_t uiA; + bool sign; + int_fast16_t exp; + uint_fast64_t frac; + struct commonNaN commonNaN; + uint_fast32_t uiZ, frac32; + union ui32_f32 uZ; + + /*------------------------------------------------------------------------ + *------------------------------------------------------------------------*/ + uA.f = a; + uiA = uA.ui; + sign = signF64UI( uiA ); + exp = expF64UI( uiA ); + frac = fracF64UI( uiA ); + /*------------------------------------------------------------------------ + *------------------------------------------------------------------------*/ + if ( exp == 0x7FF ) { + if ( frac ) { + softfloat_f64UIToCommonNaN( uiA, &commonNaN SOFTFLOAT_STATE_ARG_COMMA ); + uiZ = softfloat_commonNaNToF32UI( &commonNaN ); + } else { + uiZ = packToF32UI( sign, 0xFF, 0 ); + } + goto uiZ; + } + /*------------------------------------------------------------------------ + *------------------------------------------------------------------------*/ + frac32 = softfloat_shortShiftRightJam64( frac, 22 ); + if ( ! (exp | frac32) ) { + uiZ = packToF32UI( sign, 0, 0 ); + goto uiZ; + } + /*------------------------------------------------------------------------ + *------------------------------------------------------------------------*/ + return softfloat_roundPackToF32( sign, exp - 0x381, frac32 | 0x40000000 SOFTFLOAT_STATE_ARG_COMMA ); + uiZ: + uZ.ui = uiZ; + return uZ.f; + +} + -- cgit v1.2.3