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Diffstat (limited to 'softfloat/f16_to_i8.c')
| -rw-r--r-- | softfloat/f16_to_i8.c | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/softfloat/f16_to_i8.c b/softfloat/f16_to_i8.c new file mode 100644 index 0000000..9f0f537 --- /dev/null +++ b/softfloat/f16_to_i8.c @@ -0,0 +1,55 @@ + +/*============================================================================ + +This C source file is part of the SoftFloat IEEE Floating-Point Arithmetic +Package, Release 3d, by John R. Hauser. + +Copyright 2011, 2012, 2013, 2014, 2015, 2016, 2017 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 <stdint.h> +#include "specialize.h" +#include "softfloat.h" + +int_fast8_t f16_to_i8( float16_t a, uint_fast8_t roundingMode, bool exact ) +{ + int_fast32_t sig32 = f16_to_i32(a, roundingMode, exact); + + if (sig32 > INT8_MAX) { + softfloat_exceptionFlags |= softfloat_flag_invalid; + return i8_fromPosOverflow; + } else if (sig32 < INT8_MIN) { + softfloat_exceptionFlags |= softfloat_flag_invalid; + return i8_fromNegOverflow; + } else { + return sig32; + } +} + |