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| author | Andrew Waterman <waterman@s141.Millennium.Berkeley.EDU> | 2011-06-19 21:45:58 -0700 |
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| committer | Andrew Waterman <waterman@s141.Millennium.Berkeley.EDU> | 2011-06-19 21:45:58 -0700 |
| commit | 1e163c715550e20e239976a22e00869884713e54 (patch) | |
| tree | dbcf7b10e35421c72758df098057014fef7ffff7 /softfloat/s_roundPackToI32.c | |
| parent | 0edaecc54329048eb91ad6a45338265ef1a4569c (diff) | |
| download | riscv-pk-1e163c715550e20e239976a22e00869884713e54.zip riscv-pk-1e163c715550e20e239976a22e00869884713e54.tar.gz riscv-pk-1e163c715550e20e239976a22e00869884713e54.tar.bz2 | |
fixed build after repo split
Diffstat (limited to 'softfloat/s_roundPackToI32.c')
| -rwxr-xr-x | softfloat/s_roundPackToI32.c | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/softfloat/s_roundPackToI32.c b/softfloat/s_roundPackToI32.c new file mode 100755 index 0000000..1c91497 --- /dev/null +++ b/softfloat/s_roundPackToI32.c @@ -0,0 +1,48 @@ + +#include <stdbool.h> +#include <stdint.h> +#include "platform.h" +#include "internals.h" +#include "softfloat.h" + +int_fast32_t + softfloat_roundPackToI32( + bool sign, uint_fast64_t sig, int_fast8_t roundingMode, bool exact ) +{ + bool roundNearestEven; + int roundIncrement, roundBits; + uint_fast32_t sig32; + union { uint32_t ui; int32_t i; } uZ; + int_fast32_t z; + + roundNearestEven = ( roundingMode == softfloat_round_nearest_even ); + roundIncrement = 0x40; + if ( + ! roundNearestEven + && ( roundingMode != softfloat_round_nearest_maxMag ) + ) { + roundIncrement = + ( roundingMode == softfloat_round_minMag ) + || ( roundingMode + == ( sign ? softfloat_round_max : softfloat_round_min ) ) + ? 0 + : 0x7F; + } + roundBits = sig & 0x7F; + sig += roundIncrement; + if ( sig & UINT64_C( 0xFFFFFF8000000000 ) ) goto invalid; + sig32 = sig>>7; + sig32 &= ~ ( ! ( roundBits ^ 0x40 ) & roundNearestEven ); + uZ.ui = sign ? - sig32 : sig32; + z = uZ.i; + if ( z && ( ( z < 0 ) ^ sign ) ) goto invalid; + if ( exact && roundBits ) { + softfloat_exceptionFlags |= softfloat_flag_inexact; + } + return z; + invalid: + softfloat_raiseFlags( softfloat_flag_invalid ); + return sign ? -0x7FFFFFFF - 1 : 0x7FFFFFFF; + +} + |