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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_roundPackToF32.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_roundPackToF32.c')
-rwxr-xr-x | softfloat/s_roundPackToF32.c | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/softfloat/s_roundPackToF32.c b/softfloat/s_roundPackToF32.c new file mode 100755 index 0000000..11764f1 --- /dev/null +++ b/softfloat/s_roundPackToF32.c @@ -0,0 +1,65 @@ + +#include <stdbool.h> +#include <stdint.h> +#include "platform.h" +#include "primitives.h" +#include "internals.h" +#include "softfloat.h" + +float32_t + softfloat_roundPackToF32( bool sign, int_fast16_t exp, uint_fast32_t sig ) +{ + int roundingMode; + bool roundNearestEven; + int roundIncrement, roundBits; + bool isTiny; + uint_fast32_t uiZ; + union ui32_f32 uZ; + + roundingMode = softfloat_roundingMode; + 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; + if ( 0xFD <= (uint16_t) exp ) { + if ( exp < 0 ) { + isTiny = + ( softfloat_detectTininess + == softfloat_tininess_beforeRounding ) + || ( exp < -1 ) + || ( sig + roundIncrement < 0x80000000 ); + sig = softfloat_shift32RightJam( sig, - exp ); + exp = 0; + roundBits = sig & 0x7F; + if ( isTiny && roundBits ) { + softfloat_raiseFlags( softfloat_flag_underflow ); + } + } else if ( + ( 0xFD < exp ) || ( 0x80000000 <= sig + roundIncrement ) + ) { + softfloat_raiseFlags( + softfloat_flag_overflow | softfloat_flag_inexact ); + uiZ = packToF32UI( sign, 0xFF, 0 ) - ! roundIncrement; + goto uiZ; + } + } + if ( roundBits ) softfloat_exceptionFlags |= softfloat_flag_inexact; + sig = ( sig + roundIncrement )>>7; + sig &= ~ ( ! ( roundBits ^ 0x40 ) & roundNearestEven ); + uiZ = packToF32UI( sign, sig ? exp : 0, sig ); + uiZ: + uZ.ui = uiZ; + return uZ.f; + +} + |