| |
| #include <stdbool.h> |
| #include <stdint.h> |
| #include "platform.h" |
| #include "internals.h" |
| #include "specialize.h" |
| #include "softfloat.h" |
| |
| uint_fast16_t f128_classify( float128_t a ) |
| { |
| union ui128_f128 uA; |
| uint_fast64_t uiA64, uiA0; |
| |
| uA.f = a; |
| uiA64 = uA.ui.v64; |
| uiA0 = uA.ui.v0; |
| |
| uint_fast16_t infOrNaN = expF128UI64( uiA64 ) == 0x7FFF; |
| uint_fast16_t subnormalOrZero = expF128UI64( uiA64 ) == 0; |
| bool sign = signF128UI64( uiA64 ); |
| bool fracZero = fracF128UI64( uiA64 ) == 0 && uiA0 == 0; |
| bool isNaN = isNaNF128UI( uiA64, uiA0 ); |
| bool isSNaN = softfloat_isSigNaNF128UI( uiA64, uiA0 ); |
| |
| return |
| ( sign && infOrNaN && fracZero ) << 0 | |
| ( sign && !infOrNaN && !subnormalOrZero ) << 1 | |
| ( sign && subnormalOrZero && !fracZero ) << 2 | |
| ( sign && subnormalOrZero && fracZero ) << 3 | |
| ( !sign && infOrNaN && fracZero ) << 7 | |
| ( !sign && !infOrNaN && !subnormalOrZero ) << 6 | |
| ( !sign && subnormalOrZero && !fracZero ) << 5 | |
| ( !sign && subnormalOrZero && fracZero ) << 4 | |
| ( isNaN && isSNaN ) << 8 | |
| ( isNaN && !isSNaN ) << 9; |
| } |
| |