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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_addMagsF64.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_addMagsF64.c')
-rwxr-xr-x | softfloat/s_addMagsF64.c | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/softfloat/s_addMagsF64.c b/softfloat/s_addMagsF64.c new file mode 100755 index 0000000..a81c3e4 --- /dev/null +++ b/softfloat/s_addMagsF64.c @@ -0,0 +1,77 @@ + +#include <stdbool.h> +#include <stdint.h> +#include "platform.h" +#include "primitives.h" +#include "internals.h" +#include "specialize.h" + +float64_t + softfloat_addMagsF64( uint_fast64_t uiA, uint_fast64_t uiB, bool signZ ) +{ + int_fast16_t expA; + uint_fast64_t sigA; + int_fast16_t expB; + uint_fast64_t sigB; + int_fast16_t expDiff; + uint_fast64_t uiZ; + int_fast16_t expZ; + uint_fast64_t sigZ; + union ui64_f64 uZ; + + expA = expF64UI( uiA ); + sigA = fracF64UI( uiA ); + expB = expF64UI( uiB ); + sigB = fracF64UI( uiB ); + expDiff = expA - expB; + sigA <<= 9; + sigB <<= 9; + if ( ! expDiff ) { + if ( expA == 0x7FF ) { + if ( sigA | sigB ) goto propagateNaN; + uiZ = uiA; + goto uiZ; + } + if ( ! expA ) { + uiZ = + packToF64UI( + signZ, 0, ( uiA + uiB ) & UINT64_C( 0x7FFFFFFFFFFFFFFF ) ); + goto uiZ; + } + expZ = expA; + sigZ = UINT64_C( 0x4000000000000000 ) + sigA + sigB; + } else { + if ( expDiff < 0 ) { + if ( expB == 0x7FF ) { + if ( sigB ) goto propagateNaN; + uiZ = packToF64UI( signZ, 0x7FF, 0 ); + goto uiZ; + } + expZ = expB; + sigA += expA ? UINT64_C( 0x2000000000000000 ) : sigA; + sigA = softfloat_shift64RightJam( sigA, - expDiff ); + } else { + if ( expA == 0x7FF ) { + if ( sigA ) goto propagateNaN; + uiZ = uiA; + goto uiZ; + } + expZ = expA; + sigB += expB ? UINT64_C( 0x2000000000000000 ) : sigB; + sigB = softfloat_shift64RightJam( sigB, expDiff ); + } + sigZ = UINT64_C( 0x2000000000000000 ) + sigA + sigB; + if ( sigZ < UINT64_C( 0x4000000000000000 ) ) { + --expZ; + sigZ <<= 1; + } + } + return softfloat_roundPackToF64( signZ, expZ, sigZ ); + propagateNaN: + uiZ = softfloat_propagateNaNF64UI( uiA, uiB ); + uiZ: + uZ.ui = uiZ; + return uZ.f; + +} + |