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Implemented fadd, fsub, fmul and ffma for doubles and ffma for floats,
rounding to zero, using a modified implementation from Berkely
Softfloat 3e Library.
Their implementation correctness has been checked with the Berkeley
TestFloat Release 3e tool for x86_64.
v2:
- Reuse util_last_bit64() in _mesa_count_leading_zeros64()
implementation (Connor).
v3:
- Add a specific ffma for floats version (Connor).
- Implement the ffma for doubles version (Andres).
- Lots of fixes in fadd, fsub and fmul (Andres).
- Improved documentation (Andres).
v4:
- Added f64 -> f32 conversion function (Andres).
- Added f32 -> f16 RTZ conversion function (Andres).
Signed-off-by: Samuel Iglesias Gonsálvez <[email protected]>
Signed-off-by: Andres Gomez <[email protected]>
Tested-by: Andres Gomez <[email protected]>
Acked-by: Caio Marcelo de Oliveira Filho <[email protected]>
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