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A comment on Can We Solve Linear Algebra Problems at Extreme Scale and Low Precisions?. Parent comment

Re:Can We Solve Linear Algebra Problems at Extreme Scale and... by gpderetta on Friday September 17, 2021 @10:44AM (#28566043)
I assume double-double would be the emulated __float128 type in GCC (or hand written equivalent)? Can GCC vectorize it or it needs to be done by hand?
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Re:Can We Solve Linear Algebra Problems at Extreme Scale and... by jcranmer on Friday September 17, 2021 @11:47AM (#28566851)
__float128 is emulated quad-precision, I think.
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Re:Can We Solve Linear Algebra Problems at Extreme Scale and... by gpderetta on Friday September 17, 2021 @12:04PM (#28567080)
Not exactly, the mantissa is increased, but the exponent is the same as standard double precision, so it is not an IEEE quad.
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