[llvm-bugs] [Bug 34994] sqrt(denormal float) gives -infinity with fast-math

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=34994

Fangrui Song <i at maskray.me> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED
           Assignee|unassignedbugs at nondot.org   |spatel+llvm at rotateright.com
                 CC|                            |i at maskray.me

--- Comment #19 from Fangrui Song <i at maskray.me> ---
Mark as fixed.

x86-64 and aarch64

% for i in ieee preserve-sign positive-zero; do clang++ a.cc -ffast-math
-fdenormal-fp-math=$i && ./a.out; done
sqrt(1.00000005e-34) = 9.99999984e-18
sqrt(1.00000004e-36) = 1.00000005e-18
sqrt(0) = 0
sqrt(0) = 0
sqrt(0) = 0
sqrt(0) = 0
sqrt(0) = 0
sqrt(1.00000005e-34) = 9.99999984e-18
sqrt(1.00000004e-36) = 1.00000005e-18
sqrt(0) = 0
sqrt(0) = 0
sqrt(0) = 0
sqrt(0) = 0
sqrt(0) = 0
sqrt(1.00000005e-34) = 9.99999984e-18
sqrt(1.00000004e-36) = 1.00000005e-18
sqrt(0) = 0
sqrt(0) = 0
sqrt(0) = 0
sqrt(0) = 0
sqrt(0) = 0

ppc64le (POWER9)

sqrt(1.00000005e-34) = 9.99999984e-18
sqrt(1.00000004e-36) = 1.00000005e-18
sqrt(9.99999935e-39) = 9.99999968e-20
sqrt(9.9999461e-41) = 9.99997303e-21
sqrt(1.0005271e-42) = 1.00026351e-21
sqrt(9.80908925e-45) = 9.90408493e-23
sqrt(0) = 0
sqrt(1.00000005e-34) = 9.99999984e-18
sqrt(1.00000004e-36) = 1.00000005e-18
sqrt(9.99999935e-39) = 9.99999968e-20
sqrt(9.9999461e-41) = 9.99997303e-21
sqrt(1.0005271e-42) = 1.00026351e-21
sqrt(9.80908925e-45) = 9.90408493e-23
sqrt(0) = 0
sqrt(1.00000005e-34) = 9.99999984e-18
sqrt(1.00000004e-36) = 1.00000005e-18
sqrt(9.99999935e-39) = 9.99999968e-20
sqrt(9.9999461e-41) = 9.99997303e-21
sqrt(1.0005271e-42) = 1.00026351e-21
sqrt(9.80908925e-45) = 9.90408493e-23
sqrt(0) = 0

The input constants the 3 arches use are the same.

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