[PATCH] D69193: [compiler-rt][builtins][PowerPC] Fix __fixunstfti builtin on PowerPC

[Baptiste Saleil via Phabricator via llvm-commits]

bsaleil created this revision.
bsaleil added reviewers: hfinkel, echristo, masoud.ataei, renenkel, nemanjai, lei, amyk.
Herald added subscribers: llvm-commits, Sanitizers, steven.zhang, shchenz, jsji, kbarton, dberris.
Herald added projects: Sanitizers, LLVM.

This patch fixes __fixunstfti builtin for PowerPC.
This builtin converts a long double (IBM double-double) to an unsigned 128 bit integer.

The patch allows the builtin to handle a previously unhandled case in which a negative low double may impact the result of the conversion.

@masoud.ataei and @renenkel helped me to fix this builtin and to generate additional tests to test the builtin using negative low doubles.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D69193

Files:
  compiler-rt/lib/builtins/ppc/fixunstfti.c
  compiler-rt/test/builtins/Unit/ppc/fixunstfti_test.h

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