https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79678
Bug ID: 79678
Summary: x86 (and other?) SIMD builtins have signedness issues
Product: gcc
Version: 6.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: jbeulich at novell dot com
Target Milestone: ---
At least builtins clearly acting on and/or returning packed unsigned data
should have parameter/return types derived from unsigned ones. Beside requiring
needless casts, even trivial things like "__builtin_ia32_pmaxub128() > 0"
otherwise produce wrong code.
Similarly builtins acting on signed 8-bit quantities should not have
parameter/return types derived from plain char.
