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The HF and BF modes have the same size/precision and neither is a subset nor superset of the other. So, using either __extendhfbf2 or __trunchfbf2 is weird. The expansion apparently emits __extendhfbf2, but on the libgcc side we apparently have __trunchfbf2 implemented. I think it is easier to switch to using what is available rather than adding new entrypoints to libgcc, even alias, because this is backportable. 2024-05-07 Jakub Jelinek <jakub@redhat.com> PR middle-end/114907 * expr.cc (convert_mode_scalar): Use trunc_optab rather than sext_optab for HF->BF conversions. * optabs-libfuncs.cc (gen_trunc_conv_libfunc): Likewise. * gcc.dg/pr114907.c: New test. |
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