Jonas Paulsson ea92283449 [SystemZ] Implement ISD::BITCAST for fp128 -> i128. ...

The type legalizer has by default no method of doing this bitcast other than
storing and reloading the value from stack.

This patch implements a custom lowering of this operation using extractions
of subregs (z13 and earlier using FP128 register pairs), or of vector
elements (with 'vector enhancements 1' using VR128 FP registers).

Review: Ulrich Weigand

Differential Revision: https://reviews.llvm.org/D110346

2021-09-24 10:26:45 +02:00

2.8 KiB

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