Ana Pazos
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9a3dc3e60b
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[LegalizeTypes] Expand FNEG to bitwise op for IEEE FP types
Summary:
Except for custom floating point types x86_fp80 and ppc_fp128,
expand Y = FNEG(X) to Y = X ^ sign mask to avoid library call.
Using bitwise operation can improve code size and performance.
Reviewers: efriedma
Reviewed By: efriedma
Subscribers: efriedma, kpn, arsenm, eli.friedman, javed.absar, rbar, johnrusso, simoncook, sabuasal, niosHD, zzheng, edward-jones, rogfer01, MartinMosbeck, brucehoult, the_o, PkmX, jocewei, asb, llvm-commits
Differential Revision: https://reviews.llvm.org/D57875
llvm-svn: 353757
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2019-02-11 22:10:08 +00:00 |