llvm-6502

mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-01-23 02:32:11 +00:00

History

Lang Hames 58c62e1dba [ADT] Fix PR20728 - Incorrect APFloat::fusedMultiplyAdd results for x86_fp80.

As detailed at http://llvm.org/PR20728, due to an internal overflow in
APFloat::multiplySignificand the APFloat::fusedMultiplyAdd method can return
incorrect results for x87DoubleExtended (x86_fp80) values. This commonly
manifests as incorrect constant folding of libm fmal calls on x86. E.g.

fmal(1.0L, 1.0L, 3.0L) == 0.0L      (should be 4.0L)

This patch fixes PR20728 by adding an extra bit to the significand for
intermediate results of APFloat::multiplySignificand, avoiding the overflow.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222374 91177308-0d34-0410-b5e6-96231b3b80d8

2014-11-19 19:15:41 +00:00

ADT

[ADT] Fix PR20728 - Incorrect APFloat::fusedMultiplyAdd results for x86_fp80.

2014-11-19 19:15:41 +00:00

Analysis

CallGraphTest.cpp: Remove invalid tests. ++S might step over F if S == F.

2014-11-18 12:23:19 +00:00

Bitcode

[Bitcode] AtEndOfStream should only check against the size if it's known.

2014-11-13 00:08:41 +00:00

CodeGen

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