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Re: [PATCH] Update sparc ULPs.
- From: Andreas Schwab <schwab at linux-m68k dot org>
- To: David Miller <davem at davemloft dot net>
- Cc: joseph at codesourcery dot com, libc-alpha at sourceware dot org
- Date: Fri, 16 Nov 2012 13:11:48 +0100
- Subject: Re: [PATCH] Update sparc ULPs.
- References: <Pine.LNX.4.64.1209241254140.23802@digraph.polyomino.org.uk><20120924.135523.2105566314867619791.davem@davemloft.net><Pine.LNX.4.64.1209241940230.31396@digraph.polyomino.org.uk><20121116.012126.1183281920754085320.davem@davemloft.net>
David Miller <davem@davemloft.net> writes:
> What I really don't understand is why ldbl-128ibm's variant of this
> code doesn't trigger this same problem on powerpc testsuite runs.
> Either it is happening (and therefore ldbl-128ibm/s_log1pl.c needs a
> similar change to this) or powerpc isn't generating the exceptions.
IBM long double cannot represent 0x1p-8189L, so this test is skipped.
ppc is also seeing spurious underflows:
Failure: Real part of: clog10 (0x1.00000000000000123456789abcp0 + 0x1.23456789p-1000 i) == 4.285899851347756186652871946325962330640e-19 + 4.611541215247321502041995872887317363241e-302 i: Exception "Underflow" set
Failure: Real part of: clog10 (0x0.fffffffffffff8p0 + 0x0.fffffffffffff8p-1000 i) == -4.821637332766435821255375046554377090472e-17 + 4.053112396770095089737411317782466262176e-302 i: Exception "Underflow" set
But here it is generated in atan2.
Andreas.
--
Andreas Schwab, schwab@linux-m68k.org
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