| commit | 9ecaf5ccec13ff2e8fe1e72f6e0f3367d2169c1c | |
| author | Joseph Myers <joseph@codesourcery.com> | |
| Mon, 4 May 2020 23:40:20 +0000 (4 23:40 +0000) | ||
| committer | Richard Henderson <richard.henderson@linaro.org> | |
| Fri, 15 May 2020 18:04:50 +0000 (15 11:04 -0700) | ||
| tree | b51a6862e2ea9ddeaf179d2526de717ffa336c66 | treesnapshot (tar.gz zip) |
| parent | be53fa785ab766d2722628403edee75b3e6ab599 | commitdiff |
softfloat: fix floatx80 pseudo-denormal round to integer
The softfloat function floatx80_round_to_int incorrectly handles the
case of a pseudo-denormal where only the high bit of the significand
is set, ignoring that bit (treating the number as an exact zero)
rather than treating the number as an alternative representation of
+/- 2^-16382 (which may round to +/- 1 depending on the rounding mode)
as hardware does. Fix this check (simplifying the code in the
process).
Signed-off-by: Joseph Myers <joseph@codesourcery.com>
Message-Id: <alpine.DEB.2.21.2005042339420.22972@digraph.polyomino.org.uk>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
The softfloat function floatx80_round_to_int incorrectly handles the
case of a pseudo-denormal where only the high bit of the significand
is set, ignoring that bit (treating the number as an exact zero)
rather than treating the number as an alternative representation of
+/- 2^-16382 (which may round to +/- 1 depending on the rounding mode)
as hardware does. Fix this check (simplifying the code in the
process).
Signed-off-by: Joseph Myers <joseph@codesourcery.com>
Message-Id: <alpine.DEB.2.21.2005042339420.22972@digraph.polyomino.org.uk>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
| fpu/softfloat.c | diffblobblamehistory | |
| tests/tcg/i386/test-i386-pseudo-denormal.c | diffblobblamehistory |