| commit | 34b9cc076ff423023a779a04a9f7cd7c17372cbf | |
| author | Joseph Myers <joseph@codesourcery.com> | |
| Wed, 13 May 2020 23:50:19 +0000 (13 23:50 +0000) | ||
| committer | Paolo Bonzini <pbonzini@redhat.com> | |
| Wed, 10 Jun 2020 16:10:24 +0000 (10 12:10 -0400) | ||
| tree | da8938f804746da92052eebfe180c67b473d885a | treesnapshot (tar.gz zip) |
| parent | 80b4008c805ebcfd4c0d302ac31c1689e34571e0 | commitdiff |
target/i386: fix fxam handling of invalid encodings
The fxam implementation does not check for invalid encodings, instead
treating them like NaN or normal numbers depending on the exponent.
Fix it to check that the high bit of the significand is set before
treating an encoding as NaN or normal, thus resulting in correct
handling (all of C0, C2 and C3 cleared) for invalid encodings.
Signed-off-by: Joseph Myers <joseph@codesourcery.com>
Message-Id: <alpine.DEB.2.21.2005132349311.11687@digraph.polyomino.org.uk>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
The fxam implementation does not check for invalid encodings, instead
treating them like NaN or normal numbers depending on the exponent.
Fix it to check that the high bit of the significand is set before
treating an encoding as NaN or normal, thus resulting in correct
handling (all of C0, C2 and C3 cleared) for invalid encodings.
Signed-off-by: Joseph Myers <joseph@codesourcery.com>
Message-Id: <alpine.DEB.2.21.2005132349311.11687@digraph.polyomino.org.uk>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
| target/i386/fpu_helper.c | diffblobblamehistory | |
| tests/tcg/i386/test-i386-fxam.c | [new file with mode: 0644] | blob |