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| author | Joseph Myers | 2020-06-18 01:24:29 +0200 |
|---|---|---|
| committer | Paolo Bonzini | 2020-06-26 15:39:39 +0200 |
| commit | 1f18a1e6ab8368a4eab2d22894d3b2ae75250cd3 (patch) | |
| tree | 74f4efb45983d3373128b282ddd31c2fb6689391 /balloon.c | |
| parent | target/i386: reimplement fyl2xp1 using floatx80 operations (diff) | |
| download | qemu-1f18a1e6ab8368a4eab2d22894d3b2ae75250cd3.tar.gz qemu-1f18a1e6ab8368a4eab2d22894d3b2ae75250cd3.tar.xz qemu-1f18a1e6ab8368a4eab2d22894d3b2ae75250cd3.zip | |
target/i386: reimplement fyl2x using floatx80 operations
The x87 fyl2x emulation is currently based around conversion to
double. This is inherently unsuitable for a good emulation of any
floatx80 operation. Reimplement using the soft-float operations,
building on top of the reimplementation of fyl2xp1 and factoring out
code to be shared between the two instructions.
The included test assumes that the result in round-to-nearest mode
should always be one of the two closest floating-point numbers to the
mathematically exact result (including that it should be exact, in the
exact cases which cover more cases than for fyl2xp1).
Signed-off-by: Joseph Myers <joseph@codesourcery.com>
Message-Id: <alpine.DEB.2.21.2006172321530.20587@digraph.polyomino.org.uk>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'balloon.c')
0 files changed, 0 insertions, 0 deletions