[B2-devel] SheepShaver FPU emulation accuracy

[Gwenole B. <gb....@fr...>]

Hi,

I have just committed code that will provide much improved FPU=20
emulation when PPC_ENABLE_FPU_EXCEPTIONS is set to 1. This is currently=20=

disabled because (i) slow down factor is 3 vs. the previous code, (ii)=20=

I have yet to find out a real Mac application that would benefit from=20
it. Does anyone know about one?

Testing was largely covered by VEX's jm-ppc-test slightly modified to=20
check more FPSCR flags and more values coverage. The glibc test-arith,=20=

test-arithf, test-float, test-double tests also all pass. This is for=20
ppc. For x86_64, this is mostly complete provided you use gcc >=3D =
4.0.1.=20
Some errors remain with fma related instructions and a few test-double=20=

tests.

Note that testing was only done with linux/ppc test programs. Again, if=20=

someone knows of a real Mac application that would benefit from precise=20=

exception bits, please tell.

Thanks,
Gwenol=E9.=