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Date: Tue, 20 Nov 2007 22:17:34 +0200
From: "Blue Swirl" <blauwirbel@gmail.com>
Subject: Re: [Qemu-devel] qemu fpu/softfloat-specialize.h fpu/softfloat.c...
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To: qemu-devel@nongnu.org, paul@nowt.org

On 11/18/07, Paul Brook <paul@nowt.org> wrote:
> CVSROOT:        /sources/qemu
> Module name:    qemu
> Changes by:     Paul Brook <pbrook>     07/11/18 14:33:24
>
> Modified files:
>         fpu            : softfloat-specialize.h softfloat.c softfloat.h
>         target-arm/nwfpe: double_cpdo.c single_cpdo.c
>         target-m68k    : helper.c op.c
>         target-mips    : op_helper.c
>
> Log message:
>         Add strict checking mode for softfp code.

This commit has broken sparc-softmmu, for example Aurora 1.0 normally prints:
Running anaconda - please wait...
Probing for video card:   Sun TCX (8bit)
Probing for monitor type: Unable to probe
Probing for mouse type:   Sun - Mouse

After this commit:
Running anaconda - please wait...
Traceback (innermost last):
  File "/usr/bin/anaconda", line 67, in ?
    import dispatch
  File "/usr/lib/anaconda/dispatch.py", line 29, in ?
    from bootloader import writeBootloader, bootloaderSetupChoices
  File "/usr/lib/anaconda/bootloader.py", line 21, in ?
    import whrandom
  File "/usr/lib/python1.5/whrandom.py", line 140, in ?
    _inst = whrandom()
  File "/usr/lib/python1.5/whrandom.py", line 46, in __init__
    self.seed(x, y, z)
  File "/usr/lib/python1.5/whrandom.py", line 59, in seed
    t = long(time.time() * 256)
IOError: [Errno 2] No such file or directory
install exited abnormally
sending termination signals...done
sending kill signals...done
disabling swap...
unmounting filesystems...
        /mnt/runtime done
        disabling /dev/loop0
        /proc/openprom done
        /proc done
        /dev/pts done
        /mnt/source done
ejecting /tmp/cdrom...
you may safely reboot your system


This and a couple similar changes look suspicious:
                   && ( (sbits64) ( zSig + roundIncrement ) < 0 ) )
            ) {
             float_raise( float_flag_overflow | float_flag_inexact STATUS_VAR);
-            return packFloat64( zSign, 0x7FF, 0 ) - ( roundIncrement == 0 );
+            return packFloat64( zSign, 0x7FF, - ( roundIncrement == 0 ));
         }
         if ( zExp < 0 ) {
             isTiny =