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macpas.pp disables floating-point exceptions for powerpc targets only

Original Reporter info from Mantis: Adriaan van Os
  • Reporter name: Adriaan van Os

Description:

macpas.pp has the following init code

{$ifdef cpupowerpc}
{$ifndef FPUNONE}
begin
  asm
    mtfsfi 6,1
  end;
{$endif}
{$endif cpupowerpc}
end.

This disables floating-point exceptions for the powerpc only. However, given the many bugs in Mac OS X, floating-point exceptions have to be disabled for intel code also.

As an example, I recently got an EXC_ARITHMETIC exception inside CoreAudio in MusicDeviceMIDIEvent, on a CoreDuo MacBook Pro running Mac OS X 10.5.2. The crash was worked around by including the Math unit and calling SetExceptionMask([exInvalidOp, exDenormalized, exZeroDivide, exOverflow, exUnderflow, exPrecision]) at the start of the application.

Additional information:

svn fpc trunk revision 11218

Mantis conversion info:

  • Mantis ID: 11516
  • Version: 2.3.1
  • Fixed in version: 2.2.4
  • Fixed in revision: 12148 (#8356cd89)
  • Target version: 2.2.4
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