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21eeec9981
based on the Grisu1 algorithm. This corrects several precision issues
with the previous code used to perform such conversions (patch by
Max Nazhalov, mantis #25241)
o adaptation of several tests to deal with the better precision of these
routines compared to the previous version
Please don't remove the real2str.inc file yet, it's still used by the
JVM target for now
git-svn-id: trunk@25888 -
43 lines
1.1 KiB
ObjectPascal
43 lines
1.1 KiB
ObjectPascal
{ %version=1.1 }
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{ Source provided for Free Pascal Bug Report 2129 }
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{ Submitted by "Bill Rayer" on 2002-09-18 }
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{ e-mail: lingolanguage@hotmail.com }
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(*
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Comp() cast has different effect in FPC.
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Compiles using Delphi4:
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dcc32 -CC fpc19
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Compiles in FPC 1.0.6:
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ppc386 -WC fpc19
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When run, the Delphi version shows -6.5E+18, but the FPC version
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shows zero. In Delphi, the comp() cast actually moves 8 bytes from
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the double into the comp without converting the data, but FPC uses
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floating point instructions to convert the data and therefore prints
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zero.
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In Delphi, if you want to convert a double to a float, you just use
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the assignment "comp1 := dbl1" which corresponds to the FLD/FIST
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opcodes. FPC should not use the comp() cast for doing this, since
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it introduces a subtle incompatibility with Delphi.
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*)
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program fpc19;
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{ the same as tw2129.pp for cpu's were comp = int64 }
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var
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comp1 : comp;
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dbl1 : double;
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s : string;
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begin
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{$ifdef cpui386}
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dbl1 := -1e-128;
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comp1 := comp(dbl1);
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str(comp1:23,s);
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if s<>' 0.00000000000000E+0000' then
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begin
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writeln('error: ',s);
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halt(1);
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end;
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{$endif cpui386}
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end.
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