Hello,
I'm dealing with the following code (from ZenGL library), targeting OSX
---------------
{$mode delphi}
procedure m_SinCos( Angle : Single; out s, c : Single ); assembler;
asm
FLD Angle
FSINCOS
FSTP [EDX]
FSTP [EAX]
end;
var
s,c: single;
begin
m_SinCos(0,s,c);
end.
---------------
The latest Xcode 7.0 tools does recognize the generated assembler (fpc
trunk):
---------
# [5] FLD Angle
flds 8(%ebp)
# [6] FSINCOS
fsincos
# [7] FSTP [EDX]
fstp (%edx)
# [8] FSTP [EAX]
fstp (%eax)
---------
as a problem:
Assembling program
test.s:21:2: error: ambiguous instructions require an explicit suffix
(could be 'fstps', 'fstpl', or 'fstpt')
fstp (%edx)
^
test.s:23:2: error: ambiguous instructions require an explicit suffix
(could be 'fstps', 'fstpl', or 'fstpt')
fstp (%eax)
One interested could search the internet for the problem encountered with
other platforms, and find out that the newer clang is somewhat backward
incompatible.
My first attempt was to replace to put the suggested FSTPS instruction in
place:
FSTPS [EDX]
However, the compiler stopped me, complaining about "FSTPS" is not a
recognized instruction.
The next approach was to rewrite the function into at&t syntax. (The actual
implementation could be found at sincos() of RTL math unit).
Is it a yet to be developed feature for FPC to satisfy demands of external
tools relies on?
I presume since the compiler parses intel asm and translates it into at&t
asm, it should take into consideration requirements of the latest osx
building tools.
Or is it already supported and I'm just missing a compiler switch?
thanks,
Dmitry
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