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</o:shapelayout></xml><![endif]--></head><body lang=FR link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>I think the correct solution for you is to use explicit size information:<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> FSTP SINGLE PTR [EDX]<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> FSTP SINGLE PTR [EAX]<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>but<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> FSTP [s]<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>and<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> FSTP [c] <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>would be even better, I don’t know if this syntax is Delphi compatible or not.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> It seems that indeed Free Pascal does not set the size of those instruction, <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>but seems to use single as default size for internal code generation…<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> When generating assembler file for GNU assembler or NASM,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>it does not seem to print out this “assumed” size, which indeed<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>leads to a failure using –Anasm option on trunk compiler with i386-win32 target.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> My GNU as version 2.26 does not seem to need an explicit size,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>but I don’t know what Xcode uses, isn’t it also a GNU assembler?<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Could you tell us which assembler is used?<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Pierre<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div style='border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm 4.0pt'><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>De :</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> fpc-pascal-bounces@lists.freepascal.org [mailto:fpc-pascal-bounces@lists.freepascal.org] <b>De la part de</b> Dmitry Boyarintsev<br><b>Envoyé :</b> mercredi 4 mai 2016 02:28<br><b>À :</b> FPC-Pascal users discussions<br><b>Objet :</b> [fpc-pascal] intel vs att asm (fstp instruction) (osx/clang features)<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>Hello,<o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>I'm dealing with the following code (from ZenGL library), targeting OSX<o:p></o:p></p></div><div><p class=MsoNormal>---------------<o:p></o:p></p></div><div><p class=MsoNormal>{$mode delphi}<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>procedure m_SinCos( Angle : Single; out s, c : Single ); assembler; <o:p></o:p></p></div><div><p class=MsoNormal>asm<o:p></o:p></p></div><div><p class=MsoNormal> FLD Angle<o:p></o:p></p></div><div><p class=MsoNormal> FSINCOS<o:p></o:p></p></div><div><p class=MsoNormal> FSTP [EDX]<o:p></o:p></p></div><div><p class=MsoNormal> FSTP [EAX]<o:p></o:p></p></div><div><p class=MsoNormal>end;<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>var<o:p></o:p></p></div><div><p class=MsoNormal> s,c: single;<o:p></o:p></p></div><div><p class=MsoNormal>begin<o:p></o:p></p></div><div><p class=MsoNormal> m_SinCos(0,s,c);<o:p></o:p></p></div><div><p class=MsoNormal>end.<o:p></o:p></p></div><div><p class=MsoNormal>---------------<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>The latest Xcode 7.0 tools does recognize the generated assembler (fpc trunk):<o:p></o:p></p></div><div><p class=MsoNormal>---------<o:p></o:p></p></div><div><p class=MsoNormal># [5] FLD Angle<o:p></o:p></p></div><div><p class=MsoNormal> flds 8(%ebp)<o:p></o:p></p></div><div><p class=MsoNormal># [6] FSINCOS<o:p></o:p></p></div><div><p class=MsoNormal> fsincos<o:p></o:p></p></div><div><p class=MsoNormal># [7] FSTP [EDX]<o:p></o:p></p></div><div><p class=MsoNormal> fstp (%edx)<o:p></o:p></p></div><div><p class=MsoNormal># [8] FSTP [EAX]<o:p></o:p></p></div><div><p class=MsoNormal> fstp (%eax) <o:p></o:p></p></div><div><p class=MsoNormal>---------<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>as a problem:<o:p></o:p></p></div><div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Assembling program<o:p></o:p></p></div><div><p class=MsoNormal>test.s:21:2: error: ambiguous instructions require an explicit suffix (could be 'fstps', 'fstpl', or 'fstpt')<o:p></o:p></p></div><div><p class=MsoNormal> fstp (%edx)<o:p></o:p></p></div><div><p class=MsoNormal> ^<o:p></o:p></p></div><div><p class=MsoNormal>test.s:23:2: error: ambiguous instructions require an explicit suffix (could be 'fstps', 'fstpl', or 'fstpt')<o:p></o:p></p></div><div><p class=MsoNormal> fstp (%eax)<o:p></o:p></p></div></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>One interested could search the internet for the problem encountered with other platforms, and find out that the newer clang is somewhat backward incompatible.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>My first attempt was to replace to put the suggested FSTPS instruction in place:<o:p></o:p></p></div><div><p class=MsoNormal>FSTPS [EDX]<o:p></o:p></p></div><div><p class=MsoNormal>However, the compiler stopped me, complaining about "FSTPS" is not a recognized instruction.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>The next approach was to rewrite the function into at&t syntax. (The actual implementation could be found at sincos() of RTL math unit).<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Is it a yet to be developed feature for FPC to satisfy demands of external tools relies on?<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>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. <o:p></o:p></p></div><div><p class=MsoNormal>Or is it already supported and I'm just missing a compiler switch?<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>thanks,<o:p></o:p></p></div><div><p class=MsoNormal>Dmitry<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div></div></div></div></body></html>