On 2018-05-02 19:36 +0800, yiliang chen wrote: > Since "fdiv" can be used in Intel dialect and att dialect, Why not use "fdiv" instead of "fdivs"？ I don't know. The "fdivs" is just written by Uros. CC him here. I didn't find the rules about inline assembly in GCC coding convention. On 2018-05-02 19:26 +0800, Xi Ruoyao wrote: > On 2018-05-02 18:47 +0800, yiliang chen wrote: > > hi, When I compile Gcc with MSYS2 on Windows.I have encountered a thorny > > issue. > > > > In order to output the Intel assembly file by default, I modified the > > gcc/config/i386/i386.opt file as follows > > > > masm= > > Target RejectNegative Joined Enum(asm_dialect) Var(ix86_asm_dialect) > > Init(ASM_INTEL) > > Use given assembler dialect. > > > > however, An error occurred when compiling to > > libgcc/config/i386/sfp-exceptions.c > > file， it tell me : > > > > C:\MSYS\MSYS32\tmp\cctIKXUx.s: Assembler messages: > > C:\MSYS\MSYS32\tmp\cctIKXUx.s:69: Error: no such instruction: `fdivs DWORD > > PTR [esp]' > > C:\MSYS\MSYS32\tmp\cctIKXUx.s:135: Error: no such instruction: `fdivs DWORD > > PTR [esp]' > > > > I checked Intel's developer's manual，I can't find a description of this > > directive. So I want to know what's going on. > > "fdivs" should be "fdiv" in intel dialect. > > This instruction is in an inline assembly statement > (libgcc/config/i386/sfp-exceptions.c:103). GCC don't know how to convert it > to Intel dialect. -- Xi Ruoyao <ryxi@xxxxxxxxxxxxxxxxx> School of Aerospace Science and Technology, Xidian University
