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. Try to modify GCC building system, add "-masm=att" in bootstrapping. -- Xi Ruoyao <ryxi@xxxxxxxxxxxxxxxxx> School of Aerospace Science and Technology, Xidian University
