X86 Serializing Instructions
This table contains an alphabetical list of compiler options. For a list of compiler options by category, see the Compiler options listed by category article.
Compiler options
X86-64 Instructions Set CPU instructions. The general-purpose instructions perform basic data movement, arithmetic, logic, program flow, and string operations which programmers commonly use to write application and system software to run on Intel 64 and IA-32 processors. To aid in speculation control, make LFENCE a serializing instruction since it has less overhead than MFENCE. This is done by setting bit 1 of MSR 0xc0011029 (DECFG). Some families that support LFENCE do not have this MSR. For these families, the LFENCE instruction is already serializing. Signed-off-by: Tom Lendacky.
| Option | Purpose |
|---|---|
| @ | Specifies a response file. |
| /? | Lists the compiler options. |
| /AI | Specifies a directory to search to resolve file references passed to the #using directive. |
| /analyze | Enable code analysis. |
| /arch | Specifies the architecture for code generation. |
| /await | Enable coroutines (resumable functions) extensions. |
| /bigobj | Increases the number of addressable sections in an .obj file. |
| /C | Preserves comments during preprocessing. |
| /c | Compiles without linking. |
| /cgthreads | Specifies number of cl.exe threads to use for optimization and code generation. |
| /clr | Produces an output file to run on the common language runtime. |
| /constexpr | Control constexpr evaluation at compile time. |
| /D | Defines constants and macros. |
| /diagnostics | Controls the format of diagnostic messages. |
| /doc | Process documentation comments to an XML file. |
| /E | Copies preprocessor output to standard output. |
| /EH | Specifies the model of exception handling. |
| /EP | Copies preprocessor output to standard output. |
| /errorReport | Deprecated. Error reporting is controlled by Windows Error Reporting (WER) settings. |
| /execution-charset | Set the execution character set. |
| /experimental:module | Enables experimental module support. |
| /experimental:preprocessor | Enables experimental conforming preprocessor support. |
| /F | Sets stack size. |
| /favor | Produces code optimized for a specific x64 architecture. Or, for the specific micro-architectures in both the AMD64 and EM64T architectures. |
| /FA | Creates a listing file. |
| /Fa | Sets the listing file name. |
| /FC | Display full path of source code files passed to cl.exe in diagnostic text. |
| /Fd | Renames program database file. |
| /Fe | Renames the executable file. |
| /FI | Preprocesses the specified include file. |
| /Fi | Sets the preprocessed output file name. |
| /Fm | Creates a map file. |
| /Fo | Creates an object file. |
| /fp | Specify floating-point behavior. |
| /Fp | Specifies a precompiled header file name. |
| /FR /Fr | Generates browser files. /Fr is deprecated. |
| /FS | Forces serialization of all writes to the program database (PDB) file through MSPDBSRV.EXE. |
| /FU | Forces the use of a file name as if it had been passed to the #using directive. |
| /Fx | Merges injected code with source file. |
| /GA | Optimizes code for Windows application. |
| /Gd | Uses the __cdecl calling convention (x86 only). |
| /Ge | Deprecated. Activates stack probes. |
| /GF | Enables string pooling. |
| /GH | Calls hook function _pexit. |
| /Gh | Calls hook function _penter. |
| /GL | Enables whole program optimization. |
| /Gm | Deprecated. Enables minimal rebuild. |
| /GR | Enables run-time type information (RTTI). |
| /Gr | Uses the __fastcall calling convention (x86 only). |
| /GS | Buffers security check. |
| /Gs | Controls stack probes. |
| /GT | Supports fiber safety for data allocated using static thread-local storage. |
| /guard:cf | Adds control flow guard security checks. |
| /Gv | Uses the __vectorcall calling convention. (x86 and x64 only) |
| /Gw | Enables whole-program global data optimization. |
| /GX | Deprecated. Enables synchronous exception handling. Use /EH instead. |
| /Gy | Enables function-level linking. |
| /GZ | Deprecated. Same as /RTC1. |
| /Gz | Uses the __stdcall calling convention (x86 only). |
| /H | Deprecated. Restricts the length of external (public) names. |
| /HELP | Lists the compiler options. |
| /homeparams | Forces parameters passed in registers to be written to their locations on the stack upon function entry. This compiler option is only for the x64 compilers (native and cross compile). |
| /hotpatch | Creates a hot-patchable image. |
| /I | Searches a directory for include files. |
| /J | Changes the default char type. |
| /JMC | Supports native C++ Just My Code debugging. |
| /kernel | The compiler and linker will create a binary that can be executed in the Windows kernel. |
| /LD | Creates a dynamic-link library. |
| /LDd | Creates a debug dynamic-link library. |
| /link | Passes the specified option to LINK. |
| /LN | Creates an MSIL module. |
| /MD | Creates a multithreaded DLL using MSVCRT.lib. |
| /MDd | Creates a debug multithreaded DLL using MSVCRTD.lib. |
| /MP | Compiles multiple source files by using multiple processes. |
| /MT | Creates a multithreaded executable file using LIBCMT.lib. |
| /MTd | Creates a debug multithreaded executable file using LIBCMTD.lib. |
| /nologo | Suppresses display of sign-on banner. |
| /O1 | Creates small code. |
| /O2 | Creates fast code. |
| /Ob | Controls inline expansion. |
| /Od | Disables optimization. |
| /Og | Deprecated. Uses global optimizations. |
| /Oi | Generates intrinsic functions. |
| /openmp | Enables the #pragma omp directive in source code. |
| /Os | Favors small code. |
| /Ot | Favors fast code. |
| /Ox | A subset of /O2 that doesn't include /GF or /Gy. |
| /Oy | Omits frame pointer (x86 only). |
| /P | Writes preprocessor output to a file. |
| /permissive- | Set standard-conformance mode. |
| /Qfast_transcendentals | Generates fast transcendentals. |
| /QIfist | Deprecated. Suppresses _ftol when a conversion from a floating-point type to an integral type is required (x86 only). |
| /Qimprecise_fwaits | Removes fwait commands inside try blocks. |
| /QIntel-jcc-erratum | Mitigates the performance impact of the Intel JCC erratum microcode update. |
| /Qpar (Auto-Parallelizer) | Enables automatic parallelization of loops that are marked with the #pragma loop() directive. |
| /Qsafe_fp_loads | Uses integer move instructions for floating-point values and disables certain floating point load optimizations. |
| /Qspectre | Specifies compiler generation of instructions to mitigate certain Spectre variant 1 security vulnerabilities. |
| /Qspectre-load | Specifies compiler generation of serializing instructions to mitigate Spectre security vulnerabilities based on load instructions. |
| /Qspectre-load-cf | Specifies compiler generation of serializing instructions to mitigate Spectre security vulnerabilities based on control flow instructions that load memory. |
| /Qvec-report (Auto-Vectorizer Reporting Level) | Enables reporting levels for automatic vectorization. |
| /RTC | Enables run-time error checking. |
| /sdl | Enables additional security features and warnings. |
| /showIncludes | Displays a list of include files during compilation. |
| /source-charset | Set source character set. |
| /std | C++ standard version compatibility selector. |
| /Tc | Specifies a C source file. |
| /TC | Specifies all source files are C. |
| /Tp | Specifies a C++ source file. |
| /TP | Specifies all source files are C++. |
| /U | Removes a predefined macro. |
| /u | Removes all predefined macros. |
| /utf-8 | Set source and execution character sets to UTF-8. |
| /V | Deprecated. Sets the .obj file version string. |
| /validate-charset | Validate UTF-8 files for only compatible characters. |
| /vd | Suppresses or enables hidden vtordisp class members. |
| /vmb | Uses best base for pointers to members. |
| /vmg | Uses full generality for pointers to members. |
| /vmm | Declares multiple inheritance. |
| /vms | Declares single inheritance. |
| /vmv | Declares virtual inheritance. |
| /volatile | Selects how the volatile keyword is interpreted. |
| /w | Disables all warnings. |
| /W0, /W1, /W2, /W3, /W4 | Sets which warning level to output. |
| /w1, /w2, /w3, /w4 | Sets the warning level for the specified warning. |
| /Wall | Enables all warnings, including warnings that are disabled by default. |
| /wd | Disables the specified warning. |
| /we | Treats the specified warning as an error. |
| /WL | Enables one-line diagnostics for error and warning messages when compiling C++ source code from the command line. |
| /wo | Displays the specified warning only once. |
| /Wp64 | Obsolete. Detects 64-bit portability problems. |
| /Wv | Displays no warnings introduced after the specified version of the compiler. |
| /WX | Treats all warnings as errors. |
| /X | Ignores the standard include directory. |
| /Y- | Ignores all other precompiled-header compiler options in the current build. |
| /Yc | Creates a precompiled header file. |
| /Yd | Deprecated. Places complete debugging information in all object files. Use /Zi instead. |
| /Yl | Injects a PCH reference when creating a debug library |
| /Yu | Uses a precompiled header file during build. |
| /Z7 | Generates C 7.0-compatible debugging information. |
| /Za | Disables language extensions. |
| /Zc | Specifies standard behavior under /Ze./Za, /Ze (Disable Language Extensions) |
| /Ze | Deprecated. Enables language extensions. |
| /Zf | Improves PDB generation time in parallel builds. |
| /Zg | Removed in Visual Studio 2015. Generates function prototypes. |
| /ZH | Specifies MD5, SHA-1, or SHA-256 for checksums in debug info. |
| /ZI | Includes debug information in a program database compatible with Edit and Continue. |
| /Zi | Generates complete debugging information. |
| /Zl | Removes default library name from .obj file (x86 only). |
| /Zm | Specifies the precompiled header memory allocation limit. |
| /Zo | Generates enhanced debugging information for optimized code. |
| /Zp | Packs structure members. |
| /Zs | Checks syntax only. |
| /ZW | Produces an output file to run on the Windows Runtime. |
See also
MSVC compiler options
MSVC compiler command-line syntax
X86 serializing instructions January 18, 2018 X86 serializing instructionsDownload Read Online The Time Stamp Counter is a 64-bit register present on all x86 processors The programmer can solve this problem by inserting a serializing instruction, I've used intrinsics to write some simple SIMD code for SSE2, and they're pretty handy. They map pretty closely to the assembler output, and generally give enough It is ordered with respect to serializing instructions such as CPUID, WRMSR, OUT, and MOV CR.
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This instruction's operation is the same in non-64-bit modes and 64-bit Architectures Software Developer's Manual: Intel® 64 and IA-32, Vol. 2A: instruction set reference, A-M The Intel 64 and IA-32 architectures define several serializing instructions. These instructions force the To aid in speculation control, the LFENCE instruction will be turned into a serializing instruction. There is less performance impact using LFENCE Processor Flags. The x86 processors have a large set of flags that represent the state of the processor, and the conditional jump instructions can key off of them in CIS 451 Lab 8: X86 (IA32) differences.
To the best of my knowledge, cpuid is the only serializing instruction for IA32 that can be run in 'user' mode. Therefore, the mfence instruction is simply 'required' here on x86, unless you know all of the tricks (rcu-smr, hint, hint) and any serializing instructions Living on the Edge: Rapid-Toggling Probes with Cross-Modi?cation on x86 Buddhika Chamith Bo Joel Svensson Luke Dalessandro Ryan R. Newton Indiana University x86/cpu/AMD: Make LFENCE a serializing instruction To aid in speculation control, make LFENCE a serializing instruction since it has less overhead than MFENCE.
X86/cpu/AMD: Make LFENCE a serializing instruction To aid in speculation control, make LFENCE a serializing instruction since it has less overhead than MFENCE. Performs a serializing operation on all load-from-memory and store-to-memory instructions that were issued prior the MFENCE instruction.
Description; Performs a serializing operation on all load-from-memory and store-to-memory instructions that were issued prior the MFENCE instruction. Performs a serializing operation on all store-to-memory instructions that were issued prior the SFENCE instruction.
This serializing operation guarantees that every,.