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c++ Programming Glossary: asmWhat is a good easy to use profiler for C++ on Linux? http://stackoverflow.com/questions/1168766/what-is-a-good-easy-to-use-profiler-for-c-on-linux you can double click any function to dive into source or asm code. Build with debugging information g to see your source..
How do you implement Coroutines in C++ http://stackoverflow.com/questions/121757/how-do-you-implement-coroutines-in-c can be done with out a problem. All you need is a little asm to move the call stack to a newly allocated stack on the heap...
C++ try/throw/catch => machine code http://stackoverflow.com/questions/1331220/c-try-throw-catch-machine-code between MSVC and g big or small Please show me some pseudo asm IA 32 is ok too so I never have to check it out myself Edit..
Understanding stack frame of function call in C/C++? [closed] http://stackoverflow.com/questions/16088040/understanding-stack-frame-of-function-call-in-c-c at the generated assembly be sure to pass S fverbose asm to your gcc command. See also the linux assembly howto . I gave..
Convert inline assembly code to C++ http://stackoverflow.com/questions/16142284/convert-inline-assembly-code-to-c m_argsEnd int arr 1000 i 0 while ptr begin int val ptr __asm push val void functionAddress m_functionAddress call the function.. calling convention switch resultType case voidType __asm call functionAddress break case pointerType case int32Type.. functionAddress break case pointerType case int32Type __asm call functionAddress mov ebx resultBuffer mov dword ptr ebx..
does presence of mutex help getting rid of volatile key word ? http://stackoverflow.com/questions/1616093/does-presence-of-mutex-help-getting-rid-of-volatile-key-word lock function thus preventing evaluation or you call some asm memory barrier instructions ie that are wrapped in inline functions..
get human readable AST from c++ code http://stackoverflow.com/questions/17388771/get-human-readable-ast-from-c-code It looks like clang had this feature in the past emit asm but it has removed. Is there an easy way to do this today c..
modular arithmetics and NTT (finite field DFT) optimizations http://stackoverflow.com/questions/18577076/modular-arithmetics-and-ntt-finite-field-dft-optimizations modmul DWORD a DWORD b DWORD _a _b _p _a a _b b _p p asm mov eax _a mov ebx _b mul ebx H edx L eax eax ebx mov ebx _p..
C/C++ function definitions without assembly http://stackoverflow.com/questions/2442966/c-c-function-definitions-without-assembly That deep in the bowels of stdio.h is buried some asm code that actually tells CPU what to do. For example in dos.. architectures it will get you to linux arch x86 include asm unistd_32.h #define __NR_write 4 The only thing left to look..
How do I find where an exception was thrown in C++? http://stackoverflow.com/questions/2443135/how-do-i-find-where-an-exception-was-thrown-in-c This structure mirrors the one found in usr include asm ucontext.h typedef struct _sig_ucontext unsigned long uc_flags..
What is the fastest way to compute sin and cos together? http://stackoverflow.com/questions/2683588/what-is-the-fastest-way-to-compute-sin-and-cos-together summarize the answers so far Vlad said that there is the asm command FSINCOS computing both of them in almost the same time..
http://stackoverflow.com/questions/2901694/programatically-detect-number-of-physical-processors-cores-or-if-hyper-threading unsigned regs 4 #ifdef _WIN32 __cpuid int regs int i #else asm volatile cpuid a regs 0 b regs 1 c regs 2 d regs 3 a i c 0 ECX..
Fastest way to get the integer part of sqrt(n)? http://stackoverflow.com/questions/4930307/fastest-way-to-get-the-integer-part-of-sqrtn in math.h or cmath If possible you can write the code in asm block also. c c algorithm math performance share improve..
Optimizations for pow() with const non-integer exponent? http://stackoverflow.com/questions/6475373/optimizations-for-pow-with-const-non-integer-exponent vg n ret Reinterpret arg as integer to obtain logarithm. asm cvtdq2ps 1 0 x ret x ret std printf log vg n ret Multiply logarithm.. powered vg n ret Convert back to integer to exponentiate. asm cvtps2dq 1 0 x ret x ret std printf result vg n ret return ret.. vg n ret Reinterpret arg as integer to obtain logarithm. asm cvtdq2ps 1 0 x ret x ret std printf log vg n ret Multiply logarithm..
http://stackoverflow.com/questions/661338/sse-sse2-and-sse3-for-gnu-c warning but they do rightly treat SIMD whether used via asm intrinsics or compiler vectorization as just one part of the..
Embed assembler to manipulate 64-bit registers in portable C++ http://stackoverflow.com/questions/7859568/embed-assembler-to-manipulate-64-bit-registers-in-portable-c too int BNASM_AddScalar DWORD result DWORD x int carry 0 __asm mov ebx result xor eax eax mov ecx x add ebx ecx adc carry eax.. int BNASM_AddScalar DWORD result DWORD x int carry 0 asm volatile addl ecx edx n adcl 0 eax n Return the carry flag a..
C++ Tips for code optimization on ARM devices http://stackoverflow.com/questions/10800372/c-tips-for-code-optimization-on-arm-devices and can be nearly as fast as writing hand tuned ASM code. 6 Use the cache prefetch hint PLD to speed up looping.. trust the compiler to generate good code. Look at the ASM output and rewrite hotspots in ASM. For bit byte manipulation.. good code. Look at the ASM output and rewrite hotspots in ASM. For bit byte manipulation the C language can't specify things..
Calling a C++ function pointer on a specific object instance http://stackoverflow.com/questions/151418/calling-a-c-function-pointer-on-a-specific-object-instance you'd expect of a real delegate and compiles down to a few ASM instructions in most cases. The accompanying article is a good..
Smart pointer wrapping penalty. Memoization with std::map http://stackoverflow.com/questions/15963563/smart-pointer-wrapping-penalty-memoization-with-stdmap T NOINLINE void test const T p volatile auto anti_opti 0 ASM_MARKER tag 0 anti_opti p data anti_opti p data ASM_MARKER tag.. 0 ASM_MARKER tag 0 anti_opti p data anti_opti p data ASM_MARKER tag 1 void anti_opti test 1000 new Foo ASM code of test.. p data ASM_MARKER tag 1 void anti_opti test 1000 new Foo ASM code of test when T is Foo is don't be scared I have diff below..
Branchless code that maps zero, negative, and positive to 0, 1, 2 http://stackoverflow.com/questions/1610836/branchless-code-that-maps-zero-negative-and-positive-to-0-1-2 return diff diff 31 1 But I'm guessing there's no standard ASM instruction for . Also the can be replaced with depending on..
How can you pull a value from a register? http://stackoverflow.com/questions/19285656/how-can-you-pull-a-value-from-a-register trying to figure out how to pull a register value from an ASM instruction and into a variable in C . For example MOV DWORD..
http://stackoverflow.com/questions/2247447/usefulness-of-signaling-nan float value during initialization. If you were writing in ASM this would not be an issue. but in C and especially in C I think..
ptr->hello(); /* VERSUS */ (*ptr).hello(); http://stackoverflow.com/questions/447543/ptr-hello-versus-ptr-hello to type. In terms of the instructions generated at the ASM level there's no difference. In fact in some languages D comes..
How to call an external program with parameters? http://stackoverflow.com/questions/486087/how-to-call-an-external-program-with-parameters this is more easily done in any other language let me know ASM C# Python etc . c c winapi external application share improve..
http://stackoverflow.com/questions/714692/alloca-implementation still referencing things via esp . Here's the resultant ASM 8048454 push ebp 8048455 mov ebp esp 8048457 sub esp 0x28 804845a..
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