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c++ Programming Glossary: sseFloating point vs integer calculations on modern hardware http://stackoverflow.com/questions/2550281/floating-point-vs-integer-calculations-on-modern-hardware extra performance you might want to look into using the SSE extensions. This can greatly speed up single precision floating.. at once plus there is a separate bank of registers for the SSE operations. I noticed in your second example you used float..
http://stackoverflow.com/questions/661338/sse-sse2-and-sse3-for-gnu-c SSE2 and SSE3 for GNU C Is there a simple tutorial for me to.. SSE2 and SSE3 for GNU C Is there a simple tutorial for me to get.. SSE2 and SSE3 for GNU C Is there a simple tutorial for me to get up to speed..
SSE intrinsic functions reference [closed] http://stackoverflow.com/questions/7156908/sse-intrinsic-functions-reference intrinsic functions reference closed Does anyone know of a.. anyone know of a reference listing the operation of the SSE intrinsic functions for gcc i.e. the functions in the mmintrin.h.. on Intel's AVX technology page but it's equally useful for SSE programming. Go to http software.intel.com en us articles intel..
how to achieve 4 FLOPs per cycle http://stackoverflow.com/questions/8389648/how-to-achieve-4-flops-per-cycle std typedef unsigned long long uint64 double test_dp_mac_SSE double x double y uint64 iterations register __m128d r0 r1 r2.. temp 0 out double temp 1 return out void test_dp_mac_SSE int tds uint64 iterations double sum double malloc tds sizeof.. omp parallel num_threads tds double ret test_dp_mac_SSE 1.1 2.1 iterations sum omp_get_thread_num ret double secs omp_get_wtime..
Why does changing 0.1f to 0 slow down performance by 10x? http://stackoverflow.com/questions/9314534/why-does-changing-0-1f-to-0-slow-down-performance-by-10x faster. This requires that the code be compiled with SSE enabled. This means that rather than using these weird lower..
http://stackoverflow.com/questions/10587598/simd-prefix-sum-on-intel-cpu i ouput.length i ouput i i 2 0 x i ouput i 1 w i 1 1 c sse simd mmx share improve this question The fastest parallel.. sum algorithm I know of is to run over the sum in two passes in parallel and use SSE as well in the second pass. In the.. partial sum to the next partial sum. You can run both passes in parallel using multiple threads e.g. with OpenMP . The second..
SSE instructions to add all elements of an array http://stackoverflow.com/questions/10930595/sse-instructions-to-add-all-elements-of-an-array iostream #include conio.h #include emmintrin.h void sse unsigned char a unsigned char b void main unsigned char arr.. arr 16 for int i 0 i 16 i printf d c next_arr i next_arr i sse arr next_arr getch void sse unsigned char a unsigned char b.. d c next_arr i next_arr i sse arr next_arr getch void sse unsigned char a unsigned char b ..
Debug Assertion Failed! Expression: _BLOCK_TYPE_IS_VALID [closed] http://stackoverflow.com/questions/1102123/debug-assertion-failed-expression-block-type-is-valid Assertion Failed Expression _BLOCK_TYPE_IS_VALID closed I am getting.. closed I am getting this error message Debug Assertion Failed Expression _BLOCK_TYPE_US_VALID pHead nBlockUse.. initWtMag const int UEW const double extInitWt double sse bool operator const NN net const return sse net.sse class Pop..
SSE, intrinsics, and alignment http://stackoverflow.com/questions/12502071/sse-intrinsics-and-alignment Everything worked fine until I started to instatiate classes having the 3D vector as a member with new. I experienced odd.. So I read some articles and figured I need to align the classes owning an instance of the 3D vector class to 16 bytes too... added _MM_ALIGN16 __declspec align 16 in front of the classes like so _MM_ALIGN16 struct Sphere .... Vector3 point float..
Compilation fails with OpenMP on Mac OS X Lion (memcpy and SSE intrinsics) http://stackoverflow.com/questions/12932107/compilation-fails-with-openmp-on-mac-os-x-lion-memcpy-and-sse-intrinsics list. I did not manage to solve the second problem sse intrinsic . Can anyone help me to solve this The questions most.. transformations. This is what is then gets turned into assembly instructions. only those lines that refer to the built ins.. code is linked against. This is also observable in the assembly code that one can obtain by passing S to gcc LBB2_1 movapd..
Why GCC does not use LOAD(without fence) and STORE+SFENCE for std::memory_order_seq_cst? http://stackoverflow.com/questions/19047327/why-gcc-does-not-use-loadwithout-fence-and-storesfence-for-stdmemory-order return b strcpy is a library function that might use newer sse instructions if such are available in runtime. Since sse instructions.. sse instructions if such are available in runtime. Since sse instructions were not available in old processors there is no..
http://stackoverflow.com/questions/5216071/sse-and-c-containers point I really think it must be and alignment issue. c sse memory alignment allocator share improve this question The.. correctly points out a template or prototype value is passed to the std vector constructor which will be copied to all the..
http://stackoverflow.com/questions/586609/using-sse-instructions these instructions are processor specific c optimization assembly processor sse share improve this question SSE instructions.. are processor specific c optimization assembly processor sse share improve this question SSE instructions are processor.. want it as a comment and to check the correctness of your assembler code. Think about using a library like the IPP that implements..
How to check if a CPU supports the SSE3 instruction set? http://stackoverflow.com/questions/6121792/how-to-check-if-a-cpu-supports-the-sse3-instruction-set 2 0x1 false return bSSE3NewInstructions return false c sse instruction set avx cpuid share improve this question I.. _WIN32 Windows #define cpuid __cpuid #else GCC Inline Assembly void cpuid int CPUInfo 4 int InfoType __asm__ __volatile__..
Why artificially limit your code to C? [closed] http://stackoverflow.com/questions/649789/why-artificially-limit-your-code-to-c swap gcc std c99 for g sandiego g g O1 pedantic mfpmath sse DUSE_SSE2 DUSE_XMM3 I src core L usr lib DARCH elf64 D_BSD_SOURCE..
SSE intrinsic functions reference [closed] http://stackoverflow.com/questions/7156908/sse-intrinsic-functions-reference functions in the mmintrin.h header files Thanks. c c gcc sse simd share improve this question As well as all the online..
Using AVX CPU instructions: Poor performance without “/arch:AVX” http://stackoverflow.com/questions/7839925/using-avx-cpu-instructions-poor-performance-without-archavx work for some reason. c performance visual studio 2010 sse avx share improve this question The behavior that you are..
how to achieve 4 FLOPs per cycle http://stackoverflow.com/questions/8389648/how-to-achieve-4-flops-per-cycle Intel cpu As far as I understand it take 3 cycles for an sse add and 5 cycles for a mul to complete on most of the modern.. for packed addpd as well as the scalar addsd versions and sse registers can contain 2 double 's the throughput can be as much.. 2.7 flops cycle. If anyone can contribute a simple c c or assembler programme which demonstrates peak performance that'd be..
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