For example, if you use -msse4, does this imply that it will also use -mssse3, -msse3, -msse2 and so on or do you have to explicitly add those flag开发者_开发问答s as well?You only need the highest le
Two related questions. This is what my code needs to do with fairly large amount of data. It is done inside inner loops and the performance is important.
The following loop is executed hundreds of times. elma and elmc are both unsigned long (64-bit) arrays, so is res1 and res2.
I am using the following union declaration in SSE2. typedef unsigned long uli; typedef uli v4si __attribute__ ((vector_size(16)));
I\'m trying to optimize my cod开发者_如何学Goe using SSE intrinsics but am running into a problem where I don\'t know of a good way to extract the integer values from a vector after I\'ve done the SSE
I\'m trying to understand how shifting with SSE works, but I don\'t understand the output gdb gives me. Using SSE4 I have a 128bit vector holding 8 16bit unsigned integers (using uint16_t). Then I use
I am optimizing some code for an Intel x86 Nehalem micro-architecture using SSE intrinsics. A portion of my program computes 4 dot products and adds each result to the previous 开发者_C百科values in
I am trying to 开发者_StackOverflowmultiply two vectors together where each element of one vector is multiplied by the element in the same index at the other vector.I then want to sum all the elements
I\'m compiling a bit of code using the following settings in VC++2010:/O2 /Ob2 /Oi /Ot However I\'m having some trouble understanding some parts of the assembly generated, I have put some questions i
I Want to optimize the following function using SIMD (SSE2 & such): int64_t fun(int64_t N, int size, int* p)
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