I\'m doing a research for my University related to an Image reconstruction algorithm for medical usage.
Greetings. I\'m trying to approximate the function Log10[x^k0 + k1], where .21 < k0 < 21, 0 < k1 < ~2000, and x is integer < 2^14.
I see a code as below: #include \"stdio.h\" #define VECTOR_SIZE4 typedef float v4sf __attribute__ ((vector_size(sizeof(float)*VECTOR_SIZE)));
Suppose I have an array: uint8_t arr[256]; and an element __m128i x containing 16 bytes, x_1, x_2, ... x_16
int u1, u2; unsigned long elm1[20], _mulpre[16][20], res1[40], res2[40]; 64 bits long res1, res2 initialized to zero.
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
Let me preface this with.. I have extremely limited experience with ASM, and even less with SIMD. But it happens that I have the following MMX/SSE optimised code, that I would like to port across to
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
加载中,请稍侯......