2016.4.2 BLAS基本知识
Level 1
Vector operations, e.g. y = /alpha x + y 向量操作
Level 2
Matrix-vector operations, e.g. y = /alpha A x + /beta y 矩阵与向量操作
Level 3
Matrix-matrix operations, e.g. C = /alpha A B + C 矩阵与矩阵的操作
Each routine has a name which specifies the operation, the type of matrices involved and their precisions. Some of the most common operations and their names are given below,
DOT
scalar product, x^T y
AXPY
vector sum, /alpha x + y
MV
matrix-vector product, A x
SV
matrix-vector solve, inv(A) x
MM
matrix-matrix product, A B
SM
matrix-matrix solve, inv(A) B
The type of matrices are,
GE
general
GB
general band
SY
symmetric
SB
symmetric band
SP
symmetric packed
HE
hermitian
HB
hermitian band
HP
hermitian packed
TR
triangular
TB
triangular band
TP
triangular packed
Each operation is defined for four precisions,
S
single real
D
double real
C
single complex
Z
double complex
Thus, for example, the name SGEMM stands for "single-precision general matrix-matrix multiply" and ZGEMM stands for "double-precision complex matrix-matrix multiply".
因此，例如，命名为SGEMM的函数意思为“单精度普通矩阵乘法”，ZGEMM为“双精度复数矩阵乘法”。
更多的，可以参考：http://www.netlib.org/blas/blasqr.pdf
参考资料：
http://blog.csdn.net/chlele0105/article/details/21954687
基本介绍
http://blog.csdn.net/g_spider/article/details/6054990
基本介绍
http://www.cs.ubc.ca/~mpf/bcls/files.html
C源代码
https://www.gnu.org/software/gsl/manual/html_node/GSL-CBLAS-Library.html#GSL-CBLAS-Library
GNU的blas
http://www.netlib.org/blas/
blas介绍网站
http://www.netlib.org/blas/blasqr.pdf
函数接口文档
https://dahuasky.wordpress.com/2009/08/15/%E5%85%B3%E4%BA%8E%E9%AB%98%E6%80%A7%E8%83%BD%E6%95%B0%E5%80%BC%E8%BF%90%E7%AE%97/
一位过来人简单总结的经验
http://www.netlib.org/blas/blast-forum/blast-forum.html
BLAS Technical Forum（推荐）
http://www.tat.physik.uni-tuebingen.de/~kley/lehre/ftn77/tutorial/blas.html
对于BLAS的简单介绍，主要面对fortran
https://developer.apple.com/library/mac/documentation/Accelerate/Reference/BLAS_Ref/index.html
apple的对于blas的实现，文档详细！（推荐）