# Student Resources

The purpose of this page is to share useful information that can help groups with their game projects.

## BLAS Documentation --- This section is a work in progress -- please do not edit [jboelen]

Note: This information applies to the gsl_cblas library

There are 2 main functions to use

### segmv<ref>http://publib.boulder.ibm.com/infocenter/comphelp/v8v101/index.jsp?topic=%2Fcom.ibm.xlcpp8a.doc%2Fproguide%2Fref%2Fblaslib.htm</ref>

void cblas_sgemv (const enum CBLAS_ORDER order, const enum CBLAS_TRANSPOSE TransA, const int M, const int N, const float alpha, const float * A, const int lda, const float * x, const int incx, const float beta, float * y, const int incy)<ref>http://www.gnu.org/software/gsl/manual/html_node/Level-2-CBLAS-Functions.html</ref>

m

represents:
the number of rows in input matrix a
the length of vector y, if 'N' or 'n' is used for the trans parameter
the length of vector x, if 'T' or 't' is used for the trans parameter
The number of rows must be greater than or equal to zero, and less than the leading dimension of the matrix a (specified in lda)

n

represents:
the number of columns in input matrix a
the length of vector x, if 'N' or 'n' is used for the trans parameter
the length of vector y, if 'T' or 't' is used for the trans parameter
The number of columns must be greater than or equal to zero.

alpha

is the scaling constant for matrix a

a

is the input matrix of float (for sgemv) or double (for dgemv) values

lda

is the leading dimension of the array specified by a. The leading dimension must be greater than zero. The leading dimension must be greater than or equal to 1 and greater than or equal to the value specified in m.

x

is the input vector of float (for sgemv) or double (for dgemv) values.

incx

is the stride for vector x. It can have any value.

beta

is the scaling constant for vector y

y

is the output vector of float (for sgemv) or double (for dgemv) values.

incy

is the stride for vector y. It must not be zero.

## Getting Started on Mac

#### Troubleshooting

Problem with CUDA driver version 5.0.24 on MacBook Pro 2012 Fix