Level 3: matrix-matrix subroutines include:
| SGEMM, DGEMM, CGEMM, ZGEMM | Perform matrix-matrix operations on general matrices |
| SSYMM, DSYMM,CSYMM, ZSYMM | Perform matrix-matrix operations on symmetrical matrices |
| CHEMM,ZHEMM | Perform matrix-matrix operations on Hermitian matrices |
| SSYRK, DSYRK,CSYRK, ZSYRK | Perform symmetric rank k operations |
| CHERK, ZHERK | Perform Hermitian rank k operations |
| SSYR2K, DSYR2K, CSYR2K, ZSYR2K | Perform symmetric rank 2k operations |
| CHER2K,ZHER2K | Perform Hermitian rank 2k operations |
| STRMM, DTRMM,CTRMM, ZTRMM, | Perform matrix-matrix operations on triangular matrixes |
| STRSM, DTRSM, CTRSM, ZTRSM | Solve certain matrix equations |