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36 #include "gmx_lapack.h"
37 #include "lapack_limits.h"
40 F77_FUNC(sgetrf,SGETRF)(int *m,
50 float minusone = -1.0;
58 mindim = (*m < *n) ? *m : *n;
60 if(DGETRF_BLOCKSIZE>=mindim) {
63 F77_FUNC(sgetf2,SGETF2)(m,n,a,lda,ipiv,info);
69 for(j=1;j<=mindim;j+=DGETRF_BLOCKSIZE) {
70 jb = ( DGETRF_BLOCKSIZE < (mindim-j+1)) ? DGETRF_BLOCKSIZE : (mindim-j+1);
71 /* factor diag. and subdiag blocks and test for singularity */
73 F77_FUNC(sgetf2,SGETF2)(&k,&jb,&(a[(j-1)*(*lda)+(j-1)]),lda,&(ipiv[j-1]),&iinfo);
75 if(*info==0 && iinfo>0)
76 *info = iinfo + j - 1;
78 /* adjust pivot indices */
79 k = (*m < (j+jb-1)) ? *m : (j+jb-1);
83 /* Apply to columns 1 throughj j-1 */
87 F77_FUNC(slaswp,SLASWP)(&k,a,lda,&j,&i,ipiv,&l);
89 /* Apply to cols. j+jb through n */
93 F77_FUNC(slaswp,SLASWP)(&k,&(a[(j+jb-1)*(*lda)+0]),lda,&j,&i,ipiv,&l);
94 /* Compute block row of U */
96 F77_FUNC(strsm,STRSM)("Left","Lower","No transpose","Unit",&jb,&k,&one,
97 &(a[(j-1)*(*lda)+(j-1)]),lda,&(a[(j+jb-1)*(*lda)+(j-1)]),lda);
100 /* Update trailing submatrix */
103 F77_FUNC(sgemm,SGEMM)("No transpose","No transpose",&k,&i,&jb,&minusone,
104 &(a[(j-1)*(*lda)+(j+jb-1)]),lda,
105 &(a[(j+jb-1)*(*lda)+(j-1)]),lda,&one,
106 &(a[(j+jb-1)*(*lda)+(j+jb-1)]),lda);