1 /*
2 * cblas_ztbsv.c
3 * The program is a C interface to ztbsv.
4 *
5 * Keita Teranishi 3/23/98
6 *
7 */
8 #include "cblas.h"
9 #include "cblas_f77.h"
cblas_ztbsv(const enum CBLAS_ORDER order,const enum CBLAS_UPLO Uplo,const enum CBLAS_TRANSPOSE TransA,const enum CBLAS_DIAG Diag,const int N,const int K,const void * A,const int lda,void * X,const int incX)10 void cblas_ztbsv(const enum CBLAS_ORDER order, const enum CBLAS_UPLO Uplo,
11 const enum CBLAS_TRANSPOSE TransA, const enum CBLAS_DIAG Diag,
12 const int N, const int K, const void *A, const int lda,
13 void *X, const int incX)
14 {
15 char TA;
16 char UL;
17 char DI;
18 #ifdef F77_CHAR
19 F77_CHAR F77_TA, F77_UL, F77_DI;
20 #else
21 #define F77_TA &TA
22 #define F77_UL &UL
23 #define F77_DI &DI
24 #endif
25 #ifdef F77_INT
26 F77_INT F77_N=N, F77_lda=lda, F77_K=K, F77_incX=incX;
27 #else
28 #define F77_N N
29 #define F77_K K
30 #define F77_lda lda
31 #define F77_incX incX
32 #endif
33 int n, i=0, tincX;
34 double *st=0,*x=(double *)X;
35 extern int CBLAS_CallFromC;
36 extern int RowMajorStrg;
37 RowMajorStrg = 0;
38
39 CBLAS_CallFromC = 1;
40 if (order == CblasColMajor)
41 {
42 if (Uplo == CblasUpper) UL = 'U';
43 else if (Uplo == CblasLower) UL = 'L';
44 else
45 {
46 cblas_xerbla(2, "cblas_ztbsv","Illegal Uplo setting, %d\n", Uplo);
47 CBLAS_CallFromC = 0;
48 RowMajorStrg = 0;
49 return;
50 }
51 if (TransA == CblasNoTrans) TA = 'N';
52 else if (TransA == CblasTrans) TA = 'T';
53 else if (TransA == CblasConjTrans) TA = 'C';
54 else
55 {
56 cblas_xerbla(3, "cblas_ztbsv","Illegal TransA setting, %d\n", TransA);
57 CBLAS_CallFromC = 0;
58 RowMajorStrg = 0;
59 return;
60 }
61 if (Diag == CblasUnit) DI = 'U';
62 else if (Diag == CblasNonUnit) DI = 'N';
63 else
64 {
65 cblas_xerbla(4, "cblas_ztbsv","Illegal Diag setting, %d\n", Diag);
66 CBLAS_CallFromC = 0;
67 RowMajorStrg = 0;
68 return;
69 }
70 #ifdef F77_CHAR
71 F77_UL = C2F_CHAR(&UL);
72 F77_TA = C2F_CHAR(&TA);
73 F77_DI = C2F_CHAR(&DI);
74 #endif
75 F77_ztbsv( F77_UL, F77_TA, F77_DI, &F77_N, &F77_K, A, &F77_lda, X,
76 &F77_incX);
77 }
78 else if (order == CblasRowMajor)
79 {
80 RowMajorStrg = 1;
81 if (Uplo == CblasUpper) UL = 'L';
82 else if (Uplo == CblasLower) UL = 'U';
83 else
84 {
85 cblas_xerbla(2, "cblas_ztbsv","Illegal Uplo setting, %d\n", Uplo);
86 CBLAS_CallFromC = 0;
87 RowMajorStrg = 0;
88 return;
89 }
90
91 if (TransA == CblasNoTrans) TA = 'T';
92 else if (TransA == CblasTrans) TA = 'N';
93 else if (TransA == CblasConjTrans)
94 {
95 TA = 'N';
96 if ( N > 0)
97 {
98 if ( incX > 0 )
99 tincX = incX;
100 else
101 tincX = -incX;
102
103 n = N*2*(tincX);
104
105 x++;
106
107 st=x+n;
108
109 i = tincX << 1;
110 do
111 {
112 *x = -(*x);
113 x+=i;
114 }
115 while (x != st);
116 x -= n;
117 }
118 }
119 else
120 {
121 cblas_xerbla(3, "cblas_ztbsv","Illegal TransA setting, %d\n", TransA);
122 CBLAS_CallFromC = 0;
123 RowMajorStrg = 0;
124 return;
125 }
126
127 if (Diag == CblasUnit) DI = 'U';
128 else if (Diag == CblasNonUnit) DI = 'N';
129 else
130 {
131 cblas_xerbla(4, "cblas_ztbsv","Illegal Diag setting, %d\n", Diag);
132 CBLAS_CallFromC = 0;
133 RowMajorStrg = 0;
134 return;
135 }
136 #ifdef F77_CHAR
137 F77_UL = C2F_CHAR(&UL);
138 F77_TA = C2F_CHAR(&TA);
139 F77_DI = C2F_CHAR(&DI);
140 #endif
141
142 F77_ztbsv( F77_UL, F77_TA, F77_DI, &F77_N, &F77_K, A, &F77_lda, X,
143 &F77_incX);
144
145 if (TransA == CblasConjTrans)
146 {
147 if (N > 0)
148 {
149 do
150 {
151 *x = -(*x);
152 x+= i;
153 }
154 while (x != st);
155 }
156 }
157 }
158 else cblas_xerbla(1, "cblas_ztbsv", "Illegal Order setting, %d\n", order);
159 CBLAS_CallFromC = 0;
160 RowMajorStrg = 0;
161 return;
162 }
163