1 /*
2 * cblas_ctrsv.c
3 * The program is a C interface to ctrsv.
4 *
5 * Keita Teranishi 3/23/98
6 *
7 */
8 #include "cblas.h"
9 #include "cblas_f77.h"
cblas_ctrsv(const enum CBLAS_ORDER order,const enum CBLAS_UPLO Uplo,const enum CBLAS_TRANSPOSE TransA,const enum CBLAS_DIAG Diag,const int N,const void * A,const int lda,void * X,const int incX)10 void cblas_ctrsv(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 void *A, const int lda, void *X,
13 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_incX=incX;
27 #else
28 #define F77_N N
29 #define F77_lda lda
30 #define F77_incX incX
31 #endif
32 int n, i=0, tincX;
33 float *st=0,*x=(float *)X;
34 extern int CBLAS_CallFromC;
35 extern int RowMajorStrg;
36 RowMajorStrg = 0;
37
38 CBLAS_CallFromC = 1;
39 if (order == CblasColMajor)
40 {
41 if (Uplo == CblasUpper) UL = 'U';
42 else if (Uplo == CblasLower) UL = 'L';
43 else
44 {
45 cblas_xerbla(2, "cblas_ctrsv","Illegal Uplo setting, %d\n", Uplo);
46 CBLAS_CallFromC = 0;
47 RowMajorStrg = 0;
48 return;
49 }
50 if (TransA == CblasNoTrans) TA = 'N';
51 else if (TransA == CblasTrans) TA = 'T';
52 else if (TransA == CblasConjTrans) TA = 'C';
53 else
54 {
55 cblas_xerbla(3, "cblas_ctrsv","Illegal TransA setting, %d\n", TransA);
56 CBLAS_CallFromC = 0;
57 RowMajorStrg = 0;
58 return;
59 }
60 if (Diag == CblasUnit) DI = 'U';
61 else if (Diag == CblasNonUnit) DI = 'N';
62 else
63 {
64 cblas_xerbla(4, "cblas_ctrsv","Illegal Diag setting, %d\n", Diag);
65 CBLAS_CallFromC = 0;
66 RowMajorStrg = 0;
67 return;
68 }
69 #ifdef F77_CHAR
70 F77_UL = C2F_CHAR(&UL);
71 F77_TA = C2F_CHAR(&TA);
72 F77_DI = C2F_CHAR(&DI);
73 #endif
74 F77_ctrsv( F77_UL, F77_TA, F77_DI, &F77_N, A, &F77_lda, X,
75 &F77_incX);
76 }
77 else if (order == CblasRowMajor)
78 {
79 RowMajorStrg = 1;
80 if (Uplo == CblasUpper) UL = 'L';
81 else if (Uplo == CblasLower) UL = 'U';
82 else
83 {
84 cblas_xerbla(2, "cblas_ctrsv","Illegal Uplo setting, %d\n", Uplo);
85 CBLAS_CallFromC = 0;
86 RowMajorStrg = 0;
87 return;
88 }
89
90 if (TransA == CblasNoTrans) TA = 'T';
91 else if (TransA == CblasTrans) TA = 'N';
92 else if (TransA == CblasConjTrans)
93 {
94 TA = 'N';
95 if ( N > 0)
96 {
97 if ( incX > 0 )
98 tincX = incX;
99 else
100 tincX = -incX;
101
102 n = N*2*(tincX);
103 x++;
104 st=x+n;
105 i = tincX << 1;
106 do
107 {
108 *x = -(*x);
109 x+=i;
110 }
111 while (x != st);
112 x -= n;
113 }
114 }
115 else
116 {
117 cblas_xerbla(3, "cblas_ctrsv","Illegal TransA setting, %d\n", TransA);
118 CBLAS_CallFromC = 0;
119 RowMajorStrg = 0;
120 return;
121 }
122
123 if (Diag == CblasUnit) DI = 'U';
124 else if (Diag == CblasNonUnit) DI = 'N';
125 else
126 {
127 cblas_xerbla(4, "cblas_ctrsv","Illegal Diag setting, %d\n", Diag);
128 CBLAS_CallFromC = 0;
129 RowMajorStrg = 0;
130 return;
131 }
132 #ifdef F77_CHAR
133 F77_UL = C2F_CHAR(&UL);
134 F77_TA = C2F_CHAR(&TA);
135 F77_DI = C2F_CHAR(&DI);
136 #endif
137 F77_ctrsv( F77_UL, F77_TA, F77_DI, &F77_N, A, &F77_lda, X,
138 &F77_incX);
139 if (TransA == CblasConjTrans)
140 {
141 if (N > 0)
142 {
143 do
144 {
145 *x = -(*x);
146 x += i;
147 }
148 while (x != st);
149 }
150 }
151 }
152 else cblas_xerbla(1, "cblas_ctrsv", "Illegal Order setting, %d\n", order);
153 CBLAS_CallFromC = 0;
154 RowMajorStrg = 0;
155 return;
156 }
157