GCC Code Coverage Report

Directory: ./
File: src/sys/classes/bv/interface/bvblas.c
Date: 2025-11-19 04:19:03
Exec Total Coverage
Lines: 149 155 96.1%
Functions: 8 8 100.0%
Branches: 569 1010 56.3%
Line Branch Exec Source
1 /*
2 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
3 SLEPc - Scalable Library for Eigenvalue Problem Computations
4 Copyright (c) 2002-, Universitat Politecnica de Valencia, Spain
5
6 This file is part of SLEPc.
7 SLEPc is distributed under a 2-clause BSD license (see LICENSE).
8 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
9 */
10 /*
11 BV private kernels that use the BLAS
12 */
13
14 #include <slepc/private/bvimpl.h>
15 #include <slepcblaslapack.h>
16
17 #define BLOCKSIZE 64
18
19 /*
20 C := alpha*A*B + beta*C
21
22 A is mxk (ld=lda), B is kxn (ld=ldb), C is mxn (ld=ldc)
23 */
24 54518 PetscErrorCode BVMult_BLAS_Private(BV bv,PetscInt m_,PetscInt n_,PetscInt k_,PetscScalar alpha,const PetscScalar *A,PetscInt lda_,const PetscScalar *B,PetscInt ldb_,PetscScalar beta,PetscScalar *C,PetscInt ldc_)
25 {
26 54518 PetscBLASInt m,n,k,lda,ldb,ldc;
27 #if defined(PETSC_HAVE_FBLASLAPACK) || defined(PETSC_HAVE_F2CBLASLAPACK)
28 PetscBLASInt l,bs=BLOCKSIZE;
29 #endif
30
31
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 54518 PetscFunctionBegin;
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 54518 PetscCall(PetscBLASIntCast(m_,&m));
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 54518 PetscCall(PetscBLASIntCast(n_,&n));
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 54518 PetscCall(PetscBLASIntCast(k_,&k));
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 54518 PetscCall(PetscBLASIntCast(lda_,&lda));
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 54518 PetscCall(PetscBLASIntCast(ldb_,&ldb));
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 54518 PetscCall(PetscBLASIntCast(ldc_,&ldc));
38 #if defined(PETSC_HAVE_FBLASLAPACK) || defined(PETSC_HAVE_F2CBLASLAPACK)
39 l = m % bs;
40 if (l) PetscCallBLAS("BLASgemm",BLASgemm_("N","N",&l,&n,&k,&alpha,(PetscScalar*)A,&lda,(PetscScalar*)B,&ldb,&beta,C,&ldc));
41 for (;l<m;l+=bs) {
42 PetscCallBLAS("BLASgemm",BLASgemm_("N","N",&bs,&n,&k,&alpha,(PetscScalar*)A+l,&lda,(PetscScalar*)B,&ldb,&beta,C+l,&ldc));
43 }
44 #else
45
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 54518 if (m) PetscCallBLAS("BLASgemm",BLASgemm_("N","N",&m,&n,&k,&alpha,(PetscScalar*)A,&lda,(PetscScalar*)B,&ldb,&beta,C,&ldc));
46 #endif
47
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 54518 PetscCall(PetscLogFlops(2.0*m*n*k));
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 54518 PetscFunctionReturn(PETSC_SUCCESS);
49 }
50
51 /*
52 y := alpha*A*x + beta*y
53
54 A is nxk (ld=lda)
55 */
56 6582893 PetscErrorCode BVMultVec_BLAS_Private(BV bv,PetscInt n_,PetscInt k_,PetscScalar alpha,const PetscScalar *A,PetscInt lda_,const PetscScalar *x,PetscScalar beta,PetscScalar *y)
57 {
58 6582893 PetscBLASInt n,k,lda,one=1;
59
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 6582893 PetscFunctionBegin;
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 6582893 PetscCall(PetscBLASIntCast(n_,&n));
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 6582893 PetscCall(PetscBLASIntCast(k_,&k));
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 6582893 PetscCall(PetscBLASIntCast(lda_,&lda));
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 6582893 if (n) PetscCallBLAS("BLASgemv",BLASgemv_("N",&n,&k,&alpha,A,&lda,x,&one,&beta,y,&one));
65
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 6582893 PetscCall(PetscLogFlops(2.0*n*k));
66
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 6582893 PetscFunctionReturn(PETSC_SUCCESS);
67 }
68
69 /*
70 A(:,s:e-1) := A*B(:,s:e-1)
71
72 A is mxk (ld=lda), B is kxn (ld=ldb), n=e-s
73 */
74 277918 PetscErrorCode BVMultInPlace_BLAS_Private(BV bv,PetscInt m_,PetscInt k_,PetscInt s,PetscInt e,PetscScalar *A,PetscInt lda_,const PetscScalar *B,PetscInt ldb_,PetscBool btrans)
75 {
76 277918 PetscScalar *pb,zero=0.0,one=1.0;
77 277918 PetscBLASInt m,n,k,l,lda,ldb,bs=BLOCKSIZE;
78 277918 PetscInt j,n_=e-s;
79 277918 const char *bt;
80
81
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 277918 PetscFunctionBegin;
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 277918 PetscCall(PetscBLASIntCast(m_,&m));
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 277918 PetscCall(PetscBLASIntCast(n_,&n));
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 277918 PetscCall(PetscBLASIntCast(k_,&k));
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 277918 PetscCall(PetscBLASIntCast(lda_,&lda));
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 277918 PetscCall(PetscBLASIntCast(ldb_,&ldb));
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 277918 PetscCall(BVAllocateWork_Private(bv,BLOCKSIZE*n_));
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 277918 if (PetscUnlikely(btrans)) {
89 30 pb = (PetscScalar*)B+s;
90 30 bt = "C";
91 } else {
92 277888 pb = (PetscScalar*)B+s*ldb;
93 277888 bt = "N";
94 }
95 277918 l = m % bs;
96
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 277918 if (l) {
97
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 266229 PetscCallBLAS("BLASgemm",BLASgemm_("N",bt,&l,&n,&k,&one,A,&lda,pb,&ldb,&zero,bv->work,&l));
98
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 1961693 for (j=0;j<n;j++) PetscCall(PetscArraycpy(A+(s+j)*lda,bv->work+j*l,l));
99 }
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 1527082 for (;l<m;l+=bs) {
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 1249164 PetscCallBLAS("BLASgemm",BLASgemm_("N",bt,&bs,&n,&k,&one,A+l,&lda,pb,&ldb,&zero,bv->work,&bs));
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 11679262 for (j=0;j<n;j++) PetscCall(PetscArraycpy(A+(s+j)*lda+l,bv->work+j*bs,bs));
103 }
104
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 277918 PetscCall(PetscLogFlops(2.0*m*n*k));
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 277918 PetscFunctionReturn(PETSC_SUCCESS);
106 }
107
108 /*
109 V := V*B
110
111 V is mxn (ld=m), B is nxn (ld=k)
112 */
113 1170 PetscErrorCode BVMultInPlace_Vecs_Private(BV bv,PetscInt m_,PetscInt n_,PetscInt k_,Vec *V,const PetscScalar *B,PetscBool btrans)
114 {
115 1170 PetscScalar zero=0.0,one=1.0,*out,*pout;
116 1170 const PetscScalar *pin;
117 1170 PetscBLASInt m = 0,n,k,l,bs=BLOCKSIZE;
118 1170 PetscInt j;
119 1170 const char *bt;
120
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 1170 PetscFunctionBegin;
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 1170 PetscCall(PetscBLASIntCast(m_,&m));
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 1170 PetscCall(PetscBLASIntCast(n_,&n));
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 1170 PetscCall(PetscBLASIntCast(k_,&k));
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 1170 PetscCall(BVAllocateWork_Private(bv,2*BLOCKSIZE*n_));
126 1170 out = bv->work+BLOCKSIZE*n_;
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 1170 if (btrans) bt = "C";
128 1160 else bt = "N";
129 1170 l = m % bs;
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 1170 if (l) {
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 4522 PetscCall(VecGetArrayRead(V[j],&pin));
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 4522 PetscCall(PetscArraycpy(bv->work+j*l,pin,l));
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 4522 PetscCall(VecRestoreArrayRead(V[j],&pin));
135 }
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 1170 PetscCallBLAS("BLASgemm",BLASgemm_("N",bt,&l,&n,&n,&one,bv->work,&l,(PetscScalar*)B,&k,&zero,out,&l));
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 4522 PetscCall(VecGetArray(V[j],&pout));
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 4522 PetscCall(PetscArraycpy(pout,out+j*l,l));
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 4522 PetscCall(VecRestoreArray(V[j],&pout));
141 }
142 }
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 5262 for (;l<m;l+=bs) {
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 15516 PetscCall(VecGetArrayRead(V[j],&pin));
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 15516 PetscCall(PetscArraycpy(bv->work+j*bs,pin+l,bs));
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 15516 PetscCall(VecRestoreArrayRead(V[j],&pin));
148 }
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 4092 PetscCallBLAS("BLASgemm",BLASgemm_("N",bt,&bs,&n,&n,&one,bv->work,&bs,(PetscScalar*)B,&k,&zero,out,&bs));
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 19608 for (j=0;j<n;j++) {
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 15516 PetscCall(VecGetArray(V[j],&pout));
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 15516 PetscCall(PetscArraycpy(pout+l,out+j*bs,bs));
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 15516 PetscCall(VecRestoreArray(V[j],&pout));
154 }
155 }
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 1170 PetscCall(PetscLogFlops(2.0*n*n*k));
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 1170 PetscFunctionReturn(PETSC_SUCCESS);
158 }
159
160 /*
161 B := alpha*A + beta*B
162
163 A,B are nxk
164 */
165 12294 PetscErrorCode BVAXPY_BLAS_Private(BV bv,PetscInt n_,PetscInt k_,PetscScalar alpha,const PetscScalar *A,PetscInt lda_,PetscScalar beta,PetscScalar *B,PetscInt ldb_)
166 {
167 12294 PetscBLASInt m,one=1;
168 12294 PetscInt i,j;
169
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 12294 PetscFunctionBegin;
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 12294 if (lda_==n_ && ldb_==n_) {
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 12214 PetscCall(PetscBLASIntCast(n_*k_,&m));
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 12214 if (beta!=(PetscScalar)1.0) PetscCallBLAS("BLASscal",BLASscal_(&m,&beta,B,&one));
174
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 12214 PetscCallBLAS("BLASaxpy",BLASaxpy_(&m,&alpha,A,&one,B,&one));
175 } else {
176
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 80 if (beta!=(PetscScalar)1.0) {
177 ✗ for (j=0;j<k_;j++) {
178 ✗ for (i=0;i<n_;i++) {
179 ✗ B[i+j*ldb_] = alpha*A[i+j*lda_] + beta*B[i+j*ldb_];
180 }
181 }
182 } else {
183
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184
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 11640 for (i=0;i<n_;i++) {
185 10980 B[i+j*ldb_] += alpha*A[i+j*lda_];
186 }
187 }
188 }
189 }
190
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 12294 PetscCall(PetscLogFlops((beta==(PetscScalar)1.0)?2.0*n_*k_:3.0*n_*k_));
191
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 12294 PetscFunctionReturn(PETSC_SUCCESS);
192 }
193
194 /*
195 C := A'*B
196
197 A' is mxk (ld=lda), B is kxn (ld=ldb), C is mxn (ld=ldc)
198 */
199 281264 PetscErrorCode BVDot_BLAS_Private(BV bv,PetscInt m_,PetscInt n_,PetscInt k_,const PetscScalar *A,PetscInt lda_,const PetscScalar *B,PetscInt ldb_,PetscScalar *C,PetscInt ldc_,PetscBool mpi)
200 {
201 281264 PetscScalar zero=0.0,one=1.0,*CC;
202 281264 PetscBLASInt m,n,k,lda,ldb,ldc,j;
203 281264 PetscMPIInt len;
204
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 281264 PetscFunctionBegin;
206
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 281264 PetscCall(PetscBLASIntCast(m_,&m));
207
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 281264 PetscCall(PetscBLASIntCast(n_,&n));
208
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 281264 PetscCall(PetscBLASIntCast(k_,&k));
209
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 281264 PetscCall(PetscBLASIntCast(lda_,&lda));
210
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 281264 PetscCall(PetscBLASIntCast(ldb_,&ldb));
211
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 281264 PetscCall(PetscBLASIntCast(ldc_,&ldc));
212
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 281264 if (mpi) {
213
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 37878 if (ldc==m) {
214
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 24396 PetscCall(BVAllocateWork_Private(bv,m*n));
215
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 24396 if (k) PetscCallBLAS("BLASgemm",BLASgemm_("C","N",&m,&n,&k,&one,(PetscScalar*)A,&lda,(PetscScalar*)B,&ldb,&zero,bv->work,&ldc));
216 ✗ else PetscCall(PetscArrayzero(bv->work,m*n));
217
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 24396 PetscCall(PetscMPIIntCast(m*n,&len));
218
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 24396 PetscCallMPI(MPIU_Allreduce(bv->work,C,len,MPIU_SCALAR,MPIU_SUM,PetscObjectComm((PetscObject)bv)));
219 } else {
220
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 13482 PetscCall(BVAllocateWork_Private(bv,2*m*n));
221 13482 CC = bv->work+m*n;
222
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 13482 if (k) PetscCallBLAS("BLASgemm",BLASgemm_("C","N",&m,&n,&k,&one,(PetscScalar*)A,&lda,(PetscScalar*)B,&ldb,&zero,bv->work,&m));
223 ✗ else PetscCall(PetscArrayzero(bv->work,m*n));
224
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 13482 PetscCall(PetscMPIIntCast(m*n,&len));
225
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 13482 PetscCallMPI(MPIU_Allreduce(bv->work,CC,len,MPIU_SCALAR,MPIU_SUM,PetscObjectComm((PetscObject)bv)));
226
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 158734 for (j=0;j<n;j++) PetscCall(PetscArraycpy(C+j*ldc,CC+j*m,m));
227 }
228 } else {
229
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 243386 if (k) PetscCallBLAS("BLASgemm",BLASgemm_("C","N",&m,&n,&k,&one,(PetscScalar*)A,&lda,(PetscScalar*)B,&ldb,&zero,C,&ldc));
230 }
231
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 281264 PetscCall(PetscLogFlops(2.0*m*n*k));
232
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 281264 PetscFunctionReturn(PETSC_SUCCESS);
233 }
234
235 /*
236 y := A'*x
237
238 A is nxk (ld=lda)
239 */
240 4403353 PetscErrorCode BVDotVec_BLAS_Private(BV bv,PetscInt n_,PetscInt k_,const PetscScalar *A,PetscInt lda_,const PetscScalar *x,PetscScalar *y,PetscBool mpi)
241 {
242 4403353 PetscScalar zero=0.0,done=1.0;
243 4403353 PetscBLASInt n,k,lda,one=1;
244 4403353 PetscMPIInt len;
245
246
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 4403353 PetscFunctionBegin;
247
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 4403353 PetscCall(PetscBLASIntCast(n_,&n));
248
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 4403353 PetscCall(PetscBLASIntCast(k_,&k));
249
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 4403353 PetscCall(PetscBLASIntCast(lda_,&lda));
250
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 4403353 if (mpi) {
251
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 315072 PetscCall(BVAllocateWork_Private(bv,k));
252
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 315072 if (n) PetscCallBLAS("BLASgemv",BLASgemv_("C",&n,&k,&done,A,&lda,x,&one,&zero,bv->work,&one));
253 ✗ else PetscCall(PetscArrayzero(bv->work,k));
254
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 315072 PetscCall(PetscMPIIntCast(k,&len));
255
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 315072 PetscCallMPI(MPIU_Allreduce(bv->work,y,len,MPIU_SCALAR,MPIU_SUM,PetscObjectComm((PetscObject)bv)));
256 } else {
257
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 4088281 if (n) PetscCallBLAS("BLASgemv",BLASgemv_("C",&n,&k,&done,A,&lda,x,&one,&zero,y,&one));
258 }
259
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 4403353 PetscCall(PetscLogFlops(2.0*n*k));
260
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 4403353 PetscFunctionReturn(PETSC_SUCCESS);
261 }
262
263 /*
264 Scale n scalars
265 */
266 2185742 PetscErrorCode BVScale_BLAS_Private(BV bv,PetscInt n_,PetscScalar *A,PetscScalar alpha)
267 {
268 2185742 PetscBLASInt n,one=1;
269
270
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 2185742 PetscFunctionBegin;
271
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 2185742 if (PetscUnlikely(alpha == (PetscScalar)0.0)) PetscCall(PetscArrayzero(A,n_));
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 2183108 else if (alpha!=(PetscScalar)1.0) {
273
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 2183088 PetscCall(PetscBLASIntCast(n_,&n));
274
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 2183088 PetscCallBLAS("BLASscal",BLASscal_(&n,&alpha,A,&one));
275
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 2183088 PetscCall(PetscLogFlops(1.0*n));
276 }
277
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 429212 PetscFunctionReturn(PETSC_SUCCESS);
278 }
279