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zrotg.c
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#include<math.h>
#include"common.h"
#ifdefFUNCTION_PROFILE
#include"functable.h"
#endif
#ifndefCBLAS
voidNAME(FLOAT*DA, FLOAT*DB, FLOAT*C, FLOAT*S){
#else
voidCNAME(void*VDA, void*VDB, FLOAT*C, void*VS) {
FLOAT*DA= (FLOAT*) VDA;
FLOAT*DB= (FLOAT*) VDB;
FLOAT*S= (FLOAT*) VS;
#endif/* CBLAS */
#if defined(__i386__) || defined(__x86_64__) || defined(__ia64__) || defined(_M_X64) || defined(_M_IX86)
long doubleda_r=*(DA+0);
long doubleda_i=*(DA+1);
long doubledb_r=*(DB+0);
long doubledb_i=*(DB+1);
long doubler;
long doubleada=fabsl(da_r) +fabsl(da_i);
PRINT_DEBUG_NAME;
IDEBUG_START;
FUNCTION_PROFILE_START();
if (ada==ZERO) {
*C=ZERO;
*(S+0) =ONE;
*(S+1) =ZERO;
*(DA+0) =db_r;
*(DA+1) =db_i;
} else {
long doublealpha_r, alpha_i;
ada=sqrt(da_r*da_r+da_i*da_i);
r=sqrt(da_r*da_r+da_i*da_i+db_r*db_r+db_i*db_i);
alpha_r=da_r / ada;
alpha_i=da_i / ada;
*(C+0) =ada / r;
*(S+0) = (alpha_r*db_r+alpha_i*db_i) / r;
*(S+1) = (alpha_i*db_r-alpha_r*db_i) / r;
*(DA+0) =alpha_r*r;
*(DA+1) =alpha_i*r;
}
#else
FLOATda_r=*(DA+0);
FLOATda_i=*(DA+1);
FLOATdb_r=*(DB+0);
FLOATdb_i=*(DB+1);
FLOATr;
FLOATada=fabs(da_r) +fabs(da_i);
FLOATadb;
PRINT_DEBUG_NAME;
IDEBUG_START;
FUNCTION_PROFILE_START();
if (ada==ZERO) {
*C=ZERO;
*(S+0) =ONE;
*(S+1) =ZERO;
*(DA+0) =db_r;
*(DA+1) =db_i;
} else {
FLOATscale;
FLOATaa_r, aa_i, bb_r, bb_i;
FLOATalpha_r, alpha_i;
aa_r=fabs(da_r);
aa_i=fabs(da_i);
if (aa_i>aa_r) {
aa_r=fabs(da_i);
aa_i=fabs(da_r);
}
if (aa_r==ZERO) {
ada=0.;
} else {
scale= (aa_i / aa_r);
ada=aa_r*sqrt(ONE+scale*scale);
}
bb_r=fabs(db_r);
bb_i=fabs(db_i);
if (bb_i>bb_r) {
bb_r=fabs(bb_i);
bb_i=fabs(bb_r);
}
if (bb_r==ZERO) {
adb=0.;
} else {
scale= (bb_i / bb_r);
adb=bb_r*sqrt(ONE+scale*scale);
}
scale=ada+adb;
aa_r=da_r / scale;
aa_i=da_i / scale;
bb_r=db_r / scale;
bb_i=db_i / scale;
r=scale*sqrt(aa_r*aa_r+aa_i*aa_i+bb_r*bb_r+bb_i*bb_i);
alpha_r=da_r / ada;
alpha_i=da_i / ada;
*(C+0) =ada / r;
*(S+0) = (alpha_r*db_r+alpha_i*db_i) / r;
*(S+1) = (alpha_i*db_r-alpha_r*db_i) / r;
*(DA+0) =alpha_r*r;
*(DA+1) =alpha_i*r;
}
#endif
FUNCTION_PROFILE_END(4, 4, 4);
IDEBUG_END;
return;
}
