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Added sharp_make_mmajor_real_packed_alm_info

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This commit is contained in:
Dag Sverre Seljebotn 2015-03-29 22:41:37 +02:00
parent e36488996f
commit c50c0fe27a
4 changed files with 53 additions and 15 deletions
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2
libsharp/sharp.c
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@ -859,6 +859,8 @@ static void sharp_build_job_common (sharp_job *job, sharp_jobtype type,
job->flags = flags;
if ((job->flags&SHARP_NVMAX)==0)
job->flags|=sharp_nv_oracle (type, spin, ntrans);
if (alm_info->flags&SHARP_REAL_HARMONICS)
job->flags|=SHARP_REAL_HARMONICS;
job->time = 0.;
job->opcnt = 0;
job->ntrans = ntrans;

24
libsharp/sharp_almhelpers.c
View file

@ -68,3 +68,27 @@ void sharp_make_rectangular_alm_info (int lmax, int mmax, int stride,
}
*alm_info = info;
}
void sharp_make_mmajor_real_packed_alm_info (int lmax, int stride,
int nm, const int *ms, sharp_alm_info **alm_info)
{
ptrdiff_t idx;
int f;
sharp_alm_info *info = RALLOC(sharp_alm_info,1);
info->lmax = lmax;
info->nm = nm;
info->mval = RALLOC(int,nm);
info->mvstart = RALLOC(ptrdiff_t,nm);
info->stride = stride;
info->flags = SHARP_PACKED | SHARP_REAL_HARMONICS;
idx = 0; /* tracks the number of 'consumed' elements so far; need to correct by m */
for (int im=0; im!=nm; ++im)
{
int m=(ms==NULL)?im:ms[im];
f = (m==0) ? 1 : 2;
info->mval[im] = m;
info->mvstart[im] = stride * (idx - f * m);
idx += f * (lmax + 1 - m);
}
*alm_info = info;
}

8
libsharp/sharp_almhelpers.h
View file

@ -50,6 +50,14 @@ void sharp_make_triangular_alm_info (int lmax, int mmax, int stride,
void sharp_make_rectangular_alm_info (int lmax, int mmax, int stride,
sharp_alm_info **alm_info);
/*! Initialises alm_info for mmajor, real, packed spherical harmonics.
Pass \a mmax + 1 to nm and NULL to \a ms in order to use everything;
otherwise you can pick a subset of m to process (should only be used
for MPI parallelization).
\ingroup almgroup */
void sharp_make_mmajor_real_packed_alm_info (int lmax, int stride,
int nm, const int *ms, sharp_alm_info **alm_info);
#ifdef __cplusplus
}
#endif

34
libsharp/sharp_lowlevel.h
View file

@ -86,10 +86,21 @@ typedef struct
} sharp_alm_info;
/*! alm_info flags */
typedef enum { SHARP_PACKED = 1
/*< m=0-coefficients are packed so that the (zero) imaginary part is
not present. mvstart is in units of *real* float/double for all
m; stride is in units of reals for m=0 and complex for m!=0 */
typedef enum { SHARP_PACKED = 1,
/*!< m=0-coefficients are packed so that the (zero) imaginary part is
not present. mvstart is in units of *real* float/double for all
m; stride is in units of reals for m=0 and complex for m!=0 */
SHARP_REAL_HARMONICS = 1<<6
/*!< Use the real spherical harmonic convention. For
m==0, the alm are treated exactly the same as in
the complex case. For m!=0, alm[i] represent a
pair (+abs(m), -abs(m)) instead of (real, imag),
and the coefficients are scaled by a factor of
sqrt(2) relative to the complex case. In other
words, (sqrt(.5) * alm[i]) recovers the
corresponding complex coefficient (when accessed
as complex).
*/
} sharp_almflags;
@ -172,17 +183,10 @@ typedef enum { SHARP_DP = 1<<4,
SHARP_ADD = 1<<5,
/*!< results are added to the output arrays, instead of
overwriting them */
SHARP_REAL_HARMONICS = 1<<6,
/*!< Use the real spherical harmonic convention. For
m==0, the alm are treated exactly the same as in
the complex case. For m!=0, alm[i] represent a
pair (+abs(m), -abs(m)) instead of (real, imag),
and the coefficients are scaled by a factor of
sqrt(2) relative to the complex case. In other
words, (sqrt(.5) * alm[i]) recovers the
corresponding complex coefficient (when accessed
as complex).
*/
/* NOTE: SHARP_REAL_HARMONICS, 1<<6, is also available in sharp_jobflags,
but its use here is deprecated in favor of having it in the sharp_alm_info */
SHARP_NO_FFT = 1<<7,
SHARP_USE_WEIGHTS = 1<<20, /* internal use only */