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SWIFT
SWIFTsim
Commits
4fd51fbd
Commit
4fd51fbd
authored
8 years ago
by
James Willis
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Added vectorised kernel_deval that processes two vectors at the same time.
parent
a5a722ac
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1 merge request
!287
Particle caching
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src/kernel_hydro.h
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4fd51fbd
...
...
@@ -363,6 +363,95 @@ __attribute__((always_inline)) INLINE static void kernel_deval_vec(
dw_dx
->
v
*
kernel_constant_vec
.
v
*
kernel_gamma_inv_dim_plus_one_vec
.
v
;
}
#ifdef WENDLAND_C2_KERNEL
static
const
vector
c0
=
FILL_VEC
(
4
.
f
);
static
const
vector
c1
=
FILL_VEC
(
-
15
.
f
);
static
const
vector
c2
=
FILL_VEC
(
20
.
f
);
static
const
vector
c3
=
FILL_VEC
(
-
10
.
f
);
static
const
vector
c4
=
FILL_VEC
(
0
.
f
);
static
const
vector
c5
=
FILL_VEC
(
1
.
f
);
#endif
__attribute__
((
always_inline
))
INLINE
static
void
kernel_deval_2_vec
(
vector
*
u
,
vector
*
w
,
vector
*
dw_dx
,
vector
*
u2
,
vector
*
w2
,
vector
*
dw_dx2
)
{
/* Go to the range [0,1[ from [0,H[ */
vector
x
,
x2
;
x
.
v
=
vec_mul
(
u
->
v
,
kernel_gamma_inv_vec
.
v
);
x2
.
v
=
vec_mul
(
u2
->
v
,
kernel_gamma_inv_vec
.
v
);
#ifdef WENDLAND_C2_KERNEL
/* Init the iteration for Horner's scheme. */
w
->
v
=
vec_fma
(
c0
.
v
,
x
.
v
,
c1
.
v
);
w2
->
v
=
vec_fma
(
c0
.
v
,
x2
.
v
,
c1
.
v
);
dw_dx
->
v
=
c0
.
v
;
dw_dx2
->
v
=
c0
.
v
;
dw_dx
->
v
=
vec_fma
(
dw_dx
->
v
,
x
.
v
,
w
->
v
);
dw_dx2
->
v
=
vec_fma
(
dw_dx2
->
v
,
x2
.
v
,
w2
->
v
);
w
->
v
=
vec_fma
(
x
.
v
,
w
->
v
,
c2
.
v
);
w2
->
v
=
vec_fma
(
x2
.
v
,
w2
->
v
,
c2
.
v
);
dw_dx
->
v
=
vec_fma
(
dw_dx
->
v
,
x
.
v
,
w
->
v
);
dw_dx2
->
v
=
vec_fma
(
dw_dx2
->
v
,
x2
.
v
,
w2
->
v
);
w
->
v
=
vec_fma
(
x
.
v
,
w
->
v
,
c3
.
v
);
w2
->
v
=
vec_fma
(
x2
.
v
,
w2
->
v
,
c3
.
v
);
dw_dx
->
v
=
vec_fma
(
dw_dx
->
v
,
x
.
v
,
w
->
v
);
dw_dx2
->
v
=
vec_fma
(
dw_dx2
->
v
,
x2
.
v
,
w2
->
v
);
w
->
v
=
vec_fma
(
x
.
v
,
w
->
v
,
c4
.
v
);
w2
->
v
=
vec_fma
(
x2
.
v
,
w2
->
v
,
c4
.
v
);
dw_dx
->
v
=
vec_fma
(
dw_dx
->
v
,
x
.
v
,
w
->
v
);
dw_dx2
->
v
=
vec_fma
(
dw_dx2
->
v
,
x2
.
v
,
w2
->
v
);
w
->
v
=
vec_fma
(
x
.
v
,
w
->
v
,
c5
.
v
);
w2
->
v
=
vec_fma
(
x2
.
v
,
w2
->
v
,
c5
.
v
);
/* Return everything */
w
->
v
=
vec_mul
(
w
->
v
,
vec_mul
(
kernel_constant_vec
.
v
,
kernel_gamma_inv_dim_vec
.
v
));
w2
->
v
=
vec_mul
(
w2
->
v
,
vec_mul
(
kernel_constant_vec
.
v
,
kernel_gamma_inv_dim_vec
.
v
));
dw_dx
->
v
=
vec_mul
(
dw_dx
->
v
,
vec_mul
(
kernel_constant_vec
.
v
,
kernel_gamma_inv_dim_plus_one_vec
.
v
));
dw_dx2
->
v
=
vec_mul
(
dw_dx2
->
v
,
vec_mul
(
kernel_constant_vec
.
v
,
kernel_gamma_inv_dim_plus_one_vec
.
v
));
#else
/* Load x and get the interval id. */
vector
ind
,
ind2
;
ind
.
m
=
vec_ftoi
(
vec_fmin
(
x
.
v
*
kernel_ivals_vec
.
v
,
kernel_ivals_vec
.
v
));
ind2
.
m
=
vec_ftoi
(
vec_fmin
(
x2
.
v
*
kernel_ivals_vec
.
v
,
kernel_ivals_vec
.
v
));
/* load the coefficients. */
vector
c
[
kernel_degree
+
1
],
c2
[
kernel_degree
+
1
];
for
(
int
k
=
0
;
k
<
VEC_SIZE
;
k
++
)
for
(
int
j
=
0
;
j
<
kernel_degree
+
1
;
j
++
)
{
c
[
j
].
f
[
k
]
=
kernel_coeffs
[
ind
.
i
[
k
]
*
(
kernel_degree
+
1
)
+
j
];
c2
[
j
].
f
[
k
]
=
kernel_coeffs
[
ind2
.
i
[
k
]
*
(
kernel_degree
+
1
)
+
j
];
}
/* Init the iteration for Horner's scheme. */
w
->
v
=
(
c
[
0
].
v
*
x
.
v
)
+
c
[
1
].
v
;
w2
->
v
=
(
c2
[
0
].
v
*
x2
.
v
)
+
c2
[
1
].
v
;
dw_dx
->
v
=
c
[
0
].
v
;
dw_dx2
->
v
=
c2
[
0
].
v
;
/* And we're off! */
for
(
int
k
=
2
;
k
<=
kernel_degree
;
k
++
)
{
dw_dx
->
v
=
(
dw_dx
->
v
*
x
.
v
)
+
w
->
v
;
dw_dx2
->
v
=
(
dw_dx2
->
v
*
x2
.
v
)
+
w2
->
v
;
w
->
v
=
(
x
.
v
*
w
->
v
)
+
c
[
k
].
v
;
w2
->
v
=
(
x2
.
v
*
w2
->
v
)
+
c2
[
k
].
v
;
}
/* Return everything */
w
->
v
=
w
->
v
*
kernel_constant_vec
.
v
*
kernel_gamma_inv_dim_vec
.
v
;
w2
->
v
=
w2
->
v
*
kernel_constant_vec
.
v
*
kernel_gamma_inv_dim_vec
.
v
;
dw_dx
->
v
=
dw_dx
->
v
*
kernel_constant_vec
.
v
*
kernel_gamma_inv_dim_plus_one_vec
.
v
;
dw_dx2
->
v
=
dw_dx2
->
v
*
kernel_constant_vec
.
v
*
kernel_gamma_inv_dim_plus_one_vec
.
v
;
#endif
}
#endif
/* Some cross-check functions */
...
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