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// -*-C++-*-
// Vectorise using IBM's Altivec VSX (Power)
// Use the type vector double directly, without introducing a wrapper class
// Use macros instead of inline functions
// See <http://pic.dhe.ibm.com/infocenter/comphelp/v111v131/index.jsp>
#include <altivec.h>
#define vec8_architecture "VSX"
// Vector type corresponding to CCTK_REAL
typedef vector double CCTK_REAL8_VEC;
typedef vector signed long long CCTK_INTEGER8_VEC;
typedef vector bool long long CCTK_BOOLEAN8_VEC;
// Number of vector elements in a CCTK_REAL_VEC
#define CCTK_REAL8_VEC_SIZE 2
vec_static_assert(sizeof(CCTK_REAL8_VEC) ==
sizeof(CCTK_REAL8) * CCTK_REAL8_VEC_SIZE);
// Integer and boolean types corresponding to this real type
typedef long long CCTK_INTEGER8;
typedef unsigned long long CCTK_BOOLEAN8;
// Create vectors, extract vector elements
#define vec8_set1(a) (vec_splats(a))
#define vec8_set1i(a) (vec_splats(a))
#define vec8_set(a,b) \
({ \
CCTK_REAL8_VEC x; \
x[0]=(a); \
x[1]=(b); \
x; \
})
#define vec8_elt0(x) ((x)[0])
#define vec8_elt1(x) ((x)[1])
// #define vec8_elt(x,d) ((x)[d])
// #define vec8_elti(x,d) ((x)[d])
// #define vec8_eltb(x,d) ((x)[d])
static inline CCTK_REAL8 vec8_elt(CCTK_REAL8_VEC x, int d) { return x[d]; }
static inline CCTK_INTEGER8 vec8_elti(CCTK_INTEGER8_VEC x, int d) { return x[d]; }
static inline CCTK_BOOLEAN8 vec8_eltb(CCTK_BOOLEAN8_VEC x,int d) { return x[d]; }
// Load and store vectors
// Load a vector from memory (aligned and unaligned); this loads from
// a reference to a scalar
#define vec8_load(p) (*(CCTK_REAL8_VEC const*)&(p))
#define vec8_loadu(p) (*(CCTK_REAL8_VEC const*)&(p))
// Load a vector from memory that may or may not be aligned, as
// decided by the offset and the vector size
#define vec8_loadu_maybe(off,p) (vec8_loadu(p))
#define vec8_loadu_maybe3(off1,off2,off3,p) (vec8_loadu(p))
// Store a vector to memory (aligned and non-temporal); this stores to
// a reference to a scalar
#define vec8_store(p,x) (*(CCTK_REAL8_VEC*)&(p)=(x))
#define vec8_storeu(p,x) (*(CCTK_REAL8_VEC*)&(p)=(x))
// stvxl instruction doesn't exist for double precision
#define vec8_store_nta(p,x) vec8_store(p,x)
// Store a partial vector (aligned and non-temporal)
#define vec8_store_partial_prepare(i,imin,imax) \
bool const v8stp_lo = (i)>=(imin); \
bool const v8stp_hi = (i)+CCTK_REAL8_VEC_SIZE-1<(imax)
#define vec8_store_nta_partial(p_,x_) \
({ \
CCTK_REAL8& p__=(p_); \
CCTK_REAL8& p=p__; \
CCTK_REAL8_VEC const x__=(x_); \
CCTK_REAL8_VEC const x=x__; \
if (CCTK_BUILTIN_EXPECT(v8stp_lo and v8stp_hi, true)) { \
vec8_store(p,x); \
} else if (v8stp_lo) { \
(&p)[0]=vec8_elt0(x); \
} else if (v8stp_hi) { \
(&p)[1]=vec8_elt1(x); \
} \
})
// Store a lower or higher partial vector (aligned and non-temporal);
// the non-temporal hint is probably ignored
#define vec8_store_nta_partial_lo(p,x,n) ((&(p))[0]=(x)[0])
#define vec8_store_nta_partial_hi(p,x,n) ((&(p))[1]=(x)[1])
#define vec8_store_nta_partial_mid(p,x,nlo,nhi) (assert(0))
// Functions and operators
// Operators
#define k8neg(x) (-(x))
#define k8add(x,y) ((x)+(y))
#define k8sub(x,y) ((x)-(y))
#define k8mul(x,y) ((x)*(y))
#define k8div(x,y) ((x)/(y))
// Fused multiply-add, defined as [+-]x*y[+-]z
#define k8madd(x,y,z) (vec_madd(x,y,z))
#define k8msub(x,y,z) (vec_msub(x,y,z))
#define k8nmadd(x,y,z) (vec_nmadd(x,y,z))
#define k8nmsub(x,y,z) (vec_nmsub(x,y,z))
// Cheap functions
#define k8copysign(x,y) (vec_cpsgn(y,x))
#define k8fabs(x) (vec_abs(x))
#define k8fmax(x,y) (vec_max(x,y))
#define k8fmin(x,y) (vec_min(x,y))
#define k8fnabs(x) (vec_nabs(x))
#define k8sgn(x_) \
({ \
CCTK_REAL8_VEC x__=(x_); \
CCTK_REAL8_VEC x=x__; \
CCTK_BOOLEAN8_VEC iszero = k8cmpeq(x,vec8_set1((CCTK_REAL8)0.0)); \
CCTK_REAL8_VEC signedone = k8copysign(vec8_set1((CCTK_REAL8)1.0),x); \
k8ifthen(iszero, vec8_set1((CCTK_REAL8)0.0), signedone); \
})
#define k8sqrt(x) (vec_sqrt(x))
// Expensive functions
#define K8REPL(f,x_) \
({ \
CCTK_REAL8_VEC const x__=(x_); \
CCTK_REAL8_VEC const x=x__; \
vec8_set(f(vec8_elt0(x)), \
f(vec8_elt1(x))); \
})
#define K8REPL2S(f,x_,a_) \
({ \
CCTK_REAL8_VEC const x__=(x_); \
CCTK_REAL8 const a__=(a_); \
CCTK_REAL8_VEC const x=x__; \
CCTK_REAL8 const a=a__; \
vec8_set(f(vec8_elt0(x),a), \
f(vec8_elt1(x),a)); \
})
#define K8REPL2(f,x_,y_) \
({ \
CCTK_REAL8_VEC const x__=(x_); \
CCTK_REAL8_VEC const y__=(y_); \
CCTK_REAL8_VEC const x=x__; \
CCTK_REAL8_VEC const y=y__; \
vec8_set(f(vec8_elt0(x),vec8_elt0(y)), \
f(vec8_elt1(x),vec8_elt1(y))); \
})
#define k8acos(x) K8REPL(acos,x)
#define k8acosh(x) K8REPL(acosh,x)
#define k8asin(x) K8REPL(asin,x)
#define k8asinh(x) K8REPL(asinh,x)
#define k8atan(x) K8REPL(atan,x)
#define k8atan2(x,y) K8REPL2(atan2,x,y)
#define k8atanh(x) K8REPL(atanh,x)
#define k8cos(x) K8REPL(cos,x)
#define k8cosh(x) K8REPL(cosh,x)
#define k8exp(x) K8REPL(exp,x)
#define k8log(x) K8REPL(log,x)
#define k8pow(x,a) K8REPL2S(pow,x,a)
#define k8sin(x) K8REPL(sin,x)
#define k8sinh(x) K8REPL(sinh,x)
#define k8tan(x) K8REPL(tan,x)
#define k8tanh(x) K8REPL(tanh,x)
// canonical true is -1LL, canonical false is 0LL
// truth values are interpreted bit-wise
// #define k8lfalse ({ CCTK_BOOLEAN8_VEC dummy; vec_xor(dummy,dummy); })
// #define k8ltrue (k8lnot(k8lfalse))
static inline CCTK_BOOLEAN8_VEC k8lfalse1()
{
CCTK_BOOLEAN8_VEC dummy;
return vec_xor(dummy,dummy);
}
#define k8lfalse (k8lfalse1())
#define k8ltrue (k8lnot(k8lfalse))
// #define k8lnot(x_) \
// ({ \
// CCTK_BOOLEAN8_VEC x__=(x_); \
// CCTK_BOOLEAN8_VEC x=x__; \
// vec_nor(x,x); \
// })
static inline CCTK_BOOLEAN8_VEC k8lnot(CCTK_BOOLEAN8_VEC x)
{
return vec_nor(x,x);
}
#define k8land(x,y) (vec_and(x,y))
#define k8lor(x,y) (vec_or(x,y))
#define k8lxor(x,y) (vec_xor(x,y))
#define k8ifthen(x,y,z) (vec_sel(z,y,x))
#define k8cmpeq(x,y) (vec_cmpeq(x,y))
#define k8cmpne(x,y) (k8lnot(vec_cmpeq(x,y)))
#define k8cmpgt(x,y) (vec_cmpgt(x,y))
#define k8cmpge(x,y) (vec_cmpge(x,y))
#define k8cmplt(x,y) (vec_cmplt(x,y))
#define k8cmple(x,y) (vec_cmple(x,y))
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