// Vectorise using Intel's or AMD's SSE // Use the type __m128 directly, without introducing a wrapper class // Use macros instead of inline functions #include #include #include #ifdef __SSE4_1__ # define vec4_architecture_SSE4_1 "+SSE4.1" #else # define vec4_architecture_SSE4_1 "" #endif #ifdef __SSE4A__ # define vec4_architecture_SSE4a "+SSE4A" #else # define vec4_architecture_SSE4a "" #endif #ifdef __FMA4__ # define vec4_architecture_FMA4 "+FMA4" #else # define vec4_architecture_FMA4 "" #endif #define vec4_architecture "SSE" vec4_architecture_SSE4_1 vec4_architecture_SSE4a vec4_architecture_FMA4 " (32-bit precision)" // Vector type corresponding to CCTK_REAL #define CCTK_REAL4_VEC __m128 // Number of vector elements in a CCTK_REAL_VEC #define CCTK_REAL4_VEC_SIZE 4 // Create vectors, extract vector elements #define vec4_set1(a) (_mm_set1_ps(a)) #define vec4_set(a,b,c,d) (_mm_set_ps(d,c,b,a)) // note reversed arguments // original order is 0123 #define vec4_swap1032(x_) \ ({ \ CCTK_REAL4_VEC const xx=(x_); \ CCTK_REAL4_VEC const x=xx; \ _mm_shuffle_ps(x,x, _MM_SHUFFLE(2,3,0,1)); \ }) #define vec4_swap2301(x_) \ ({ \ CCTK_REAL4_VEC const xx=(x_); \ CCTK_REAL4_VEC const x=xx; \ _mm_shuffle_ps(x,x, _MM_SHUFFLE(1,0,3,2)); \ }) #define vec4_swap3210(x_) \ ({ \ CCTK_REAL4_VEC const xx=(x_); \ CCTK_REAL4_VEC const x=xx; \ _mm_shuffle_ps(x,x, _MM_SHUFFLE(0,1,2,3)); \ }) #if defined(__PGI) // _mm_cvtss_f32 does not exist on PGI compilers # define vec4_elt0(x) \ ({ \ CCTK_REAL4 a; \ asm ("" : "=x" (a) : "0" (x)); \ a; \ }) #else # define vec4_elt0(x) (_mm_cvtss_f32(x)) // this is a no-op #endif #define vec4_elt1(x) vec4_elt0(vec4_swap1032(x)) #define vec4_elt2(x) vec4_elt0(vec4_swap2301(x)) #define vec4_elt3(x) vec4_elt0(vec4_swap3210(x)) #if defined(__PGI) # define vec4_elt(x_,d) \ ({ \ CCTK_REAL4_VEC const xx=(x_); \ CCTK_REAL4_VEC const x=xx; \ CCTK_REAL4 a; \ if (d==0) a=vec4_elt0(x); \ else if (d==1) a=vec4_elt1(x); \ else if (d==2) a=vec4_elt2(x); \ else if (d==3) a=vec4_elt3(x); \ a; \ }) #else # define vec4_elt(x_,d) \ ({ \ CCTK_REAL4_VEC const xx=(x_); \ CCTK_REAL4_VEC const x=xx; \ CCTK_REAL4 a; \ switch (d) { \ case 0: a=vec4_elt0(x); break; \ case 1: a=vec4_elt1(x); break; \ case 2: a=vec4_elt2(x); break; \ case 3: a=vec4_elt3(x); break; \ } \ a; \ }) #endif // Load and store vectors // Load a vector from memory (aligned and unaligned); this loads from // a reference to a scalar #define vec4_load(p) (_mm_load_ps(&(p))) #define vec4_loadu(p) (_mm_loadu_ps(&(p))) #if ! VECTORISE_ALWAYS_USE_ALIGNED_LOADS # define vec4_load_off1(p) vec_loadu(p) # define vec4_load_off2(p) vec_loadu(p) # define vec4_load_off3(p) vec_loadu(p) #else # define vec4_load_off1(p_) \ ({ \ CCTK_REAL4 const& pp=(p_); \ CCTK_REAL4 const& p=pp; \ CCTK_REAL4_VEC const lo=vec4_load((&p)[-1]); \ CCTK_REAL4_VEC const hi=vec4_load((&p)[+3]); \ assert(0); \ CCTK_REAL4_VEC const hi2=_mm_suffle_ps(lo,hi, _MM_SHUFFLE(0,1,2,3)); \ _mm_shuffle_ps(lo,hi2, _MM_SHUFFLE(2,1,3,0)); \ }) # define vec4_load_off2(p_) \ ({ \ CCTK_REAL4 const& pp=(p_); \ CCTK_REAL4 const& p=pp; \ CCTK_REAL4_VEC const lo=vec4_load((&p)[-2]); \ CCTK_REAL4_VEC const hi=vec4_load((&p)[+2]); \ _mm_shuffle_ps(lo,hi, _MM_SHUFFLE(1,0,3,2)); \ }) # define vec4_load_off1(p_) \ ({ \ CCTK_REAL4 const& pp=(p_); \ CCTK_REAL4 const& p=pp; \ CCTK_REAL4_VEC const lo=vec4_load((&p)[-1]); \ CCTK_REAL4_VEC const hi=vec4_load((&p)[+3]); \ assert(0); \ CCTK_REAL4_VEC const lo2=_mm_suffle_ps(lo,hi, _MM_SHUFFLE(0,1,2,3)); \ _mm_shuffle_ps(lo2,hi, _MM_SHUFFLE(3,0,2,1)); \ }) #endif // Load a vector from memory that may or may not be aligned, as // decided by the offset off and the vector size #if VECTORISE_ALWAYS_USE_UNALIGNED_LOADS // Implementation: Always use unaligned load # define vec4_loadu_maybe(off,p) vec4_loadu(p) # define vec4_loadu_maybe3(off1,off2,off3,p) vec4_loadu(p) #else # define vec4_loadu_maybe(off,p_) \ ({ \ CCTK_REAL4 const& pp=(p_); \ CCTK_REAL4 const& p=pp; \ (off) % CCTK_REAL4_VEC_SIZE == 0 ? \ vec4_load(p) : \ vec4_loadu(p); \ }) # if VECTORISE_ALIGNED_ARRAYS // Assume all array x sizes are multiples of the vector size # define vec4_loadu_maybe3(off1,off2,off3,p) \ vec4_loadu_maybe(off1,p) # else # define vec4_loadu_maybe3(off1,off2,off3,p) \ vec4_loadu_maybe((off1)|(off2)|(off3),p) # endif #endif // Store a lower or higher partial vector (aligned and non-temporal); // the non-temporal hint is probably ignored #if ! VECTORISE_STREAMING_STORES || ! defined(__SSE4A__) # define vec4_store_nta_partial_lo(p_,x_,n) \ ({ \ CCTK_REAL4 const& pp=(p_); \ CCTK_REAL4 const& p=pp; \ CCTK_REAL4_VEC const xx=(x_); \ CCTK_REAL4_VEC const x=xx; \ switch (n) { \ case 1: (&p)[0]=vec4_elt0(x); break; \ case 2: _mm_storel_ps(&p,x); break; \ case 3: _mm_storel_ps(&p,x); (&p)[2]=vec4_elt2(x); break; \ } \ }) # define vec4_store_nta_partial_hi(p_,x_,n) \ ({ \ CCTK_REAL4 const& pp=(p_); \ CCTK_REAL4 const& p=pp; \ CCTK_REAL4_VEC const xx=(x_); \ CCTK_REAL4_VEC const x=xx; \ switch (n) { \ case 1: (&p)[3]=vec4_elt3(x); break; \ case 2: _mm_storeh_ps(&p+2,x); break; \ case 3: _mm_storeh_ps(&p+2,x); (&p)[1]=vec4_elt1(x); break; \ } \ }) #else # define vec4_store_nta_partial_lo(p_,x_,n) \ ({ \ CCTK_REAL4 const& pp=(p_); \ CCTK_REAL4 const& p=pp; \ CCTK_REAL4_VEC const xx=(x_); \ CCTK_REAL4_VEC const x=xx; \ switch (n) { \ case 1: \ _mm_stream_ss(&p,x); \ break; \ case 2: \ _mm_storel_ps(&p,x); \ break; \ case 3: \ _mm_storel_ps(&p,x); \ _mm_stream_ss(&p+2, vec4_swap2301(x)); \ break; \ } \ }) # define vec4_store_nta_partial_hi(p_,x_,n) \ ({ \ CCTK_REAL4 const& pp=(p_); \ CCTK_REAL4 const& p=pp; \ CCTK_REAL4_VEC const xx=(x_); \ CCTK_REAL4_VEC const x=xx; \ switch (n) { \ case 1: \ _mm_stream_ss(&p+3, vec4_swap3210(x)); \ break; \ case 2: \ _mm_storeh_ps(&p+2,x); \ break; \ case 3: \ _mm_storeh_ps(&p+2,x); \ _mm_stream_ss(&p+1, vec4_swap1032(x)); \ break; \ } \ }) #endif // Functions and operators static const union { unsigned i[4]; __m128 v; } k4sign_mask_union = {{ 0x80000000U, 0x80000000U, 0x80000000U, 0x80000000U }}; #define k4sign_mask (k4sign_mask_union.v) // Operators #define k4pos(x) (x) #define k4neg(x) (_mm_xor_ps(k4sign_mask,x)) // #define k4inv(x) // TODO: provide k4inv via rcp and Newton-Raphson // This is described in AMD's publication 47414. // This should apply for AVX as well. #define k4add(x,y) (_mm_add_ps(x,y)) #define k4sub(x,y) (_mm_sub_ps(x,y)) #define k4mul(x,y) (_mm_mul_ps(x,y)) // TODO: use k4inv and k4mul instead #define k4div(x,y) (_mm_div_ps(x,y)) // Fused multiply-add, defined as [+-]x*y[+-]z #define k4madd(x,y,z) (k4add(k4mul(x,y),z)) #define k4msub(x,y,z) (k4sub(k4mul(x,y),z)) #define k4nmadd(x,y,z) (k4sub(k4neg(z),k4mul(x,y))) #define k4nmsub(x,y,z) (k4sub(z,k4mul(x,y))) // Cheap functions #define k4fabs(x) (_mm_andnot_ps(k4sign_mask,x)) #define k4fmax(x,y) (_mm_max_ps(x,y)) #define k4fmin(x,y) (_mm_min_ps(x,y)) #define k4fnabs(x) (_mm_or_ps(k4sign_mask,x)) // TODO: maybe use rsqrt and Newton-Raphson #define k4sqrt(x) (_mm_sqrt_ps(x)) // Expensive functions #define K4REPL(f,x_) \ ({ \ CCTK_REAL4_VEC const xx=(x_); \ CCTK_REAL4_VEC const x=xx; \ vec4_set(f(vec4_elt0(x)), \ f(vec4_elt1(x)), \ f(vec4_elt2(x)), \ f(vec4_elt3(x))); \ }) #define K4REPL2(f,x_,a_) \ ({ \ CCTK_REAL4_VEC const xx=(x_); \ CCTK_REAL4_VEC const x=xx; \ CCTK_REAL4 const aa=(a_); \ CCTK_REAL4 const a=aa; \ vec4_set(f(vec4_elt0(x),a), \ f(vec4_elt1(x),a), \ f(vec4_elt2(x),a), \ f(vec4_elt3(x),a)); \ }) #define k4exp(x) K4REPL(exp,x) #define k4log(x) K4REPL(log,x) #define k4pow(x,a) K4REPL2(pow,x,a) // Choice [sign(x)>0 ? y : z] #ifdef __SSE4_1__ # define k4ifpos(x,y,z) (_mm_blendv_ps(y,z,x)) #elif 0 # ifdef __cplusplus # define k4sgn(x) ({ using namespace std; signbit(x); }) # else # define k4sgn(x) (signbit(x)) # endif # define k4ifpos(x,y,z) \ ({ \ CCTK_REAL4_VEC const xx=(x_); \ CCTK_REAL4_VEC const x=xx; \ CCTK_REAL4_VEC const yy=(y_); \ CCTK_REAL4_VEC const y=yy; \ CCTK_REAL4_VEC const zz=(z_); \ CCTK_REAL4_VEC const z=zz; \ vec4_set(k4sgn(vec4_elt0(x)) ? vec4_elt0(z) : vec4_elt0(y), \ k4sgn(vec4_elt1(x)) ? vec4_elt1(z) : vec4_elt1(y), \ k4sgn(vec4_elt2(x)) ? vec4_elt2(z) : vec4_elt2(y), \ k4sgn(vec4_elt3(x)) ? vec4_elt3(z) : vec4_elt3(y)); \ }) #else # define k4ifpos(x_,y_,z_) \ ({ \ CCTK_REAL4_VEC const xx=(x_); \ CCTK_REAL4_VEC const x=xx; \ CCTK_REAL4_VEC const yy=(y_); \ CCTK_REAL4_VEC const y=yy; \ CCTK_REAL4_VEC const zz=(z_); \ CCTK_REAL4_VEC const z=zz; \ CCTK_REAL4_VEC const mask = _mm_srai_epi32(x, 31); \ /* (y & ~mask) | (z & mask) */ \ _mm_or_ps(_mm_andnot_ps(mask, y), _mm_and_ps(mask, z)); \ }) #endif