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dot_fn_body.h
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#define dot_fn_body(name, _stride, itype, vec, otype, init_fn, sum_fn, mul_fn, vec_reduce_fn) \
otype BMAS_##name(const long n, \
itype *x, const long incx, \
itype *y, const long incy){ \
itype *x_end = x + incx * n; \
vec va, vb, vc; \
vec acc = BMAS_vector_##init_fn(); \
const int stride = _stride; \
if (incx == 1 && incy == 1){ \
itype *simd_end = x + (n/stride)*stride; \
while(x != simd_end){ \
va = vec##_load(x); \
vb = vec##_load(y); \
vc = BMAS_vector_##mul_fn(va, vb); \
acc = BMAS_vector_##sum_fn(acc, vc); \
x += stride; \
y += stride; \
} \
}else if(incy == 1){ \
otype* simd_end = y + (n/stride)*stride; \
while(y != simd_end){ \
va = vec##_make(x, incx, sizeof(itype)); \
vb = vec##_load(y); \
vc = BMAS_vector_##mul_fn(va, vb); \
acc = BMAS_vector_##sum_fn(acc, vc); \
x += stride*incx; \
y += stride; \
} \
}else if(incx == 1){ \
itype* simd_end = x + (n/stride)*stride; \
while(x != simd_end){ \
va = vec##_load(x); \
vb = vec##_make(y, incy, sizeof(itype)); \
vc = BMAS_vector_##mul_fn(va, vb); \
acc = BMAS_vector_##sum_fn(acc, vc); \
x += stride; \
y += stride*incy; \
} \
}else{ \
long i=0; \
const long simd_end = (n/stride)*stride; \
while(i != simd_end){ \
va = vec##_make(x, incx, sizeof(itype)); \
vb = vec##_make(y, incy, sizeof(itype)); \
vc = BMAS_vector_##mul_fn(va, vb); \
acc = BMAS_vector_##sum_fn(acc, vc); \
i += stride; \
x += stride * incx; \
y += stride * incy; \
} \
} \
\
otype result = BMAS_vector_##vec_reduce_fn(acc); \
while(x!=x_end){ \
result += x[0] * y[0]; \
x += incx; \
y += incy; \
} \
return result; \
};