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// -*- mode: c++ -*-
// Copyright (c) 2025, Intel Corporation
// SPDX-License-Identifier: BSD-3-Clause
// @file short_vec.isph
// @brief Portion of the ISPC standard library supporting short vector types.
// Unlike stdlib.isph which is included by default, this file is not implicitly
// included. The user must explicitly include it in their ISPC code to use the
// functions defined here. We do this to avoid polluting every single
// compilation with extra processing of quite a few template functions.
#pragma once
// Below the place for the real implementations of the functions using templates
// These are macro generators for template functions that extend element-wise
// standard library functions by adding support for short vectors. They take a
// function name as an argument and help reduce copy-paste. There are two
// versions of the macro: one for uniform and one for varying short vectors.
// The number of function arguments in the macros depends on their suffix,
// e.g., ARG2 indicates that the function takes two arguments.
#define SHORT_VEC_UNIFORM_ARG1(FUNC) \
template <typename T, uint N> uniform T<N> FUNC(uniform T<N> a) { \
uniform T<N> result; \
foreach (i = 0 ... N) { \
result[i] = FUNC(a[i]); \
} \
return result; \
}
#define SHORT_VEC_VARYING_ARG1(FUNC) \
template <typename T, uint N> varying T<N> FUNC(varying T<N> a) { \
varying T<N> result; \
for (uniform int i = 0; i < N; i++) { \
result[i] = FUNC(a[i]); \
} \
return result; \
}
#define SHORT_VEC_UNIFORM_ARG1_BOOLRET(FUNC) \
template <typename T, uint N> uniform bool<N> FUNC(uniform T<N> a) { \
uniform bool<N> result; \
foreach (i = 0 ... N) { \
result[i] = FUNC(a[i]); \
} \
return result; \
}
#define SHORT_VEC_VARYING_ARG1_BOOLRET(FUNC) \
template <typename T, uint N> varying bool<N> FUNC(varying T<N> a) { \
varying bool<N> result; \
for (uniform int i = 0; i < N; i++) { \
result[i] = FUNC(a[i]); \
} \
return result; \
}
#define SHORT_VEC_UNIFORM_ARG2(FUNC) \
template <typename T, uint N> uniform T<N> FUNC(uniform T<N> a, uniform T<N> b) { \
uniform T<N> result; \
foreach (i = 0 ... N) { \
result[i] = FUNC(a[i], b[i]); \
} \
return result; \
}
#define SHORT_VEC_VARYING_ARG2(FUNC) \
template <typename T, uint N> varying T<N> FUNC(varying T<N> a, varying T<N> b) { \
varying T<N> result; \
for (uniform int i = 0; i < N; i++) { \
result[i] = FUNC(a[i], b[i]); \
} \
return result; \
}
#define SHORT_VEC_UNIFORM_ARG3(FUNC) \
template <typename T, uint N> uniform T<N> FUNC(uniform T<N> a, uniform T<N> b, uniform T<N> c) { \
uniform T<N> result; \
foreach (i = 0 ... N) { \
result[i] = FUNC(a[i], b[i], c[i]); \
} \
return result; \
}
#define SHORT_VEC_VARYING_ARG3(FUNC) \
template <typename T, uint N> varying T<N> FUNC(varying T<N> a, varying T<N> b, varying T<N> c) { \
varying T<N> result; \
for (uniform int i = 0; i < N; i++) { \
result[i] = FUNC(a[i], b[i], c[i]); \
} \
return result; \
}
#define SHORT_VEC_ARG1(FUNC) \
SHORT_VEC_UNIFORM_ARG1(FUNC) \
SHORT_VEC_VARYING_ARG1(FUNC)
#define SHORT_VEC_ARG1_BOOLRET(FUNC) \
SHORT_VEC_UNIFORM_ARG1_BOOLRET(FUNC) \
SHORT_VEC_VARYING_ARG1_BOOLRET(FUNC)
#define SHORT_VEC_ARG2(FUNC) \
SHORT_VEC_UNIFORM_ARG2(FUNC) \
SHORT_VEC_VARYING_ARG2(FUNC)
#define SHORT_VEC_ARG3(FUNC) \
SHORT_VEC_UNIFORM_ARG3(FUNC) \
SHORT_VEC_VARYING_ARG3(FUNC)
// Generate the template functions for short vectors
SHORT_VEC_ARG1(abs)
SHORT_VEC_ARG2(min)
SHORT_VEC_ARG2(max)
SHORT_VEC_ARG3(clamp)
SHORT_VEC_ARG1_BOOLRET(isnan)
SHORT_VEC_ARG1_BOOLRET(isinf)
SHORT_VEC_ARG1_BOOLRET(isfinite)
SHORT_VEC_ARG1(round)
SHORT_VEC_ARG1(floor)
SHORT_VEC_ARG1(ceil)
SHORT_VEC_ARG1(trunc)
SHORT_VEC_ARG1(rcp)
SHORT_VEC_ARG1(rcp_fast)
SHORT_VEC_ARG1(sqrt)
SHORT_VEC_ARG1(rsqrt)
SHORT_VEC_ARG1(rsqrt_fast)
SHORT_VEC_ARG1(sin)
SHORT_VEC_ARG1(asin)
SHORT_VEC_ARG1(cos)
SHORT_VEC_ARG1(acos)
SHORT_VEC_ARG1(tan)
SHORT_VEC_ARG1(atan)
SHORT_VEC_ARG1(exp)
SHORT_VEC_ARG1(log)
SHORT_VEC_ARG1(cbrt)
SHORT_VEC_ARG2(atan2)
SHORT_VEC_ARG2(pow)
SHORT_VEC_ARG2(fmod)
// Previous macro are not needed anymore
#undef SHORT_VEC_UNIFORM_ARG1
#undef SHORT_VEC_VARYING_ARG1
#undef SHORT_VEC_UNIFORM_ARG1_BOOLRET
#undef SHORT_VEC_VARYING_ARG1_BOOLRET
#undef SHORT_VEC_UNIFORM_ARG2
#undef SHORT_VEC_VARYING_ARG2
#undef SHORT_VEC_UNIFORM_ARG3
#undef SHORT_VEC_VARYING_ARG3
#undef SHORT_VEC_ARG1
#undef SHORT_VEC_ARG1_BOOLRET
#undef SHORT_VEC_ARG2
#undef SHORT_VEC_ARG3
// Short vector functions with a custom implementation
template <typename T, uint N> inline uniform T<N> select(uniform bool cond, uniform T<N> t, uniform T<N> f) {
uniform T<N> result;
foreach (i = 0 ... N) {
result[i] = select(cond, t[i], f[i]);
}
return result;
}
template <typename T, uint N> inline uniform T<N> select(uniform bool<N> cond, uniform T<N> t, uniform T<N> f) {
uniform T<N> result;
foreach (i = 0 ... N) {
result[i] = select(cond[i], t[i], f[i]);
}
return result;
}
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