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/*
* Copyright (c) 2021, Stephan Unverwerth <s.unverwerth@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/SIMD.h>
// Functions returning vectors or accepting vector arguments have different calling conventions
// depending on whether the target architecture supports SSE or not. GCC generates warning "psabi"
// when compiling for non-SSE architectures. We disable this warning because these functions
// are static and should never be visible from outside the translation unit that includes this header.
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wpsabi"
namespace AK::SIMD {
// SIMD Vector Expansion
ALWAYS_INLINE static constexpr f32x4 expand4(float f)
{
return f32x4 { f, f, f, f };
}
ALWAYS_INLINE static constexpr i32x4 expand4(i32 i)
{
return i32x4 { i, i, i, i };
}
ALWAYS_INLINE static constexpr u32x4 expand4(u32 u)
{
return u32x4 { u, u, u, u };
}
// Casting
template<typename TSrc>
ALWAYS_INLINE static u8x4 to_u8x4(TSrc v)
{
return __builtin_convertvector(v, u8x4);
}
template<typename TSrc>
ALWAYS_INLINE static u16x4 to_u16x4(TSrc v)
{
return __builtin_convertvector(v, u16x4);
}
template<typename TSrc>
ALWAYS_INLINE static u32x4 to_u32x4(TSrc v)
{
return __builtin_convertvector(v, u32x4);
}
template<typename TSrc>
ALWAYS_INLINE static i32x4 to_i32x4(TSrc v)
{
return __builtin_convertvector(v, i32x4);
}
template<typename TSrc>
ALWAYS_INLINE static f32x4 to_f32x4(TSrc v)
{
return __builtin_convertvector(v, f32x4);
}
// Masking
ALWAYS_INLINE static i32 maskbits(i32x4 mask)
{
#if defined(__SSE__)
return __builtin_ia32_movmskps((f32x4)mask);
#else
return ((mask[0] & 0x80000000) >> 31) | ((mask[1] & 0x80000000) >> 30) | ((mask[2] & 0x80000000) >> 29) | ((mask[3] & 0x80000000) >> 28);
#endif
}
ALWAYS_INLINE static bool all(i32x4 mask)
{
return maskbits(mask) == 15;
}
ALWAYS_INLINE static bool any(i32x4 mask)
{
return maskbits(mask) != 0;
}
ALWAYS_INLINE static bool none(i32x4 mask)
{
return maskbits(mask) == 0;
}
ALWAYS_INLINE static int maskcount(i32x4 mask)
{
constexpr static int count_lut[16] { 0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4 };
return count_lut[maskbits(mask)];
}
// Load / Store
ALWAYS_INLINE static f32x4 load4(float const* a, float const* b, float const* c, float const* d)
{
return f32x4 { *a, *b, *c, *d };
}
ALWAYS_INLINE static u32x4 load4(u32 const* a, u32 const* b, u32 const* c, u32 const* d)
{
return u32x4 { *a, *b, *c, *d };
}
ALWAYS_INLINE static f32x4 load4_masked(float const* a, float const* b, float const* c, float const* d, i32x4 mask)
{
int bits = maskbits(mask);
return f32x4 {
bits & 1 ? *a : 0.f,
bits & 2 ? *b : 0.f,
bits & 4 ? *c : 0.f,
bits & 8 ? *d : 0.f,
};
}
ALWAYS_INLINE static i32x4 load4_masked(u8 const* a, u8 const* b, u8 const* c, u8 const* d, i32x4 mask)
{
int bits = maskbits(mask);
return i32x4 {
bits & 1 ? *a : 0,
bits & 2 ? *b : 0,
bits & 4 ? *c : 0,
bits & 8 ? *d : 0,
};
}
ALWAYS_INLINE static u32x4 load4_masked(u32 const* a, u32 const* b, u32 const* c, u32 const* d, i32x4 mask)
{
int bits = maskbits(mask);
return u32x4 {
bits & 1 ? *a : 0u,
bits & 2 ? *b : 0u,
bits & 4 ? *c : 0u,
bits & 8 ? *d : 0u,
};
}
template<typename VectorType, typename UnderlyingType = decltype(declval<VectorType>()[0])>
ALWAYS_INLINE static void store4(VectorType v, UnderlyingType* a, UnderlyingType* b, UnderlyingType* c, UnderlyingType* d)
{
*a = v[0];
*b = v[1];
*c = v[2];
*d = v[3];
}
template<typename VectorType, typename UnderlyingType = decltype(declval<VectorType>()[0])>
ALWAYS_INLINE static void store4_masked(VectorType v, UnderlyingType* a, UnderlyingType* b, UnderlyingType* c, UnderlyingType* d, i32x4 mask)
{
int bits = maskbits(mask);
if (bits & 1)
*a = v[0];
if (bits & 2)
*b = v[1];
if (bits & 4)
*c = v[2];
if (bits & 8)
*d = v[3];
}
}
#pragma GCC diagnostic pop
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