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Optimize casts in softgpu #17618

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merged 3 commits into from
Jun 25, 2023
Merged

Optimize casts in softgpu #17618

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795de9b
softgpu: Use SIMD for more Vec4 casts.
unknownbrackets Jun 24, 2023
ae9d343
softgpu: Move wsum_recip out of the triangle loop.
unknownbrackets Jun 24, 2023
15b66ba
softgpu: Make SIMD on x86_32 a bit safer.
unknownbrackets Jun 24, 2023
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131 changes: 97 additions & 34 deletions GPU/Math3D.h
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Original file line number Diff line number Diff line change
Expand Up @@ -580,8 +580,25 @@ class Vec4
#endif

template<typename T2>
Vec4<T2> Cast() const
{
Vec4<T2> Cast() const {
if constexpr (std::is_same<T, float>::value && std::is_same<T2, int>::value) {
#if defined(_M_SSE) && !PPSSPP_ARCH(X86)
return _mm_cvtps_epi32(vec);
#elif defined(_M_SSE)
return _mm_cvtps_epi32(_mm_loadu_ps(&x));
#elif PPSSPP_ARCH(ARM64_NEON)
return vcvtq_s32_f32(ivec);
#endif
}
if constexpr (std::is_same<T, int>::value && std::is_same<T2, float>::value) {
#if defined(_M_SSE) && !PPSSPP_ARCH(X86)
return _mm_cvtepi32_ps(ivec);
#elif defined(_M_SSE)
return _mm_cvtepi32_ps(_mm_loadu_si128(&ivec));
#elif PPSSPP_ARCH(ARM64_NEON)
return vcvtq_f32_s32(ivec);
#endif
}
return Vec4<T2>((T2)x, (T2)y, (T2)z, (T2)w);
}

Expand Down Expand Up @@ -911,10 +928,15 @@ inline void Vec3ByMatrix43(float vecOut[3], const float v[3], const float m[12])
}

inline Vec3f MATH3D_CALL Vec3ByMatrix43(const Vec3f v, const float m[12]) {
#if defined(_M_SSE) && PPSSPP_ARCH(64BIT)
__m128 x = _mm_shuffle_ps(v.vec, v.vec, _MM_SHUFFLE(0, 0, 0, 0));
__m128 y = _mm_shuffle_ps(v.vec, v.vec, _MM_SHUFFLE(1, 1, 1, 1));
__m128 z = _mm_shuffle_ps(v.vec, v.vec, _MM_SHUFFLE(2, 2, 2, 2));
#if defined(_M_SSE)
#if PPSSPP_ARCH(X86)
const __m128 vv = _mm_loadu_ps(&v.x);
#else
const __m128 vv = v.vec;
#endif
__m128 x = _mm_shuffle_ps(vv, vv, _MM_SHUFFLE(0, 0, 0, 0));
__m128 y = _mm_shuffle_ps(vv, vv, _MM_SHUFFLE(1, 1, 1, 1));
__m128 z = _mm_shuffle_ps(vv, vv, _MM_SHUFFLE(2, 2, 2, 2));
return Vec3ByMatrix43Internal(x, y, z, m);
#elif PPSSPP_ARCH(ARM64_NEON)
return Vec3ByMatrix43Internal(v.vec, m);
Expand Down Expand Up @@ -970,10 +992,15 @@ inline void Vec3ByMatrix44(float vecOut[4], const float v[3], const float m[16])
}

inline Vec4f MATH3D_CALL Vec3ByMatrix44(const Vec3f v, const float m[16]) {
#if defined(_M_SSE) && PPSSPP_ARCH(64BIT)
__m128 x = _mm_shuffle_ps(v.vec, v.vec, _MM_SHUFFLE(0, 0, 0, 0));
__m128 y = _mm_shuffle_ps(v.vec, v.vec, _MM_SHUFFLE(1, 1, 1, 1));
__m128 z = _mm_shuffle_ps(v.vec, v.vec, _MM_SHUFFLE(2, 2, 2, 2));
#if defined(_M_SSE)
#if PPSSPP_ARCH(X86)
const __m128 vv = _mm_loadu_ps(&v.x);
#else
const __m128 vv = v.vec;
#endif
__m128 x = _mm_shuffle_ps(vv, vv, _MM_SHUFFLE(0, 0, 0, 0));
__m128 y = _mm_shuffle_ps(vv, vv, _MM_SHUFFLE(1, 1, 1, 1));
__m128 z = _mm_shuffle_ps(vv, vv, _MM_SHUFFLE(2, 2, 2, 2));
return Vec3ByMatrix44Internal(x, y, z, m);
#elif PPSSPP_ARCH(ARM64_NEON)
return Vec3ByMatrix44Internal(v.vec, m);
Expand Down Expand Up @@ -1029,10 +1056,15 @@ inline void Norm3ByMatrix43(float vecOut[3], const float v[3], const float m[12]
}

inline Vec3f MATH3D_CALL Norm3ByMatrix43(const Vec3f v, const float m[12]) {
#if defined(_M_SSE) && PPSSPP_ARCH(64BIT)
__m128 x = _mm_shuffle_ps(v.vec, v.vec, _MM_SHUFFLE(0, 0, 0, 0));
__m128 y = _mm_shuffle_ps(v.vec, v.vec, _MM_SHUFFLE(1, 1, 1, 1));
__m128 z = _mm_shuffle_ps(v.vec, v.vec, _MM_SHUFFLE(2, 2, 2, 2));
#if defined(_M_SSE)
#if PPSSPP_ARCH(X86)
const __m128 vv = _mm_loadu_ps(&v.x);
#else
const __m128 vv = v.vec;
#endif
__m128 x = _mm_shuffle_ps(vv, vv, _MM_SHUFFLE(0, 0, 0, 0));
__m128 y = _mm_shuffle_ps(vv, vv, _MM_SHUFFLE(1, 1, 1, 1));
__m128 z = _mm_shuffle_ps(vv, vv, _MM_SHUFFLE(2, 2, 2, 2));
return Norm3ByMatrix43Internal(x, y, z, m);
#elif PPSSPP_ARCH(ARM64_NEON)
return Norm3ByMatrix43Internal(v.vec, m);
Expand Down Expand Up @@ -1196,7 +1228,7 @@ __forceinline unsigned int Vec3<float>::ToRGB() const
#if PPSSPP_ARCH(64BIT)
__m128i c = _mm_cvtps_epi32(_mm_mul_ps(vec, _mm_set_ps1(255.0f)));
#else
__m128i c = _mm_cvtps_epi32(_mm_mul_ps(_mm_loadu_ps((float *)&vec), _mm_set_ps1(255.0f)));
__m128i c = _mm_cvtps_epi32(_mm_mul_ps(_mm_loadu_ps(&x), _mm_set_ps1(255.0f)));
#endif
__m128i c16 = _mm_packs_epi32(c, c);
return _mm_cvtsi128_si32(_mm_packus_epi16(c16, c16)) & 0x00FFFFFF;
Expand Down Expand Up @@ -1280,7 +1312,7 @@ __forceinline unsigned int Vec4<float>::ToRGBA() const
#if PPSSPP_ARCH(64BIT)
__m128i c = _mm_cvtps_epi32(_mm_mul_ps(vec, _mm_set_ps1(255.0f)));
#else
__m128i c = _mm_cvtps_epi32(_mm_mul_ps(_mm_loadu_ps((float *)&vec), _mm_set_ps1(255.0f)));
__m128i c = _mm_cvtps_epi32(_mm_mul_ps(_mm_loadu_ps(&x), _mm_set_ps1(255.0f)));
#endif
__m128i c16 = _mm_packs_epi32(c, c);
return _mm_cvtsi128_si32(_mm_packus_epi16(c16, c16));
Expand Down Expand Up @@ -1326,60 +1358,91 @@ __forceinline void Vec4<T>::ToRGBA(u8 *rgba) const

// Vec3<float> operation
template<>
inline void Vec3<float>::operator += (const Vec3<float> &other)
{
inline void Vec3<float>::operator += (const Vec3<float> &other) {
#if PPSSPP_ARCH(X86)
*this = _mm_add_ps(_mm_loadu_ps(&x), _mm_loadu_ps(&other.x));
#else
vec = _mm_add_ps(vec, other.vec);
#endif
}

template<>
inline Vec3<float> Vec3<float>::operator + (const Vec3 &other) const
{
inline Vec3<float> Vec3<float>::operator + (const Vec3 &other) const {
#if PPSSPP_ARCH(X86)
return Vec3<float>(_mm_add_ps(_mm_loadu_ps(&x), _mm_loadu_ps(&other.x)));
#else
return Vec3<float>(_mm_add_ps(vec, other.vec));
#endif
}

template<>
inline Vec3<float> Vec3<float>::operator * (const Vec3 &other) const
{
inline Vec3<float> Vec3<float>::operator * (const Vec3 &other) const {
#if PPSSPP_ARCH(X86)
return Vec3<float>(_mm_mul_ps(_mm_loadu_ps(&x), _mm_loadu_ps(&other.x)));
#else
return Vec3<float>(_mm_mul_ps(vec, other.vec));
#endif
}

template<> template<>
inline Vec3<float> Vec3<float>::operator * (const float &other) const
{
inline Vec3<float> Vec3<float>::operator * (const float &other) const {
#if PPSSPP_ARCH(X86)
return Vec3<float>(_mm_mul_ps(_mm_loadu_ps(&x), _mm_set_ps1(other)));
#else
return Vec3<float>(_mm_mul_ps(vec, _mm_set_ps1(other)));
#endif
}

// Vec4<float> operation
template<>
inline void Vec4<float>::operator += (const Vec4<float> &other)
{
inline void Vec4<float>::operator += (const Vec4<float> &other) {
#if PPSSPP_ARCH(X86)
*this = _mm_add_ps(_mm_loadu_ps(&x), _mm_loadu_ps(&other.x));
#else
vec = _mm_add_ps(vec, other.vec);
#endif
}

template<>
inline Vec4<float> Vec4<float>::operator + (const Vec4 &other) const
{
inline Vec4<float> Vec4<float>::operator + (const Vec4 &other) const {
#if PPSSPP_ARCH(X86)
return Vec4<float>(_mm_add_ps(_mm_loadu_ps(&x), _mm_loadu_ps(&other.x)));
#else
return Vec4<float>(_mm_add_ps(vec, other.vec));
#endif
}

template<>
inline Vec4<float> Vec4<float>::operator * (const Vec4 &other) const
{
inline Vec4<float> Vec4<float>::operator * (const Vec4 &other) const {
#if PPSSPP_ARCH(X86)
return Vec4<float>(_mm_mul_ps(_mm_loadu_ps(&x), _mm_loadu_ps(&other.x)));
#else
return Vec4<float>(_mm_mul_ps(vec, other.vec));
#endif
}

template<> template<>
inline Vec4<float> Vec4<float>::operator * (const float &other) const
{
inline Vec4<float> Vec4<float>::operator * (const float &other) const {
#if PPSSPP_ARCH(X86)
return Vec4<float>(_mm_mul_ps(_mm_loadu_ps(&x), _mm_set_ps1(other)));
#else
return Vec4<float>(_mm_mul_ps(vec, _mm_set_ps1(other)));
#endif
}

// Vec3<float> cross product
template<>
inline Vec3<float> Cross(const Vec3<float> &a, const Vec3<float> &b)
{
const __m128 left = _mm_mul_ps(_mm_shuffle_ps(a.vec, a.vec, _MM_SHUFFLE(3, 0, 2, 1)), _mm_shuffle_ps(b.vec, b.vec, _MM_SHUFFLE(3, 1, 0, 2)));
const __m128 right = _mm_mul_ps(_mm_shuffle_ps(a.vec, a.vec, _MM_SHUFFLE(3, 1, 0, 2)), _mm_shuffle_ps(b.vec, b.vec, _MM_SHUFFLE(3, 0, 2, 1)));
#if PPSSPP_ARCH(X86)
__m128 avec = _mm_loadu_ps(&a.x);
__m128 bvec = _mm_loadu_ps(&b.x);
#else
__m128 avec = a.vec;
__m128 bvec = b.vec;
#endif
const __m128 left = _mm_mul_ps(_mm_shuffle_ps(avec, avec, _MM_SHUFFLE(3, 0, 2, 1)), _mm_shuffle_ps(bvec, bvec, _MM_SHUFFLE(3, 1, 0, 2)));
const __m128 right = _mm_mul_ps(_mm_shuffle_ps(avec, avec, _MM_SHUFFLE(3, 1, 0, 2)), _mm_shuffle_ps(bvec, bvec, _MM_SHUFFLE(3, 0, 2, 1)));
return _mm_sub_ps(left, right);
}
#endif
Expand Down
5 changes: 3 additions & 2 deletions GPU/Software/Rasterizer.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -901,6 +901,9 @@ void DrawTriangleSlice(
Vec4<int> w1_base = e1.Start(v2.screenpos, v0.screenpos, pprime);
Vec4<int> w2_base = e2.Start(v0.screenpos, v1.screenpos, pprime);

// The sum of weights should remain constant as we move toward/away from the edges.
const Vec4<float> wsum_recip = EdgeRecip(w0_base, w1_base, w2_base);

// All the z values are the same, no interpolation required.
// This is common, and when we interpolate, we lose accuracy.
const bool flatZ = v0.screenpos.z == v1.screenpos.z && v0.screenpos.z == v2.screenpos.z;
Expand Down Expand Up @@ -963,8 +966,6 @@ void DrawTriangleSlice(
// If p is on or inside all edges, render pixel
Vec4<int> mask = MakeMask(w0, w1, w2, bias0, bias1, bias2, scissor_mask);
if (AnyMask<useSSE4>(mask)) {
Vec4<float> wsum_recip = EdgeRecip(w0, w1, w2);

Vec4<int> z;
if (flatZ) {
z = Vec4<int>::AssignToAll(v2.screenpos.z);
Expand Down