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project64/Source/Project64-video/3dmath.cpp

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/***************************************************************************
* *
* Project64-video - A Nintendo 64 gfx plugin. *
* http://www.pj64-emu.com/ *
* Copyright (C) 2017 Project64. All rights reserved. *
* Copyright (C) 2003-2009 Sergey 'Gonetz' Lipski *
* Copyright (C) 2002 Dave2001 *
* *
* License: *
* GNU/GPLv2 http://www.gnu.org/licenses/gpl-2.0.html *
* version 2 of the License, or (at your option) any later version. *
* *
****************************************************************************/
#include "Gfx_1.3.h"
extern "C" {
#ifndef NOSSE
#include <xmmintrin.h>
#endif
}
#include <math.h>
#include "3dmath.h"
#include "trace.h"
void calc_light(VERTEX &v)
{
float light_intensity = 0.0f;
register float color[3] = { rdp.light[rdp.num_lights].r, rdp.light[rdp.num_lights].g, rdp.light[rdp.num_lights].b };
for (uint32_t l = 0; l < rdp.num_lights; l++)
{
light_intensity = DotProduct(rdp.light_vector[l], v.vec);
if (light_intensity > 0.0f)
{
color[0] += rdp.light[l].r * light_intensity;
color[1] += rdp.light[l].g * light_intensity;
color[2] += rdp.light[l].b * light_intensity;
}
}
if (color[0] > 1.0f) color[0] = 1.0f;
if (color[1] > 1.0f) color[1] = 1.0f;
if (color[2] > 1.0f) color[2] = 1.0f;
v.r = (uint8_t)(color[0] * 255.0f);
v.g = (uint8_t)(color[1] * 255.0f);
v.b = (uint8_t)(color[2] * 255.0f);
}
void calc_linear(VERTEX &v)
{
if (g_settings->force_calc_sphere())
{
calc_sphere(v);
return;
}
DECLAREALIGN16VAR(vec[3]);
TransformVector(v.vec, vec, rdp.model);
// TransformVector (v.vec, vec, rdp.combined);
NormalizeVector(vec);
float x, y;
if (!rdp.use_lookat)
{
x = vec[0];
y = vec[1];
}
else
{
x = DotProduct(rdp.lookat[0], vec);
y = DotProduct(rdp.lookat[1], vec);
}
if (x > 1.0f)
x = 1.0f;
else if (x < -1.0f)
x = -1.0f;
if (y > 1.0f)
y = 1.0f;
else if (y < -1.0f)
y = -1.0f;
if (rdp.cur_cache[0])
{
// scale >> 6 is size to map to
v.ou = (acosf(-x) / 3.141592654f) * (rdp.tiles(rdp.cur_tile).org_s_scale >> 6);
v.ov = (acosf(-y) / 3.141592654f) * (rdp.tiles(rdp.cur_tile).org_t_scale >> 6);
}
v.uv_scaled = 1;
WriteTrace(TraceRDP, TraceVerbose, "calc linear u: %f, v: %f", v.ou, v.ov);
}
void calc_sphere(VERTEX &v)
{
WriteTrace(TraceRDP, TraceDebug, "calc_sphere");
DECLAREALIGN16VAR(vec[3]);
int s_scale, t_scale;
if (g_settings->hacks(CSettings::hack_Chopper))
{
s_scale = minval(rdp.tiles(rdp.cur_tile).org_s_scale >> 6, rdp.tiles(rdp.cur_tile).lr_s);
t_scale = minval(rdp.tiles(rdp.cur_tile).org_t_scale >> 6, rdp.tiles(rdp.cur_tile).lr_t);
}
else
{
s_scale = rdp.tiles(rdp.cur_tile).org_s_scale >> 6;
t_scale = rdp.tiles(rdp.cur_tile).org_t_scale >> 6;
}
TransformVector(v.vec, vec, rdp.model);
// TransformVector (v.vec, vec, rdp.combined);
NormalizeVector(vec);
float x, y;
if (!rdp.use_lookat)
{
x = vec[0];
y = vec[1];
}
else
{
x = DotProduct(rdp.lookat[0], vec);
y = DotProduct(rdp.lookat[1], vec);
}
v.ou = (x * 0.5f + 0.5f) * s_scale;
v.ov = (y * 0.5f + 0.5f) * t_scale;
v.uv_scaled = 1;
WriteTrace(TraceRDP, TraceVerbose, "calc sphere u: %f, v: %f", v.ou, v.ov);
}
float DotProductC(register float *v1, register float *v2)
{
register float result;
result = v1[0] * v2[0] + v1[1] * v2[1] + v1[2] * v2[2];
return(result);
}
void NormalizeVectorC(float *v)
{
register float len;
len = sqrtf(v[0] * v[0] + v[1] * v[1] + v[2] * v[2]);
if (len > 0.0f)
{
v[0] /= len;
v[1] /= len;
v[2] /= len;
}
}
void TransformVectorC(float *src, float *dst, float mat[4][4])
{
dst[0] = mat[0][0] * src[0] + mat[1][0] * src[1] + mat[2][0] * src[2];
dst[1] = mat[0][1] * src[0] + mat[1][1] * src[1] + mat[2][1] * src[2];
dst[2] = mat[0][2] * src[0] + mat[1][2] * src[1] + mat[2][2] * src[2];
}
void InverseTransformVectorC(float *src, float *dst, float mat[4][4])
{
dst[0] = mat[0][0] * src[0] + mat[0][1] * src[1] + mat[0][2] * src[2];
dst[1] = mat[1][0] * src[0] + mat[1][1] * src[1] + mat[1][2] * src[2];
dst[2] = mat[2][0] * src[0] + mat[2][1] * src[1] + mat[2][2] * src[2];
}
void MulMatricesC(float m1[4][4], float m2[4][4], float r[4][4])
{
float row[4][4];
register unsigned int i, j;
for (i = 0; i < 4; i++)
{
for (j = 0; j < 4; j++)
{
row[i][j] = m2[i][j];
}
}
for (i = 0; i < 4; i++)
{
// auto-vectorizable algorithm
// vectorized loop style, such that compilers can
// easily create optimized SSE instructions.
float leftrow[4];
float summand[4][4];
for (j = 0; j < 4; j++)
leftrow[j] = m1[i][j];
for (j = 0; j < 4; j++)
summand[0][j] = leftrow[0] * row[0][j];
for (j = 0; j < 4; j++)
summand[1][j] = leftrow[1] * row[1][j];
for (j = 0; j < 4; j++)
summand[2][j] = leftrow[2] * row[2][j];
for (j = 0; j < 4; j++)
summand[3][j] = leftrow[3] * row[3][j];
for (j = 0; j < 4; j++)
r[i][j] =
summand[0][j]
+ summand[1][j]
+ summand[2][j]
+ summand[3][j]
;
}
}
// 2008.03.29 H.Morii - added SSE 3DNOW! 3x3 1x3 matrix multiplication
// and 3DNOW! 4x4 4x4 matrix multiplication
// 2011-01-03 Balrog - removed because is in NASM format and not 64-bit compatible
// This will need fixing.
MULMATRIX MulMatrices = MulMatricesC;
TRANSFORMVECTOR TransformVector = TransformVectorC;
TRANSFORMVECTOR InverseTransformVector = InverseTransformVectorC;
DOTPRODUCT DotProduct = DotProductC;
NORMALIZEVECTOR NormalizeVector = NormalizeVectorC;
void MulMatricesSSE(float m1[4][4], float m2[4][4], float r[4][4])
{
#if defined(__GNUC__) && !defined(NO_ASM) && !defined(NOSSE)
/* [row][col]*/
typedef float v4sf __attribute__((vector_size(16)));
v4sf row0 = _mm_loadu_ps(m2[0]);
v4sf row1 = _mm_loadu_ps(m2[1]);
v4sf row2 = _mm_loadu_ps(m2[2]);
v4sf row3 = _mm_loadu_ps(m2[3]);
for (int i = 0; i < 4; ++i)
{
v4sf leftrow = _mm_loadu_ps(m1[i]);
// Fill tmp with four copies of leftrow[0]
v4sf tmp = leftrow;
tmp = _mm_shuffle_ps(tmp, tmp, 0);
// Calculate the four first summands
v4sf destrow = tmp * row0;
// Fill tmp with four copies of leftrow[1]
tmp = leftrow;
tmp = _mm_shuffle_ps(tmp, tmp, 1 + (1 << 2) + (1 << 4) + (1 << 6));
destrow += tmp * row1;
// Fill tmp with four copies of leftrow[2]
tmp = leftrow;
tmp = _mm_shuffle_ps(tmp, tmp, 2 + (2 << 2) + (2 << 4) + (2 << 6));
destrow += tmp * row2;
// Fill tmp with four copies of leftrow[3]
tmp = leftrow;
tmp = _mm_shuffle_ps(tmp, tmp, 3 + (3 << 2) + (3 << 4) + (3 << 6));
destrow += tmp * row3;
__builtin_ia32_storeups(r[i], destrow);
}
#elif !defined(NO_ASM) && !defined(NOSSE)
__asm
{
mov eax, dword ptr[r]
mov ecx, dword ptr[m1]
mov edx, dword ptr[m2]
movaps xmm0, [edx]
movaps xmm1, [edx + 16]
movaps xmm2, [edx + 32]
movaps xmm3, [edx + 48]
// r[0][0],r[0][1],r[0][2],r[0][3]
movaps xmm4, xmmword ptr[ecx]
movaps xmm5, xmm4
movaps xmm6, xmm4
movaps xmm7, xmm4
shufps xmm4, xmm4, 00000000b
shufps xmm5, xmm5, 01010101b
shufps xmm6, xmm6, 10101010b
shufps xmm7, xmm7, 11111111b
mulps xmm4, xmm0
mulps xmm5, xmm1
mulps xmm6, xmm2
mulps xmm7, xmm3
addps xmm4, xmm5
addps xmm4, xmm6
addps xmm4, xmm7
movaps xmmword ptr[eax], xmm4
// r[1][0],r[1][1],r[1][2],r[1][3]
movaps xmm4, xmmword ptr[ecx + 16]
movaps xmm5, xmm4
movaps xmm6, xmm4
movaps xmm7, xmm4
shufps xmm4, xmm4, 00000000b
shufps xmm5, xmm5, 01010101b
shufps xmm6, xmm6, 10101010b
shufps xmm7, xmm7, 11111111b
mulps xmm4, xmm0
mulps xmm5, xmm1
mulps xmm6, xmm2
mulps xmm7, xmm3
addps xmm4, xmm5
addps xmm4, xmm6
addps xmm4, xmm7
movaps xmmword ptr[eax + 16], xmm4
// r[2][0],r[2][1],r[2][2],r[2][3]
movaps xmm4, xmmword ptr[ecx + 32]
movaps xmm5, xmm4
movaps xmm6, xmm4
movaps xmm7, xmm4
shufps xmm4, xmm4, 00000000b
shufps xmm5, xmm5, 01010101b
shufps xmm6, xmm6, 10101010b
shufps xmm7, xmm7, 11111111b
mulps xmm4, xmm0
mulps xmm5, xmm1
mulps xmm6, xmm2
mulps xmm7, xmm3
addps xmm4, xmm5
addps xmm4, xmm6
addps xmm4, xmm7
movaps xmmword ptr[eax + 32], xmm4
// r[3][0],r[3][1],r[3][2],r[3][3]
movaps xmm4, xmmword ptr[ecx + 48]
movaps xmm5, xmm4
movaps xmm6, xmm4
movaps xmm7, xmm4
shufps xmm4, xmm4, 00000000b
shufps xmm5, xmm5, 01010101b
shufps xmm6, xmm6, 10101010b
shufps xmm7, xmm7, 11111111b
mulps xmm4, xmm0
mulps xmm5, xmm1
mulps xmm6, xmm2
mulps xmm7, xmm3
addps xmm4, xmm5
addps xmm4, xmm6
addps xmm4, xmm7
movaps xmmword ptr[eax + 48], xmm4
}
#endif // _WIN32
}
void math_init()
{
#ifndef _DEBUG
int IsSSE = FALSE;
#if defined(__GNUC__) && !defined(NO_ASM) && !defined(NOSSE)
int edx, eax;
GLIDE64_TRY
{
#if defined(__x86_64__)
asm volatile(" cpuid; "
: "=a"(eax), "=d"(edx)
: "0"(1)
: "rbx", "rcx"
);
#else
asm volatile(" push %%ebx; "
" push %%ecx; "
" cpuid; "
" pop %%ecx; "
" pop %%ebx; "
: "=a"(eax), "=d"(edx)
: "0"(1)
:
);
#endif
}
GLIDE64_CATCH
{ return; }
// Check for SSE
if (edx & (1 << 25))
IsSSE = TRUE;
#elif !defined(NO_ASM) && !defined(NOSSE)
DWORD dwEdx;
__try
{
__asm
{
mov eax, 1
cpuid
mov dwEdx, edx
}
}
__except (EXCEPTION_EXECUTE_HANDLER)
{
return;
}
if (dwEdx & (1 << 25))
{
if (dwEdx & (1 << 24))
{
__try
{
__asm xorps xmm0, xmm0
IsSSE = TRUE;
}
__except (EXCEPTION_EXECUTE_HANDLER)
{
return;
}
}
}
#endif // _WIN32
if (IsSSE)
{
MulMatrices = MulMatricesSSE;
WriteTrace(TraceGlide64, TraceDebug, "3DNOW! detected.");
}
#endif //_DEBUG
}
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