krzosa/software_rasterizer
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Almost entire thing wide, force inline didn't help perf, prepare to inline

Browse Source 
simd manually
This commit is contained in:
Krzosa Karol
2022-07-05 16:22:42 +02:00
parent 6f1b5ae933
commit 5aff90642f
5 changed files with 283 additions and 62 deletions
Download Patch File Download Diff File Expand all files Collapse all files

70
main.cpp
View File

@@ -288,8 +288,11 @@ F32 edge_function(Vec4 vecp0, Vec4 vecp1, Vec4 p) {
return result;
}
U64 filled_pixel_count;
U64 filled_pixel_total_time;
// #include "optimization_log.cpp"
function
void draw_triangle_nearest(Bitmap* dst, F32 *depth_buffer, Bitmap *src, Vec3 light_direction,
Vec4 p0, Vec4 p1, Vec4 p2,
@@ -328,7 +331,11 @@ void draw_triangle_nearest(Bitmap* dst, F32 *depth_buffer, Bitmap *src, Vec3 lig
F32 Cy1 = dy21 * min_x - dx21 * min_y - C1;
F32 Cy2 = dy02 * min_x - dx02 * min_y - C2;
Vec8 var255 = vec8(255);
Vec8 zero8 = vec8(0);
Vec8 var1 = vec8(1);
Vec8I var0i = vec8i(0);
Vec8I var1i = vec8i(1);
Vec8I var07i = vec8i(0,1,2,3,4,5,6,7);
Vec8 var07 = vec8(0,1,2,3,4,5,6,7);
Vec8 var1_8 = vec8(1,2,3,4,5,6,7,8);
@@ -344,6 +351,7 @@ void draw_triangle_nearest(Bitmap* dst, F32 *depth_buffer, Bitmap *src, Vec3 lig
F32 area = (p1.y - p0.y) * (p2.x - p0.x) - (p1.x - p0.x) * (p2.y - p0.y);
Vec8 area8 = vec8(area);
U64 fill_pixels_begin = __rdtsc();
for (S64 y = min_y; y < max_y; y++) {
Vec8 Cx0 = vec8(Cy0);
Vec8 Cx1 = vec8(Cy1);
@@ -391,10 +399,10 @@ void draw_triangle_nearest(Bitmap* dst, F32 *depth_buffer, Bitmap *src, Vec3 lig
// Origin UV (0,0) is in bottom left
_mm256_maskstore_epi32((int *)depth_pointer, should_fill.simd, interpolated_w.simd);
Vec8I indices = ui + ((vec8i(src->y) - vec8i(1) - vi) * vec8i(src->x));
Vec8I indices = ui + ((vec8i(src->y) - var1i - vi) * vec8i(src->x));
S32 size = src->x * src->y;
indices.simd = _mm256_min_epi32(_mm256_set1_ps(size), indices.simd);
indices.simd = _mm256_max_epi32(_mm256_set1_ps(0), indices.simd);
indices.simd = _mm256_max_epi32(var0i.simd, indices.simd);
//
// Fetch and calculate texel values
@@ -454,10 +462,10 @@ void draw_triangle_nearest(Bitmap* dst, F32 *depth_buffer, Bitmap *src, Vec3 lig
dst_i_b = dst_i_b >> 16 ;
dst_i_g = dst_i_g >> 8;
Vec8 dst_a = convert_vec8i_to_vec8(dst_i_a) / vec8(255);
Vec8 dst_b = convert_vec8i_to_vec8(dst_i_b) / vec8(255);
Vec8 dst_g = convert_vec8i_to_vec8(dst_i_g) / vec8(255);
Vec8 dst_r = convert_vec8i_to_vec8(dst_i_r) / vec8(255);
Vec8 dst_a = convert_vec8i_to_vec8(dst_i_a) / var255;
Vec8 dst_b = convert_vec8i_to_vec8(dst_i_b) / var255;
Vec8 dst_g = convert_vec8i_to_vec8(dst_i_g) / var255;
Vec8 dst_r = convert_vec8i_to_vec8(dst_i_r) / var255;
dst_r *= dst_r;
dst_g *= dst_g;
@@ -465,53 +473,42 @@ void draw_triangle_nearest(Bitmap* dst, F32 *depth_buffer, Bitmap *src, Vec3 lig
// Premultiplied alpha
{
texel_r = texel_r + ((vec8(1)-texel_a) * dst_r);
texel_g = texel_g + ((vec8(1)-texel_a) * dst_g);
texel_b = texel_b + ((vec8(1)-texel_a) * dst_b);
texel_a = texel_a + dst_a - texel_a*dst_a;
dst_r = texel_r + ((var1-texel_a) * dst_r);
dst_g = texel_g + ((var1-texel_a) * dst_g);
dst_b = texel_b + ((var1-texel_a) * dst_b);
dst_a = texel_a + dst_a - texel_a*dst_a;
}
// Almost linear to srgb
{
texel_r.simd = {_mm256_sqrt_ps(texel_r.simd)};
texel_g.simd = {_mm256_sqrt_ps(texel_g.simd)};
texel_b.simd = {_mm256_sqrt_ps(texel_b.simd)};
dst_r.simd = {_mm256_sqrt_ps(dst_r.simd)};
dst_g.simd = {_mm256_sqrt_ps(dst_g.simd)};
dst_b.simd = {_mm256_sqrt_ps(dst_b.simd)};
}
Vec8I result;
for(S64 i = 0; i < 8; i++){
if (should_fill[i]){
Vec4 result_color = {texel_r[i], texel_g[i], texel_b[i], texel_a[i]};
Vec4 dst_color = {dst_r[i], dst_g[i], dst_b[i], dst_a[i]};
#if 0
Vec3 light_color = vec3(0.8,0.8,1);
constexpr F32 ambient_strength = 0.1f; {
Vec3 ambient = ambient_strength * light_color;
Vec3 diffuse = clamp_bot(0.f, -dot(norm, light_direction)) * light_color;
result_color.rgb *= (ambient+diffuse);
}
#endif
U32 color32;
{
U8 red = (U8)(result_color.r * 255);
U8 green = (U8)(result_color.g * 255);
U8 blue = (U8)(result_color.b * 255);
U8 alpha = (U8)(result_color.a * 255);
color32 = (U32)(alpha << 24 | blue << 16 | green << 8 | red << 0);
}
dst_memory[i] = color32;
U8 red = (U8)(dst_r[i] * 255);
U8 green = (U8)(dst_g[i] * 255);
U8 blue = (U8)(dst_b[i] * 255);
U8 alpha = (U8)(dst_a[i] * 255);
result.e[i] = (U32)(alpha << 24 | blue << 16 | green << 8 | red << 0);
}
}
_mm256_maskstore_epi32((int *)dst_memory, should_fill.simd, result.simd);
}
Cy0 -= dx10;
Cy1 -= dx21;
Cy2 -= dx02;
destination += dst->x;
}
U64 end_time = __rdtsc();
filled_pixel_total_time += end_time - fill_pixels_begin;
filled_pixel_count += (max_x - min_x)*(max_y - min_y);
}
function
@@ -808,6 +805,7 @@ main(int argc, char **argv) {
r.camera_pos.x, r.camera_pos.y, r.camera_pos.z, r.camera_yaw.x, r.camera_yaw.y);
// log_info("\nAvg_Time: %llu Time:%llu Count:%llu", filled_pixel_total_time/filled_pixel_count, filled_pixel_total_time, filled_pixel_count);
for(int i = 0; i < ProfileScopeName_Count; i++){
auto *scope = &profile_scopes[i];
if(scope->i == 0) continue;