fabi/Xenia-Canary
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

[Base/GPU] Cleanup float comparisons and NaN and -0 in clamping

Browse Source 
C++ relational operators are supposed to raise FE_INVALID if an argument is
NaN, use std::isless/greater[equal] instead where they were easy to locate
(though there are other places possibly, mostly min/max and clamp usage was
checked).

Also fixes a copy-paste error making the CPU shader interpreter execute
MINs as MAXs instead.
This commit is contained in:
Triang3l
2024-05-12 19:21:37 +03:00
parent f964290ea8
commit a3304d252f
9 changed files with 143 additions and 144 deletions
Download Patch File Download Diff File Expand all files Collapse all files

25
src/xenia/gpu/draw_util.cc
View File

@@ -399,16 +399,11 @@ void GetHostViewportInfo(const RegisterFile& regs,
float offset_axis = offset_base_xy[i] + offset_add_xy[i];
float scale_axis = scale_xy[i];
float scale_axis_abs = std::abs(scale_xy[i]);
float axis_0 = offset_axis - scale_axis_abs;
float axis_1 = offset_axis + scale_axis_abs;
float axis_max_unscaled_float = float(xy_max_unscaled[i]);
// max(0.0f, xy) drops NaN and < 0 - max picks the first argument in the
// !(a < b) case (always for NaN), min as float (axis_max_unscaled_float
// is well below 2^24) to safely drop very large values.
uint32_t axis_0_int =
uint32_t(std::min(axis_max_unscaled_float, std::max(0.0f, axis_0)));
uint32_t axis_1_int =
uint32_t(std::min(axis_max_unscaled_float, std::max(0.0f, axis_1)));
uint32_t axis_0_int = uint32_t(xe::clamp_float(
offset_axis - scale_axis_abs, 0.0f, axis_max_unscaled_float));
uint32_t axis_1_int = uint32_t(xe::clamp_float(
offset_axis + scale_axis_abs, 0.0f, axis_max_unscaled_float));
uint32_t axis_extent_int = axis_1_int - axis_0_int;
viewport_info_out.xy_offset[i] = axis_0_int * axis_resolution_scale;
viewport_info_out.xy_extent[i] = axis_extent_int * axis_resolution_scale;
@@ -511,8 +506,8 @@ void GetHostViewportInfo(const RegisterFile& regs,
// extension. But cases when this really matters are yet to be found -
// trying to fix this will result in more correct depth values, but
// incorrect clipping.
z_min = xe::saturate_unsigned(host_clip_offset_z);
z_max = xe::saturate_unsigned(host_clip_offset_z + host_clip_scale_z);
z_min = xe::saturate(host_clip_offset_z);
z_max = xe::saturate(host_clip_offset_z + host_clip_scale_z);
// Direct3D 12 doesn't allow reverse depth range - on some drivers it
// works, on some drivers it doesn't, actually, but it was never
// explicitly allowed by the specification.
@@ -877,10 +872,10 @@ bool GetResolveInfo(const RegisterFile& regs, const Memory& memory,
GetScissor(regs, scissor, false);
int32_t scissor_right = int32_t(scissor.offset[0] + scissor.extent[0]);
int32_t scissor_bottom = int32_t(scissor.offset[1] + scissor.extent[1]);
x0 = xe::clamp(x0, int32_t(scissor.offset[0]), scissor_right);
y0 = xe::clamp(y0, int32_t(scissor.offset[1]), scissor_bottom);
x1 = xe::clamp(x1, int32_t(scissor.offset[0]), scissor_right);
y1 = xe::clamp(y1, int32_t(scissor.offset[1]), scissor_bottom);
x0 = std::clamp(x0, int32_t(scissor.offset[0]), scissor_right);
y0 = std::clamp(y0, int32_t(scissor.offset[1]), scissor_bottom);
x1 = std::clamp(x1, int32_t(scissor.offset[0]), scissor_right);
y1 = std::clamp(y1, int32_t(scissor.offset[1]), scissor_bottom);
assert_true(x0 <= x1 && y0 <= y1);