mirror of https://github.com/ZDoom/gzdoom.git
574 lines
17 KiB
C++
574 lines
17 KiB
C++
/*
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** DrawTriangle code generation
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** Copyright (c) 2016 Magnus Norddahl
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**
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** This software is provided 'as-is', without any express or implied
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** warranty. In no event will the authors be held liable for any damages
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** arising from the use of this software.
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**
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** Permission is granted to anyone to use this software for any purpose,
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** including commercial applications, and to alter it and redistribute it
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** freely, subject to the following restrictions:
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**
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** 1. The origin of this software must not be misrepresented; you must not
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** claim that you wrote the original software. If you use this software
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** in a product, an acknowledgment in the product documentation would be
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** appreciated but is not required.
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** 2. Altered source versions must be plainly marked as such, and must not be
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** misrepresented as being the original software.
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** 3. This notice may not be removed or altered from any source distribution.
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**
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*/
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#include "precomp.h"
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#include "timestamp.h"
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#include "fixedfunction/setuptrianglecodegen.h"
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#include "ssa/ssa_function.h"
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#include "ssa/ssa_scope.h"
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#include "ssa/ssa_for_block.h"
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#include "ssa/ssa_if_block.h"
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#include "ssa/ssa_stack.h"
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#include "ssa/ssa_function.h"
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#include "ssa/ssa_struct_type.h"
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#include "ssa/ssa_value.h"
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void SetupTriangleCodegen::Generate(bool subsectorTest, SSAValue args, SSAValue thread_data)
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{
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this->subsectorTest = subsectorTest;
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LoadArgs(args, thread_data);
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Setup();
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LoopBlockY();
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}
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SSAInt SetupTriangleCodegen::FloatTo28_4(SSAFloat v)
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{
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// SSAInt(SSAFloat::round(16.0f * v), false);
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SSAInt a = SSAInt(v * 32.0f, false);
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return (a + (a.ashr(31) | SSAInt(1))).ashr(1);
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}
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void SetupTriangleCodegen::Setup()
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{
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// 28.4 fixed-point coordinates
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Y1 = FloatTo28_4(v1.y);
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Y2 = FloatTo28_4(v2.y);
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Y3 = FloatTo28_4(v3.y);
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X1 = FloatTo28_4(v1.x);
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X2 = FloatTo28_4(v2.x);
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X3 = FloatTo28_4(v3.x);
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// Deltas
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DX12 = X1 - X2;
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DX23 = X2 - X3;
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DX31 = X3 - X1;
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DY12 = Y1 - Y2;
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DY23 = Y2 - Y3;
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DY31 = Y3 - Y1;
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// Fixed-point deltas
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FDX12 = DX12 << 4;
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FDX23 = DX23 << 4;
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FDX31 = DX31 << 4;
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FDY12 = DY12 << 4;
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FDY23 = DY23 << 4;
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FDY31 = DY31 << 4;
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// Bounding rectangle
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minx = SSAInt::MAX((SSAInt::MIN(SSAInt::MIN(X1, X2), X3) + 0xF).ashr(4), SSAInt(0));
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maxx = SSAInt::MIN((SSAInt::MAX(SSAInt::MAX(X1, X2), X3) + 0xF).ashr(4), clipright - 1);
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miny = SSAInt::MAX((SSAInt::MIN(SSAInt::MIN(Y1, Y2), Y3) + 0xF).ashr(4), SSAInt(0));
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maxy = SSAInt::MIN((SSAInt::MAX(SSAInt::MAX(Y1, Y2), Y3) + 0xF).ashr(4), clipbottom - 1);
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SSAIfBlock if0;
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if0.if_block(minx >= maxx || miny >= maxy);
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if0.end_retvoid();
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// Start in corner of 8x8 block
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minx = minx & ~(q - 1);
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miny = miny & ~(q - 1);
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// Half-edge constants
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C1 = DY12 * X1 - DX12 * Y1;
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C2 = DY23 * X2 - DX23 * Y2;
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C3 = DY31 * X3 - DX31 * Y3;
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// Correct for fill convention
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SSAIfBlock if1;
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if1.if_block(DY12 < SSAInt(0) || (DY12 == SSAInt(0) && DX12 > SSAInt(0)));
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stack_C1.store(C1 + 1);
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if1.else_block();
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stack_C1.store(C1);
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if1.end_block();
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C1 = stack_C1.load();
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SSAIfBlock if2;
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if2.if_block(DY23 < SSAInt(0) || (DY23 == SSAInt(0) && DX23 > SSAInt(0)));
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stack_C2.store(C2 + 1);
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if2.else_block();
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stack_C2.store(C2);
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if2.end_block();
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C2 = stack_C2.load();
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SSAIfBlock if3;
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if3.if_block(DY31 < SSAInt(0) || (DY31 == SSAInt(0) && DX31 > SSAInt(0)));
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stack_C3.store(C3 + 1);
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if3.else_block();
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stack_C3.store(C3);
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if3.end_block();
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C3 = stack_C3.load();
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}
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void SetupTriangleCodegen::LoopBlockY()
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{
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SSAInt blocks_skipped = skipped_by_thread(miny / q, thread);
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stack_y.store(miny + blocks_skipped * q);
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stack_subsectorGBuffer.store(subsectorGBuffer[blocks_skipped * q * pitch]);
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SSAForBlock loop;
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y = stack_y.load();
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subsectorGBuffer = stack_subsectorGBuffer.load();
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loop.loop_block(y < maxy, 0);
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{
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LoopBlockX();
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stack_subsectorGBuffer.store(subsectorGBuffer[q * pitch * thread.num_cores]);
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stack_y.store(y + thread.num_cores * q);
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}
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loop.end_block();
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}
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void SetupTriangleCodegen::LoopBlockX()
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{
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stack_x.store(minx);
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SSAForBlock loop;
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x = stack_x.load();
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loop.loop_block(x < maxx, 0);
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{
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// Corners of block
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x0 = x << 4;
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x1 = (x + q - 1) << 4;
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y0 = y << 4;
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y1 = (y + q - 1) << 4;
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// Evaluate half-space functions
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SSABool a00 = C1 + DX12 * y0 - DY12 * x0 > SSAInt(0);
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SSABool a10 = C1 + DX12 * y0 - DY12 * x1 > SSAInt(0);
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SSABool a01 = C1 + DX12 * y1 - DY12 * x0 > SSAInt(0);
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SSABool a11 = C1 + DX12 * y1 - DY12 * x1 > SSAInt(0);
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SSAInt a = (a00.zext_int() << 0) | (a10.zext_int() << 1) | (a01.zext_int() << 2) | (a11.zext_int() << 3);
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SSABool b00 = C2 + DX23 * y0 - DY23 * x0 > SSAInt(0);
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SSABool b10 = C2 + DX23 * y0 - DY23 * x1 > SSAInt(0);
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SSABool b01 = C2 + DX23 * y1 - DY23 * x0 > SSAInt(0);
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SSABool b11 = C2 + DX23 * y1 - DY23 * x1 > SSAInt(0);
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SSAInt b = (b00.zext_int() << 0) | (b10.zext_int() << 1) | (b01.zext_int() << 2) | (b11.zext_int() << 3);
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SSABool c00 = C3 + DX31 * y0 - DY31 * x0 > SSAInt(0);
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SSABool c10 = C3 + DX31 * y0 - DY31 * x1 > SSAInt(0);
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SSABool c01 = C3 + DX31 * y1 - DY31 * x0 > SSAInt(0);
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SSABool c11 = C3 + DX31 * y1 - DY31 * x1 > SSAInt(0);
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SSAInt c = (c00.zext_int() << 0) | (c10.zext_int() << 1) | (c01.zext_int() << 2) | (c11.zext_int() << 3);
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// Skip block when outside an edge
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SSABool process_block = !(a == SSAInt(0) || b == SSAInt(0) || c == SSAInt(0));
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SetStencilBlock(x / 8 + y / 8 * stencilPitch);
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// Stencil test the whole block, if possible
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if (subsectorTest)
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{
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process_block = process_block && (!StencilIsSingleValue() || SSABool::compare_uge(StencilGetSingle(), stencilTestValue));
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}
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else
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{
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process_block = process_block && (!StencilIsSingleValue() || StencilGetSingle() == stencilTestValue);
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}
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SSAIfBlock branch;
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branch.if_block(process_block);
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// Check if block needs clipping
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SSABool clipneeded = (x + q) > clipright || (y + q) > clipbottom;
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SSABool covered = a == SSAInt(0xF) && b == SSAInt(0xF) && c == SSAInt(0xF) && !clipneeded && StencilIsSingleValue();
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// Accept whole block when totally covered
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SSAIfBlock branch_covered;
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branch_covered.if_block(covered);
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{
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LoopFullBlock();
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}
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branch_covered.else_block();
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{
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SSAIfBlock branch_covered_stencil;
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branch_covered_stencil.if_block(StencilIsSingleValue());
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{
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SSABool stenciltestpass;
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if (subsectorTest)
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{
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stenciltestpass = SSABool::compare_uge(StencilGetSingle(), stencilTestValue);
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}
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else
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{
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stenciltestpass = StencilGetSingle() == stencilTestValue;
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}
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SSAIfBlock branch_stenciltestpass;
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branch_stenciltestpass.if_block(stenciltestpass);
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{
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LoopPartialBlock(true);
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}
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branch_stenciltestpass.end_block();
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}
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branch_covered_stencil.else_block();
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{
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LoopPartialBlock(false);
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}
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branch_covered_stencil.end_block();
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}
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branch_covered.end_block();
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branch.end_block();
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stack_x.store(x + q);
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}
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loop.end_block();
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}
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void SetupTriangleCodegen::LoopFullBlock()
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{
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/*
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if (variant == TriDrawVariant::Stencil)
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{
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StencilClear(stencilWriteValue);
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}
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else if (variant == TriDrawVariant::StencilClose)
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{
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StencilClear(stencilWriteValue);
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for (int iy = 0; iy < q; iy++)
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{
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SSAIntPtr subsectorbuffer = subsectorGBuffer[x + iy * pitch];
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for (int ix = 0; ix < q; ix += 4)
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{
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subsectorbuffer[ix].store_unaligned_vec4i(SSAVec4i(subsectorDepth));
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}
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}
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}
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else
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{
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int pixelsize = truecolor ? 4 : 1;
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AffineW = posx_w;
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for (int i = 0; i < TriVertex::NumVarying; i++)
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AffineVaryingPosY[i] = posx_varying[i];
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for (int iy = 0; iy < q; iy++)
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{
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SSAUBytePtr buffer = dest[(x + iy * pitch) * pixelsize];
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SSAIntPtr subsectorbuffer = subsectorGBuffer[x + iy * pitch];
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SetupAffineBlock();
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for (int ix = 0; ix < q; ix += 4)
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{
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SSAUBytePtr buf = buffer[ix * pixelsize];
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if (truecolor)
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{
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SSAVec16ub pixels16 = buf.load_unaligned_vec16ub(false);
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SSAVec8s pixels8hi = SSAVec8s::extendhi(pixels16);
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SSAVec8s pixels8lo = SSAVec8s::extendlo(pixels16);
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SSAVec4i pixels[4] =
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{
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SSAVec4i::extendlo(pixels8lo),
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SSAVec4i::extendhi(pixels8lo),
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SSAVec4i::extendlo(pixels8hi),
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SSAVec4i::extendhi(pixels8hi)
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};
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for (int sse = 0; sse < 4; sse++)
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{
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if (variant == TriDrawVariant::DrawSubsector || variant == TriDrawVariant::FillSubsector || variant == TriDrawVariant::FuzzSubsector)
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{
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SSABool subsectorTest = subsectorbuffer[ix].load(true) >= subsectorDepth;
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pixels[sse] = subsectorTest.select(ProcessPixel32(pixels[sse], AffineVaryingPosX), pixels[sse]);
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}
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else
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{
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pixels[sse] = ProcessPixel32(pixels[sse], AffineVaryingPosX);
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}
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for (int i = 0; i < TriVertex::NumVarying; i++)
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AffineVaryingPosX[i] = AffineVaryingPosX[i] + AffineVaryingStepX[i];
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}
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buf.store_unaligned_vec16ub(SSAVec16ub(SSAVec8s(pixels[0], pixels[1]), SSAVec8s(pixels[2], pixels[3])));
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}
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else
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{
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SSAVec4i pixelsvec = buf.load_vec4ub(false);
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SSAInt pixels[4] =
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{
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pixelsvec[0],
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pixelsvec[1],
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pixelsvec[2],
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pixelsvec[3]
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};
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for (int sse = 0; sse < 4; sse++)
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{
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if (variant == TriDrawVariant::DrawSubsector || variant == TriDrawVariant::FillSubsector || variant == TriDrawVariant::FuzzSubsector)
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{
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SSABool subsectorTest = subsectorbuffer[ix].load(true) >= subsectorDepth;
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pixels[sse] = subsectorTest.select(ProcessPixel8(pixels[sse], AffineVaryingPosX), pixels[sse]);
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}
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else
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{
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pixels[sse] = ProcessPixel8(pixels[sse], AffineVaryingPosX);
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}
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for (int i = 0; i < TriVertex::NumVarying; i++)
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AffineVaryingPosX[i] = AffineVaryingPosX[i] + AffineVaryingStepX[i];
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}
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buf.store_vec4ub(SSAVec4i(pixels[0], pixels[1], pixels[2], pixels[3]));
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}
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if (variant != TriDrawVariant::DrawSubsector && variant != TriDrawVariant::FillSubsector && variant != TriDrawVariant::FuzzSubsector)
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subsectorbuffer[ix].store_unaligned_vec4i(SSAVec4i(subsectorDepth));
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}
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AffineW = AffineW + gradWY;
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for (int i = 0; i < TriVertex::NumVarying; i++)
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AffineVaryingPosY[i] = AffineVaryingPosY[i] + gradVaryingY[i];
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}
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}
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*/
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}
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void SetupTriangleCodegen::LoopPartialBlock(bool isSingleStencilValue)
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{
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/*
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int pixelsize = truecolor ? 4 : 1;
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if (variant == TriDrawVariant::Stencil || variant == TriDrawVariant::StencilClose)
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{
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if (isSingleStencilValue)
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{
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SSAInt stencilMask = StencilBlockMask.load(false);
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SSAUByte val0 = stencilMask.trunc_ubyte();
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for (int i = 0; i < 8 * 8; i++)
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StencilBlock[i].store(val0);
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StencilBlockMask.store(SSAInt(0));
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}
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SSAUByte lastStencilValue = StencilBlock[0].load(false);
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stack_stencilblock_restored.store(SSABool(true));
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stack_stencilblock_lastval.store(lastStencilValue);
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}
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stack_CY1.store(C1 + DX12 * y0 - DY12 * x0);
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stack_CY2.store(C2 + DX23 * y0 - DY23 * x0);
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stack_CY3.store(C3 + DX31 * y0 - DY31 * x0);
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stack_iy.store(SSAInt(0));
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stack_buffer.store(dest[x * pixelsize]);
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stack_subsectorbuffer.store(subsectorGBuffer[x]);
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stack_AffineW.store(posx_w);
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for (int i = 0; i < TriVertex::NumVarying; i++)
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{
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stack_AffineVaryingPosY[i].store(posx_varying[i]);
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}
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SSAForBlock loopy;
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SSAInt iy = stack_iy.load();
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SSAUBytePtr buffer = stack_buffer.load();
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SSAIntPtr subsectorbuffer = stack_subsectorbuffer.load();
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SSAInt CY1 = stack_CY1.load();
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SSAInt CY2 = stack_CY2.load();
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SSAInt CY3 = stack_CY3.load();
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AffineW = stack_AffineW.load();
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for (int i = 0; i < TriVertex::NumVarying; i++)
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AffineVaryingPosY[i] = stack_AffineVaryingPosY[i].load();
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loopy.loop_block(iy < SSAInt(q), q);
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{
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SetupAffineBlock();
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for (int i = 0; i < TriVertex::NumVarying; i++)
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stack_AffineVaryingPosX[i].store(AffineVaryingPosX[i]);
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stack_CX1.store(CY1);
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stack_CX2.store(CY2);
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stack_CX3.store(CY3);
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stack_ix.store(SSAInt(0));
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SSAForBlock loopx;
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SSABool stencilblock_restored;
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SSAUByte lastStencilValue;
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if (variant == TriDrawVariant::Stencil || variant == TriDrawVariant::StencilClose)
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{
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stencilblock_restored = stack_stencilblock_restored.load();
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lastStencilValue = stack_stencilblock_lastval.load();
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}
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SSAInt ix = stack_ix.load();
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SSAInt CX1 = stack_CX1.load();
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SSAInt CX2 = stack_CX2.load();
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SSAInt CX3 = stack_CX3.load();
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for (int i = 0; i < TriVertex::NumVarying; i++)
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AffineVaryingPosX[i] = stack_AffineVaryingPosX[i].load();
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loopx.loop_block(ix < SSAInt(q), q);
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{
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SSABool visible = (ix + x < clipright) && (iy + y < clipbottom);
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SSABool covered = CX1 > SSAInt(0) && CX2 > SSAInt(0) && CX3 > SSAInt(0) && visible;
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if (!isSingleStencilValue)
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{
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SSAUByte stencilValue = StencilBlock[ix + iy * 8].load(false);
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if (variant == TriDrawVariant::DrawSubsector || variant == TriDrawVariant::FillSubsector || variant == TriDrawVariant::FuzzSubsector)
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{
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covered = covered && SSABool::compare_uge(stencilValue, stencilTestValue) && subsectorbuffer[ix].load(true) >= subsectorDepth;
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}
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else if (variant == TriDrawVariant::StencilClose)
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{
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covered = covered && SSABool::compare_uge(stencilValue, stencilTestValue);
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}
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else
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{
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covered = covered && stencilValue == stencilTestValue;
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}
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}
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else if (variant == TriDrawVariant::DrawSubsector || variant == TriDrawVariant::FillSubsector || variant == TriDrawVariant::FuzzSubsector)
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{
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covered = covered && subsectorbuffer[ix].load(true) >= subsectorDepth;
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}
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SSAIfBlock branch;
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branch.if_block(covered);
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{
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if (variant == TriDrawVariant::Stencil)
|
|
{
|
|
StencilBlock[ix + iy * 8].store(stencilWriteValue);
|
|
}
|
|
else if (variant == TriDrawVariant::StencilClose)
|
|
{
|
|
StencilBlock[ix + iy * 8].store(stencilWriteValue);
|
|
subsectorbuffer[ix].store(subsectorDepth);
|
|
}
|
|
else
|
|
{
|
|
SSAUBytePtr buf = buffer[ix * pixelsize];
|
|
|
|
if (truecolor)
|
|
{
|
|
SSAVec4i bg = buf.load_vec4ub(false);
|
|
buf.store_vec4ub(ProcessPixel32(bg, AffineVaryingPosX));
|
|
}
|
|
else
|
|
{
|
|
SSAUByte bg = buf.load(false);
|
|
buf.store(ProcessPixel8(bg.zext_int(), AffineVaryingPosX).trunc_ubyte());
|
|
}
|
|
|
|
if (variant != TriDrawVariant::DrawSubsector && variant != TriDrawVariant::FillSubsector && variant != TriDrawVariant::FuzzSubsector)
|
|
subsectorbuffer[ix].store(subsectorDepth);
|
|
}
|
|
}
|
|
branch.end_block();
|
|
|
|
if (variant == TriDrawVariant::Stencil || variant == TriDrawVariant::StencilClose)
|
|
{
|
|
SSAUByte newStencilValue = StencilBlock[ix + iy * 8].load(false);
|
|
stack_stencilblock_restored.store(stencilblock_restored && newStencilValue == lastStencilValue);
|
|
stack_stencilblock_lastval.store(newStencilValue);
|
|
}
|
|
|
|
for (int i = 0; i < TriVertex::NumVarying; i++)
|
|
stack_AffineVaryingPosX[i].store(AffineVaryingPosX[i] + AffineVaryingStepX[i]);
|
|
|
|
stack_CX1.store(CX1 - FDY12);
|
|
stack_CX2.store(CX2 - FDY23);
|
|
stack_CX3.store(CX3 - FDY31);
|
|
stack_ix.store(ix + 1);
|
|
}
|
|
loopx.end_block();
|
|
|
|
stack_AffineW.store(AffineW + gradWY);
|
|
for (int i = 0; i < TriVertex::NumVarying; i++)
|
|
stack_AffineVaryingPosY[i].store(AffineVaryingPosY[i] + gradVaryingY[i]);
|
|
stack_CY1.store(CY1 + FDX12);
|
|
stack_CY2.store(CY2 + FDX23);
|
|
stack_CY3.store(CY3 + FDX31);
|
|
stack_buffer.store(buffer[pitch * pixelsize]);
|
|
stack_subsectorbuffer.store(subsectorbuffer[pitch]);
|
|
stack_iy.store(iy + 1);
|
|
}
|
|
loopy.end_block();
|
|
|
|
if (variant == TriDrawVariant::Stencil || variant == TriDrawVariant::StencilClose)
|
|
{
|
|
SSAIfBlock branch;
|
|
SSABool restored = stack_stencilblock_restored.load();
|
|
branch.if_block(restored);
|
|
{
|
|
SSAUByte lastStencilValue = stack_stencilblock_lastval.load();
|
|
StencilClear(lastStencilValue);
|
|
}
|
|
branch.end_block();
|
|
}
|
|
*/
|
|
}
|
|
|
|
void SetupTriangleCodegen::SetStencilBlock(SSAInt block)
|
|
{
|
|
StencilBlock = stencilValues[block * 64];
|
|
StencilBlockMask = stencilMasks[block];
|
|
}
|
|
|
|
SSAUByte SetupTriangleCodegen::StencilGetSingle()
|
|
{
|
|
return StencilBlockMask.load(false).trunc_ubyte();
|
|
}
|
|
|
|
void SetupTriangleCodegen::StencilClear(SSAUByte value)
|
|
{
|
|
StencilBlockMask.store(SSAInt(0xffffff00) | value.zext_int());
|
|
}
|
|
|
|
SSABool SetupTriangleCodegen::StencilIsSingleValue()
|
|
{
|
|
return (StencilBlockMask.load(false) & SSAInt(0xffffff00)) == SSAInt(0xffffff00);
|
|
}
|
|
|
|
void SetupTriangleCodegen::LoadArgs(SSAValue args, SSAValue thread_data)
|
|
{
|
|
pitch = args[0][1].load(true);
|
|
v1 = LoadTriVertex(args[0][2].load(true));
|
|
v2 = LoadTriVertex(args[0][3].load(true));
|
|
v3 = LoadTriVertex(args[0][4].load(true));
|
|
clipright = args[0][6].load(true);
|
|
clipbottom = args[0][8].load(true);
|
|
stencilValues = args[0][14].load(true);
|
|
stencilMasks = args[0][15].load(true);
|
|
stencilPitch = args[0][16].load(true);
|
|
stencilTestValue = args[0][17].load(true);
|
|
stencilWriteValue = args[0][18].load(true);
|
|
subsectorGBuffer = args[0][19].load(true);
|
|
|
|
thread.core = thread_data[0][0].load(true);
|
|
thread.num_cores = thread_data[0][1].load(true);
|
|
thread.pass_start_y = SSAInt(0);
|
|
thread.pass_end_y = SSAInt(32000);
|
|
}
|
|
|
|
SSASetupVertex SetupTriangleCodegen::LoadTriVertex(SSAValue ptr)
|
|
{
|
|
SSASetupVertex v;
|
|
v.x = ptr[0][0].load(true);
|
|
v.y = ptr[0][1].load(true);
|
|
v.z = ptr[0][2].load(true);
|
|
v.w = ptr[0][3].load(true);
|
|
return v;
|
|
}
|