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608f9bcd67
Separated out from my gpu-determinism branch by request. It's not a big commit; I just like to write long commit messages. The main reason to kill it is hopefully a slight performance improvement from avoiding the double switch (especially in single core mode); however, this also improves cycle calculation, as described below. - FifoCommandRunnable is removed; in its stead, Decode returns the number of cycles (which only matters for "sync" GPU mode), or 0 if there was not enough data, and is also responsible for unknown opcode alerts. Decode and DecodeSemiNop are almost identical, so the latter is replaced with a skipped_frame parameter to Decode. Doesn't mean we can't improve skipped_frame mode to do less work; if, at such a point, branching on it has too much overhead (it certainly won't now), it can always be changed to a template parameter. - FifoCommandRunnable used a fixed, large cycle count for display lists, regardless of the contents. Presumably the actual hardware's processing time is mostly the processing time of whatever commands are in the list, and with this change InterpretDisplayList can just return the list's cycle count to be added to the total. (Since the calculation for this is part of Decode, it didn't seem easy to split this change up.) To facilitate this, Decode also gains an explicit 'end' parameter in lieu of FifoCommandRunnable's call to GetVideoBufferEndPtr, which can point to there or to the end of a display list (or elsewhere in gpu-determinism, but that's another story). Also, as a small optimization, InterpretDisplayList now calls OpcodeDecoder_Run rather than having its own Decode loop, to allow Decode to be inlined (haven't checked whether this actually happens though). skipped_frame mode still does not traverse display lists and uses the old fake value of 45 cycles. degasus has suggested that this hack is not essential for performance and can be removed, but I want to separate any potential performance impact of that from this commit.
42 lines
1.4 KiB
C
42 lines
1.4 KiB
C
// Copyright 2013 Dolphin Emulator Project
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// Licensed under GPLv2
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// Refer to the license.txt file included.
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#pragma once
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#define GX_NOP 0x00
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#define GX_LOAD_BP_REG 0x61
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#define GX_LOAD_CP_REG 0x08
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#define GX_LOAD_XF_REG 0x10
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#define GX_LOAD_INDX_A 0x20
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#define GX_LOAD_INDX_B 0x28
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#define GX_LOAD_INDX_C 0x30
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#define GX_LOAD_INDX_D 0x38
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#define GX_CMD_CALL_DL 0x40
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#define GX_CMD_UNKNOWN_METRICS 0x44
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#define GX_CMD_INVL_VC 0x48
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#define GX_PRIMITIVE_MASK 0x78
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#define GX_PRIMITIVE_SHIFT 3
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#define GX_VAT_MASK 0x07
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// These values are the values extracted using GX_PRIMITIVE_MASK
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// and GX_PRIMITIVE_SHIFT.
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// GX_DRAW_QUADS_2 behaves the same way as GX_DRAW_QUADS.
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#define GX_DRAW_QUADS 0x0 // 0x80
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#define GX_DRAW_QUADS_2 0x1 // 0x88
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#define GX_DRAW_TRIANGLES 0x2 // 0x90
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#define GX_DRAW_TRIANGLE_STRIP 0x3 // 0x98
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#define GX_DRAW_TRIANGLE_FAN 0x4 // 0xA0
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#define GX_DRAW_LINES 0x5 // 0xA8
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#define GX_DRAW_LINE_STRIP 0x6 // 0xB0
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#define GX_DRAW_POINTS 0x7 // 0xB8
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extern bool g_bRecordFifoData;
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void OpcodeDecoder_Init();
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void OpcodeDecoder_Shutdown();
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u32 OpcodeDecoder_Run(bool skipped_frame, u8* end);
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