2019-04-22 04:41:09 +01:00
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/*
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* Copyright (C) 2019 Connor Abbott <cwabbott0@gmail.com>
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* Copyright (C) 2019 Lyude Paul <thatslyude@gmail.com>
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* Copyright (C) 2019 Ryan Houdek <Sonicadvance1@gmail.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#ifndef __bifrost_h__
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#define __bifrost_h__
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#include <stdint.h>
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#include <stdbool.h>
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struct bifrost_header {
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unsigned unk0 : 7;
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// If true, convert any infinite result of any floating-point operation to
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// the biggest representable number.
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unsigned suppress_inf: 1;
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// Convert any NaN results to 0.
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unsigned suppress_nan : 1;
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unsigned unk1 : 2;
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// true if the execution mask of the next clause is the same as the mask of
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// the current clause.
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unsigned back_to_back : 1;
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unsigned no_end_of_shader: 1;
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unsigned unk2 : 2;
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// Set to true for fragment shaders, to implement this bit of spec text
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// from section 7.1.5 of the GLSL ES spec:
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//
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// "Stores to image and buffer variables performed by helper invocations
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// have no effect on the underlying image or buffer memory."
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//
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// Helper invocations are threads (invocations) corresponding to pixels in
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// a quad that aren't actually part of the triangle, but are included to
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// make derivatives work correctly. They're usually turned on, but they
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// need to be masked off for GLSL-level stores. This bit seems to be the
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// only bit that's actually different between fragment shaders and other
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// shaders, so this is probably what it's doing.
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unsigned elide_writes : 1;
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// If backToBack is off:
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// - true for conditional branches and fallthrough
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// - false for unconditional branches
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// The blob seems to always set it to true if back-to-back is on.
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unsigned branch_cond : 1;
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// This bit is set when the next clause writes to the data register of some
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// previous clause.
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unsigned datareg_writebarrier: 1;
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unsigned datareg : 6;
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unsigned scoreboard_deps: 8;
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unsigned scoreboard_index: 3;
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unsigned clause_type: 4;
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unsigned unk3 : 1; // part of clauseType?
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unsigned next_clause_type: 4;
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unsigned unk4 : 1; // part of nextClauseType?
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};
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struct bifrost_fma_inst {
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unsigned src0 : 3;
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unsigned op : 20;
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};
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struct bifrost_add_inst {
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unsigned src0 : 3;
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unsigned op : 17;
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};
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2020-03-01 16:40:21 +00:00
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enum bifrost_csel_cond {
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BIFROST_FEQ_F = 0x0,
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BIFROST_FGT_F = 0x1,
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BIFROST_FGE_F = 0x2,
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BIFROST_IEQ_F = 0x3,
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BIFROST_IGT_I = 0x4,
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BIFROST_IGE_I = 0x5,
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BIFROST_UGT_I = 0x6,
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BIFROST_UGE_I = 0x7
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};
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struct bifrost_csel4 {
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unsigned src0 : 3;
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unsigned src1 : 3;
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unsigned src2 : 3;
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unsigned src3 : 3;
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enum bifrost_csel_cond cond : 3;
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unsigned op : 8;
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};
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2020-03-02 12:35:49 +00:00
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struct bifrost_shift_fma {
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unsigned src0 : 3;
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unsigned src1 : 3;
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unsigned src2 : 3;
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2020-03-02 12:38:38 +00:00
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unsigned half : 3; /* 000 for i32, 100 for i8, 111 for v2i16 */
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2020-03-02 12:35:49 +00:00
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unsigned unk : 1; /* always set? */
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unsigned invert_1 : 1; /* Inverts sources to combining op */
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/* For XOR, switches RSHIFT to LSHIFT since only one invert needed */
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unsigned invert_2 : 1;
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unsigned op : 8;
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};
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2020-03-01 16:40:21 +00:00
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2020-03-02 21:05:48 +00:00
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struct bifrost_shift_add {
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unsigned src0 : 3;
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unsigned src1 : 3;
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unsigned src2 : 3;
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unsigned zero : 2;
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unsigned invert_1 : 1;
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unsigned invert_2 : 1;
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unsigned op : 7;
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};
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2019-04-22 04:41:09 +01:00
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#endif
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