/* Author(s): * Alyssa Rosenzweig * * Copyright (c) 2018 Alyssa Rosenzweig (alyssa@rosenzweig.io) * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ /* Some constants and macros not found in the disassembler */ #define OP_IS_STORE(op) (\ op == midgard_op_store_vary_16 || \ op == midgard_op_store_vary_32 \ ) /* ALU control words are single bit fields with a lot of space */ #define ALU_ENAB_VEC_MUL (1 << 17) #define ALU_ENAB_SCAL_ADD (1 << 19) #define ALU_ENAB_VEC_ADD (1 << 21) #define ALU_ENAB_SCAL_MUL (1 << 23) #define ALU_ENAB_VEC_LUT (1 << 25) #define ALU_ENAB_BR_COMPACT (1 << 26) #define ALU_ENAB_BRANCH (1 << 27) /* Other opcode properties that don't conflict with the ALU_ENABs, non-ISA */ /* Denotes an opcode that takes a vector input with a fixed-number of * channels, but outputs to only a single output channel, like dot products. * For these, to determine the effective mask, this quirk can be set. We have * an intentional off-by-one (a la MALI_POSITIVE), since 0-channel makes no * sense but we need to fit 4 channels in 2-bits. Similarly, 1-channel doesn't * make sense (since then why are we quirked?), so that corresponds to "no * count set" */ #define OP_CHANNEL_COUNT(c) ((c - 1) << 0) #define GET_CHANNEL_COUNT(c) ((c & (0x3 << 0)) ? ((c & (0x3 << 0)) + 1) : 0) /* For instructions that take a single argument, normally the first argument * slot is used for the argument and the second slot is a dummy #0 constant. * However, there are exceptions: instructions like fmov store their argument * in the _second_ slot and store a dummy r24 in the first slot, designated by * QUIRK_FLIPPED_R24 */ #define QUIRK_FLIPPED_R24 (1 << 2) /* Vector-independant shorthands for the above; these numbers are arbitrary and * not from the ISA. Convert to the above with unit_enum_to_midgard */ #define UNIT_MUL 0 #define UNIT_ADD 1 #define UNIT_LUT 2 /* 4-bit type tags */ #define TAG_TEXTURE_4 0x3 #define TAG_LOAD_STORE_4 0x5 #define TAG_ALU_4 0x8 #define TAG_ALU_8 0x9 #define TAG_ALU_12 0xA #define TAG_ALU_16 0xB /* Special register aliases */ #define MAX_WORK_REGISTERS 16 /* Uniforms are begin at (REGISTER_UNIFORMS - uniform_count) */ #define REGISTER_UNIFORMS 24 #define REGISTER_UNUSED 24 #define REGISTER_CONSTANT 26 #define REGISTER_VARYING_BASE 26 #define REGISTER_OFFSET 27 #define REGISTER_TEXTURE_BASE 28 #define REGISTER_SELECT 31 /* Special uniforms used for e.g. vertex epilogues */ #define SPECIAL_UNIFORM_BASE (1 << 24) #define UNIFORM_VIEWPORT (SPECIAL_UNIFORM_BASE + 0) /* SSA helper aliases to mimic the registers. UNUSED_0 encoded as an inline * constant. UNUSED_1 encoded as REGISTER_UNUSED */ #define SSA_UNUSED_0 0 #define SSA_UNUSED_1 -2 #define SSA_FIXED_SHIFT 24 #define SSA_FIXED_REGISTER(reg) ((1 + reg) << SSA_FIXED_SHIFT) #define SSA_REG_FROM_FIXED(reg) ((reg >> SSA_FIXED_SHIFT) - 1) #define SSA_FIXED_MINIMUM SSA_FIXED_REGISTER(0) /* Swizzle support */ #define SWIZZLE(A, B, C, D) ((D << 6) | (C << 4) | (B << 2) | (A << 0)) #define SWIZZLE_FROM_ARRAY(r) SWIZZLE(r[0], r[1], r[2], r[3]) #define COMPONENT_X 0x0 #define COMPONENT_Y 0x1 #define COMPONENT_Z 0x2 #define COMPONENT_W 0x3 /* See ISA notes */ #define LDST_NOP (3) /* Is this opcode that of an integer? */ static bool midgard_is_integer_op(int op) { switch (op) { case midgard_alu_op_iadd: case midgard_alu_op_ishladd: case midgard_alu_op_isub: case midgard_alu_op_imul: case midgard_alu_op_imin: case midgard_alu_op_imax: case midgard_alu_op_iasr: case midgard_alu_op_ilsr: case midgard_alu_op_ishl: case midgard_alu_op_iand: case midgard_alu_op_ior: case midgard_alu_op_inot: case midgard_alu_op_iandnot: case midgard_alu_op_ixor: case midgard_alu_op_imov: //case midgard_alu_op_f2i: //case midgard_alu_op_f2u: case midgard_alu_op_ieq: case midgard_alu_op_iabs: case midgard_alu_op_ine: case midgard_alu_op_ilt: case midgard_alu_op_ile: case midgard_alu_op_iball_eq: case midgard_alu_op_ibany_neq: //case midgard_alu_op_i2f: //case midgard_alu_op_u2f: case midgard_alu_op_icsel: return true; default: return false; } } /* Is this unit a branch? */ static bool midgard_is_branch_unit(unsigned unit) { return (unit == ALU_ENAB_BRANCH) || (unit == ALU_ENAB_BR_COMPACT); } /* There are five ALU units: VMUL, VADD, SMUL, SADD, LUT. A given opcode is * implemented on some subset of these units (or occassionally all of them). * This table encodes a bit mask of valid units for each opcode, so the * scheduler can figure where to plonk the instruction. */ /* Shorthands for each unit */ #define UNIT_VMUL ALU_ENAB_VEC_MUL #define UNIT_SADD ALU_ENAB_SCAL_ADD #define UNIT_VADD ALU_ENAB_VEC_ADD #define UNIT_SMUL ALU_ENAB_SCAL_MUL #define UNIT_VLUT ALU_ENAB_VEC_LUT /* Shorthands for usual combinations of units */ #define UNITS_MUL (UNIT_VMUL | UNIT_SMUL) #define UNITS_ADD (UNIT_VADD | UNIT_SADD) #define UNITS_MOST (UNITS_MUL | UNITS_ADD) #define UNITS_ALL (UNITS_MOST | UNIT_VLUT) #define UNITS_SCALAR (UNIT_SADD | UNIT_SMUL) #define UNITS_VECTOR (UNIT_VMUL | UNIT_VADD) #define UNITS_ANY_VECTOR (UNITS_VECTOR | UNIT_VLUT) static unsigned alu_opcode_props[256] = { [midgard_alu_op_fadd] = UNITS_ADD, [midgard_alu_op_fmul] = UNITS_MUL | UNIT_VLUT, [midgard_alu_op_fmin] = UNITS_MUL | UNITS_ADD, [midgard_alu_op_fmax] = UNITS_MUL | UNITS_ADD, [midgard_alu_op_imin] = UNITS_MOST, [midgard_alu_op_imax] = UNITS_MOST, [midgard_alu_op_fmov] = UNITS_ALL | QUIRK_FLIPPED_R24, [midgard_alu_op_fround] = UNITS_ADD, [midgard_alu_op_froundeven] = UNITS_ADD, [midgard_alu_op_ftrunc] = UNITS_ADD, [midgard_alu_op_ffloor] = UNITS_ADD, [midgard_alu_op_fceil] = UNITS_ADD, [midgard_alu_op_ffma] = UNIT_VLUT, /* Though they output a scalar, they need to run on a vector unit * since they process vectors */ [midgard_alu_op_fdot3] = UNIT_VMUL | OP_CHANNEL_COUNT(3), [midgard_alu_op_fdot4] = UNIT_VMUL | OP_CHANNEL_COUNT(4), /* Incredibly, iadd can run on vmul, etc */ [midgard_alu_op_iadd] = UNITS_MOST, [midgard_alu_op_iabs] = UNITS_MOST, [midgard_alu_op_isub] = UNITS_MOST, [midgard_alu_op_imul] = UNITS_MOST, [midgard_alu_op_imov] = UNITS_MOST | QUIRK_FLIPPED_R24, /* For vector comparisons, use ball etc */ [midgard_alu_op_feq] = UNITS_MOST, [midgard_alu_op_fne] = UNITS_MOST, [midgard_alu_op_fle] = UNITS_MOST, [midgard_alu_op_flt] = UNITS_MOST, [midgard_alu_op_ieq] = UNITS_MOST, [midgard_alu_op_ine] = UNITS_MOST, [midgard_alu_op_ilt] = UNITS_MOST, [midgard_alu_op_ile] = UNITS_MOST, [midgard_alu_op_ule] = UNITS_MOST, [midgard_alu_op_ult] = UNITS_MOST, [midgard_alu_op_icsel] = UNITS_ADD, [midgard_alu_op_fcsel_i] = UNITS_ADD, [midgard_alu_op_fcsel] = UNITS_ADD | UNIT_SMUL, [midgard_alu_op_frcp] = UNIT_VLUT, [midgard_alu_op_frsqrt] = UNIT_VLUT, [midgard_alu_op_fsqrt] = UNIT_VLUT, [midgard_alu_op_fpow] = UNIT_VLUT, [midgard_alu_op_fexp2] = UNIT_VLUT, [midgard_alu_op_flog2] = UNIT_VLUT, [midgard_alu_op_f2i] = UNITS_ADD, [midgard_alu_op_f2u] = UNITS_ADD, [midgard_alu_op_f2u8] = UNITS_ADD, [midgard_alu_op_i2f] = UNITS_ADD, [midgard_alu_op_u2f] = UNITS_ADD, [midgard_alu_op_fsin] = UNIT_VLUT, [midgard_alu_op_fcos] = UNIT_VLUT, [midgard_alu_op_iand] = UNITS_ADD, /* XXX: Test case where it's right on smul but not sadd */ [midgard_alu_op_ior] = UNITS_ADD, [midgard_alu_op_ixor] = UNITS_ADD, [midgard_alu_op_inot] = UNITS_MOST, [midgard_alu_op_ishl] = UNITS_ADD, [midgard_alu_op_iasr] = UNITS_ADD, [midgard_alu_op_ilsr] = UNITS_ADD, [midgard_alu_op_ilsr] = UNITS_ADD, [midgard_alu_op_fball_eq] = UNITS_VECTOR, [midgard_alu_op_fbany_neq] = UNITS_VECTOR, [midgard_alu_op_iball_eq] = UNITS_VECTOR, [midgard_alu_op_ibany_neq] = UNITS_VECTOR };