/* Copyright (c) 2018-2019 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. */ #ifndef __MDG_HELPERS_H #define __MDG_HELPERS_H #include "util/macros.h" #include #define OP_IS_LOAD_VARY_F(op) (\ op == midgard_op_ld_vary_16 || \ op == midgard_op_ld_vary_32 \ ) #define OP_IS_STORE_VARY(op) (\ op == midgard_op_st_vary_16 || \ op == midgard_op_st_vary_32 || \ op == midgard_op_st_vary_32u || \ op == midgard_op_st_vary_32i \ ) #define OP_IS_STORE_R26(op) (\ OP_IS_STORE_VARY(op) || \ op == midgard_op_st_char || \ op == midgard_op_st_char2 || \ op == midgard_op_st_char4 || \ op == midgard_op_st_short4 || \ op == midgard_op_st_int4 \ ) #define OP_IS_STORE(op) (\ OP_IS_STORE_R26(op) \ ) #define OP_IS_PROJECTION(op) ( \ op == midgard_op_ldst_perspective_division_z || \ op == midgard_op_ldst_perspective_division_w \ ) #define OP_IS_VEC4_ONLY(op) ( \ OP_IS_PROJECTION(op) || \ op == midgard_op_ld_cubemap_coords \ ) #define OP_IS_MOVE(op) ( \ op == midgard_alu_op_fmov || \ op == midgard_alu_op_imov \ ) #define OP_IS_UBO_READ(op) ( \ op == midgard_op_ld_ubo_char || \ op == midgard_op_ld_ubo_char2 || \ op == midgard_op_ld_ubo_char4 || \ op == midgard_op_ld_ubo_short4 || \ op == midgard_op_ld_ubo_int4 \ ) #define OP_IS_CSEL(op) ( \ op == midgard_alu_op_icsel || \ op == midgard_alu_op_icsel_v || \ op == midgard_alu_op_fcsel_v || \ op == midgard_alu_op_fcsel \ ) #define OP_IS_DERIVATIVE(op) ( \ op == TEXTURE_OP_DFDX || \ op == TEXTURE_OP_DFDY \ ) /* 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) /* Is the op commutative? */ #define OP_COMMUTES (1 << 3) /* Does the op convert types between int- and float- space (i2f/f2u/etc) */ #define OP_TYPE_CONVERT (1 << 4) /* 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_VTX 0x2 #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 static inline int quadword_size(int tag) { switch (tag) { case TAG_ALU_4: case TAG_LOAD_STORE_4: case TAG_TEXTURE_4: case TAG_TEXTURE_4_VTX: return 1; case TAG_ALU_8: return 2; case TAG_ALU_12: return 3; case TAG_ALU_16: return 4; default: unreachable("Unknown tag"); } } #define IS_ALU(tag) (tag == TAG_ALU_4 || tag == TAG_ALU_8 || \ tag == TAG_ALU_12 || tag == TAG_ALU_16) /* 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_LDST_BASE 26 #define REGISTER_TEXTURE_BASE 28 #define REGISTER_SELECT 31 /* 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) | 1) #define SSA_REG_FROM_FIXED(reg) ((((reg) & ~1) >> 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 #define SWIZZLE_XXXX SWIZZLE(COMPONENT_X, COMPONENT_X, COMPONENT_X, COMPONENT_X) #define SWIZZLE_XYXX SWIZZLE(COMPONENT_X, COMPONENT_Y, COMPONENT_X, COMPONENT_X) #define SWIZZLE_XYZX SWIZZLE(COMPONENT_X, COMPONENT_Y, COMPONENT_Z, COMPONENT_X) #define SWIZZLE_XYZW SWIZZLE(COMPONENT_X, COMPONENT_Y, COMPONENT_Z, COMPONENT_W) #define SWIZZLE_XYXZ SWIZZLE(COMPONENT_X, COMPONENT_Y, COMPONENT_X, COMPONENT_Z) #define SWIZZLE_XYZZ SWIZZLE(COMPONENT_X, COMPONENT_Y, COMPONENT_Z, COMPONENT_Z) #define SWIZZLE_XXXY SWIZZLE(COMPONENT_X, COMPONENT_X, COMPONENT_X, COMPONENT_Y) #define SWIZZLE_ZZZW SWIZZLE(COMPONENT_Z, COMPONENT_Z, COMPONENT_Z, COMPONENT_W) #define SWIZZLE_ZWWW SWIZZLE(COMPONENT_Z, COMPONENT_W, COMPONENT_W, COMPONENT_W) #define SWIZZLE_WWWW SWIZZLE(COMPONENT_W, COMPONENT_W, COMPONENT_W, COMPONENT_W) static inline unsigned swizzle_of(unsigned comp) { switch (comp) { case 1: return SWIZZLE_XXXX; case 2: return SWIZZLE_XYXX; case 3: return SWIZZLE_XYZX; case 4: return SWIZZLE_XYZW; default: unreachable("Invalid component count"); } } static inline unsigned mask_of(unsigned nr_comp) { return (1 << nr_comp) - 1; } /* See ISA notes */ #define LDST_NOP (3) /* 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) struct mir_op_props { const char *name; unsigned props; }; /* This file is common, so don't define the tables themselves. #include * midgard_op.h if you need that, or edit midgard_ops.c directly */ /* Duplicate bits to convert a 4-bit writemask to duplicated 8-bit format, * which is used for 32-bit vector units */ static inline unsigned expand_writemask_32(unsigned mask) { unsigned o = 0; for (int i = 0; i < 4; ++i) if (mask & (1 << i)) o |= (3 << (2 * i)); return o; } /* Coerce structs to integer */ static inline unsigned vector_alu_srco_unsigned(midgard_vector_alu_src src) { unsigned u; memcpy(&u, &src, sizeof(src)); return u; } static inline midgard_vector_alu_src vector_alu_from_unsigned(unsigned u) { midgard_vector_alu_src s; memcpy(&s, &u, sizeof(s)); return s; } /* Composes two swizzles */ static inline unsigned pan_compose_swizzle(unsigned left, unsigned right) { unsigned out = 0; for (unsigned c = 0; c < 4; ++c) { unsigned s = (left >> (2*c)) & 0x3; unsigned q = (right >> (2*s)) & 0x3; out |= (q << (2*c)); } return out; } /* Applies a swizzle to an ALU source */ static inline unsigned vector_alu_apply_swizzle(unsigned src, unsigned swizzle) { midgard_vector_alu_src s = vector_alu_from_unsigned(src); s.swizzle = pan_compose_swizzle(s.swizzle, swizzle); return vector_alu_srco_unsigned(s); } /* Checks for an xyzw.. swizzle, given a mask */ static inline bool mir_is_simple_swizzle(unsigned swizzle, unsigned mask) { for (unsigned i = 0; i < 16; ++i) { if (!(mask & (1 << i))) continue; if (((swizzle >> (2 * i)) & 0x3) != i) return false; } return true; } /* Packs a load/store argument */ static inline uint8_t midgard_ldst_reg(unsigned reg, unsigned component) { assert((reg == REGISTER_LDST_BASE) || (reg == REGISTER_LDST_BASE + 1)); midgard_ldst_register_select sel = { .component = component, .select = reg - 26 }; uint8_t packed; memcpy(&packed, &sel, sizeof(packed)); return packed; } /* Unpacks a load/store argument */ static inline midgard_ldst_register_select midgard_ldst_select(uint8_t u) { midgard_ldst_register_select sel; memcpy(&sel, &u, sizeof(u)); return sel; } static inline uint8_t midgard_ldst_pack(midgard_ldst_register_select sel) { uint8_t packed; memcpy(&packed, &sel, sizeof(packed)); return packed; } /* Gets a swizzle like yyyy and returns y */ static inline unsigned swizzle_to_component(unsigned swizzle) { unsigned c = swizzle & 3; assert(((swizzle >> 2) & 3) == c); assert(((swizzle >> 4) & 3) == c); assert(((swizzle >> 6) & 3) == c); return c; } static inline unsigned component_to_swizzle(unsigned c) { return SWIZZLE(c, c, c, c); } #endif