| /* |
| * Copyright (C) 2019 Connor Abbott <cwabbott0@gmail.com> |
| * Copyright (C) 2019 Lyude Paul <thatslyude@gmail.com> |
| * Copyright (C) 2019 Ryan Houdek <Sonicadvance1@gmail.com> |
| * |
| * 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 (including the next |
| * paragraph) 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 __bifrost_h__ |
| #define __bifrost_h__ |
| |
| #include <stdint.h> |
| #include <stdbool.h> |
| #include <string.h> |
| #include <assert.h> |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| #define BIFROST_DBG_MSGS 0x0001 |
| #define BIFROST_DBG_SHADERS 0x0002 |
| #define BIFROST_DBG_SHADERDB 0x0004 |
| #define BIFROST_DBG_VERBOSE 0x0008 |
| #define BIFROST_DBG_INTERNAL 0x0010 |
| #define BIFROST_DBG_NOSCHED 0x0020 |
| #define BIFROST_DBG_INORDER 0x0040 |
| #define BIFROST_DBG_NOVALIDATE 0x0080 |
| #define BIFROST_DBG_NOOPT 0x0100 |
| #define BIFROST_DBG_NOIDVS 0x0200 |
| #define BIFROST_DBG_NOSB 0x0400 |
| #define BIFROST_DBG_NOPRELOAD 0x0800 |
| #define BIFROST_DBG_SPILL 0x1000 |
| #define BIFROST_DBG_NOPSCHED 0x2000 |
| |
| extern int bifrost_debug; |
| |
| enum bifrost_message_type { |
| BIFROST_MESSAGE_NONE = 0, |
| BIFROST_MESSAGE_VARYING = 1, |
| BIFROST_MESSAGE_ATTRIBUTE = 2, |
| BIFROST_MESSAGE_TEX = 3, |
| BIFROST_MESSAGE_VARTEX = 4, |
| BIFROST_MESSAGE_LOAD = 5, |
| BIFROST_MESSAGE_STORE = 6, |
| BIFROST_MESSAGE_ATOMIC = 7, |
| BIFROST_MESSAGE_BARRIER = 8, |
| BIFROST_MESSAGE_BLEND = 9, |
| BIFROST_MESSAGE_TILE = 10, |
| /* type 11 reserved */ |
| BIFROST_MESSAGE_Z_STENCIL = 12, |
| BIFROST_MESSAGE_ATEST = 13, |
| BIFROST_MESSAGE_JOB = 14, |
| BIFROST_MESSAGE_64BIT = 15 |
| }; |
| |
| enum bifrost_ftz { |
| BIFROST_FTZ_DISABLE = 0, |
| BIFROST_FTZ_DX11 = 1, |
| BIFROST_FTZ_ALWAYS = 2, |
| BIFROST_FTZ_ABRUPT = 3 |
| }; |
| |
| enum bifrost_exceptions { |
| BIFROST_EXCEPTIONS_ENABLED = 0, |
| BIFROST_EXCEPTIONS_DISABLED = 1, |
| BIFROST_EXCEPTIONS_PRECISE_DIVISION = 2, |
| BIFROST_EXCEPTIONS_PRECISE_SQRT = 3, |
| }; |
| |
| /* Describes clause flow control, with respect to control flow and branch |
| * reconvergence. |
| * |
| * Control flow may be considered back-to-back (execute clauses back-to-back), |
| * non-back-to-back (switch warps after clause before the next clause), write |
| * elision (back-to-back and elide register slot #3 write from the clause), or |
| * end of shader. |
| * |
| * Branch reconvergence may be disabled, enabled unconditionally, or enabled |
| * based on the program counter. A clause requires reconvergence if it has a |
| * successor that can be executed without first executing the clause itself. |
| * Separate iterations of a loop are treated separately here, so it is also the |
| * case for a loop exit where the iteration count is not warp-invariant. |
| * |
| */ |
| |
| enum bifrost_flow { |
| /* End-of-shader */ |
| BIFROST_FLOW_END = 0, |
| |
| /* Non back-to-back, PC-encoded reconvergence */ |
| BIFROST_FLOW_NBTB_PC = 1, |
| |
| /* Non back-to-back, unconditional reconvergence */ |
| BIFROST_FLOW_NBTB_UNCONDITIONAL = 2, |
| |
| /* Non back-to-back, no reconvergence */ |
| BIFROST_FLOW_NBTB = 3, |
| |
| /* Back-to-back, unconditional reconvergence */ |
| BIFROST_FLOW_BTB_UNCONDITIONAL = 4, |
| |
| /* Back-to-back, no reconvergence */ |
| BIFROST_FLOW_BTB_NONE = 5, |
| |
| /* Write elision, unconditional reconvergence */ |
| BIFROST_FLOW_WE_UNCONDITIONAL = 6, |
| |
| /* Write elision, no reconvergence */ |
| BIFROST_FLOW_WE = 7, |
| }; |
| |
| enum bifrost_slot { |
| /* 0-5 are general purpose */ |
| BIFROST_SLOT_ELDEST_DEPTH = 6, |
| BIFROST_SLOT_ELDEST_COLOUR = 7, |
| }; |
| |
| struct bifrost_header { |
| /* Reserved */ |
| unsigned zero1 : 5; |
| |
| /* Flush-to-zero mode, leave zero for GL */ |
| enum bifrost_ftz flush_to_zero : 2; |
| |
| /* Convert any infinite result of any floating-point operation to the |
| * biggest representable number */ |
| unsigned suppress_inf: 1; |
| |
| /* Convert NaN to +0.0 */ |
| unsigned suppress_nan : 1; |
| |
| /* Floating-point excception handling mode */ |
| enum bifrost_exceptions float_exceptions : 2; |
| |
| /* Enum describing the flow control, which matters for handling |
| * divergence and reconvergence efficiently */ |
| enum bifrost_flow flow_control : 3; |
| |
| /* Reserved */ |
| unsigned zero2 : 1; |
| |
| /* Terminate discarded threads, rather than continuing execution. Set |
| * for fragment shaders for standard GL behaviour of DISCARD. Also in a |
| * fragment shader, this disables helper invocations, so cannot be used |
| * in a shader that requires derivatives or texture LOD computation */ |
| unsigned terminate_discarded_threads : 1; |
| |
| /* If set, the hardware may prefetch the next clause. If false, the |
| * hardware may not. Clear for unconditional branches. */ |
| unsigned next_clause_prefetch : 1; |
| |
| /* If set, a barrier will be inserted after the clause waiting for all |
| * message passing instructions to read their staging registers, such |
| * that it is safe for the next clause to write them. */ |
| unsigned staging_barrier: 1; |
| unsigned staging_register : 6; |
| |
| /* Slots to wait on and slot to be used for message passing |
| * instructions respectively */ |
| unsigned dependency_wait : 8; |
| unsigned dependency_slot : 3; |
| |
| enum bifrost_message_type message_type : 5; |
| enum bifrost_message_type next_message_type : 5; |
| } __attribute__((packed)); |
| |
| enum bifrost_packed_src { |
| BIFROST_SRC_PORT0 = 0, |
| BIFROST_SRC_PORT1 = 1, |
| BIFROST_SRC_PORT2 = 2, |
| BIFROST_SRC_STAGE = 3, |
| BIFROST_SRC_FAU_LO = 4, |
| BIFROST_SRC_FAU_HI = 5, |
| BIFROST_SRC_PASS_FMA = 6, |
| BIFROST_SRC_PASS_ADD = 7, |
| }; |
| |
| struct bifrost_fma_inst { |
| unsigned src0 : 3; |
| unsigned op : 20; |
| } __attribute__((packed)); |
| |
| struct bifrost_add_inst { |
| unsigned src0 : 3; |
| unsigned op : 17; |
| } __attribute__((packed)); |
| |
| enum branch_bit_size { |
| BR_SIZE_32 = 0, |
| BR_SIZE_16XX = 1, |
| BR_SIZE_16YY = 2, |
| // For the above combinations of bitsize and location, an extra bit is |
| // encoded via comparing the sources. The only possible source of ambiguity |
| // would be if the sources were the same, but then the branch condition |
| // would be always true or always false anyways, so we can ignore it. But |
| // this no longer works when comparing the y component to the x component, |
| // since it's valid to compare the y component of a source against its own |
| // x component. Instead, the extra bit is encoded via an extra bitsize. |
| BR_SIZE_16YX0 = 3, |
| BR_SIZE_16YX1 = 4, |
| BR_SIZE_32_AND_16X = 5, |
| BR_SIZE_32_AND_16Y = 6, |
| // Used for comparisons with zero and always-true, see below. I think this |
| // only works for integer comparisons. |
| BR_SIZE_ZERO = 7, |
| }; |
| |
| struct bifrost_regs { |
| unsigned fau_idx : 8; |
| unsigned reg3 : 6; |
| unsigned reg2 : 6; |
| unsigned reg0 : 5; |
| unsigned reg1 : 6; |
| unsigned ctrl : 4; |
| } __attribute__((packed)); |
| |
| #define BIFROST_FMTC_CONSTANTS 0b0011 |
| #define BIFROST_FMTC_FINAL 0b0111 |
| |
| struct bifrost_fmt_constant { |
| unsigned pos : 4; |
| unsigned tag : 4; |
| uint64_t imm_1 : 60; |
| uint64_t imm_2 : 60; |
| } __attribute__((packed)); |
| |
| /* Clause formats, encoded in a table */ |
| |
| enum bi_clause_subword { |
| /* Literal 3-bit values */ |
| BI_CLAUSE_SUBWORD_LITERAL_0 = 0, |
| /* etc */ |
| BI_CLAUSE_SUBWORD_LITERAL_7 = 7, |
| |
| /* The value of the corresponding tuple in the corresponding bits */ |
| BI_CLAUSE_SUBWORD_TUPLE_0 = 8, |
| /* etc */ |
| BI_CLAUSE_SUBWORD_TUPLE_7 = 15, |
| |
| /* Clause header */ |
| BI_CLAUSE_SUBWORD_HEADER = 16, |
| |
| /* Leave zero, but semantically distinct from literal 0 */ |
| BI_CLAUSE_SUBWORD_RESERVED = 17, |
| |
| /* Embedded constant 0 */ |
| BI_CLAUSE_SUBWORD_CONSTANT = 18, |
| |
| /* M bits controlling modifier for the constant */ |
| BI_CLAUSE_SUBWORD_M = 19, |
| |
| /* Z bit: 1 to begin encoding constants, 0 to terminate the clause */ |
| BI_CLAUSE_SUBWORD_Z = 20, |
| |
| /* Upper 3-bits of a given tuple and zero extended */ |
| BI_CLAUSE_SUBWORD_UPPER_0 = 32, |
| /* etc */ |
| BI_CLAUSE_SUBWORD_UPPER_7 = BI_CLAUSE_SUBWORD_UPPER_0 + 7, |
| |
| /* Upper 3-bits of two tuples, concatenated and zero-extended */ |
| BI_CLAUSE_SUBWORD_UPPER_23 = BI_CLAUSE_SUBWORD_UPPER_0 + 23, |
| BI_CLAUSE_SUBWORD_UPPER_56 = BI_CLAUSE_SUBWORD_UPPER_0 + 56, |
| }; |
| |
| #define L(x) ((enum bi_clause_subword)(BI_CLAUSE_SUBWORD_LITERAL_0 + x)) |
| #define U(x) ((enum bi_clause_subword)(BI_CLAUSE_SUBWORD_UPPER_0 + x)) |
| #define T(x) ((enum bi_clause_subword)(BI_CLAUSE_SUBWORD_TUPLE_0 + x)) |
| #define EC BI_CLAUSE_SUBWORD_CONSTANT |
| #define M BI_CLAUSE_SUBWORD_M |
| #define Z BI_CLAUSE_SUBWORD_Z |
| #define H BI_CLAUSE_SUBWORD_HEADER |
| #define R BI_CLAUSE_SUBWORD_RESERVED |
| |
| struct bi_clause_format { |
| unsigned format; /* format number */ |
| unsigned pos; /* index in the clause */ |
| enum bi_clause_subword tag_1; /* 2-bits */ |
| enum bi_clause_subword tag_2; /* 3-bits */ |
| enum bi_clause_subword tag_3; /* 3-bits */ |
| enum bi_clause_subword s0_s3; /* 60 bits */ |
| enum bi_clause_subword s4; /* 15 bits */ |
| enum bi_clause_subword s5_s6; /* 30 bits */ |
| enum bi_clause_subword s7; /* 15 bits */ |
| }; |
| |
| static const struct bi_clause_format bi_clause_formats[] = { |
| { 0, 0, L(0), L(5), U(0), T(0), T(0), H, H }, |
| { 0, 0, Z, L(1), U(0), T(0), T(0), H, H }, |
| { 1, 1, Z, L(0), L(3), T(1), T(1), R, U(1) }, |
| { 2, 1, L(0), L(4), U(1), T(1), T(1), T(2), T(2) }, |
| { 3, 2, Z, L(0), L(4), EC, M, T(2), U(2) }, |
| { 4, 2, L(0), L(0), L(1), T(3), T(3), T(2), U(23) }, |
| { 4, 2, Z, L(0), L(5), T(3), T(3), T(2), U(23) }, |
| { 5, 2, L(2), U(3), U(2), T(3), T(3), T(2), EC }, |
| { 6, 3, Z, L(2), U(4), T(4), T(4), EC, EC }, |
| { 7, 3, L(1), L(4), U(4), T(4), T(4), T(5), T(5) }, |
| { 8, 4, Z, L(0), L(6), EC, M, T(5), U(5) }, |
| { 9, 4, Z, L(0), L(7), T(6), T(6), T(5), U(56) }, |
| { 10, 4, L(3), U(6), U(5), T(6), T(6), T(5), EC }, |
| { 11, 5, Z, L(3), U(7), T(7), T(7), EC, EC }, |
| }; |
| |
| #undef L |
| #undef U |
| #undef T |
| #undef EC |
| #undef M |
| #undef Z |
| #undef H |
| #undef R |
| |
| /* 32-bit modes for slots 2/3, as encoded in the register block. Other values |
| * are reserved. First part specifies behaviour of slot 2 (Idle, Read, Write |
| * Full, Write Low, Write High), second part behaviour of slot 3, and the last |
| * part specifies the source for the write (FMA, ADD, or MIX for FMA/ADD). |
| * |
| * IDLE is a special mode disabling both slots, except for the first |
| * instruction in the clause which uses IDLE_1 for the same purpose. |
| * |
| * All fields 0 used as sentinel for reserved encoding, so IDLE(_1) have FMA |
| * set (and ignored) as a placeholder to differentiate from reserved. |
| */ |
| enum bifrost_reg_mode { |
| BIFROST_R_WL_FMA = 1, |
| BIFROST_R_WH_FMA = 2, |
| BIFROST_R_W_FMA = 3, |
| BIFROST_R_WL_ADD = 4, |
| BIFROST_R_WH_ADD = 5, |
| BIFROST_R_W_ADD = 6, |
| BIFROST_WL_WL_ADD = 7, |
| BIFROST_WL_WH_ADD = 8, |
| BIFROST_WL_W_ADD = 9, |
| BIFROST_WH_WL_ADD = 10, |
| BIFROST_WH_WH_ADD = 11, |
| BIFROST_WH_W_ADD = 12, |
| BIFROST_W_WL_ADD = 13, |
| BIFROST_W_WH_ADD = 14, |
| BIFROST_W_W_ADD = 15, |
| BIFROST_IDLE_1 = 16, |
| BIFROST_I_W_FMA = 17, |
| BIFROST_I_WL_FMA = 18, |
| BIFROST_I_WH_FMA = 19, |
| BIFROST_R_I = 20, |
| BIFROST_I_W_ADD = 21, |
| BIFROST_I_WL_ADD = 22, |
| BIFROST_I_WH_ADD = 23, |
| BIFROST_WL_WH_MIX = 24, |
| BIFROST_WH_WL_MIX = 26, |
| BIFROST_IDLE = 27, |
| }; |
| |
| enum bifrost_reg_op { |
| BIFROST_OP_IDLE = 0, |
| BIFROST_OP_READ = 1, |
| BIFROST_OP_WRITE = 2, |
| BIFROST_OP_WRITE_LO = 3, |
| BIFROST_OP_WRITE_HI = 4, |
| }; |
| |
| struct bifrost_reg_ctrl_23 { |
| enum bifrost_reg_op slot2; |
| enum bifrost_reg_op slot3; |
| bool slot3_fma; |
| }; |
| |
| #ifndef __cplusplus |
| static const struct bifrost_reg_ctrl_23 bifrost_reg_ctrl_lut[32] = { |
| [BIFROST_R_WL_FMA] = { BIFROST_OP_READ, BIFROST_OP_WRITE_LO, true }, |
| [BIFROST_R_WH_FMA] = { BIFROST_OP_READ, BIFROST_OP_WRITE_HI, true }, |
| [BIFROST_R_W_FMA] = { BIFROST_OP_READ, BIFROST_OP_WRITE, true }, |
| [BIFROST_R_WL_ADD] = { BIFROST_OP_READ, BIFROST_OP_WRITE_LO, false }, |
| [BIFROST_R_WH_ADD] = { BIFROST_OP_READ, BIFROST_OP_WRITE_HI, false }, |
| [BIFROST_R_W_ADD] = { BIFROST_OP_READ, BIFROST_OP_WRITE, false }, |
| [BIFROST_WL_WL_ADD] = { BIFROST_OP_WRITE_LO, BIFROST_OP_WRITE_LO, false }, |
| [BIFROST_WL_WH_ADD] = { BIFROST_OP_WRITE_LO, BIFROST_OP_WRITE_HI, false }, |
| [BIFROST_WL_W_ADD] = { BIFROST_OP_WRITE_LO, BIFROST_OP_WRITE, false }, |
| [BIFROST_WH_WL_ADD] = { BIFROST_OP_WRITE_HI, BIFROST_OP_WRITE_LO, false }, |
| [BIFROST_WH_WH_ADD] = { BIFROST_OP_WRITE_HI, BIFROST_OP_WRITE_HI, false }, |
| [BIFROST_WH_W_ADD] = { BIFROST_OP_WRITE_HI, BIFROST_OP_WRITE, false }, |
| [BIFROST_W_WL_ADD] = { BIFROST_OP_WRITE, BIFROST_OP_WRITE_LO, false }, |
| [BIFROST_W_WH_ADD] = { BIFROST_OP_WRITE, BIFROST_OP_WRITE_HI, false }, |
| [BIFROST_W_W_ADD] = { BIFROST_OP_WRITE, BIFROST_OP_WRITE, false }, |
| [BIFROST_IDLE_1] = { BIFROST_OP_IDLE, BIFROST_OP_IDLE, true }, |
| [BIFROST_I_W_FMA] = { BIFROST_OP_IDLE, BIFROST_OP_WRITE, true }, |
| [BIFROST_I_WL_FMA] = { BIFROST_OP_IDLE, BIFROST_OP_WRITE_LO, true }, |
| [BIFROST_I_WH_FMA] = { BIFROST_OP_IDLE, BIFROST_OP_WRITE_HI, true }, |
| [BIFROST_R_I] = { BIFROST_OP_READ, BIFROST_OP_IDLE, false }, |
| [BIFROST_I_W_ADD] = { BIFROST_OP_IDLE, BIFROST_OP_WRITE, false }, |
| [BIFROST_I_WL_ADD] = { BIFROST_OP_IDLE, BIFROST_OP_WRITE_LO, false }, |
| [BIFROST_I_WH_ADD] = { BIFROST_OP_IDLE, BIFROST_OP_WRITE_HI, false }, |
| [BIFROST_WL_WH_MIX] = { BIFROST_OP_WRITE_LO, BIFROST_OP_WRITE_HI, false }, |
| [BIFROST_WH_WL_MIX] = { BIFROST_OP_WRITE_HI, BIFROST_OP_WRITE_LO, false }, |
| [BIFROST_IDLE] = { BIFROST_OP_IDLE, BIFROST_OP_IDLE, true }, |
| }; |
| #endif |
| |
| /* Texture operator descriptors in various states. Usually packed in the |
| * compiler and stored as a constant */ |
| |
| enum bifrost_texture_operation_mode { |
| /* Dual texturing */ |
| BIFROST_TEXTURE_OPERATION_DUAL = 1, |
| |
| /* Single texturing */ |
| BIFROST_TEXTURE_OPERATION_SINGLE = 3, |
| }; |
| |
| enum bifrost_index { |
| /* Both texture/sampler index immediate */ |
| BIFROST_INDEX_IMMEDIATE_SHARED = 0, |
| |
| /* Sampler index immediate, texture index from staging */ |
| BIFROST_INDEX_IMMEDIATE_SAMPLER = 1, |
| |
| /* Texture index immediate, sampler index from staging */ |
| BIFROST_INDEX_IMMEDIATE_TEXTURE = 2, |
| |
| /* Both indices from (separate) staging registers */ |
| BIFROST_INDEX_REGISTER = 3, |
| }; |
| |
| enum bifrost_tex_op { |
| /* Given explicit derivatives, compute a gradient descriptor */ |
| BIFROST_TEX_OP_GRDESC_DER = 4, |
| |
| /* Given implicit derivatives (texture coordinates in a fragment |
| * shader), compute a gradient descriptor */ |
| BIFROST_TEX_OP_GRDESC = 5, |
| |
| /* Fetch a texel. Takes a staging register with LOD level / face index |
| * packed 16:16 */ |
| BIFROST_TEX_OP_FETCH = 6, |
| |
| /* Filtered texture */ |
| BIFROST_TEX_OP_TEX = 7, |
| }; |
| |
| enum bifrost_lod_mode { |
| /* Takes two staging registers forming a 64-bit gradient descriptor |
| * (computed by a previous GRDESC or GRDESC_DER operation) */ |
| BIFROST_LOD_MODE_GRDESC = 3, |
| |
| /* Take a staging register with 8:8 fixed-point in bottom 16-bits |
| * specifying an explicit LOD */ |
| BIFROST_LOD_MODE_EXPLICIT = 4, |
| |
| /* Takes a staging register with bottom 16-bits as 8:8 fixed-point LOD |
| * bias and top 16-bit as 8:8 fixed-point lower bound (generally left |
| * zero), added and clamped to a computed LOD */ |
| BIFROST_LOD_MODE_BIAS = 5, |
| |
| /* Set LOD to zero */ |
| BIFROST_LOD_MODE_ZERO = 6, |
| |
| /* Compute LOD */ |
| BIFROST_LOD_MODE_COMPUTE = 7, |
| }; |
| |
| enum bifrost_texture_format { |
| /* 16-bit floating point, with optional clamping */ |
| BIFROST_TEXTURE_FORMAT_F16 = 0, |
| BIFROST_TEXTURE_FORMAT_F16_POS = 1, |
| BIFROST_TEXTURE_FORMAT_F16_PM1 = 2, |
| BIFROST_TEXTURE_FORMAT_F16_1 = 3, |
| |
| /* 32-bit floating point, with optional clamping */ |
| BIFROST_TEXTURE_FORMAT_F32 = 4, |
| BIFROST_TEXTURE_FORMAT_F32_POS = 5, |
| BIFROST_TEXTURE_FORMAT_F32_PM1 = 6, |
| BIFROST_TEXTURE_FORMAT_F32_1 = 7, |
| }; |
| |
| enum bifrost_texture_format_full { |
| /* Transclude bifrost_texture_format from above */ |
| |
| /* Integers, unclamped */ |
| BIFROST_TEXTURE_FORMAT_U16 = 12, |
| BIFROST_TEXTURE_FORMAT_S16 = 13, |
| BIFROST_TEXTURE_FORMAT_U32 = 14, |
| BIFROST_TEXTURE_FORMAT_S32 = 15, |
| }; |
| |
| enum bifrost_texture_fetch { |
| /* Default texelFetch */ |
| BIFROST_TEXTURE_FETCH_TEXEL = 1, |
| |
| /* Deprecated, fetches 4x U32 of a U8 x 4 texture. Do not use. */ |
| BIFROST_TEXTURE_FETCH_GATHER4_RGBA = 3, |
| |
| /* Gathers */ |
| BIFROST_TEXTURE_FETCH_GATHER4_R = 4, |
| BIFROST_TEXTURE_FETCH_GATHER4_G = 5, |
| BIFROST_TEXTURE_FETCH_GATHER4_B = 6, |
| BIFROST_TEXTURE_FETCH_GATHER4_A = 7 |
| }; |
| |
| struct bifrost_texture_operation { |
| /* If immediate_indices is set: |
| * - immediate sampler index |
| * - index used as texture index |
| * Otherwise: |
| * - bifrost_single_index in lower 2 bits |
| * - 0x3 in upper 2 bits (single-texturing) |
| */ |
| unsigned sampler_index_or_mode : 4; |
| unsigned index : 7; |
| bool immediate_indices : 1; |
| enum bifrost_tex_op op : 3; |
| |
| /* If set for TEX/FETCH, loads texel offsets and multisample index from |
| * a staging register containing offset_x:offset_y:offset_z:ms_index |
| * packed 8:8:8:8. Offsets must be in [-31, +31]. If set for |
| * GRDESC(_DER), disable LOD bias. */ |
| bool offset_or_bias_disable : 1; |
| |
| /* If set for TEX/FETCH, loads fp32 shadow comparison value from a |
| * staging register. Implies fetch_component = gather4_r. If set for |
| * GRDESC(_DER), disables LOD clamping. */ |
| bool shadow_or_clamp_disable : 1; |
| |
| /* If set, loads an uint32 array index from a staging register. */ |
| bool array : 1; |
| |
| /* Texture dimension, or 0 for a cubemap */ |
| unsigned dimension : 2; |
| |
| /* Method to compute LOD value or for a FETCH, the |
| * bifrost_texture_fetch component specification */ |
| enum bifrost_lod_mode lod_or_fetch : 3; |
| |
| /* Reserved */ |
| unsigned zero : 1; |
| |
| /* Register format for the result */ |
| enum bifrost_texture_format_full format : 4; |
| |
| /* Write mask for the result */ |
| unsigned mask : 4; |
| } __attribute__((packed)); |
| |
| struct bifrost_dual_texture_operation { |
| unsigned primary_sampler_index : 2; |
| unsigned mode : 2; /* 0x1 for dual */ |
| unsigned primary_texture_index : 2; |
| unsigned secondary_sampler_index : 2; |
| unsigned secondary_texture_index : 2; |
| |
| /* Leave zero for dual texturing */ |
| unsigned reserved : 1; |
| unsigned index_mode_zero : 1; |
| |
| /* Base staging register to write the secondary results to */ |
| unsigned secondary_register : 6; |
| |
| /* Format/mask for each texture */ |
| enum bifrost_texture_format secondary_format : 3; |
| unsigned secondary_mask : 4; |
| |
| enum bifrost_texture_format primary_format : 3; |
| unsigned primary_mask : 4; |
| } __attribute__((packed)); |
| |
| static inline uint32_t |
| bi_dual_tex_as_u32(struct bifrost_dual_texture_operation desc) |
| { |
| uint32_t desc_u; |
| memcpy(&desc_u, &desc, sizeof(desc)); |
| |
| return desc_u; |
| } |
| |
| #define BIFROST_MEGA_SAMPLE 128 |
| #define BIFROST_ALL_SAMPLES 255 |
| #define BIFROST_CURRENT_PIXEL 255 |
| |
| struct bifrost_pixel_indices { |
| unsigned sample : 8; |
| unsigned rt : 8; |
| unsigned x : 8; |
| unsigned y : 8; |
| } __attribute__((packed)); |
| |
| enum bi_constmod { |
| BI_CONSTMOD_NONE, |
| BI_CONSTMOD_PC_LO, |
| BI_CONSTMOD_PC_HI, |
| BI_CONSTMOD_PC_LO_HI |
| }; |
| |
| struct bi_constants { |
| /* Raw constant values */ |
| uint64_t raw[6]; |
| |
| /* Associated modifier derived from M values */ |
| enum bi_constmod mods[6]; |
| }; |
| |
| /* FAU selectors for constants are out-of-order, construct the top bits |
| * here given a embedded constant index in a clause */ |
| |
| static inline unsigned |
| bi_constant_field(unsigned idx) |
| { |
| const unsigned values[] = { |
| 4, 5, 6, 7, 2, 3 |
| }; |
| |
| assert(idx <= 5); |
| return values[idx] << 4; |
| } |
| |
| #ifdef __cplusplus |
| } /* extern C */ |
| #endif |
| |
| #endif |