| /* |
| * 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> |
| |
| #define BIFROST_DBG_MSGS 0x0001 |
| #define BIFROST_DBG_SHADERS 0x0002 |
| |
| 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, |
| }; |
| |
| 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_CONST_LO = 4, |
| BIFROST_SRC_CONST_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 bifrost_outmod { |
| BIFROST_NONE = 0x0, |
| BIFROST_POS = 0x1, |
| BIFROST_SAT_SIGNED = 0x2, |
| BIFROST_SAT = 0x3, |
| }; |
| |
| enum bifrost_roundmode { |
| BIFROST_RTE = 0x0, /* round to even */ |
| BIFROST_RTP = 0x1, /* round to positive */ |
| BIFROST_RTN = 0x2, /* round to negative */ |
| BIFROST_RTZ = 0x3 /* round to zero */ |
| }; |
| |
| /* NONE: Same as fmax() and fmin() -- return the other |
| * number if any number is NaN. Also always return +0 if |
| * one argument is +0 and the other is -0. |
| * |
| * NAN_WINS: Instead of never returning a NaN, always return |
| * one. The "greater"/"lesser" NaN is always returned, first |
| * by checking the sign and then the mantissa bits. |
| * |
| * SRC1_WINS: For max, implement src0 > src1 ? src0 : src1. |
| * For min, implement src0 < src1 ? src0 : src1. This |
| * includes handling NaN's and signedness of 0 differently |
| * from above, since +0 and -0 compare equal and comparisons |
| * always return false for NaN's. As a result, this mode is |
| * *not* commutative. |
| * |
| * SRC0_WINS: For max, implement src0 < src1 ? src1 : src0 |
| * For min, implement src0 > src1 ? src1 : src0 |
| */ |
| |
| |
| enum bifrost_minmax_mode { |
| BIFROST_MINMAX_NONE = 0x0, |
| BIFROST_NAN_WINS = 0x1, |
| BIFROST_SRC1_WINS = 0x2, |
| BIFROST_SRC0_WINS = 0x3, |
| }; |
| |
| enum bifrost_interp_mode { |
| BIFROST_INTERP_PER_FRAG = 0x0, |
| BIFROST_INTERP_CENTROID = 0x1, |
| BIFROST_INTERP_DEFAULT = 0x2, |
| BIFROST_INTERP_EXPLICIT = 0x3 |
| }; |
| |
| /* Fixed location for gl_FragCoord.zw */ |
| #define BIFROST_FRAGZ (23) |
| #define BIFROST_FRAGW (22) |
| |
| 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 uniform_const : 8; |
| unsigned reg3 : 6; |
| unsigned reg2 : 6; |
| unsigned reg0 : 5; |
| unsigned reg1 : 6; |
| unsigned ctrl : 4; |
| } __attribute__((packed)); |
| |
| enum bifrost_branch_cond { |
| BR_COND_LT = 0, |
| BR_COND_LE = 1, |
| BR_COND_GE = 2, |
| BR_COND_GT = 3, |
| // Equal vs. not-equal determined by src0/src1 comparison |
| BR_COND_EQ = 4, |
| // floating-point comparisons |
| // Becomes UNE when you flip the arguments |
| BR_COND_OEQ = 5, |
| // TODO what happens when you flip the arguments? |
| BR_COND_OGT = 6, |
| BR_COND_OLT = 7, |
| }; |
| |
| enum bifrost_branch_code { |
| BR_ALWAYS = 63, |
| }; |
| |
| #define BIFROST_ADD_OP_BRANCH (0x0d000 >> 12) |
| |
| struct bifrost_branch { |
| unsigned src0 : 3; |
| |
| /* For BR_SIZE_ZERO, upper two bits become ctrl */ |
| unsigned src1 : 3; |
| |
| /* Offset source -- always uniform/const but |
| * theoretically could support indirect jumps? */ |
| unsigned src2 : 3; |
| |
| enum bifrost_branch_cond cond : 3; |
| enum branch_bit_size size : 3; |
| |
| unsigned op : 5; |
| }; |
| |
| /* Clause packing */ |
| |
| struct bifrost_fmt1 { |
| unsigned ins_0 : 3; |
| unsigned tag : 5; |
| uint64_t ins_1 : 64; |
| unsigned ins_2 : 11; |
| uint64_t header : 45; |
| } __attribute__((packed)); |
| |
| #define BIFROST_FMT1_INSTRUCTIONS 0b00101 |
| #define BIFROST_FMT1_FINAL 0b01001 |
| #define BIFROST_FMT1_CONSTANTS 0b00001 |
| |
| #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)); |
| |
| /* 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; |
| }; |
| |
| 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 }, |
| }; |
| |
| /* Texture operator descriptors in various states. Usually packed in the |
| * compiler and stored as a constant */ |
| |
| 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)); |
| |
| #endif |
