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/*
* Copyright © 2014 Intel Corporation
*
* 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.
*
* Authors:
* Connor Abbott (cwabbott0@gmail.com)
*
*/
/**
* This header file defines all the available intrinsics in one place. It
* expands to a list of macros of the form:
*
* INTRINSIC(name, num_srcs, src_components, has_dest, dest_components,
* num_variables, num_indices, flags)
*
* Which should correspond one-to-one with the nir_intrinsic_info structure. It
* is included in both ir.h to create the nir_intrinsic enum (with members of
* the form nir_intrinsic_(name)) and and in opcodes.c to create
* nir_intrinsic_infos, which is a const array of nir_intrinsic_info structures
* for each intrinsic.
*/
#define ARR(...) { __VA_ARGS__ }
INTRINSIC(load_var, 0, ARR(), true, 0, 1, 0, NIR_INTRINSIC_CAN_ELIMINATE)
INTRINSIC(store_var, 1, ARR(0), false, 0, 1, 0, 0)
INTRINSIC(copy_var, 0, ARR(), false, 0, 2, 0, 0)
/*
* Interpolation of input. The interp_var_at* intrinsics are similar to the
* load_var intrinsic acting an a shader input except that they interpolate
* the input differently. The at_sample and at_offset intrinsics take an
* aditional source that is a integer sample id or a vec2 position offset
* respectively.
*/
INTRINSIC(interp_var_at_centroid, 0, ARR(0), true, 0, 1, 0,
NIR_INTRINSIC_CAN_ELIMINATE | NIR_INTRINSIC_CAN_REORDER)
INTRINSIC(interp_var_at_sample, 1, ARR(1), true, 0, 1, 0,
NIR_INTRINSIC_CAN_ELIMINATE | NIR_INTRINSIC_CAN_REORDER)
INTRINSIC(interp_var_at_offset, 1, ARR(2), true, 0, 1, 0,
NIR_INTRINSIC_CAN_ELIMINATE | NIR_INTRINSIC_CAN_REORDER)
/*
* Ask the driver for the size of a given buffer. It takes the buffer index
* as source.
*/
INTRINSIC(get_buffer_size, 1, ARR(1), true, 1, 0, 0,
NIR_INTRINSIC_CAN_ELIMINATE | NIR_INTRINSIC_CAN_REORDER)
/*
* a barrier is an intrinsic with no inputs/outputs but which can't be moved
* around/optimized in general
*/
#define BARRIER(name) INTRINSIC(name, 0, ARR(), false, 0, 0, 0, 0)
BARRIER(barrier)
BARRIER(discard)
/*
* Memory barrier with semantics analogous to the memoryBarrier() GLSL
* intrinsic.
*/
BARRIER(memory_barrier)
/** A conditional discard, with a single boolean source. */
INTRINSIC(discard_if, 1, ARR(1), false, 0, 0, 0, 0)
/**
* Basic Geometry Shader intrinsics.
*
* emit_vertex implements GLSL's EmitStreamVertex() built-in. It takes a single
* index, which is the stream ID to write to.
*
* end_primitive implements GLSL's EndPrimitive() built-in.
*/
INTRINSIC(emit_vertex, 0, ARR(), false, 0, 0, 1, 0)
INTRINSIC(end_primitive, 0, ARR(), false, 0, 0, 1, 0)
/**
* Geometry Shader intrinsics with a vertex count.
*
* Alternatively, drivers may implement these intrinsics, and use
* nir_lower_gs_intrinsics() to convert from the basic intrinsics.
*
* These maintain a count of the number of vertices emitted, as an additional
* unsigned integer source.
*/
INTRINSIC(emit_vertex_with_counter, 1, ARR(1), false, 0, 0, 1, 0)
INTRINSIC(end_primitive_with_counter, 1, ARR(1), false, 0, 0, 1, 0)
INTRINSIC(set_vertex_count, 1, ARR(1), false, 0, 0, 0, 0)
/*
* Atomic counters
*
* The *_var variants take an atomic_uint nir_variable, while the other,
* lowered, variants take a constant buffer index and register offset.
*/
#define ATOMIC(name, flags) \
INTRINSIC(atomic_counter_##name##_var, 0, ARR(), true, 1, 1, 0, flags) \
INTRINSIC(atomic_counter_##name, 1, ARR(1), true, 1, 0, 1, flags)
ATOMIC(inc, 0)
ATOMIC(dec, 0)
ATOMIC(read, NIR_INTRINSIC_CAN_ELIMINATE)
/*
* Image load, store and atomic intrinsics.
*
* All image intrinsics take an image target passed as a nir_variable. Image
* variables contain a number of memory and layout qualifiers that influence
* the semantics of the intrinsic.
*
* All image intrinsics take a four-coordinate vector and a sample index as
* first two sources, determining the location within the image that will be
* accessed by the intrinsic. Components not applicable to the image target
* in use are undefined. Image store takes an additional four-component
* argument with the value to be written, and image atomic operations take
* either one or two additional scalar arguments with the same meaning as in
* the ARB_shader_image_load_store specification.
*/
INTRINSIC(image_load, 2, ARR(4, 1), true, 4, 1, 0,
NIR_INTRINSIC_CAN_ELIMINATE)
INTRINSIC(image_store, 3, ARR(4, 1, 4), false, 0, 1, 0, 0)
INTRINSIC(image_atomic_add, 3, ARR(4, 1, 1), true, 1, 1, 0, 0)
INTRINSIC(image_atomic_min, 3, ARR(4, 1, 1), true, 1, 1, 0, 0)
INTRINSIC(image_atomic_max, 3, ARR(4, 1, 1), true, 1, 1, 0, 0)
INTRINSIC(image_atomic_and, 3, ARR(4, 1, 1), true, 1, 1, 0, 0)
INTRINSIC(image_atomic_or, 3, ARR(4, 1, 1), true, 1, 1, 0, 0)
INTRINSIC(image_atomic_xor, 3, ARR(4, 1, 1), true, 1, 1, 0, 0)
INTRINSIC(image_atomic_exchange, 3, ARR(4, 1, 1), true, 1, 1, 0, 0)
INTRINSIC(image_atomic_comp_swap, 4, ARR(4, 1, 1, 1), true, 1, 1, 0, 0)
INTRINSIC(image_size, 0, ARR(), true, 4, 1, 0,
NIR_INTRINSIC_CAN_ELIMINATE | NIR_INTRINSIC_CAN_REORDER)
INTRINSIC(image_samples, 0, ARR(), true, 1, 1, 0,
NIR_INTRINSIC_CAN_ELIMINATE | NIR_INTRINSIC_CAN_REORDER)
/*
* SSBO atomic intrinsics
*
* All of the SSBO atomic memory operations read a value from memory,
* compute a new value using one of the operations below, write the new
* value to memory, and return the original value read.
*
* All operations take 3 sources except CompSwap that takes 4. These
* sources represent:
*
* 0: The SSBO buffer index.
* 1: The offset into the SSBO buffer of the variable that the atomic
* operation will operate on.
* 2: The data parameter to the atomic function (i.e. the value to add
* in ssbo_atomic_add, etc).
* 3: For CompSwap only: the second data parameter.
*/
INTRINSIC(ssbo_atomic_add, 3, ARR(1, 1, 1), true, 1, 0, 0, 0)
INTRINSIC(ssbo_atomic_min, 3, ARR(1, 1, 1), true, 1, 0, 0, 0)
INTRINSIC(ssbo_atomic_max, 3, ARR(1, 1, 1), true, 1, 0, 0, 0)
INTRINSIC(ssbo_atomic_and, 3, ARR(1, 1, 1), true, 1, 0, 0, 0)
INTRINSIC(ssbo_atomic_or, 3, ARR(1, 1, 1), true, 1, 0, 0, 0)
INTRINSIC(ssbo_atomic_xor, 3, ARR(1, 1, 1), true, 1, 0, 0, 0)
INTRINSIC(ssbo_atomic_exchange, 3, ARR(1, 1, 1), true, 1, 0, 0, 0)
INTRINSIC(ssbo_atomic_comp_swap, 4, ARR(1, 1, 1, 1), true, 1, 0, 0, 0)
#define SYSTEM_VALUE(name, components, num_indices) \
INTRINSIC(load_##name, 0, ARR(), true, components, 0, num_indices, \
NIR_INTRINSIC_CAN_ELIMINATE | NIR_INTRINSIC_CAN_REORDER)
SYSTEM_VALUE(front_face, 1, 0)
SYSTEM_VALUE(vertex_id, 1, 0)
SYSTEM_VALUE(vertex_id_zero_base, 1, 0)
SYSTEM_VALUE(base_vertex, 1, 0)
SYSTEM_VALUE(instance_id, 1, 0)
SYSTEM_VALUE(sample_id, 1, 0)
SYSTEM_VALUE(sample_pos, 2, 0)
SYSTEM_VALUE(sample_mask_in, 1, 0)
SYSTEM_VALUE(invocation_id, 1, 0)
SYSTEM_VALUE(local_invocation_id, 3, 0)
SYSTEM_VALUE(work_group_id, 3, 0)
SYSTEM_VALUE(user_clip_plane, 4, 1) /* const_index[0] is user_clip_plane[idx] */
/*
* The format of the indices depends on the type of the load. For uniforms,
* the first index is the base address and the second index is an offset that
* should be added to the base address. (This way you can determine in the
* back-end which variable is being accessed even in an array.) For inputs,
* the one and only index corresponds to the attribute slot. UBO loads also
* have a single index which is the base address to load from.
*
* UBO loads have a (possibly constant) source which is the UBO buffer index.
* For each type of load, the _indirect variant has one additional source
* (the second in the case of UBO's) that is the is an indirect to be added to
* the constant address or base offset to compute the final offset.
*
* For vector backends, the address is in terms of one vec4, and so each array
* element is +4 scalar components from the previous array element. For scalar
* backends, the address is in terms of a single 4-byte float/int and arrays
* elements begin immediately after the previous array element.
*/
#define LOAD(name, extra_srcs, indices, flags) \
INTRINSIC(load_##name, extra_srcs, ARR(1), true, 0, 0, indices, flags) \
INTRINSIC(load_##name##_indirect, extra_srcs + 1, ARR(1, 1), \
true, 0, 0, indices, flags)
LOAD(uniform, 0, 2, NIR_INTRINSIC_CAN_ELIMINATE | NIR_INTRINSIC_CAN_REORDER)
LOAD(ubo, 1, 1, NIR_INTRINSIC_CAN_ELIMINATE | NIR_INTRINSIC_CAN_REORDER)
LOAD(input, 0, 1, NIR_INTRINSIC_CAN_ELIMINATE | NIR_INTRINSIC_CAN_REORDER)
LOAD(ssbo, 1, 1, NIR_INTRINSIC_CAN_ELIMINATE)
/*
* Stores work the same way as loads, except now the first register input is
* the value or array to store and the optional second input is the indirect
* offset. SSBO stores are similar, but they accept an extra source for the
* block index and an extra index with the writemask to use.
*/
#define STORE(name, extra_srcs, extra_srcs_size, extra_indices, flags) \
INTRINSIC(store_##name, 1 + extra_srcs, \
ARR(0, extra_srcs_size, extra_srcs_size, extra_srcs_size), \
false, 0, 0, 1 + extra_indices, flags) \
INTRINSIC(store_##name##_indirect, 2 + extra_srcs, \
ARR(0, 1, extra_srcs_size, extra_srcs_size), \
false, 0, 0, 1 + extra_indices, flags)
STORE(output, 0, 0, 0, 0)
STORE(ssbo, 1, 1, 1, 0)
LAST_INTRINSIC(store_ssbo_indirect)
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