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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)
+
+/*
+ * 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(discard)
+
+INTRINSIC(emit_vertex, 0, ARR(), false, 0, 0, 1, 0)
+INTRINSIC(end_primitive, 0, ARR(), false, 0, 0, 1, 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)
+
+#define SYSTEM_VALUE(name, components) \
+ INTRINSIC(load_##name, 0, ARR(), true, components, 0, 0, \
+ NIR_INTRINSIC_CAN_ELIMINATE | NIR_INTRINSIC_CAN_REORDER)
+
+SYSTEM_VALUE(front_face, 1)
+SYSTEM_VALUE(vertex_id, 1)
+SYSTEM_VALUE(instance_id, 1)
+SYSTEM_VALUE(sample_id, 1)
+SYSTEM_VALUE(sample_pos, 2)
+SYSTEM_VALUE(sample_mask_in, 1)
+SYSTEM_VALUE(invocation_id, 1)
+
+/*
+ * The first index is the address to load from, and the second index is the
+ * number of array elements to load. Indirect loads have an additional
+ * register input, which is added to the constant address to compute the
+ * final address to load from. For UBO's (and SSBO's), the first source is
+ * the (possibly constant) UBO buffer index and the indirect (if it exists)
+ * is the second source.
+ *
+ * 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, flags) \
+ INTRINSIC(load_##name, extra_srcs, ARR(1), true, 0, 0, 2, flags) \
+ INTRINSIC(load_##name##_indirect, extra_srcs + 1, ARR(1, 1), \
+ true, 0, 0, 2, flags)
+
+LOAD(uniform, 0, NIR_INTRINSIC_CAN_ELIMINATE | NIR_INTRINSIC_CAN_REORDER)
+LOAD(ubo, 1, NIR_INTRINSIC_CAN_ELIMINATE | NIR_INTRINSIC_CAN_REORDER)
+LOAD(input, 0, NIR_INTRINSIC_CAN_ELIMINATE | NIR_INTRINSIC_CAN_REORDER)
+/* LOAD(ssbo, 1, 0) */
+
+/*
+ * 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.
+ */
+
+#define STORE(name, num_indices, flags) \
+ INTRINSIC(store_##name, 1, ARR(0), false, 0, 0, num_indices, flags) \
+ INTRINSIC(store_##name##_indirect, 2, ARR(0, 1), false, 0, 0, \
+ num_indices, flags) \
+
+STORE(output, 2, 0)
+/* STORE(ssbo, 3, 0) */
+
+LAST_INTRINSIC(store_output_indirect)