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/*
* Copyright (C) 2015-2018 Rob Clark <robclark@freedesktop.org>
*
* 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:
* Rob Clark <robclark@freedesktop.org>
*/
#ifndef IR3_CONTEXT_H_
#define IR3_CONTEXT_H_
#include "ir3_compiler.h"
#include "ir3_nir.h"
#include "ir3.h"
/* for conditionally setting boolean flag(s): */
#define COND(bool, val) ((bool) ? (val) : 0)
#define DBG(fmt, ...) \
do { debug_printf("%s:%d: "fmt "\n", \
__FUNCTION__, __LINE__, ##__VA_ARGS__); } while (0)
/**
* The context for compilation of a single shader.
*/
struct ir3_context {
struct ir3_compiler *compiler;
const struct ir3_context_funcs *funcs;
struct nir_shader *s;
struct nir_instr *cur_instr; /* current instruction, just for debug */
struct ir3 *ir;
struct ir3_shader_variant *so;
struct ir3_block *block; /* the current block */
struct ir3_block *in_block; /* block created for shader inputs */
nir_function_impl *impl;
/* For fragment shaders, varyings are not actual shader inputs,
* instead the hw passes a varying-coord which is used with
* bary.f.
*
* But NIR doesn't know that, it still declares varyings as
* inputs. So we do all the input tracking normally and fix
* things up after compile_instructions()
*
* NOTE that frag_vcoord is the hardware position (possibly it
* is actually an index or tag or some such.. it is *not*
* values that can be directly used for gl_FragCoord..)
*/
struct ir3_instruction *frag_vcoord;
/* for fragment shaders, for gl_FrontFacing and gl_FragCoord: */
struct ir3_instruction *frag_face, *frag_coord;
/* For vertex shaders, keep track of the system values sources */
struct ir3_instruction *vertex_id, *basevertex, *instance_id;
/* For fragment shaders: */
struct ir3_instruction *samp_id, *samp_mask_in;
/* Compute shader inputs: */
struct ir3_instruction *local_invocation_id, *work_group_id;
/* mapping from nir_register to defining instruction: */
struct hash_table *def_ht;
unsigned num_arrays;
/* Tracking for max level of flowcontrol (branchstack) needed
* by a5xx+:
*/
unsigned stack, max_stack;
/* a common pattern for indirect addressing is to request the
* same address register multiple times. To avoid generating
* duplicate instruction sequences (which our backend does not
* try to clean up, since that should be done as the NIR stage)
* we cache the address value generated for a given src value:
*
* Note that we have to cache these per alignment, since same
* src used for an array of vec1 cannot be also used for an
* array of vec4.
*/
struct hash_table *addr_ht[4];
/* last dst array, for indirect we need to insert a var-store.
*/
struct ir3_instruction **last_dst;
unsigned last_dst_n;
/* maps nir_block to ir3_block, mostly for the purposes of
* figuring out the blocks successors
*/
struct hash_table *block_ht;
/* on a4xx, bitmask of samplers which need astc+srgb workaround: */
unsigned astc_srgb;
unsigned samples; /* bitmask of x,y sample shifts */
unsigned max_texture_index;
/* set if we encounter something we can't handle yet, so we
* can bail cleanly and fallback to TGSI compiler f/e
*/
bool error;
};
struct ir3_context_funcs {
void (*emit_intrinsic_load_ssbo)(struct ir3_context *ctx, nir_intrinsic_instr *intr,
struct ir3_instruction **dst);
void (*emit_intrinsic_store_ssbo)(struct ir3_context *ctx, nir_intrinsic_instr *intr);
struct ir3_instruction * (*emit_intrinsic_atomic_ssbo)(struct ir3_context *ctx, nir_intrinsic_instr *intr);
void (*emit_intrinsic_store_image)(struct ir3_context *ctx, nir_intrinsic_instr *intr);
struct ir3_instruction * (*emit_intrinsic_atomic_image)(struct ir3_context *ctx, nir_intrinsic_instr *intr);
};
extern const struct ir3_context_funcs ir3_a4xx_funcs;
extern const struct ir3_context_funcs ir3_a6xx_funcs;
struct ir3_context * ir3_context_init(struct ir3_compiler *compiler,
struct ir3_shader_variant *so);
void ir3_context_free(struct ir3_context *ctx);
/* gpu pointer size in units of 32bit registers/slots */
static inline
unsigned ir3_pointer_size(struct ir3_context *ctx)
{
return (ctx->compiler->gpu_id >= 500) ? 2 : 1;
}
struct ir3_instruction ** ir3_get_dst_ssa(struct ir3_context *ctx, nir_ssa_def *dst, unsigned n);
struct ir3_instruction ** ir3_get_dst(struct ir3_context *ctx, nir_dest *dst, unsigned n);
struct ir3_instruction * const * ir3_get_src(struct ir3_context *ctx, nir_src *src);
void ir3_put_dst(struct ir3_context *ctx, nir_dest *dst);
struct ir3_instruction * ir3_create_collect(struct ir3_context *ctx,
struct ir3_instruction *const *arr, unsigned arrsz);
void ir3_split_dest(struct ir3_block *block, struct ir3_instruction **dst,
struct ir3_instruction *src, unsigned base, unsigned n);
void ir3_context_error(struct ir3_context *ctx, const char *format, ...);
#define compile_assert(ctx, cond) do { \
if (!(cond)) ir3_context_error((ctx), "failed assert: "#cond"\n"); \
} while (0)
struct ir3_instruction * ir3_get_addr(struct ir3_context *ctx,
struct ir3_instruction *src, int align);
struct ir3_instruction * ir3_get_predicate(struct ir3_context *ctx,
struct ir3_instruction *src);
void ir3_declare_array(struct ir3_context *ctx, nir_register *reg);
struct ir3_array * ir3_get_array(struct ir3_context *ctx, nir_register *reg);
struct ir3_instruction *ir3_create_array_load(struct ir3_context *ctx,
struct ir3_array *arr, int n, struct ir3_instruction *address);
void ir3_create_array_store(struct ir3_context *ctx, struct ir3_array *arr, int n,
struct ir3_instruction *src, struct ir3_instruction *address);
static inline type_t utype_for_size(unsigned bit_size)
{
switch (bit_size) {
case 32: return TYPE_U32;
case 16: return TYPE_U16;
case 8: return TYPE_U8;
default: unreachable("bad bitsize"); return ~0;
}
}
static inline type_t utype_src(nir_src src)
{ return utype_for_size(nir_src_bit_size(src)); }
static inline type_t utype_dst(nir_dest dst)
{ return utype_for_size(nir_dest_bit_size(dst)); }
#endif /* IR3_CONTEXT_H_ */
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