nir: add support for address bit sized system values
v2: add assert in else clause make local group intrinsics 32 bit wide v3: always use 32 bit constant for local_size v4: add comment by Jason Signed-off-by: Karol Herbst <kherbst@redhat.com> Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl> Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
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@ -532,7 +532,7 @@ system_value("subgroup_lt_mask", 0, bit_sizes=[32, 64])
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system_value("num_subgroups", 1)
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system_value("subgroup_id", 1)
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system_value("local_group_size", 3)
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system_value("global_invocation_id", 3)
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system_value("global_invocation_id", 3, bit_sizes=[32, 64])
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system_value("work_dim", 1)
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# Driver-specific viewport scale/offset parameters.
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#
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@ -29,7 +29,7 @@
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#include "nir_builder.h"
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static nir_ssa_def*
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build_local_group_size(nir_builder *b)
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build_local_group_size(nir_builder *b, unsigned bit_size)
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{
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nir_ssa_def *local_size;
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@ -40,6 +40,8 @@ build_local_group_size(nir_builder *b)
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if (b->shader->info.cs.local_size_variable) {
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local_size = nir_load_local_group_size(b);
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} else {
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/* using a 32 bit constant is safe here as no device/driver needs more
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* than 32 bits for the local size */
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nir_const_value local_size_const;
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memset(&local_size_const, 0, sizeof(local_size_const));
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local_size_const.u32[0] = b->shader->info.cs.local_size[0];
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@ -48,12 +50,15 @@ build_local_group_size(nir_builder *b)
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local_size = nir_build_imm(b, 3, 32, local_size_const);
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}
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return local_size;
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return nir_u2u(b, local_size, bit_size);
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}
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static nir_ssa_def *
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build_local_invocation_id(nir_builder *b)
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build_local_invocation_id(nir_builder *b, unsigned bit_size)
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{
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/* If lower_cs_local_id_from_index is true, then we derive the local
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* index from the local id.
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*/
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if (b->shader->options->lower_cs_local_id_from_index) {
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/* We lower gl_LocalInvocationID from gl_LocalInvocationIndex based
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* on this formula:
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@ -73,8 +78,12 @@ build_local_invocation_id(nir_builder *b)
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* large so it can safely be omitted.
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*/
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nir_ssa_def *local_index = nir_load_local_invocation_index(b);
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nir_ssa_def *local_size = build_local_group_size(b);
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nir_ssa_def *local_size = build_local_group_size(b, 32);
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/* Because no hardware supports a local workgroup size greater than
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* about 1K, this calculation can be done in 32-bit and can save some
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* 64-bit arithmetic.
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*/
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nir_ssa_def *id_x, *id_y, *id_z;
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id_x = nir_umod(b, local_index,
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nir_channel(b, local_size, 0));
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@ -84,9 +93,9 @@ build_local_invocation_id(nir_builder *b)
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id_z = nir_udiv(b, local_index,
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nir_imul(b, nir_channel(b, local_size, 0),
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nir_channel(b, local_size, 1)));
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return nir_vec3(b, id_x, id_y, id_z);
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return nir_u2u(b, nir_vec3(b, id_x, id_y, id_z), bit_size);
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} else {
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return nir_load_local_invocation_id(b);
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return nir_u2u(b, nir_load_local_invocation_id(b), bit_size);
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}
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}
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@ -120,6 +129,7 @@ convert_block(nir_block *block, nir_builder *b)
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b->cursor = nir_after_instr(&load_deref->instr);
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unsigned bit_size = nir_dest_bit_size(load_deref->dest);
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nir_ssa_def *sysval = NULL;
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switch (var->data.location) {
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case SYSTEM_VALUE_GLOBAL_INVOCATION_ID: {
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@ -128,9 +138,9 @@ convert_block(nir_block *block, nir_builder *b)
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* "The value of gl_GlobalInvocationID is equal to
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* gl_WorkGroupID * gl_WorkGroupSize + gl_LocalInvocationID"
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*/
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nir_ssa_def *group_size = build_local_group_size(b);
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nir_ssa_def *group_id = nir_load_work_group_id(b);
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nir_ssa_def *local_id = build_local_invocation_id(b);
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nir_ssa_def *group_size = build_local_group_size(b, bit_size);
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nir_ssa_def *group_id = nir_u2u(b, nir_load_work_group_id(b), bit_size);
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nir_ssa_def *local_id = build_local_invocation_id(b, bit_size);
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sysval = nir_iadd(b, nir_imul(b, group_id, group_size), local_id);
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break;
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@ -157,24 +167,25 @@ convert_block(nir_block *block, nir_builder *b)
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nir_ssa_def *size_y =
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nir_imm_int(b, b->shader->info.cs.local_size[1]);
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/* Because no hardware supports a local workgroup size greater than
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* about 1K, this calculation can be done in 32-bit and can save some
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* 64-bit arithmetic.
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*/
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sysval = nir_imul(b, nir_channel(b, local_id, 2),
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nir_imul(b, size_x, size_y));
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sysval = nir_iadd(b, sysval,
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nir_imul(b, nir_channel(b, local_id, 1), size_x));
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sysval = nir_iadd(b, sysval, nir_channel(b, local_id, 0));
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sysval = nir_u2u(b, sysval, bit_size);
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break;
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}
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case SYSTEM_VALUE_LOCAL_INVOCATION_ID:
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/* If lower_cs_local_id_from_index is true, then we derive the local
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* index from the local id.
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*/
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if (b->shader->options->lower_cs_local_id_from_index)
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sysval = build_local_invocation_id(b);
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sysval = build_local_invocation_id(b, bit_size);
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break;
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case SYSTEM_VALUE_LOCAL_GROUP_SIZE: {
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sysval = build_local_group_size(b);
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sysval = build_local_group_size(b, bit_size);
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break;
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}
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@ -248,8 +259,8 @@ convert_block(nir_block *block, nir_builder *b)
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break;
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case SYSTEM_VALUE_GLOBAL_GROUP_SIZE: {
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nir_ssa_def *group_size = build_local_group_size(b);
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nir_ssa_def *num_work_groups = nir_load_num_work_groups(b);
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nir_ssa_def *group_size = build_local_group_size(b, bit_size);
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nir_ssa_def *num_work_groups = nir_u2u(b, nir_load_num_work_groups(b), bit_size);
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sysval = nir_imul(b, group_size, num_work_groups);
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break;
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}
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