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spirv: Handle MakePointerAvailable/Visible

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Emit barriers with semantics matching the access operand and the
storage class of the pointer.

v2: Fix order of visible / available emission relative to the
    operations.  (Bas)

Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
This commit is contained in:
Caio Marcelo de Oliveira Filho
2019-09-10 13:21:08 -07:00
parent 129c85c28b
commit b8784fe652
1 changed files with 32 additions and 0 deletions
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32
src/compiler/spirv/vtn_variables.c
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@@ -2533,6 +2533,22 @@ vtn_handle_variables(struct vtn_builder *b, SpvOp opcode,
return;
}
if (count > 4) {
unsigned idx = 5;
SpvMemoryAccessMask access = w[4];
if (access & SpvMemoryAccessAlignedMask)
idx++;
if (access & SpvMemoryAccessMakePointerVisibleMask) {
SpvMemorySemanticsMask semantics =
SpvMemorySemanticsMakeVisibleMask |
vtn_storage_class_to_memory_semantics(src->ptr_type->storage_class);
SpvScope scope = vtn_constant_uint(b, w[idx]);
vtn_emit_memory_barrier(b, scope, semantics);
}
}
vtn_push_ssa(b, w[2], res_type, vtn_variable_load(b, src));
break;
}
@@ -2582,6 +2598,22 @@ vtn_handle_variables(struct vtn_builder *b, SpvOp opcode,
struct vtn_ssa_value *src = vtn_ssa_value(b, w[2]);
vtn_variable_store(b, src, dest);
if (count > 3) {
unsigned idx = 4;
SpvMemoryAccessMask access = w[3];
if (access & SpvMemoryAccessAlignedMask)
idx++;
if (access & SpvMemoryAccessMakePointerAvailableMask) {
SpvMemorySemanticsMask semantics =
SpvMemorySemanticsMakeAvailableMask |
vtn_storage_class_to_memory_semantics(dest->ptr_type->storage_class);
SpvScope scope = vtn_constant_uint(b, w[idx]);
vtn_emit_memory_barrier(b, scope, semantics);
}
}
break;
}