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Add native support for (AO)SOA data layout.

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There's now a SOA variability class (in addition to uniform,
varying, and unbound variability); the SOA factor must be a
positive power of 2.

When applied to a type, the leaf elements of the type (i.e.
atomic types, pointer types, and enum types) are widened out
into arrays of the given SOA factor.  For example, given

struct Point { float x, y, z; };

Then "soa<8> Point" has a memory layout of "float x[8], y[8],
z[8]".

Furthermore, array indexing syntax has been augmented so that
when indexing into arrays of SOA-variability data, the two-stage
indexing (first into the array of soa<> elements and then into
the leaf arrays of SOA data) is performed automatically.
This commit is contained in:
Matt Pharr
2012-03-05 09:49:44 -08:00
parent 8fdf84de04
commit db5db5aefd
9 changed files with 1547 additions and 442 deletions
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33
parse.yy
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@@ -1,5 +1,5 @@
/*
Copyright (c) 2010-2011, Intel Corporation
Copyright (c) 2010-2012, Intel Corporation
All rights reserved.
Redistribution and use in source and binary forms, with or without
@@ -224,7 +224,7 @@ struct ForeachDimension {
%type <enumType> enum_specifier
%type <type> specifier_qualifier_list struct_or_union_specifier
%type <type> type_specifier type_name rate_qualified_new_type
%type <type> type_specifier type_name rate_qualified_type_specifier
%type <type> short_vec_specifier
%type <atomicType> atomic_var_type_specifier
@@ -476,7 +476,7 @@ rate_qualified_new
| TOKEN_VARYING TOKEN_NEW { $$ = TYPEQUAL_VARYING; }
;
rate_qualified_new_type
rate_qualified_type_specifier
: type_specifier { $$ = $1; }
| TOKEN_UNIFORM type_specifier
{
@@ -500,19 +500,40 @@ rate_qualified_new_type
else
$$ = $2->GetAsVaryingType();
}
| soa_width_specifier type_specifier
{
if ($2 == NULL)
$$ = NULL;
else {
int soaWidth = $1;
const StructType *st = dynamic_cast<const StructType *>($2);
if (st == NULL) {
Error(@1, "\"soa\" qualifier is illegal with non-struct type \"%s\".",
$2->GetString().c_str());
$$ = NULL;
}
else if (soaWidth <= 0 || (soaWidth & (soaWidth - 1)) != 0) {
Error(@1, "soa<%d> width illegal. Value must be positive power "
"of two.", soaWidth);
$$ = NULL;
}
else
$$ = st->GetAsSOAType(soaWidth);
}
}
;
new_expression
: conditional_expression
| rate_qualified_new rate_qualified_new_type
| rate_qualified_new rate_qualified_type_specifier
{
$$ = new NewExpr((int32_t)$1, $2, NULL, NULL, @1, Union(@1, @2));
}
| rate_qualified_new rate_qualified_new_type '(' initializer_list ')'
| rate_qualified_new rate_qualified_type_specifier '(' initializer_list ')'
{
$$ = new NewExpr((int32_t)$1, $2, $4, NULL, @1, Union(@1, @2));
}
| rate_qualified_new rate_qualified_new_type '[' expression ']'
| rate_qualified_new rate_qualified_type_specifier '[' expression ']'
{
$$ = new NewExpr((int32_t)$1, $2, NULL, $4, @1, Union(@1, @4));
}