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The destination operand must be a full four component vector, but the source can be smaller and small sources do not need to be aligned: the offset of the source operand and the swizzle indices are adjusted. The adjustments are done during final statement emission in order to avoid confusing the data flow analyser (and that's when def offsets are known).
68 lines
2.5 KiB
C
68 lines
2.5 KiB
C
/*
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expr_names.h
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expression construction and manipulations
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Copyright (C) 2022 Bill Currie <bill@taniwha.org>
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Author: Bill Currie <bill@taniwha.org>
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Date: 2022/01/7
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to:
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Free Software Foundation, Inc.
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59 Temple Place - Suite 330
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Boston, MA 02111-1307, USA
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*/
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/** \defgroup qfcc_expr Expressions
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\ingroup qfcc
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*/
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///@{
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#ifndef EX_EXPR
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#define EX_EXPR(expr)
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#endif
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EX_EXPR(error) ///< error expression. used to signal an error
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EX_EXPR(state) ///< state expression (::ex_state_t)
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EX_EXPR(bool) ///< short circuit boolean logic expression (::ex_bool_t)
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EX_EXPR(label) ///< goto/branch label (::ex_label_t)
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EX_EXPR(labelref) ///< label reference (::ex_labelref_t)
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EX_EXPR(block) ///< statement block expression (::ex_block_t)
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EX_EXPR(expr) ///< binary expression (::ex_expr_t)
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EX_EXPR(uexpr) ///< unary expression (::ex_expr_t)
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EX_EXPR(def) ///< non-temporary variable (::def_t)
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EX_EXPR(symbol) ///< non-temporary variable (::symbol_t)
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EX_EXPR(temp) ///< temporary variable (::ex_temp_t)
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EX_EXPR(vector) ///< "vector" expression (::ex_vector_t)
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EX_EXPR(selector) ///< selector expression (::ex_selector_t)
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EX_EXPR(nil) ///< umm, nil, null. nuff said (0 of any type)
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EX_EXPR(value) ///< constant value (::ex_value_t)
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EX_EXPR(compound) ///< compound initializer
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EX_EXPR(memset) ///< memset needs three params...
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EX_EXPR(alias) ///< view expression as different type (::ex_alias_t)
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EX_EXPR(address) ///< address of an lvalue expression (::ex_address_t)
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EX_EXPR(assign) ///< assignment of src expr to dst expr (::ex_assing_t)
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EX_EXPR(branch) ///< branch expression (::ex_branch_t)
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EX_EXPR(return) ///< return expression (::ex_return_t)
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EX_EXPR(adjstk) ///< stack adjust expression (::ex_adjstk_t)
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EX_EXPR(with) ///< with expression (::ex_with_t)
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EX_EXPR(args) ///< @args marker in parameter list. no data
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EX_EXPR(horizontal) ///< horizontal vector operation (::ex_horzontal_t)
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EX_EXPR(swizzle) ///< vector swizzle operation (::ex_swizzle_t)
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///@}
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