mirror of
https://github.com/reactos/wine.git
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95afbeadf5
Currently it only accepts a minimal subset of the syntax (e.g. just an instruction and two register types supported) and doesn't produce any real output (i.e. shader bytecode).
132 lines
4.0 KiB
Plaintext
132 lines
4.0 KiB
Plaintext
/*
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* Direct3D shader assembler
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*
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* Copyright 2008 Stefan Dösinger
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* Copyright 2009 Matteo Bruni
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library 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. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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%{
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#include "config.h"
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#include "wine/port.h"
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#include "wine/debug.h"
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#include "d3dx9_36_private.h"
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#include "asmshader.tab.h"
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WINE_DEFAULT_DEBUG_CHANNEL(asmshader);
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%}
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%option noyywrap
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%option prefix="asmshader_"
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%option noinput nounput
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/* Registers */
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REG_TEMP r[0-9]+
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/* for relative addressing in the form o[x], v[x] and c[x] */
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REG_CONSTFLOAT c[0-9]*
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PREPROCESSORDIRECTIVE #[^\n]*\n
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/* Comments */
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DOUBLESLASHCOMMENT "//"[^\n]*
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SEMICOLONCOMMENT ";"[^\n]*
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/* Whitespaces are spaces, tabs and newlines */
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WHITESPACE [ \t]+
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NEWLINE (\n)|(\r\n)
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COMMA ","
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IMMVAL \-?(([0-9]+)|([0-9]*\.[0-9]+))(f)?
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ANY (.)
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%%
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/* Common instructions(vertex and pixel shaders) */
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mov {return INSTR_MOV; }
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{REG_TEMP} {
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asmshader_lval.regnum = atoi(yytext + 1);
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return REG_TEMP;
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}
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{REG_CONSTFLOAT} {
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asmshader_lval.regnum = atoi(yytext + 1);
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return REG_CONSTFLOAT;
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}
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/* Shader versions. These are important to select the correct
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* parser profile.
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*/
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vs\.1\.0|vs_1_0 {return VER_VS10; }
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vs\.1\.1|vs_1_1 {return VER_VS11; }
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vs_2_0 {return VER_VS20; }
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vs_2_x {return VER_VS2X; }
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vs_3_0 {return VER_VS30; }
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ps\.1\.0|ps_1_0 {return VER_PS10; }
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ps\.1\.1|ps_1_1 {return VER_PS11; }
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ps\.1\.2|ps_1_2 {return VER_PS12; }
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ps\.1\.3|ps_1_3 {return VER_PS13; }
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ps\.1\.4|ps_1_4 {return VER_PS14; }
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ps_2_0 {return VER_PS20; }
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ps_2_x {return VER_PS2X; }
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ps_3_0 {return VER_PS30; }
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{COMMA} {return yytext[0]; }
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- {return yytext[0]; }
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\( {return yytext[0]; }
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\) {return yytext[0]; }
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{PREPROCESSORDIRECTIVE} {
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/* TODO: update current line information */
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TRACE("line info update: %s", yytext);
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}
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/* Skip comments */
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{DOUBLESLASHCOMMENT} { }
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{SEMICOLONCOMMENT} { }
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{WHITESPACE} { /* Do nothing */ }
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{NEWLINE} {
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asm_ctx.line_no++;
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}
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{ANY} {
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asmparser_message(&asm_ctx, "Line %u: Unexpected input %s\n", asm_ctx.line_no, yytext);
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set_parse_status(&asm_ctx, PARSE_ERR);
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}
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%%
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struct bwriter_shader *SlAssembleShader(const char *text, char **messages) {
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struct bwriter_shader *ret = NULL;
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YY_BUFFER_STATE buffer;
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TRACE("%p, %p\n", text, messages);
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buffer = asmshader__scan_string(text);
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asmshader__switch_to_buffer(buffer);
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ret = parse_asm_shader(messages);
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asmshader__delete_buffer(buffer);
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return ret;
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}
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