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#!/usr/bin/env python
# $Id: glx86asm.py,v 1.3.2.1 2002/04/01 17:09:25 brianp Exp $
# Mesa 3-D graphics library
# Version: 3.4
#
# Copyright (C) 1999-2000 Brian Paul All Rights Reserved.
#
# Permission is hereby granted, free of charge, to any person obtaining a
# copy of this software and associated documentation files (the "Software"),
# to deal in the Software without restriction, including without limitation
# the rights to use, copy, modify, merge, publish, distribute, sublicense,
# and/or sell copies of the Software, and to permit persons to whom the
# Software is furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included
# in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
# BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
# AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
# Generate the glapi_x86.S assembly language file.
#
# Usage:
# glx86asm.py >glapi_x86.S
#
# Dependencies:
# The gl.spec file from the SI must be in the current directory.
#
# Brian Paul 11 May 2000
import string
import re
def PrintHead():
print '/* DO NOT EDIT - This file generated automatically with glx86asm.py script */'
print '#include "assyntax.h"'
print '#include "glapioffsets.h"'
print ''
print '#ifndef __WIN32__'
print ''
print '#if defined(USE_MGL_NAMESPACE)'
print '#define GL_PREFIX(n) GLNAME(CONCAT(mgl,n))'
print '#else'
print '#define GL_PREFIX(n) GLNAME(CONCAT(gl,n))'
print '#endif'
print ''
print '#define GL_OFFSET(x) CODEPTR(REGOFF(4 * x, EAX))'
print ''
print '#if defined(GNU_ASSEMBLER) && !defined(DJGPP)'
print '#define GLOBL_FN(x) GLOBL x ; .type x,@function'
print '#else'
print '#define GLOBL_FN(x) GLOBL x'
print '#endif'
print ''
print ''
return
#endif
def PrintTail():
print ''
print '#endif /* __WIN32__ */'
#endif
def GenerateDispatchCode(name, offset):
print 'ALIGNTEXT16'
print "GLOBL_FN(GL_PREFIX(%s))" % (name)
print "GL_PREFIX(%s):" % (name)
print '\tMOV_L(GLNAME(_glapi_Dispatch), EAX)'
print "\tJMP(GL_OFFSET(_gloffset_%s))" % (offset)
print ''
#enddef
def FindAlias(list, funcName):
for i in range(0, len(list)):
entry = list[i]
if entry[0] == funcName:
return entry[1]
#endif
#endfor
return ''
#enddef
def PrintDefines():
functionPattern = re.compile('^[a-zA-Z0-9]+\(')
functionNamePattern = re.compile('^[a-zA-Z0-9]+')
funcName = ''
functions = [ ]
f = open('gl.spec')
for line in f.readlines():
m = functionPattern.match(line)
if m:
# extract funcName
n = functionNamePattern.findall(line)
funcName = n[0]
m = string.split(line)
if len(m) > 1:
if m[0] == 'param':
paramName = m[1]
if m[0] == 'offset':
if m[1] == '?':
#print 'WARNING skipping', funcName
noop = 0
else:
entry = [ funcName, funcName ]
functions.append(entry)
#endif
elif m[0] == 'alias':
aliasedName = FindAlias(functions, m[1])
if aliasedName:
entry = [ funcName, aliasedName ]
functions.append(entry)
else:
print 'WARNING: alias to unknown function:', aliasedName
#endif
#endif
#endif
#endfor
# Now generate the assembly dispatch code
for i in range(0, len(functions)):
entry = functions[i]
GenerateDispatchCode( entry[0], entry[1] )
#enddef
PrintHead()
PrintDefines()
PrintTail()
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