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#!/usr/bin/env python
# $Id: glx86asm.py,v 1.8 2003/10/22 21:02:15 kendallb Exp $
# Mesa 3-D graphics library
# Version: 4.1
#
# Copyright (C) 1999-2001 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 src/X86/glapi_x86.S file.
#
# Usage:
# gloffsets.py >glapi_x86.S
#
# Dependencies:
# The apispec file must be in the current directory.
import apiparser
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(STDCALL_API)'
print '#define GL_PREFIX(n,n2) GLNAME(CONCAT(gl,n2))'
print '#elif defined(USE_MGL_NAMESPACE)'
print '#define GL_PREFIX(n,n2) GLNAME(CONCAT(mgl,n))'
print '#else'
print '#define GL_PREFIX(n,n2) 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 'SEG_TEXT'
print ''
print 'EXTERN GLNAME(_glapi_Dispatch)'
print ''
return
#enddef
def PrintTail():
print ''
print '#endif /* __WIN32__ */'
#enddef
records = []
def FindOffset(funcName):
for (name, alias, offset) in records:
if name == funcName:
return offset
#endif
#endfor
return -1
#enddef
# Find the size of the arguments on the stack for _stdcall name mangling
def FindStackSize(typeList):
result = 0
for typ in typeList:
if typ == 'GLdouble' or typ == 'GLclampd':
result += 8;
else:
result += 4;
#endif
#endfor
return result
#enddef
def EmitFunction(name, returnType, argTypeList, argNameList, alias, offset):
argList = apiparser.MakeArgList(argTypeList, argNameList)
if alias != '':
dispatchName = alias
else:
dispatchName = name
#endif
if offset < 0:
# try to find offset from alias name
assert dispatchName != ''
offset = FindOffset(dispatchName)
if offset == -1:
#print 'Cannot dispatch %s' % name
return
#endif
#endif
# save this info in case we need to look up an alias later
records.append((name, dispatchName, offset))
# Find the argument stack size for _stdcall name mangling
stackSize = FindStackSize(argTypeList)
# print the assembly code
print 'ALIGNTEXT16'
print "GLOBL_FN(GL_PREFIX(%s,%s@%s))" % (name, name, stackSize)
print "GL_PREFIX(%s,%s@%s):" % (name, name, stackSize)
print '\tMOV_L(CONTENT(GLNAME(_glapi_Dispatch)), EAX)'
print "\tJMP(GL_OFFSET(_gloffset_%s))" % (dispatchName)
print ''
#enddef
PrintHead()
apiparser.ProcessSpecFile("APIspec", EmitFunction)
PrintTail()
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