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#!/usr/bin/env python

# (C) Copyright IBM Corporation 2004, 2005

# 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

# on the rights to use, copy, modify, merge, publish, distribute, sub

# license, 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 (including the next

# paragraph) 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 NON-INFRINGEMENT.  IN NO EVENT SHALL

# IBM AND/OR ITS SUPPLIERS 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.

#

# Authors:

#    Ian Romanick 

import license

import gl_XML, glX_XML

import sys, getopt

class PrintGenericStubs(gl_XML.gl_print_base):

    def __init__(self):

        gl_XML.gl_print_base.__init__(self)

        self.name = "gl_x86_asm.py (from Mesa)"

        self.license = license.bsd_license_template % ( \

"""Copyright (C) 1999-2001  Brian Paul   All Rights Reserved.

(C) Copyright IBM Corporation 2004, 2005""", "BRIAN PAUL, IBM")

        return

    def get_stack_size(self, f):

        size = 0

        for p in f.parameterIterator():

            if p.is_padding:

                continue

            size += p.get_stack_size()

        return size

    def printRealHeader(self):

        print '#include "x86/assyntax.h"'

        print ''

        print '#if defined(STDCALL_API)'

        print '# if defined(USE_MGL_NAMESPACE)'

        print '#  define GL_PREFIX(n,n2) GLNAME(CONCAT(mgl,n2))'

        print '# else'

        print '#  define GL_PREFIX(n,n2) GLNAME(CONCAT(gl,n2))'

        print '# endif'

        print '#else'

        print '# if defined(USE_MGL_NAMESPACE)'

        print '#  define GL_PREFIX(n,n2) GLNAME(CONCAT(mgl,n))'

        print '#  define _glapi_Dispatch _mglapi_Dispatch'

        print '# else'

        print '#  define GL_PREFIX(n,n2) GLNAME(CONCAT(gl,n))'

        print '# endif'

        print '#endif'

        print ''

        print '#define GL_OFFSET(x) CODEPTR(REGOFF(4 * x, EAX))'

        print ''

        print '#if defined(GNU_ASSEMBLER) && !defined(__MINGW32__) && !defined(__APPLE__)'

        print '#define GLOBL_FN(x) GLOBL x ; .type x, @function'

        print '#else'

        print '#define GLOBL_FN(x) GLOBL x'

        print '#endif'

        print ''

        print ''

        print '#ifdef GLX_USE_TLS'

        print ''

        print '#ifdef GLX_X86_READONLY_TEXT'

        print '# define CTX_INSNS MOV_L(GS:(EAX), EAX)'

        print '#else'

        print '# define CTX_INSNS NOP /* Pad for init_glapi_relocs() */'

        print '#endif'

        print ''

        print '#  define GL_STUB(fn,off,fn_alt)\t\t\t\\'

        print 'ALIGNTEXT16;\t\t\t\t\t\t\\'

        print 'GLOBL_FN(GL_PREFIX(fn, fn_alt));\t\t\t\\'

        print 'GL_PREFIX(fn, fn_alt):\t\t\t\t\t\\'

        print '\tCALL(_x86_get_dispatch) ;\t\t\t\\'

        print '\tCTX_INSNS ;					\\'

        print '\tJMP(GL_OFFSET(off))'

        print ''

        print '#elif defined(HAVE_PTHREAD)'

        print '#  define GL_STUB(fn,off,fn_alt)\t\t\t\\'

        print 'ALIGNTEXT16;\t\t\t\t\t\t\\'

        print 'GLOBL_FN(GL_PREFIX(fn, fn_alt));\t\t\t\\'

        print 'GL_PREFIX(fn, fn_alt):\t\t\t\t\t\\'

        print '\tMOV_L(CONTENT(GLNAME(_glapi_Dispatch)), EAX) ;\t\\'

        print '\tTEST_L(EAX, EAX) ;\t\t\t\t\\'

        print '\tJE(1f) ;\t\t\t\t\t\\'

        print '\tJMP(GL_OFFSET(off)) ;\t\t\t\t\\'

        print '1:\tCALL(_x86_get_dispatch) ;\t\t\t\\'

        print '\tJMP(GL_OFFSET(off))'

        print '#else'

        print '#  define GL_STUB(fn,off,fn_alt)\t\t\t\\'

        print 'ALIGNTEXT16;\t\t\t\t\t\t\\'

        print 'GLOBL_FN(GL_PREFIX(fn, fn_alt));\t\t\t\\'

        print 'GL_PREFIX(fn, fn_alt):\t\t\t\t\t\\'

        print '\tMOV_L(CONTENT(GLNAME(_glapi_Dispatch)), EAX) ;\t\\'

        print '\tTEST_L(EAX, EAX) ;\t\t\t\t\\'

        print '\tJE(1f) ;\t\t\t\t\t\\'

        print '\tJMP(GL_OFFSET(off)) ;\t\t\t\t\\'

        print '1:\tCALL(_glapi_get_dispatch) ;\t\t\t\\'

        print '\tJMP(GL_OFFSET(off))'

        print '#endif'

        print ''

        print '#ifdef HAVE_ALIAS'

        print '#  define GL_STUB_ALIAS(fn,off,fn_alt,alias,alias_alt)\t\\'

        print '\t.globl\tGL_PREFIX(fn, fn_alt) ;\t\t\t\\'

        print '\t.set\tGL_PREFIX(fn, fn_alt), GL_PREFIX(alias, alias_alt)'

        print '#else'

        print '#  define GL_STUB_ALIAS(fn,off,fn_alt,alias,alias_alt)\t\\'

        print '    GL_STUB(fn, off, fn_alt)'

        print '#endif'

        print ''

        print 'SEG_TEXT'

        print ''

        print '#ifdef GLX_USE_TLS'

        print ''

        print '\tGLOBL\tGLNAME(_x86_get_dispatch)'

        print '\tHIDDEN(GLNAME(_x86_get_dispatch))'

        print 'ALIGNTEXT16'

        print 'GLNAME(_x86_get_dispatch):'

        print '\tcall	1f'

        print '1:\tpopl	%eax'

        print '\taddl	$_GLOBAL_OFFSET_TABLE_+[.-1b], %eax'

        print '\tmovl	_glapi_tls_Dispatch@GOTNTPOFF(%eax), %eax'

        print '\tret'

        print ''

        print '#elif defined(HAVE_PTHREAD)'

        print 'EXTERN GLNAME(_glapi_Dispatch)'

        print 'EXTERN GLNAME(_gl_DispatchTSD)'

        print 'EXTERN GLNAME(pthread_getspecific)'

        print ''

        print 'ALIGNTEXT16'

        print 'GLNAME(_x86_get_dispatch):'

        print '\tSUB_L(CONST(24), ESP)'

        print '\tPUSH_L(GLNAME(_gl_DispatchTSD))'

        print '\tCALL(GLNAME(pthread_getspecific))'

        print '\tADD_L(CONST(28), ESP)'

        print '\tRET'

        print '#else'

        print 'EXTERN GLNAME(_glapi_get_dispatch)'

        print '#endif'

        print ''

        print '#if defined( GLX_USE_TLS ) && !defined( GLX_X86_READONLY_TEXT )'

        print '\t\t.section\twtext, "awx", @progbits'

        print '#endif /* defined( GLX_USE_TLS ) */'

        print ''

        print '\t\tALIGNTEXT16'

        print '\t\tGLOBL GLNAME(gl_dispatch_functions_start)'

        print '\t\tHIDDEN(GLNAME(gl_dispatch_functions_start))'

        print 'GLNAME(gl_dispatch_functions_start):'

        print ''

        return

    def printRealFooter(self):

        print ''

        print '\t\tGLOBL\tGLNAME(gl_dispatch_functions_end)'

        print '\t\tHIDDEN(GLNAME(gl_dispatch_functions_end))'

        print '\t\tALIGNTEXT16'

        print 'GLNAME(gl_dispatch_functions_end):'

        print ''

        print '#if defined (__ELF__) && defined (__linux__)'

        print '	.section .note.GNU-stack,"",%progbits'

        print '#endif'

        return

    def printBody(self, api):

        for f in api.functionIterateByOffset():

            name = f.dispatch_name()

            stack = self.get_stack_size(f)

            alt = "%s@%u" % (name, stack)

            print '\tGL_STUB(%s, %d, %s)' % (name, f.offset, alt)

            if not f.is_static_entry_point(f.name):

                print '\tHIDDEN(GL_PREFIX(%s, %s))' % (name, alt)

        for f in api.functionIterateByOffset():

            name = f.dispatch_name()

            stack = self.get_stack_size(f)

            alt = "%s@%u" % (name, stack)

            for n in f.entry_points:

                if f.is_static_entry_point(n):

                    if n != f.name:

                        alt2 = "%s@%u" % (n, stack)

                        text = '\tGL_STUB_ALIAS(%s, %d, %s, %s, %s)' % (n, f.offset, alt2, name, alt)

                        if f.has_different_protocol(n):

                            print '#ifndef GLX_INDIRECT_RENDERING'

                            print text

                            print '#endif'

                        else:

                            print text

        return

def show_usage():

    print "Usage: %s [-f input_file_name] [-m output_mode]" % sys.argv[0]

    sys.exit(1)

if __name__ == '__main__':

    file_name = "gl_API.xml"

    mode = "generic"

    try:

        (args, trail) = getopt.getopt(sys.argv[1:], "m:f:")

    except Exception,e:

        show_usage()

    for (arg,val) in args:

        if arg == '-m':

            mode = val

        elif arg == "-f":

            file_name = val

    if mode == "generic":

        printer = PrintGenericStubs()

    else:

        print "ERROR: Invalid mode \"%s\" specified." % mode

        show_usage()

    api = gl_XML.parse_GL_API(file_name, glX_XML.glx_item_factory())

    printer.Print(api)