generate X86 dispatch code

diff --git a/src/mesa/glapi/glx86asm.py b/src/mesa/glapi/glx86asm.py
new file mode 100644 (file)
index 0000000..2e546c4
--- /dev/null
+++ b/src/mesa/glapi/glx86asm.py
@@ -0,0 +1,150 @@
+#!/usr/bin/env python
+
+# $Id: glx86asm.py,v 1.1 2000/05/11 23:14:57 brianp Exp $
+
+# Mesa 3-D graphics library
+# Version:  3.3
+# 
+# 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(mgl ## n)'
+       print '#else'
+       print '#define GL_PREFIX(n) GLNAME(gl ## n)'
+       print '#endif'
+       print ''
+       print '#define GL_OFFSET(x) CODEPTR(REGOFF(4 * x, EAX))'
+       print ''
+       print '#ifdef GNU_ASSEMBLER'
+       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 '\tTEST_L(EAX, EAX)'
+       print "\tJZ(GLNAME(_glapi_fallback_%s))" % (name)
+       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()