diff options
Diffstat (limited to 'mesalib/src/mapi/glapi/gen/gl_x86-64_asm.py')
| -rw-r--r-- | mesalib/src/mapi/glapi/gen/gl_x86-64_asm.py | 334 |
1 files changed, 334 insertions, 0 deletions
diff --git a/mesalib/src/mapi/glapi/gen/gl_x86-64_asm.py b/mesalib/src/mapi/glapi/gen/gl_x86-64_asm.py new file mode 100644 index 000000000..e6e78c42f --- /dev/null +++ b/mesalib/src/mapi/glapi/gen/gl_x86-64_asm.py @@ -0,0 +1,334 @@ +#!/usr/bin/env python + +# (C) Copyright IBM Corporation 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 <idr@us.ibm.com> + +import license +import gl_XML, glX_XML +import sys, getopt, copy + +def should_use_push(registers): + for [reg, offset] in registers: + if reg[1:4] == "xmm": + return 0 + + N = len(registers) + return (N & 1) != 0 + + +def local_size(registers): + # The x86-64 ABI says "the value (%rsp - 8) is always a multiple of + # 16 when control is transfered to the function entry point." This + # means that the local stack usage must be (16*N)+8 for some value + # of N. (16*N)+8 = (8*(2N))+8 = 8*(2N+1). As long as N is odd, we + # meet this requirement. + + N = (len(registers) | 1) + return 8*N + + +def save_all_regs(registers): + adjust_stack = 0 + if not should_use_push(registers): + adjust_stack = local_size(registers) + print '\tsubq\t$%u, %%rsp' % (adjust_stack) + + for [reg, stack_offset] in registers: + save_reg( reg, stack_offset, adjust_stack ) + return + + +def restore_all_regs(registers): + adjust_stack = 0 + if not should_use_push(registers): + adjust_stack = local_size(registers) + + temp = copy.deepcopy(registers) + while len(temp): + [reg, stack_offset] = temp.pop() + restore_reg(reg, stack_offset, adjust_stack) + + if adjust_stack: + print '\taddq\t$%u, %%rsp' % (adjust_stack) + return + + +def save_reg(reg, offset, use_move): + if use_move: + if offset == 0: + print '\tmovq\t%s, (%%rsp)' % (reg) + else: + print '\tmovq\t%s, %u(%%rsp)' % (reg, offset) + else: + print '\tpushq\t%s' % (reg) + + return + + +def restore_reg(reg, offset, use_move): + if use_move: + if offset == 0: + print '\tmovq\t(%%rsp), %s' % (reg) + else: + print '\tmovq\t%u(%%rsp), %s' % (offset, reg) + else: + print '\tpopq\t%s' % (reg) + + return + + +class PrintGenericStubs(gl_XML.gl_print_base): + + def __init__(self): + gl_XML.gl_print_base.__init__(self) + + self.name = "gl_x86-64_asm.py (from Mesa)" + self.license = license.bsd_license_template % ("(C) Copyright IBM Corporation 2005", "IBM") + return + + + def get_stack_size(self, f): + size = 0 + for p in f.parameterIterator(): + size += p.get_stack_size() + + return size + + + def printRealHeader(self): + print "/* If we build with gcc's -fvisibility=hidden flag, we'll need to change" + print " * the symbol visibility mode to 'default'." + print ' */' + print '' + print '#include "x86/assyntax.h"' + print '' + print '#ifdef __GNUC__' + print '# pragma GCC visibility push(default)' + print '# define HIDDEN(x) .hidden x' + print '#else' + print '# define HIDDEN(x)' + print '#endif' + print '' + print '# if defined(USE_MGL_NAMESPACE)' + print '# define GL_PREFIX(n) GLNAME(CONCAT(mgl,n))' + print '# define _glapi_Dispatch _mglapi_Dispatch' + print '# else' + print '# define GL_PREFIX(n) GLNAME(CONCAT(gl,n))' + print '# endif' + print '' + print '#if defined(PTHREADS) || defined(WIN32_THREADS) || defined(BEOS_THREADS)' + print '# define THREADS' + print '#endif' + print '' + print '\t.text' + print '' + print '#ifdef GLX_USE_TLS' + print '' + print '\t.globl _x86_64_get_get_dispatch; HIDDEN(_x86_64_get_get_dispatch)' + print '_x86_64_get_get_dispatch:' + print '\tlea\t_x86_64_get_dispatch(%rip), %rax' + print '\tret' + print '' + print '\t.p2align\t4,,15' + print '_x86_64_get_dispatch:' + print '\tmovq\t_glapi_tls_Dispatch@GOTTPOFF(%rip), %rax' + print '\tmovq\t%fs:(%rax), %rax' + print '\tret' + print '\t.size\t_x86_64_get_dispatch, .-_x86_64_get_dispatch' + print '' + print '#elif defined(PTHREADS)' + print '' + print '\t.extern\t_glapi_Dispatch' + print '\t.extern\t_gl_DispatchTSD' + print '\t.extern\tpthread_getspecific' + print '' + print '\t.p2align\t4,,15' + print '_x86_64_get_dispatch:' + print '\tmovq\t_gl_DispatchTSD(%rip), %rdi' + print '\tjmp\tpthread_getspecific@PLT' + print '' + print '#elif defined(THREADS)' + print '' + print '\t.extern\t_glapi_get_dispatch' + print '' + print '#endif' + print '' + return + + + def printRealFooter(self): + print '' + print '#if defined(GLX_USE_TLS) && defined(__linux__)' + print ' .section ".note.ABI-tag", "a"' + print ' .p2align 2' + print ' .long 1f - 0f /* name length */' + print ' .long 3f - 2f /* data length */' + print ' .long 1 /* note length */' + print '0: .asciz "GNU" /* vendor name */' + print '1: .p2align 2' + print '2: .long 0 /* note data: the ABI tag */' + print ' .long 2,4,20 /* Minimum kernel version w/TLS */' + print '3: .p2align 2 /* pad out section */' + print '#endif /* GLX_USE_TLS */' + print '' + print '#if defined (__ELF__) && defined (__linux__)' + print ' .section .note.GNU-stack,"",%progbits' + print '#endif' + return + + + def printFunction(self, f): + + # The x86-64 ABI divides function parameters into a couple + # classes. For the OpenGL interface, the only ones that are + # relevent are INTEGER and SSE. Basically, the first 8 + # GLfloat or GLdouble parameters are placed in %xmm0 - %xmm7, + # the first 6 non-GLfloat / non-GLdouble parameters are placed + # in registers listed in int_parameters. + # + # If more parameters than that are required, they are passed + # on the stack. Therefore, we just have to make sure that + # %esp hasn't changed when we jump to the actual function. + # Since we're jumping to the function (and not calling it), we + # have to make sure of that anyway! + + int_parameters = ["%rdi", "%rsi", "%rdx", "%rcx", "%r8", "%r9"] + + int_class = 0 + sse_class = 0 + stack_offset = 0 + registers = [] + for p in f.parameterIterator(): + type_name = p.get_base_type_string() + + if p.is_pointer() or (type_name != "GLfloat" and type_name != "GLdouble"): + if int_class < 6: + registers.append( [int_parameters[int_class], stack_offset] ) + int_class += 1 + stack_offset += 8 + else: + if sse_class < 8: + registers.append( ["%%xmm%u" % (sse_class), stack_offset] ) + sse_class += 1 + stack_offset += 8 + + if ((int_class & 1) == 0) and (sse_class == 0): + registers.append( ["%rbp", 0] ) + + + name = f.dispatch_name() + + print '\t.p2align\t4,,15' + print '\t.globl\tGL_PREFIX(%s)' % (name) + print '\t.type\tGL_PREFIX(%s), @function' % (name) + if not f.is_static_entry_point(f.name): + print '\tHIDDEN(GL_PREFIX(%s))' % (name) + print 'GL_PREFIX(%s):' % (name) + print '#if defined(GLX_USE_TLS)' + print '\tcall\t_x86_64_get_dispatch@PLT' + print '\tmovq\t%u(%%rax), %%r11' % (f.offset * 8) + print '\tjmp\t*%r11' + print '#elif defined(PTHREADS)' + + save_all_regs(registers) + print '\tcall\t_x86_64_get_dispatch@PLT' + restore_all_regs(registers) + + if f.offset == 0: + print '\tmovq\t(%rax), %r11' + else: + print '\tmovq\t%u(%%rax), %%r11' % (f.offset * 8) + + print '\tjmp\t*%r11' + + print '#else' + print '\tmovq\t_glapi_Dispatch(%rip), %rax' + print '\ttestq\t%rax, %rax' + print '\tje\t1f' + print '\tmovq\t%u(%%rax), %%r11' % (f.offset * 8) + print '\tjmp\t*%r11' + print '1:' + + save_all_regs(registers) + print '\tcall\t_glapi_get_dispatch' + restore_all_regs(registers) + + print '\tmovq\t%u(%%rax), %%r11' % (f.offset * 8) + print '\tjmp\t*%r11' + print '#endif /* defined(GLX_USE_TLS) */' + + print '\t.size\tGL_PREFIX(%s), .-GL_PREFIX(%s)' % (name, name) + print '' + return + + + def printBody(self, api): + for f in api.functionIterateByOffset(): + self.printFunction(f) + + + for f in api.functionIterateByOffset(): + dispatch = f.dispatch_name() + for n in f.entry_points: + if n != f.name: + if f.is_static_entry_point(n): + text = '\t.globl GL_PREFIX(%s) ; .set GL_PREFIX(%s), GL_PREFIX(%s)' % (n, n, dispatch) + + 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) |