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/**************************************************************************
Copyright 2004 Tungsten Graphics Inc., Cedar Park, Texas.
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
ATI, TUNGSTEN GRAPHICS AND/OR THEIR 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:
* Keith Whitwell <keith@tungstengraphics.com>
*/
#if !defined (__DJGPP__) && !defined (__MINGW32__)
#define GLOBL( x ) \
.globl x; \
x:
#else /* defined(__DJGPP__) */
#define GLOBL( x ) \
.globl _##x; \
_##x:
#endif /* defined(__DJGPP__) */
.data
.align 4
// Someone who knew a lot about this sort of thing would use this
// macro to note current offsets, etc in a special region of the
// object file & just make everything work out neat. I don't know
// enough to do that...
#define SUBST( x ) (0x10101010 + x)
// [dBorca] TODO
// Unfold functions for each vertex size?
// Build super-specialized SSE versions?
// STDCALL woes (HAVE_NONSTANDARD_GLAPIENTRY):
// need separate routine for the non "fv" case,
// to clean up the stack!
GLOBL ( _tnl_x86_Vertex1fv )
movl 4(%esp), %ecx
push %edi
push %esi
movl SUBST(0), %edi // 0x0 --> tnl->vtx.vbptr
movl (%ecx), %edx // load v[0]
movl %edx, (%edi) // tnl->vtx.vbptr[0] = v[0]
addl $4, %edi // tnl->vtx.vbptr += 1
movl $SUBST(1), %ecx // 0x1 --> (tnl->vtx.vertex_size - 1)
movl $SUBST(2), %esi // 0x2 --> (tnl->vtx.vertex + 1)
repz
movsl %ds:(%esi), %es:(%edi)
movl %edi, SUBST(0) // 0x0 --> tnl->vtx.vbptr
movl SUBST(3), %edx // 0x3 --> counter
pop %esi
pop %edi
dec %edx // counter--
movl %edx, SUBST(3) // 0x3 --> counter
jne .0 // if (counter != 0) return
pushl $SUBST(4) // 0x4 --> ctx
.byte 0xe8 // call ...
.long SUBST(5) // ... _tnl_wrap_filled_vertex(ctx)
pop %eax
.0:
ret // return
GLOBL ( _tnl_x86_Vertex1fv_end )
.align 4
GLOBL ( _tnl_x86_Vertex2fv )
movl 4(%esp), %ecx
push %edi
push %esi
movl SUBST(0), %edi // load tnl->vtx.vbptr
movl (%ecx), %edx // load v[0]
movl 4(%ecx), %eax // load v[1]
movl %edx, (%edi) // tnl->vtx.vbptr[0] = v[0]
movl %eax, 4(%edi) // tnl->vtx.vbptr[1] = v[1]
addl $8, %edi // tnl->vtx.vbptr += 2
movl $SUBST(1), %ecx // vertex_size - 2
movl $SUBST(2), %esi // tnl->vtx.vertex + 2
repz
movsl %ds:(%esi), %es:(%edi)
movl %edi, SUBST(0) // save tnl->vtx.vbptr
movl SUBST(3), %edx // load counter
pop %esi
pop %edi
dec %edx // counter--
movl %edx, SUBST(3) // save counter
jne .1 // if (counter != 0) return
pushl $SUBST(4) // load ctx
.byte 0xe8 // call ...
.long SUBST(5) // ... _tnl_wrap_filled_vertex(ctx)
pop %eax
.1:
ret // return
GLOBL ( _tnl_x86_Vertex2fv_end )
.align 4
GLOBL ( _tnl_x86_Vertex3fv )
movl 4(%esp), %ecx
push %edi
push %esi
movl SUBST(0), %edi // load tnl->vtx.vbptr
movl (%ecx), %edx // load v[0]
movl 4(%ecx), %eax // load v[1]
movl 8(%ecx), %esi // load v[2]
movl %edx, (%edi) // tnl->vtx.vbptr[0] = v[0]
movl %eax, 4(%edi) // tnl->vtx.vbptr[1] = v[1]
movl %esi, 8(%edi) // tnl->vtx.vbptr[2] = v[2]
addl $12, %edi // tnl->vtx.vbptr += 3
movl $SUBST(1), %ecx // vertex_size - 3
movl $SUBST(2), %esi // tnl->vtx.vertex + 3
repz
movsl %ds:(%esi), %es:(%edi)
movl %edi, SUBST(0) // save tnl->vtx.vbptr
movl SUBST(3), %edx // load counter
pop %esi
pop %edi
dec %edx // counter--
movl %edx, SUBST(3) // save counter
jne .2 // if (counter != 0) return
pushl $SUBST(4) // load ctx
.byte 0xe8 // call ...
.long SUBST(5) // ... _tnl_wrap_filled_vertex(ctx)
pop %eax
.2:
ret // return
GLOBL ( _tnl_x86_Vertex3fv_end )
.align 4
GLOBL ( _tnl_x86_Vertex4fv )
movl 4(%esp), %ecx
push %edi
push %esi
movl SUBST(0), %edi // load tnl->vtx.vbptr
movl (%ecx), %edx // load v[0]
movl 4(%ecx), %eax // load v[1]
movl 8(%ecx), %esi // load v[2]
movl 12(%ecx), %ecx // load v[3]
movl %edx, (%edi) // tnl->vtx.vbptr[0] = v[0]
movl %eax, 4(%edi) // tnl->vtx.vbptr[1] = v[1]
movl %esi, 8(%edi) // tnl->vtx.vbptr[2] = v[2]
movl %ecx, 12(%edi) // tnl->vtx.vbptr[3] = v[3]
addl $16, %edi // tnl->vtx.vbptr += 4
movl $SUBST(1), %ecx // vertex_size - 4
movl $SUBST(2), %esi // tnl->vtx.vertex + 3
repz
movsl %ds:(%esi), %es:(%edi)
movl %edi, SUBST(0) // save tnl->vtx.vbptr
movl SUBST(3), %edx // load counter
pop %esi
pop %edi
dec %edx // counter--
movl %edx, SUBST(3) // save counter
jne .3 // if (counter != 0) return
pushl $SUBST(4) // load ctx
.byte 0xe8 // call ...
.long SUBST(5) // ... _tnl_wrap_filled_vertex(ctx)
pop %eax
.3:
ret // return
GLOBL ( _tnl_x86_Vertex4fv_end )
/**
* Generic handlers for vector format data.
*/
GLOBL( _tnl_x86_Attribute1fv)
movl 4(%esp), %ecx
movl (%ecx), %eax /* load v[0] */
movl %eax, SUBST(0) /* store v[0] to current vertex */
ret
GLOBL ( _tnl_x86_Attribute1fv_end )
GLOBL( _tnl_x86_Attribute2fv)
movl 4(%esp), %ecx
movl (%ecx), %eax /* load v[0] */
movl 4(%ecx), %edx /* load v[1] */
movl %eax, SUBST(0) /* store v[0] to current vertex */
movl %edx, SUBST(1) /* store v[1] to current vertex */
ret
GLOBL ( _tnl_x86_Attribute2fv_end )
GLOBL( _tnl_x86_Attribute3fv)
movl 4(%esp), %ecx
movl (%ecx), %eax /* load v[0] */
movl 4(%ecx), %edx /* load v[1] */
movl 8(%ecx), %ecx /* load v[2] */
movl %eax, SUBST(0) /* store v[0] to current vertex */
movl %edx, SUBST(1) /* store v[1] to current vertex */
movl %ecx, SUBST(2) /* store v[2] to current vertex */
ret
GLOBL ( _tnl_x86_Attribute3fv_end )
GLOBL( _tnl_x86_Attribute4fv)
movl 4(%esp), %ecx
movl (%ecx), %eax /* load v[0] */
movl 4(%ecx), %edx /* load v[1] */
movl %eax, SUBST(0) /* store v[0] to current vertex */
movl %edx, SUBST(1) /* store v[1] to current vertex */
movl 8(%ecx), %eax /* load v[2] */
movl 12(%ecx), %edx /* load v[3] */
movl %eax, SUBST(2) /* store v[2] to current vertex */
movl %edx, SUBST(3) /* store v[3] to current vertex */
ret
GLOBL ( _tnl_x86_Attribute4fv_end )
// Choosers:
// Must generate all of these ahead of first usage. Generate at
// compile-time?
GLOBL( _tnl_x86_choose_fv)
subl $12, %esp // gcc does 16 byte alignment of stack frames?
movl $SUBST(0), (%esp) // arg 0 - attrib
movl $SUBST(1), 4(%esp) // arg 1 - N
.byte 0xe8 // call ...
.long SUBST(2) // ... do_choose
add $12, %esp // tear down stack frame
jmp *%eax // jump to new func
GLOBL ( _tnl_x86_choose_fv_end )
// FIRST LEVEL FUNCTIONS -- these are plugged directly into GL dispatch.
// In the 1st level dispatch functions, switch to a different
// calling convention -- (const GLfloat *v) in %ecx.
//
// As with regular (x86) dispatch, don't create a new stack frame -
// just let the 'ret' in the dispatched function return straight
// back to the original caller.
// Vertex/Normal/Color, etc: the address of the function pointer
// is known at codegen time.
// Unfortunately, have to play with the stack in the non-fv case:
//
GLOBL( _tnl_x86_dispatch_attrf )
subl $12, %esp // gcc does 16 byte alignment of stack frames?
leal 16(%esp), %edx // address of first float on stack
movl %edx, (%esp) // save as 'v'
call *SUBST(0) // 0x0 --> tabfv[attr][n]
addl $12, %esp // tear down frame
ret // return
GLOBL( _tnl_x86_dispatch_attrf_end )
// The fv case is simpler:
//
GLOBL( _tnl_x86_dispatch_attrfv )
jmp *SUBST(0) // 0x0 --> tabfv[attr][n]
GLOBL( _tnl_x86_dispatch_attrfv_end )
// MultiTexcoord: the address of the function pointer must be
// calculated, but can use the index argument slot to hold 'v', and
// avoid setting up a new stack frame.
//
// [dBorca]
// right, this would be the preferred approach, but gcc does not
// clean up the stack after each function call when optimizing (-fdefer-pop);
// can it make assumptions about what's already on the stack? I dunno,
// but in this case, we can't mess with the caller's stack frame, and
// we must use a model like `_x86_dispatch_attrfv' above. Caveat emptor!
// Also, will only need a maximum of four of each of these per context:
//
GLOBL( _tnl_x86_dispatch_multitexcoordf )
movl 4(%esp), %ecx
leal 8(%esp), %edx
andl $7, %ecx
movl %edx, 4(%esp)
sall $4, %ecx
jmp *SUBST(0)(%ecx) // 0x0 - tabfv[tex0][n]
GLOBL( _tnl_x86_dispatch_multitexcoordf_end )
GLOBL( _tnl_x86_dispatch_multitexcoordfv )
movl 4(%esp), %ecx
movl 8(%esp), %edx
andl $7, %ecx
movl %edx, 4(%esp)
sall $4, %ecx
jmp *SUBST(0)(%ecx) // 0x0 - tabfv[tex0][n]
GLOBL( _tnl_x86_dispatch_multitexcoordfv_end )
// VertexAttrib: the address of the function pointer must be
// calculated.
GLOBL( _tnl_x86_dispatch_vertexattribf )
movl 4(%esp), %eax
cmpl $16, %eax
jb .8 // "cmovge" is not supported on all CPUs
movl $16, %eax
.8:
leal 8(%esp), %ecx // calculate 'v'
movl %ecx, 4(%esp) // save in 1st arg slot
sall $4, %eax
jmp *SUBST(0)(%eax) // 0x0 - tabfv[0][n]
GLOBL( _tnl_x86_dispatch_vertexattribf_end )
GLOBL( _tnl_x86_dispatch_vertexattribfv )
movl 4(%esp), %eax
cmpl $16, %eax
jb .9 // "cmovge" is not supported on all CPUs
movl $16, %eax
.9:
movl 8(%esp), %ecx // load 'v'
movl %ecx, 4(%esp) // save in 1st arg slot
sall $4, %eax
jmp *SUBST(0)(%eax) // 0x0 - tabfv[0][n]
GLOBL( _tnl_x86_dispatch_vertexattribfv_end )
|