/* $Id: x86_cliptest.S,v 1.12 2006/04/17 18:58:24 krh Exp $ */
/*
* Mesa 3-D graphics library
* Version: 3.5
*
* 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.
*/
/*
* NOTE: Avoid using spaces in between '(' ')' and arguments, especially
* with macros like CONST, LLBL that expand to CONCAT(...). Putting spaces
* in there will break the build on some platforms.
*/
#include "matypes.h"
#include "clip_args.h"
#define SRC0 REGOFF(0, ESI)
#define SRC1 REGOFF(4, ESI)
#define SRC2 REGOFF(8, ESI)
#define SRC3 REGOFF(12, ESI)
#define DST0 REGOFF(0, EDI)
#define DST1 REGOFF(4, EDI)
#define DST2 REGOFF(8, EDI)
#define DST3 REGOFF(12, EDI)
#define MAT0 REGOFF(0, EDX)
#define MAT1 REGOFF(4, EDX)
#define MAT2 REGOFF(8, EDX)
#define MAT3 REGOFF(12, EDX)
/*
* Table for clip test.
*
* bit6 = SRC3 < 0
* bit5 = SRC2 < 0
* bit4 = abs(S(2)) > abs(S(3))
* bit3 = SRC1 < 0
* bit2 = abs(S(1)) > abs(S(3))
* bit1 = SRC0 < 0
* bit0 = abs(S(0)) > abs(S(3))
*/
SEG_DATA
clip_table:
D_BYTE 0x00, 0x01, 0x00, 0x02, 0x04, 0x05, 0x04, 0x06
D_BYTE 0x00, 0x01, 0x00, 0x02, 0x08, 0x09, 0x08, 0x0a
D_BYTE 0x20, 0x21, 0x20, 0x22, 0x24, 0x25, 0x24, 0x26
D_BYTE 0x20, 0x21, 0x20, 0x22, 0x28, 0x29, 0x28, 0x2a
D_BYTE 0x00, 0x01, 0x00, 0x02, 0x04, 0x05, 0x04, 0x06
D_BYTE 0x00, 0x01, 0x00, 0x02, 0x08, 0x09, 0x08, 0x0a
D_BYTE 0x10, 0x11, 0x10, 0x12, 0x14, 0x15, 0x14, 0x16
D_BYTE 0x10, 0x11, 0x10, 0x12, 0x18, 0x19, 0x18, 0x1a
D_BYTE 0x3f, 0x3d, 0x3f, 0x3e, 0x37, 0x35, 0x37, 0x36
D_BYTE 0x3f, 0x3d, 0x3f, 0x3e, 0x3b, 0x39, 0x3b, 0x3a
D_BYTE 0x2f, 0x2d, 0x2f, 0x2e, 0x27, 0x25, 0x27, 0x26
D_BYTE 0x2f, 0x2d, 0x2f, 0x2e, 0x2b, 0x29, 0x2b, 0x2a
D_BYTE 0x3f, 0x3d, 0x3f, 0x3e, 0x37, 0x35, 0x37, 0x36
D_BYTE 0x3f, 0x3d, 0x3f, 0x3e, 0x3b, 0x39, 0x3b, 0x3a
D_BYTE 0x1f, 0x1d, 0x1f, 0x1e, 0x17, 0x15, 0x17, 0x16
D_BYTE 0x1f, 0x1d, 0x1f, 0x1e, 0x1b, 0x19, 0x1b, 0x1a
SEG_TEXT
/*
* _mesa_x86_cliptest_points4
*
* AL: ormask
* AH: andmask
* EBX: temp0
* ECX: temp1
* EDX: clipmask[]
* ESI: clip[]
* EDI: proj[]
* EBP: temp2
*/
#if defined(__ELF__) && defined(__PIC__) && defined(GNU_ASSEMBLER) && !defined(ELFPIC)
#define ELFPIC
#endif
ALIGNTEXT16
GLOBL GLNAME( _mesa_x86_cliptest_points4 )
HIDDEN(_mesa_x86_cliptest_points4)
GLNAME( _mesa_x86_cliptest_points4 ):
#ifdef ELFPIC
#define FRAME_OFFSET 20
#else
#define FRAME_OFFSET 16
#endif
PUSH_L( ESI )
PUSH_L( EDI )
PUSH_L( EBP )
PUSH_L( EBX )
#ifdef ELFPIC
/* store pointer to clip_table on stack */
CALL( LLBL(ctp4_get_eip) )
ADD_L( CONST(_GLOBAL_OFFSET_TABLE_), EBX )
MOV_L( REGOFF(clip_table@GOT, EBX), EBX )
PUSH_L( EBX )
JMP( LLBL(ctp4_clip_table_ready) )
LLBL(ctp4_get_eip):
/* store eip in ebx */
MOV_L( REGIND(ESP), EBX )
RET
LLBL(ctp4_clip_table_ready):
#endif
MOV_L( ARG_SOURCE, ESI )
MOV_L( ARG_DEST, EDI )
MOV_L( ARG_CLIP, EDX )
MOV_L( ARG_OR, EBX )
MOV_L( ARG_AND, EBP )
MOV_L( REGOFF(V4F_STRIDE, ESI), EAX )
MOV_L( REGOFF(V4F_COUNT, ESI), ECX )
MOV_L( REGOFF(V4F_START, ESI), ESI )
OR_L( CONST(VEC_SIZE_4), REGOFF(V4F_FLAGS, EDI) )
MOV_L( EAX, ARG_SOURCE ) /* put stride in ARG_SOURCE */
MOV_L( CONST(4), REGOFF(V4F_SIZE, EDI) )
MOV_L( ECX, REGOFF(V4F_COUNT, EDI) )
MOV_L( REGOFF(V4F_START, EDI), EDI )
ADD_L( EDX, ECX )
MOV_L( ECX, ARG_CLIP ) /* put clipmask + count in ARG_CLIP */
CMP_L( ECX, EDX )
MOV_B( REGIND(EBX), AL )
MOV_B( REGIND(EBP), AH )
JZ( LLBL(ctp4_finish) )
ALIGNTEXT16
LLBL(ctp4_top):
FLD1 /* F3 */
FDIV_S( SRC3 ) /* GH: don't care about div-by-zero */
MOV_L( SRC3, EBP )
MOV_L( SRC2, EBX )
XOR_L( ECX, ECX )
ADD_L( EBP, EBP ) /* ebp = abs(S(3))*2 ADC_L( ECX, ECX )
ADD_L( EBX, EBX ) /* ebx = abs(S(2))*2 ADC_L( ECX, ECX )
CMP_L( EBX, EBP ) /* carry = abs(S(2))*2 > abs(S(3))*2 */
ADC_L( ECX, ECX )
MOV_L( SRC1, EBX )
ADD_L( EBX, EBX ) /* ebx = abs(S(1))*2 ADC_L( ECX, ECX )
CMP_L( EBX, EBP ) /* carry = abs(S(1))*2 > abs(S(3))*2 */
ADC_L( ECX, ECX )
MOV_L( SRC0, EBX )
ADD_L( EBX, EBX ) /* ebx = abs(S(0))*2 ADC_L( ECX, ECX )
CMP_L( EBX, EBP ) /* carry = abs(S(0))*2 > abs(S(3))*2 */
ADC_L( ECX, ECX )
#ifdef ELFPIC
MOV_L( REGIND(ESP), EBP ) /* clip_table */
MOV_B( REGBI(EBP, ECX), CL )
#else
MOV_B( REGOFF(clip_table,ECX), CL )
#endif
OR_B( CL, AL )
AND_B( CL, AH )
TEST_B( CL, CL )
MOV_B( CL, REGIND(EDX) )
JZ( LLBL(ctp4_proj) )
LLBL(ctp4_noproj):
FSTP( ST(0) ) /* */
MOV_L( CONST(0), DST0 )
MOV_L( CONST(0), DST1 )
MOV_L( CONST(0), DST2 )
MOV_L( CONST(0x3f800000), DST3 )
JMP( LLBL(ctp4_next) )
LLBL(ctp4_proj):
FLD_S( SRC0 ) /* F0 F3 */
FMUL2( ST(1), ST0 )
FLD_S( SRC1 ) /* F1 F0 F3 */
FMUL2( ST(2), ST0 )
FLD_S( SRC2 ) /* F2 F1 F0 F3 */
FMUL2( ST(3), ST0 )
FXCH( ST(2) ) /* F0 F1 F2 F3 */
FSTP_S( DST0 ) /* F1 F2 F3 */
FSTP_S( DST1 ) /* F2 F3 */
FSTP_S( DST2 ) /* F3 */
FSTP_S( DST3 ) /* */
LLBL(ctp4_next):
INC_L( EDX )
ADD_L( CONST(16), EDI )
ADD_L( ARG_SOURCE, ESI )
CMP_L( EDX, ARG_CLIP )
JNZ( LLBL(ctp4_top) )
MOV_L( ARG_OR, ECX )
MOV_L( ARG_AND, EDX )
MOV_B( AL, REGIND(ECX) )
MOV_B( AH, REGIND(EDX) )
LLBL(ctp4_finish):
MOV_L( ARG_DEST, EAX )
#ifdef ELFPIC
POP_L( ESI ) /* discard ptr to clip_table */
#endif
POP_L( EBX )
POP_L( EBP )
POP_L( EDI )
POP_L( ESI )
RET
ALIGNTEXT16
GLOBL GLNAME( _mesa_x86_cliptest_points4_np )
HIDDEN(_mesa_x86_cliptest_points4_np)
GLNAME( _mesa_x86_cliptest_points4_np ):
#ifdef ELFPIC
#define FRAME_OFFSET 20
#else
#define FRAME_OFFSET 16
#endif
PUSH_L( ESI )
PUSH_L( EDI )
PUSH_L( EBP )
PUSH_L( EBX )
#ifdef ELFPIC
/* store pointer to clip_table on stack */
CALL( LLBL(ctp4_np_get_eip) )
ADD_L( CONST(_GLOBAL_OFFSET_TABLE_), EBX )
MOV_L( REGOFF(clip_table@GOT, EBX), EBX )
PUSH_L( EBX )
JMP( LLBL(ctp4_np_clip_table_ready) )
LLBL(ctp4_np_get_eip):
/* store eip in ebx */
MOV_L( REGIND(ESP), EBX )
RET
LLBL(ctp4_np_clip_table_ready):
#endif
MOV_L( ARG_SOURCE, ESI )
/* slot */
MOV_L( ARG_CLIP, EDX )
MOV_L( ARG_OR, EBX )
MOV_L( ARG_AND, EBP )
MOV_L( REGOFF(V4F_STRIDE, ESI), EAX )
MOV_L( REGOFF(V4F_COUNT, ESI), ECX )
MOV_L( REGOFF(V4F_START, ESI), ESI )
MOV_L( EAX, ARG_DEST ) /* put stride in ARG_DEST */
ADD_L( EDX, ECX )
MOV_L( ECX, EDI ) /* put clipmask + count in EDI */
CMP_L( ECX, EDX )
MOV_B( REGIND(EBX), AL )
MOV_B( REGIND(EBP), AH )
JZ( LLBL(ctp4_np_finish) )
ALIGNTEXT16
LLBL(ctp4_np_top):
MOV_L( SRC3, EBP )
MOV_L( SRC2, EBX )
XOR_L( ECX, ECX )
ADD_L( EBP, EBP ) /* ebp = abs(S(3))*2 ADC_L( ECX, ECX )
ADD_L( EBX, EBX ) /* ebx = abs(S(2))*2 ADC_L( ECX, ECX )
CMP_L( EBX, EBP ) /* carry = abs(S(2))*2 > abs(S(3))*2 */
ADC_L( ECX, ECX )
MOV_L( SRC1, EBX )
ADD_L( EBX, EBX ) /* ebx = abs(S(1))*2 ADC_L( ECX, ECX )
CMP_L( EBX, EBP ) /* carry = abs(S(1))*2 > abs(S(3))*2 */
ADC_L( ECX, ECX )
MOV_L( SRC0, EBX )
ADD_L( EBX, EBX ) /* ebx = abs(S(0))*2 ADC_L( ECX, ECX )
CMP_L( EBX, EBP ) /* carry = abs(S(0))*2 > abs(S(3))*2 */
ADC_L( ECX, ECX )
#ifdef ELFPIC
MOV_L( REGIND(ESP), EBP ) /* clip_table */
MOV_B( REGBI(EBP, ECX), CL )
#else
MOV_B( REGOFF(clip_table,ECX), CL )
#endif
OR_B( CL, AL )
AND_B( CL, AH )
TEST_B( CL, CL )
MOV_B( CL, REGIND(EDX) )
INC_L( EDX )
/* slot */
ADD_L( ARG_DEST, ESI )
CMP_L( EDX, EDI )
JNZ( LLBL(ctp4_np_top) )
MOV_L( ARG_OR, ECX )
MOV_L( ARG_AND, EDX )
MOV_B( AL, REGIND(ECX) )
MOV_B( AH, REGIND(EDX) )
LLBL(ctp4_np_finish):
MOV_L( ARG_SOURCE, EAX )
#ifdef ELFPIC
POP_L( ESI ) /* discard ptr to clip_table */
#endif
POP_L( EBX )
POP_L( EBP )
POP_L( EDI )
POP_L( ESI )
RET
#if defined (__ELF__) && defined (__linux__)
.section .note.GNU-stack,"",%progbits
#endif