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/*
* Mesa 3-D graphics library
* Version: 3.1
*
* Copyright (C) 1999 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.
*/
/*
* Check extended CPU capabilities.
*
* Written by Holger Waechtler <holger@akaflieg.extern.tu-berlin.de>
*/
#include "assyntax.h"
SEG_TEXT
#if !defined(NASM_ASSEMBLER) && !defined(MASM_ASSEMBLER)
#define LLBL(a) .L ## a
#else
#define LLBL(a) a
#endif
#define GL_CPU_GenuineIntel CONST(1)
#define GL_CPU_MMX CONST(2)
#define GL_CPU_3Dnow CONST(4)
#define GL_CPU_Katmai CONST(8)
GLOBL GLNAME(gl_identify_x86_cpu_features)
ALIGNTEXT4
GLNAME(gl_identify_x86_cpu_features):
PUSH_L ( EBX )
PUSH_L ( ESI )
XOR_L ( ESI, ESI )
PUSHF_L /* test for the cpuid command */
POP_L ( EAX ) /* (if the ID-Bit (Bit 21) in */
MOV_L ( EAX, EBX ) /* EEFLAGS is writable, the */
XOR_L ( CONST(0x00200000), EAX ) /* cpuid command is present) */
PUSH_L ( EAX )
POPF_L
PUSHF_L
POP_L ( EAX )
CMP_L ( EBX, EAX )
JZ ( LLBL ( Gidcpu_end ) ) /* cpuid command not supported */
XOR_L ( EAX, EAX )
CPUID
LLBL (Gidcpu_intel):
CMP_L ( CONST(0x756e6547), EBX ) /* compare */
JNE ( LLBL ( Gidcpu_amd ) ) /* vendor string == 'GenuineIntel' ? */
CMP_L ( CONST(0x49656e69), EDX )
JNE ( LLBL ( Gidcpu_amd ) )
CMP_L ( CONST(0x6c65746e), ECX )
JNE ( LLBL ( Gidcpu_amd ) )
OR_L ( GL_CPU_GenuineIntel, ESI )
JMP ( LLBL ( Gidcpu_katmai ) )
LLBL ( Gidcpu_amd ):
CMP_L ( CONST(0x68747541), EBX ) /* compare vendor string == 'Auth'? */
JNE ( LLBL ( Gidcpu_other ) )
CMP_L ( CONST(0x69746e65), EDX ) /* 'enti' */
JNE ( LLBL ( Gidcpu_other ) )
CMP_L ( CONST(0x444d4163), ECX ) /* 'cAMD' (= 'AuthenticAMD') */
JE ( LLBL ( Gidcpu_3dnow ) )
LLBL ( Gidcpu_other ):
/* insert here other vendorstrings with 3dnow capable cpu vendors */
JMP ( LLBL ( Gidcpu_mmx ) )
LLBL ( Gidcpu_katmai ):
MOV_L ( CONST(0x1), EAX )
CPUID /* test for Katmai */
TEST_L ( CONST(0x002000000), EDX ) /* is Bit 25 set ? */
JZ ( LLBL ( Gidcpu_mmx ) ) /* streaming SIMD-extensions not found... */
OR_L ( GL_CPU_Katmai, ESI ) /* Katmai detected ! :) */
JMP ( LLBL ( Gidcpu_mmx ) ) /* check for mmx */
LLBL ( Gidcpu_3dnow ):
MOV_L ( CONST(0x80000000), EAX ) /* extended functions supported ? */
CPUID
TEST_L ( EAX, EAX )
JZ ( LLBL ( Gidcpu_end ) )
MOV_L ( CONST(0x80000001), EAX )
CPUID /* test for 3Dnow! */
TEST_L ( CONST(0x80000000), EDX )
JZ ( LLBL ( Gidcpu_mmx ) )
OR_L ( GL_CPU_3Dnow, ESI ) /* (detected 3Dnow! extension) */
LLBL ( Gidcpu_mmx ):
MOV_L ( CONST(0x1), EAX )
CPUID
TEST_L ( CONST(0x00800000), EDX ) /* Bit 23 set ? */
JZ ( LLBL ( Gidcpu_end ) )
OR_L ( GL_CPU_MMX, ESI ) /* (detected mmx extension) */
LLBL ( Gidcpu_end ):
MOV_L ( ESI, EAX )
STC
POP_L ( ESI )
POP_L ( EBX )
RET
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