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/*
* Mesa 3-D graphics library
* Version: 6.3
*
* Copyright (C) 1999-2004 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
* THE AUTHORS 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. Now justs returns the raw CPUID
* feature information, allowing the higher level code to interpret the
* results.
*
* Written by Holger Waechtler <holger@akaflieg.extern.tu-berlin.de>
*
* Cleaned up and simplified by Gareth Hughes <gareth@valinux.com>
*
*/
/*
* 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 "assyntax.h"
#include "common_x86_features.h"
SEG_TEXT
ALIGNTEXT4
GLOBL GLNAME(_mesa_x86_has_cpuid)
HIDDEN(_mesa_x86_has_cpuid)
GLNAME(_mesa_x86_has_cpuid):
/* Test for the CPUID command. If the ID Flag bit in EFLAGS
* (bit 21) is writable, the CPUID command is present */
PUSHF_L
POP_L (EAX)
MOV_L (EAX, ECX)
XOR_L (CONST(0x00200000), EAX)
PUSH_L (EAX)
POPF_L
PUSHF_L
POP_L (EAX)
/* Verify the ID Flag bit has been written. */
CMP_L (ECX, EAX)
SETNE (AL)
XOR_L (CONST(0xff), EAX)
RET
ALIGNTEXT4
GLOBL GLNAME(_mesa_x86_cpuid)
HIDDEN(_mesa_x86_cpuid)
GLNAME(_mesa_x86_cpuid):
MOV_L (REGOFF(4, ESP), EAX) /* cpuid op */
PUSH_L (EDI)
PUSH_L (EBX)
CPUID
MOV_L (REGOFF(16, ESP), EDI) /* *eax */
MOV_L (EAX, REGIND(EDI))
MOV_L (REGOFF(20, ESP), EDI) /* *ebx */
MOV_L (EBX, REGIND(EDI))
MOV_L (REGOFF(24, ESP), EDI) /* *ecx */
MOV_L (ECX, REGIND(EDI))
MOV_L (REGOFF(28, ESP), EDI) /* *edx */
MOV_L (EDX, REGIND(EDI))
POP_L (EBX)
POP_L (EDI)
RET
ALIGNTEXT4
GLOBL GLNAME(_mesa_x86_cpuid_eax)
HIDDEN(_mesa_x86_cpuid_eax)
GLNAME(_mesa_x86_cpuid_eax):
MOV_L (REGOFF(4, ESP), EAX) /* cpuid op */
PUSH_L (EBX)
CPUID
POP_L (EBX)
RET
ALIGNTEXT4
GLOBL GLNAME(_mesa_x86_cpuid_ebx)
HIDDEN(_mesa_x86_cpuid_ebx)
GLNAME(_mesa_x86_cpuid_ebx):
MOV_L (REGOFF(4, ESP), EAX) /* cpuid op */
PUSH_L (EBX)
CPUID
MOV_L (EBX, EAX) /* return EBX */
POP_L (EBX)
RET
ALIGNTEXT4
GLOBL GLNAME(_mesa_x86_cpuid_ecx)
HIDDEN(_mesa_x86_cpuid_ecx)
GLNAME(_mesa_x86_cpuid_ecx):
MOV_L (REGOFF(4, ESP), EAX) /* cpuid op */
PUSH_L (EBX)
CPUID
MOV_L (ECX, EAX) /* return ECX */
POP_L (EBX)
RET
ALIGNTEXT4
GLOBL GLNAME(_mesa_x86_cpuid_edx)
HIDDEN(_mesa_x86_cpuid_edx)
GLNAME(_mesa_x86_cpuid_edx):
MOV_L (REGOFF(4, ESP), EAX) /* cpuid op */
PUSH_L (EBX)
CPUID
MOV_L (EDX, EAX) /* return EDX */
POP_L (EBX)
RET
#ifdef USE_SSE_ASM
/* Execute an SSE instruction to see if the operating system correctly
* supports SSE. A signal handler for SIGILL should have been set
* before calling this function, otherwise this could kill the client
* application.
*
* -----> !!!! ATTENTION DEVELOPERS !!!! <-----
*
* If you're debugging with gdb and you get stopped in this function,
* just type 'continue'! Execution will proceed normally.
* See freedesktop.org bug #1709 for more info.
*/
ALIGNTEXT4
GLOBL GLNAME( _mesa_test_os_sse_support )
HIDDEN(_mesa_test_os_sse_support)
GLNAME( _mesa_test_os_sse_support ):
XORPS ( XMM0, XMM0 )
RET
/* Perform an SSE divide-by-zero to see if the operating system
* correctly supports unmasked SIMD FPU exceptions. Signal handlers for
* SIGILL and SIGFPE should have been set before calling this function,
* otherwise this could kill the client application.
*/
ALIGNTEXT4
GLOBL GLNAME( _mesa_test_os_sse_exception_support )
HIDDEN(_mesa_test_os_sse_exception_support)
GLNAME( _mesa_test_os_sse_exception_support ):
PUSH_L ( EBP )
MOV_L ( ESP, EBP )
SUB_L ( CONST( 8 ), ESP )
/* Save the original MXCSR register value.
*/
STMXCSR ( REGOFF( -4, EBP ) )
/* Unmask the divide-by-zero exception and perform one.
*/
STMXCSR ( REGOFF( -8, EBP ) )
AND_L ( CONST( 0xfffffdff ), REGOFF( -8, EBP ) )
LDMXCSR ( REGOFF( -8, EBP ) )
XORPS ( XMM0, XMM0 )
PUSH_L ( CONST( 0x3f800000 ) )
PUSH_L ( CONST( 0x3f800000 ) )
PUSH_L ( CONST( 0x3f800000 ) )
PUSH_L ( CONST( 0x3f800000 ) )
MOVUPS ( REGIND( ESP ), XMM1 )
DIVPS ( XMM0, XMM1 )
/* Restore the original MXCSR register value.
*/
LDMXCSR ( REGOFF( -4, EBP ) )
LEAVE
RET
#endif
#if defined (__ELF__) && defined (__linux__)
.section .note.GNU-stack,"",%progbits
#endif
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