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527f2f9057
* Create a branch for some evul shell experiments. svn path=/branches/shell-experiments/; revision=61927
220 lines
5.2 KiB
ArmAsm
220 lines
5.2 KiB
ArmAsm
/*
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* Mesa 3-D graphics library
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* Version: 6.3
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*
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* Copyright (C) 1999-2004 Brian Paul All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
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* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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/*
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* Check extended CPU capabilities. Now justs returns the raw CPUID
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* feature information, allowing the higher level code to interpret the
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* results.
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*
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* Written by Holger Waechtler <holger@akaflieg.extern.tu-berlin.de>
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*
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* Cleaned up and simplified by Gareth Hughes <gareth@valinux.com>
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*
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*/
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/*
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* NOTE: Avoid using spaces in between '(' ')' and arguments, especially
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* with macros like CONST, LLBL that expand to CONCAT(...). Putting spaces
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* in there will break the build on some platforms.
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*/
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#include "matypes.h"
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#include "assyntax.h"
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#include "common_x86_features.h"
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SEG_TEXT
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ALIGNTEXT4
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GLOBL GLNAME(_mesa_x86_has_cpuid)
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HIDDEN(_mesa_x86_has_cpuid)
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GLNAME(_mesa_x86_has_cpuid):
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/* Test for the CPUID command. If the ID Flag bit in EFLAGS
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* (bit 21) is writable, the CPUID command is present */
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PUSHF_L
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POP_L (EAX)
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MOV_L (EAX, ECX)
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XOR_L (CONST(0x00200000), EAX)
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PUSH_L (EAX)
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POPF_L
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PUSHF_L
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POP_L (EAX)
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/* Verify the ID Flag bit has been written. */
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CMP_L (ECX, EAX)
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SETNE (AL)
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XOR_L (CONST(0xff), EAX)
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RET
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ALIGNTEXT4
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GLOBL GLNAME(_mesa_x86_cpuid)
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HIDDEN(_mesa_x86_cpuid)
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GLNAME(_mesa_x86_cpuid):
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MOV_L (REGOFF(4, ESP), EAX) /* cpuid op */
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PUSH_L (EDI)
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PUSH_L (EBX)
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CPUID
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MOV_L (REGOFF(16, ESP), EDI) /* *eax */
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MOV_L (EAX, REGIND(EDI))
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MOV_L (REGOFF(20, ESP), EDI) /* *ebx */
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MOV_L (EBX, REGIND(EDI))
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MOV_L (REGOFF(24, ESP), EDI) /* *ecx */
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MOV_L (ECX, REGIND(EDI))
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MOV_L (REGOFF(28, ESP), EDI) /* *edx */
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MOV_L (EDX, REGIND(EDI))
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POP_L (EBX)
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POP_L (EDI)
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RET
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ALIGNTEXT4
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GLOBL GLNAME(_mesa_x86_cpuid_eax)
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HIDDEN(_mesa_x86_cpuid_eax)
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GLNAME(_mesa_x86_cpuid_eax):
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MOV_L (REGOFF(4, ESP), EAX) /* cpuid op */
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PUSH_L (EBX)
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CPUID
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POP_L (EBX)
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RET
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ALIGNTEXT4
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GLOBL GLNAME(_mesa_x86_cpuid_ebx)
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HIDDEN(_mesa_x86_cpuid_ebx)
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GLNAME(_mesa_x86_cpuid_ebx):
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MOV_L (REGOFF(4, ESP), EAX) /* cpuid op */
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PUSH_L (EBX)
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CPUID
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MOV_L (EBX, EAX) /* return EBX */
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POP_L (EBX)
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RET
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ALIGNTEXT4
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GLOBL GLNAME(_mesa_x86_cpuid_ecx)
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HIDDEN(_mesa_x86_cpuid_ecx)
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GLNAME(_mesa_x86_cpuid_ecx):
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MOV_L (REGOFF(4, ESP), EAX) /* cpuid op */
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PUSH_L (EBX)
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CPUID
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MOV_L (ECX, EAX) /* return ECX */
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POP_L (EBX)
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RET
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ALIGNTEXT4
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GLOBL GLNAME(_mesa_x86_cpuid_edx)
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HIDDEN(_mesa_x86_cpuid_edx)
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GLNAME(_mesa_x86_cpuid_edx):
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MOV_L (REGOFF(4, ESP), EAX) /* cpuid op */
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PUSH_L (EBX)
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CPUID
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MOV_L (EDX, EAX) /* return EDX */
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POP_L (EBX)
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RET
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#ifdef USE_SSE_ASM
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/* Execute an SSE instruction to see if the operating system correctly
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* supports SSE. A signal handler for SIGILL should have been set
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* before calling this function, otherwise this could kill the client
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* application.
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*
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* -----> !!!! ATTENTION DEVELOPERS !!!! <-----
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*
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* If you're debugging with gdb and you get stopped in this function,
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* just type 'continue'! Execution will proceed normally.
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* See freedesktop.org bug #1709 for more info.
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*/
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ALIGNTEXT4
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GLOBL GLNAME( _mesa_test_os_sse_support )
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HIDDEN(_mesa_test_os_sse_support)
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GLNAME( _mesa_test_os_sse_support ):
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XORPS ( XMM0, XMM0 )
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RET
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/* Perform an SSE divide-by-zero to see if the operating system
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* correctly supports unmasked SIMD FPU exceptions. Signal handlers for
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* SIGILL and SIGFPE should have been set before calling this function,
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* otherwise this could kill the client application.
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*/
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ALIGNTEXT4
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GLOBL GLNAME( _mesa_test_os_sse_exception_support )
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HIDDEN(_mesa_test_os_sse_exception_support)
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GLNAME( _mesa_test_os_sse_exception_support ):
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PUSH_L ( EBP )
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MOV_L ( ESP, EBP )
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SUB_L ( CONST( 8 ), ESP )
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/* Save the original MXCSR register value.
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*/
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STMXCSR ( REGOFF( -4, EBP ) )
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/* Unmask the divide-by-zero exception and perform one.
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*/
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STMXCSR ( REGOFF( -8, EBP ) )
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AND_L ( CONST( 0xfffffdff ), REGOFF( -8, EBP ) )
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LDMXCSR ( REGOFF( -8, EBP ) )
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XORPS ( XMM0, XMM0 )
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PUSH_L ( CONST( 0x3f800000 ) )
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PUSH_L ( CONST( 0x3f800000 ) )
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PUSH_L ( CONST( 0x3f800000 ) )
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PUSH_L ( CONST( 0x3f800000 ) )
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MOVUPS ( REGIND( ESP ), XMM1 )
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DIVPS ( XMM0, XMM1 )
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/* Restore the original MXCSR register value.
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*/
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LDMXCSR ( REGOFF( -4, EBP ) )
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LEAVE
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RET
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#endif
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#if defined (__ELF__) && defined (__linux__)
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.section .note.GNU-stack,"",%progbits
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#endif
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