1 /* $Id: common_x86_asm.S,v 1.17 2003/01/21 16:13:58 brianp Exp $ */
4 * Mesa 3-D graphics library
7 * Copyright (C) 1999-2003 Brian Paul All Rights Reserved.
9 * Permission is hereby granted, free of charge, to any person obtaining a
10 * copy of this software and associated documentation files (the "Software"),
11 * to deal in the Software without restriction, including without limitation
12 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
13 * and/or sell copies of the Software, and to permit persons to whom the
14 * Software is furnished to do so, subject to the following conditions:
16 * The above copyright notice and this permission notice shall be included
17 * in all copies or substantial portions of the Software.
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
20 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
22 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
23 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
24 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
28 * Check extended CPU capabilities. Now justs returns the raw CPUID
29 * feature information, allowing the higher level code to interpret the
32 * Written by Holger Waechtler <holger@akaflieg.extern.tu-berlin.de>
34 * Cleaned up and simplified by Gareth Hughes <gareth@valinux.com>
39 * NOTE: Avoid using spaces in between '(' ')' and arguments, especially
40 * with macros like CONST, LLBL that expand to CONCAT(...). Putting spaces
41 * in there will break the build on some platforms.
45 #include "common_x86_features.h"
50 GLOBL GLNAME(_mesa_x86_has_cpuid)
51 GLNAME(_mesa_x86_has_cpuid):
53 /* Test for the CPUID command. If the ID Flag bit in EFLAGS
54 * (bit 21) is writable, the CPUID command is present */
58 XOR_L (CONST(0x00200000), EAX)
64 /* Verify the ID Flag bit has been written. */
67 XOR_L (CONST(0xff), EAX)
73 GLOBL GLNAME(_mesa_x86_cpuid)
74 GLNAME(_mesa_x86_cpuid):
76 MOV_L (REGOFF(4, ESP), EAX) /* cpuid op */
82 MOV_L (REGOFF(16, ESP), EDI) /* *eax */
83 MOV_L (EAX, REGIND(EDI))
84 MOV_L (REGOFF(20, ESP), EDI) /* *ebx */
85 MOV_L (EBX, REGIND(EDI))
86 MOV_L (REGOFF(24, ESP), EDI) /* *ecx */
87 MOV_L (ECX, REGIND(EDI))
88 MOV_L (REGOFF(28, ESP), EDI) /* *edx */
89 MOV_L (EDX, REGIND(EDI))
96 GLOBL GLNAME(_mesa_x86_cpuid_eax)
97 GLNAME(_mesa_x86_cpuid_eax):
99 MOV_L (REGOFF(4, ESP), EAX) /* cpuid op */
108 GLOBL GLNAME(_mesa_x86_cpuid_ebx)
109 GLNAME(_mesa_x86_cpuid_ebx):
111 MOV_L (REGOFF(4, ESP), EAX) /* cpuid op */
115 MOV_L (EBX, EAX) /* return EBX */
121 GLOBL GLNAME(_mesa_x86_cpuid_ecx)
122 GLNAME(_mesa_x86_cpuid_ecx):
124 MOV_L (REGOFF(4, ESP), EAX) /* cpuid op */
128 MOV_L (ECX, EAX) /* return ECX */
134 GLOBL GLNAME(_mesa_x86_cpuid_edx)
135 GLNAME(_mesa_x86_cpuid_edx):
137 MOV_L (REGOFF(4, ESP), EAX) /* cpuid op */
141 MOV_L (EDX, EAX) /* return EDX */
147 /* Execute an SSE instruction to see if the operating system correctly
148 * supports SSE. A signal handler for SIGILL should have been set
149 * before calling this function, otherwise this could kill the client
153 GLOBL GLNAME( _mesa_test_os_sse_support )
154 GLNAME( _mesa_test_os_sse_support ):
161 /* Perform an SSE divide-by-zero to see if the operating system
162 * correctly supports unmasked SIMD FPU exceptions. Signal handlers for
163 * SIGILL and SIGFPE should have been set before calling this function,
164 * otherwise this could kill the client application.
167 GLOBL GLNAME( _mesa_test_os_sse_exception_support )
168 GLNAME( _mesa_test_os_sse_exception_support ):
172 SUB_L ( CONST( 8 ), ESP )
174 /* Save the original MXCSR register value.
176 STMXCSR ( REGOFF( -4, EBP ) )
178 /* Unmask the divide-by-zero exception and perform one.
180 STMXCSR ( REGOFF( -8, EBP ) )
181 AND_L ( CONST( 0xfffffdff ), REGOFF( -8, EBP ) )
182 LDMXCSR ( REGOFF( -8, EBP ) )
186 PUSH_L ( CONST( 0x3f800000 ) )
187 PUSH_L ( CONST( 0x3f800000 ) )
188 PUSH_L ( CONST( 0x3f800000 ) )
189 PUSH_L ( CONST( 0x3f800000 ) )
191 MOVUPS ( REGIND( ESP ), XMM1 )
195 /* Restore the original MXCSR register value.
197 LDMXCSR ( REGOFF( -4, EBP ) )