diff options
Diffstat (limited to 'src/mesa/x86/common_x86_asm.S')
| -rw-r--r-- | src/mesa/x86/common_x86_asm.S | 59 |
1 files changed, 56 insertions, 3 deletions
diff --git a/src/mesa/x86/common_x86_asm.S b/src/mesa/x86/common_x86_asm.S index 675711e44aa..bb75830eb47 100644 --- a/src/mesa/x86/common_x86_asm.S +++ b/src/mesa/x86/common_x86_asm.S @@ -1,4 +1,4 @@ -/* $Id: common_x86_asm.S,v 1.2 2000/10/23 00:16:28 gareth Exp $ */ +/* $Id: common_x86_asm.S,v 1.3 2000/12/06 14:41:47 gareth Exp $ */ /* * Mesa 3-D graphics library @@ -55,8 +55,11 @@ /* We might want to print out some useful messages. */ -LLBL( found_intel ): STRING( "Genuine Intel processor found\n\0" ) -LLBL( found_amd ): STRING( "Authentic AMD processor found\n\0" ) +GLNAME( found_intel ): STRING( "Genuine Intel processor found\n\0" ) +GLNAME( found_amd ): STRING( "Authentic AMD processor found\n\0" ) + +GLNAME( katmai_test_dummy ): + D_LONG 0x3f800000, 0x3f800000, 0x3f800000, 0x3f800000 SEG_TEXT @@ -150,3 +153,53 @@ LLBL ( cpuid_done ): POP_L ( EBX ) RET + + +/* 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. + */ +ALIGNTEXT4 +GLOBL GLNAME( gl_test_os_katmai_support ) +GLNAME( gl_test_os_katmai_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( gl_test_os_katmai_exception_support ) +GLNAME( gl_test_os_katmai_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 ) + MOVUPS ( GLNAME( katmai_test_dummy ), XMM1 ) + + DIVPS ( XMM0, XMM1 ) + + /* Restore the original MXCSR register value. + */ + LDMXCSR ( REGOFF( -4, EBP ) ) + + LEAVE + RET |