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authorGareth Hughes <gareth@valinux.com>2000-12-06 14:41:47 +0000
committerGareth Hughes <gareth@valinux.com>2000-12-06 14:41:47 +0000
commit2ac44e2509dff861d50239d3248c60bf08f3ed92 (patch)
tree3dfb0b4e3cee9c5ac0dedf3a8b555a9cff9c876f /src/mesa/x86/common_x86_asm.S
parentfac5fd258ca18f28290419f9de3f279f7b4a6ede (diff)
Merge Mesa 3.4 test for operating system support for SSE.
Diffstat (limited to 'src/mesa/x86/common_x86_asm.S')
-rw-r--r--src/mesa/x86/common_x86_asm.S59
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 675711e44a..bb75830eb4 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