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-rw-r--r--src/gallium/auxiliary/util/u_cpu_detect.c120
1 files changed, 1 insertions, 119 deletions
diff --git a/src/gallium/auxiliary/util/u_cpu_detect.c b/src/gallium/auxiliary/util/u_cpu_detect.c
index 5056351307..b9b9f9257a 100644
--- a/src/gallium/auxiliary/util/u_cpu_detect.c
+++ b/src/gallium/auxiliary/util/u_cpu_detect.c
@@ -194,123 +194,8 @@ check_os_altivec_support(void)
}
#endif /* PIPE_ARCH_PPC */
-/* If we're running on a processor that can do SSE, let's see if we
- * are allowed to or not. This will catch 2.4.0 or later kernels that
- * haven't been configured for a Pentium III but are running on one,
- * and RedHat patched 2.2 kernels that have broken exception handling
- * support for user space apps that do SSE.
- */
-#if defined(PIPE_ARCH_X86) || defined (PIPE_ARCH_X86_64)
-static void
-check_os_katmai_support(void)
-{
-#if defined(PIPE_ARCH_X86)
-#if defined(PIPE_OS_FREEBSD)
- int has_sse=0, ret;
- int len = sizeof (has_sse);
-
- ret = sysctlbyname("hw.instruction_sse", &has_sse, &len, NULL, 0);
- if (ret || !has_sse)
- util_cpu_caps.has_sse=0;
-
-#elif defined(PIPE_OS_NETBSD) || defined(PIPE_OS_OPENBSD)
- int has_sse, has_sse2, ret, mib[2];
- int varlen;
-
- mib[0] = CTL_MACHDEP;
- mib[1] = CPU_SSE;
- varlen = sizeof (has_sse);
-
- ret = sysctl(mib, 2, &has_sse, &varlen, NULL, 0);
- if (ret < 0 || !has_sse) {
- util_cpu_caps.has_sse = 0;
- } else {
- util_cpu_caps.has_sse = 1;
- }
-
- mib[1] = CPU_SSE2;
- varlen = sizeof (has_sse2);
- ret = sysctl(mib, 2, &has_sse2, &varlen, NULL, 0);
- if (ret < 0 || !has_sse2) {
- util_cpu_caps.has_sse2 = 0;
- } else {
- util_cpu_caps.has_sse2 = 1;
- }
- util_cpu_caps.has_sse = 0; /* FIXME ?!?!? */
-
-#elif defined(PIPE_OS_WINDOWS)
- LPTOP_LEVEL_EXCEPTION_FILTER exc_fil;
- if (util_cpu_caps.has_sse) {
- exc_fil = SetUnhandledExceptionFilter(win32_sig_handler_sse);
-#if defined(PIPE_CC_GCC)
- __asm __volatile ("xorps %xmm0, %xmm0");
-#elif defined(PIPE_CC_MSVC)
- __asm {
- xorps xmm0, xmm0 /* executing SSE instruction */
- }
-#else
-#error Unsupported compiler
-#endif
- SetUnhandledExceptionFilter(exc_fil);
- }
-#elif defined(PIPE_OS_LINUX)
- struct sigaction saved_sigill;
- struct sigaction saved_sigfpe;
-
- /* Save the original signal handlers.
- */
- sigaction(SIGILL, NULL, &saved_sigill);
- sigaction(SIGFPE, NULL, &saved_sigfpe);
-
- signal(SIGILL, (void (*)(int))sigill_handler_sse);
- signal(SIGFPE, (void (*)(int))sigfpe_handler_sse);
-
- /* Emulate test for OSFXSR in CR4. The OS will set this bit if it
- * supports the extended FPU save and restore required for SSE. If
- * we execute an SSE instruction on a PIII and get a SIGILL, the OS
- * doesn't support Streaming SIMD Exceptions, even if the processor
- * does.
- */
- if (util_cpu_caps.has_sse) {
- __asm __volatile ("xorps %xmm1, %xmm0");
- }
-
- /* Emulate test for OSXMMEXCPT in CR4. The OS will set this bit if
- * it supports unmasked SIMD FPU exceptions. If we unmask the
- * exceptions, do a SIMD divide-by-zero and get a SIGILL, the OS
- * doesn't support unmasked SIMD FPU exceptions. If we get a SIGFPE
- * as expected, we're okay but we need to clean up after it.
- *
- * Are we being too stringent in our requirement that the OS support
- * unmasked exceptions? Certain RedHat 2.2 kernels enable SSE by
- * setting CR4.OSFXSR but don't support unmasked exceptions. Win98
- * doesn't even support them. We at least know the user-space SSE
- * support is good in kernels that do support unmasked exceptions,
- * and therefore to be safe I'm going to leave this test in here.
- */
- if (util_cpu_caps.has_sse) {
- /* test_os_katmai_exception_support(); */
- }
-
- /* Restore the original signal handlers.
- */
- sigaction(SIGILL, &saved_sigill, NULL);
- sigaction(SIGFPE, &saved_sigfpe, NULL);
-
-#else
- /* We can't use POSIX signal handling to test the availability of
- * SSE, so we disable it by default.
- */
- util_cpu_caps.has_sse = 0;
-#endif /* __linux__ */
-#endif
-
-#if defined(PIPE_ARCH_X86_64)
- util_cpu_caps.has_sse = 1;
-#endif
-}
-
+#if defined(PIPE_ARCH_X86) || defined (PIPE_ARCH_X86_64)
static int has_cpuid(void)
{
#if defined(PIPE_ARCH_X86)
@@ -469,9 +354,6 @@ util_cpu_detect(void)
util_cpu_caps.cacheline = regs2[2] & 0xFF;
}
- if (util_cpu_caps.has_sse)
- check_os_katmai_support();
-
if (!util_cpu_caps.has_sse) {
util_cpu_caps.has_sse2 = 0;
util_cpu_caps.has_sse3 = 0;