diff options
| author | Oded Gabbay <oded.gabbay@gmail.com> | 2015-11-17 12:38:45 +0200 |
|---|---|---|
| committer | Oded Gabbay <oded.gabbay@gmail.com> | 2016-05-01 14:42:28 +0300 |
| commit | 8467043948cb4a55bf113340b52144cae7167dab (patch) | |
| tree | 2ea52c89c00f4cb94862827d6ca71d5e3c88bf87 | |
| parent | e0bd0410ad15476e47c2da5b87730e6243148099 (diff) | |
llvmpipe: Add detection of VSX capability
This patch adds detection of VSX capability. This capability was added to
Power ISA v2.06, and it was first implemented in POWER7 architecture.
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
| -rw-r--r-- | src/gallium/auxiliary/util/u_cpu_detect.c | 27 | ||||
| -rw-r--r-- | src/gallium/auxiliary/util/u_cpu_detect.h | 1 |
2 files changed, 28 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/util/u_cpu_detect.c b/src/gallium/auxiliary/util/u_cpu_detect.c index 10b090216d..10ca8975aa 100644 --- a/src/gallium/auxiliary/util/u_cpu_detect.c +++ b/src/gallium/auxiliary/util/u_cpu_detect.c @@ -139,9 +139,35 @@ check_os_altivec_support(void) } #endif /* !PIPE_OS_APPLE */ } + +static void +check_os_vsx_support(void) +{ +#if !defined(PIPE_OS_APPLE) + /* not on Apple/Darwin, do it the brute-force way */ + /* this is borrowed from the libmpeg2 library */ + signal(SIGILL, sigill_handler); + if (setjmp(__lv_powerpc_jmpbuf)) { + signal(SIGILL, SIG_DFL); + } else { + __lv_powerpc_canjump = 1; + + __asm __volatile + ("mtspr 256, %0\n\t" + "xxland %%vs0, %%vs0, %%vs0" + : + : "r" (-1)); + + signal(SIGILL, SIG_DFL); + util_cpu_caps.has_vsx = 1; + } +#endif /* !PIPE_OS_APPLE */ +} + #endif /* PIPE_ARCH_PPC */ + #if defined(PIPE_ARCH_X86) || defined (PIPE_ARCH_X86_64) static int has_cpuid(void) { @@ -427,6 +453,7 @@ util_cpu_detect(void) #if defined(PIPE_ARCH_PPC) check_os_altivec_support(); + check_os_vsx_support(); #endif /* PIPE_ARCH_PPC */ #ifdef DEBUG diff --git a/src/gallium/auxiliary/util/u_cpu_detect.h b/src/gallium/auxiliary/util/u_cpu_detect.h index 5ccfc93169..0a2a74b27c 100644 --- a/src/gallium/auxiliary/util/u_cpu_detect.h +++ b/src/gallium/auxiliary/util/u_cpu_detect.h @@ -71,6 +71,7 @@ struct util_cpu_caps { unsigned has_xop:1; unsigned has_altivec:1; unsigned has_daz:1; + unsigned has_vsx:1; }; extern struct util_cpu_caps |