Assume NEON if targeting NEON-capable hardware, detect otherwise

Don't rely on SIGILL but use sysctl to detect AltiVec on powerpc*

--- src/gallium/auxiliary/util/u_cpu_detect.c.orig	2017-10-02 15:49:02 UTC

+++ src/gallium/auxiliary/util/u_cpu_detect.c

@@ -53,8 +53,9 @@

 #endif

 #if defined(PIPE_OS_FREEBSD) || defined(PIPE_OS_DRAGONFLY)

-#include <sys/types.h>

+#include <sys/param.h>

 #include <sys/sysctl.h>

+#include <elf.h>

 #endif

 #if defined(PIPE_OS_LINUX)

@@ -112,13 +113,21 @@ sigill_handler(int sig)

 static void

 check_os_altivec_support(void)

 {

+#if defined(PIPE_OS_APPLE) || defined(PIPE_OS_FREEBSD) || defined(PIPE_OS_NETBSD) || defined(PIPE_OS_OPENBSD)

 #if defined(PIPE_OS_APPLE)

    int sels[2] = {CTL_HW, HW_VECTORUNIT};

+#elif defined(PIPE_OS_NETBSD) || defined(PIPE_OS_OPENBSD)

+   int sels[2] = {CTL_MACHDEP, CPU_ALTIVEC};

+#endif

    int has_vu = 0;

    int len = sizeof (has_vu);

    int err;

+#if defined(PIPE_OS_FREEBSD)

+   err = sysctlbyname("hw.altivec", &has_vu, &len, NULL, 0 );

+#else

    err = sysctl(sels, 2, &has_vu, &len, NULL, 0);

+#endif

    if (err == 0) {

       if (has_vu != 0) {

@@ -311,13 +320,30 @@ check_os_arm_support(void)

     * used. Because of this we cannot use PIPE_OS_ANDROID here, but rather

     * have a separate macro that only gets enabled from respective Android.mk.

     */

-#if defined(HAS_ANDROID_CPUFEATURES)

+#if defined(__ARM_NEON)

+   util_cpu_caps.has_neon = 1;

+#elif defined(HAS_ANDROID_CPUFEATURES)

    AndroidCpuFamily cpu_family = android_getCpuFamily();

    uint64_t cpu_features = android_getCpuFeatures();

    if (cpu_family == ANDROID_CPU_FAMILY_ARM) {

       if (cpu_features & ANDROID_CPU_ARM_FEATURE_NEON)

          util_cpu_caps.has_neon = 1;

+   }

+#elif defined(PIPE_OS_FREEBSD) && defined(HWCAP_NEON)

+   Elf_Auxinfo auxv[AT_COUNT];

+   size_t len = sizeof(auxv);

+   int mib[] = {

+      CTL_KERN,

+      KERN_PROC,

+      KERN_PROC_AUXV,

+      getpid(),

+   };

+

+   if (sysctl(mib, nitems(mib), auxv, &len, NULL, 0) != -1) {

+      for (size_t i = 0; i < nitems(auxv); i++)

+         if (auxv[i].a_type == AT_HWCAP && auxv[i].a_un.a_val & HWCAP_NEON)

+             util_cpu_caps.has_neon = 1;

    }

 #elif defined(PIPE_OS_LINUX)

     Elf32_auxv_t aux;

- Without sysinfo() fall back to sysconf()

--- src/gallium/drivers/freedreno/freedreno_screen.c.orig	2018-04-21 05:48:24 UTC

+++ src/gallium/drivers/freedreno/freedreno_screen.c

@@ -43,7 +43,11 @@

 #include <errno.h>

 #include <stdio.h>

 #include <stdlib.h>

+#ifdef __GLIBC__

 #include <sys/sysinfo.h>

+#else

+#include <unistd.h>

+#endif

 #include "freedreno_screen.h"

 #include "freedreno_resource.h"

@@ -837,9 +841,13 @@ fd_screen_create(struct fd_device *dev)

 		screen->priority_mask = (1 << val) - 1;

 	}

+#ifdef __GLIBC__

 	struct sysinfo si;

 	sysinfo(&si);

 	screen->ram_size = si.totalram;

+#else

+	screen->ram_size = sysconf(_SC_PHYS_PAGES) * sysconf(_SC_PAGE_SIZE);

+#endif

 	DBG("Pipe Info:");

 	DBG(" GPU-id:          %d", screen->gpu_id);