68 lines
2.0 KiB
Diff
68 lines
2.0 KiB
Diff
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From a52cfc804813aef8e4b304e20cf843fa6907af6c Mon Sep 17 00:00:00 2001
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From: Chris Robinson <chris.kcat@gmail.com>
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Date: Wed, 7 Sep 2016 09:57:40 -0700
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Subject: [PATCH] Check for run-time NEON support by reading /proc/cpuinfo
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Less than ideal since documentations warn it may not list 'neon' even if it's
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really supported. However, the "proper" APIs to check for NEON extensions don't
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seem to exist in my toolchain.
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[Upstream commit: https://github.com/kcat/openal-soft/commit/a52cfc804813aef8e4b304e20cf843fa6907afc6]
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Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
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---
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Alc/helpers.c | 34 ++++++++++++++++++++++++++++++++--
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1 file changed, 32 insertions(+), 2 deletions(-)
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diff --git a/Alc/helpers.c b/Alc/helpers.c
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index 9b6c7894..4ffda46c 100644
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--- a/Alc/helpers.c
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+++ b/Alc/helpers.c
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@@ -32,6 +32,7 @@
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#include <time.h>
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#include <errno.h>
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#include <stdarg.h>
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+#include <ctype.h>
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#ifdef HAVE_MALLOC_H
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#include <malloc.h>
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#endif
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@@ -232,8 +233,37 @@ void FillCPUCaps(ALuint capfilter)
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#endif
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#endif
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#ifdef HAVE_NEON
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- /* Assume Neon support if compiled with it */
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- caps |= CPU_CAP_NEON;
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+ FILE *file = fopen("/proc/cpuinfo", "rt");
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+ if(file)
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+ ERR("Failed to open /proc/cpuinfo, cannot check for NEON support\n");
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+ else
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+ {
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+ char buf[256];
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+ while(fgets(buf, sizeof(buf), file) != NULL)
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+ {
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+ char *str;
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+
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+ if(strncmp(buf, "Features\t:", 10) != 0)
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+ continue;
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+
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+ TRACE("Got features string:%s\n", buf+10);
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+
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+ str = buf;
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+ while((str=strstr(str, "neon")) != NULL)
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+ {
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+ if(isspace(*(str-1)) && (str[4] == 0 || isspace(str[4])))
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+ {
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+ caps |= CPU_CAP_NEON;
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+ break;
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+ }
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+ str++;
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+ }
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+ break;
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+ }
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+
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+ fclose(file);
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+ file = NULL;
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+ }
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#endif
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TRACE("Extensions:%s%s%s%s%s%s\n",
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