From eaed1c96beb1ac134585af8588148eec5d2ba223 Mon Sep 17 00:00:00 2001
From: Henri Gomez <henri.gomez@sonarsource.com>
Date: Tue, 18 Oct 2016 17:10:43 +0200
Subject: [PATCH] ASIMD detection on ARMv8

---
 libretro-common/features/features_cpu.c | 10 ++++++++++
 libretro-common/include/libretro.h      |  1 +
 2 files changed, 11 insertions(+)

diff --git a/libretro-common/features/features_cpu.c b/libretro-common/features/features_cpu.c
index 611f38f493..1e9dcd00ca 100644
--- a/libretro-common/features/features_cpu.c
+++ b/libretro-common/features/features_cpu.c
@@ -704,6 +704,15 @@ uint64_t cpu_features_get(void)
    if (check_arm_cpu_feature("vfpv4"))
       cpu |= RETRO_SIMD_VFPV4;
 
+   if (check_arm_cpu_feature("asymd"))
+   {
+      cpu |= RETRO_SIMD_ASIMD;
+#ifdef __ARM_NEON__
+      cpu |= RETRO_SIMD_NEON;
+      arm_enable_runfast_mode();
+#endif
+   }
+
 #if 0
     check_arm_cpu_feature("swp");
     check_arm_cpu_feature("half");
@@ -748,6 +757,7 @@ uint64_t cpu_features_get(void)
    if (cpu & RETRO_SIMD_VMX128) strlcat(buf, " VMX128", sizeof(buf));
    if (cpu & RETRO_SIMD_VFPU)   strlcat(buf, " VFPU", sizeof(buf));
    if (cpu & RETRO_SIMD_PS)     strlcat(buf, " PS", sizeof(buf));
+   if (cpu & RETRO_SIMD_ASIMD)  strlcat(buf, " ASIMD", sizeof(buf));
 
    return cpu;
 }
diff --git a/libretro-common/include/libretro.h b/libretro-common/include/libretro.h
index 2579e8bb5a..d1f4674e7f 100644
--- a/libretro-common/include/libretro.h
+++ b/libretro-common/include/libretro.h
@@ -1316,6 +1316,7 @@ struct retro_log_callback
 #define RETRO_SIMD_POPCNT   (1 << 18)
 #define RETRO_SIMD_MOVBE    (1 << 19)
 #define RETRO_SIMD_CMOV     (1 << 20)
+#define RETRO_SIMD_ASIMD    (1 << 21)
 
 typedef uint64_t retro_perf_tick_t;
 typedef int64_t retro_time_t;