diff --git a/configure b/configure
index fe94941a03..ea50c94002 100755
--- a/configure
+++ b/configure
@@ -2145,6 +2145,7 @@ ARCH_FEATURES="
     fast_64bit
     fast_clz
     fast_cmov
+    fast_float16
     local_aligned
     simd_align_16
     simd_align_32
@@ -5127,6 +5128,8 @@ elif enabled arm; then
             ;;
     esac
 
+    test_cflags -mfp16-format=ieee && add_cflags -mfp16-format=ieee
+
 elif enabled avr32; then
 
     case $cpu in
@@ -6231,6 +6234,15 @@ check_builtin sync_val_compare_and_swap "" "int *ptr; int oldval, newval; __sync
 check_builtin gmtime_r time.h "time_t *time; struct tm *tm; gmtime_r(time, tm)"
 check_builtin localtime_r time.h "time_t *time; struct tm *tm; localtime_r(time, tm)"
 
+check_builtin float16 "" "_Float16 f16var"
+if enabled float16; then
+    if enabled x86; then
+        test_cpp_condition stddef.h "defined(__F16C__)" && enable fast_float16
+    elif enabled arm || enabled aarch64; then
+        enable fast_float16
+    fi
+fi
+
 case "$custom_allocator" in
     jemalloc)
         # jemalloc by default does not use a prefix
diff --git a/libavutil/float2half.c b/libavutil/float2half.c
index c79a3abfa1..1a283956e7 100644
--- a/libavutil/float2half.c
+++ b/libavutil/float2half.c
@@ -20,6 +20,7 @@
 
 void ff_init_float2half_tables(Float2HalfTables *t)
 {
+#if !HAVE_FAST_FLOAT16
     for (int i = 0; i < 256; i++) {
         int e = i - 127;
 
@@ -50,4 +51,5 @@ void ff_init_float2half_tables(Float2HalfTables *t)
             t->shifttable[i|0x100] = 13;
         }
     }
+#endif
 }
diff --git a/libavutil/float2half.h b/libavutil/float2half.h
index 20fdc2a36b..e619046911 100644
--- a/libavutil/float2half.h
+++ b/libavutil/float2half.h
@@ -20,21 +20,37 @@
 #define AVUTIL_FLOAT2HALF_H
 
 #include <stdint.h>
+#include "intfloat.h"
+
+#include "config.h"
 
 typedef struct Float2HalfTables {
+#if HAVE_FAST_FLOAT16
+    uint8_t dummy;
+#else
     uint16_t basetable[512];
     uint8_t shifttable[512];
+#endif
 } Float2HalfTables;
 
 void ff_init_float2half_tables(Float2HalfTables *t);
 
 static inline uint16_t float2half(uint32_t f, const Float2HalfTables *t)
 {
+#if HAVE_FAST_FLOAT16
+    union {
+        _Float16 f;
+        uint16_t i;
+    } u;
+    u.f = av_int2float(f);
+    return u.i;
+#else
     uint16_t h;
 
     h = t->basetable[(f >> 23) & 0x1ff] + ((f & 0x007fffff) >> t->shifttable[(f >> 23) & 0x1ff]);
 
     return h;
+#endif
 }
 
 #endif /* AVUTIL_FLOAT2HALF_H */
diff --git a/libavutil/half2float.c b/libavutil/half2float.c
index 1967126f76..4de2180a19 100644
--- a/libavutil/half2float.c
+++ b/libavutil/half2float.c
@@ -18,6 +18,7 @@
 
 #include "libavutil/half2float.h"
 
+#if !HAVE_FAST_FLOAT16
 static uint32_t convertmantissa(uint32_t i)
 {
     int32_t m = i << 13; // Zero pad mantissa bits
@@ -33,9 +34,11 @@ static uint32_t convertmantissa(uint32_t i)
 
     return m | e; // Return combined number
 }
+#endif
 
 void ff_init_half2float_tables(Half2FloatTables *t)
 {
+#if !HAVE_FAST_FLOAT16
     t->mantissatable[0] = 0;
     for (int i = 1; i < 1024; i++)
         t->mantissatable[i] = convertmantissa(i);
@@ -60,4 +63,5 @@ void ff_init_half2float_tables(Half2FloatTables *t)
     t->offsettable[31] = 2048;
     t->offsettable[32] = 0;
     t->offsettable[63] = 2048;
+#endif
 }
diff --git a/libavutil/half2float.h b/libavutil/half2float.h
index 428a27a19f..dbd5e7150f 100644
--- a/libavutil/half2float.h
+++ b/libavutil/half2float.h
@@ -20,22 +20,38 @@
 #define AVUTIL_HALF2FLOAT_H
 
 #include <stdint.h>
+#include "intfloat.h"
+
+#include "config.h"
 
 typedef struct Half2FloatTables {
+#if HAVE_FAST_FLOAT16
+    uint8_t dummy;
+#else
     uint32_t mantissatable[3072];
     uint32_t exponenttable[64];
     uint16_t offsettable[64];
+#endif
 } Half2FloatTables;
 
 void ff_init_half2float_tables(Half2FloatTables *t);
 
 static inline uint32_t half2float(uint16_t h, const Half2FloatTables *t)
 {
+#if HAVE_FAST_FLOAT16
+    union {
+        _Float16 f;
+        uint16_t i;
+    } u;
+    u.i = h;
+    return av_float2int(u.f);
+#else
     uint32_t f;
 
     f = t->mantissatable[t->offsettable[h >> 10] + (h & 0x3ff)] + t->exponenttable[h >> 10];
 
     return f;
+#endif
 }
 
 #endif /* AVUTIL_HALF2FLOAT_H */