diff --git a/configure b/configure
index 058e895393..b81b7d40a2 100755
--- a/configure
+++ b/configure
@@ -485,6 +485,7 @@ Optimization options (experts only):
   --disable-sve            disable SVE optimizations
   --disable-sve2           disable SVE2 optimizations
   --disable-sme            disable SME optimizations
+  --disable-sme-i16i64     disable SME-I16I64 optimizations
   --disable-sme2           disable SME2 optimizations
   --disable-inline-asm     disable use of inline assembly
   --disable-x86asm         disable use of standalone x86 assembly
@@ -1238,6 +1239,7 @@ check_archext_name_insn(){
     log check_archext_name_insn "$@"
     feature="$1"
     archext="$2"
+    archextdir=$(printf '%s' "$2" | tr '-' '_')
     instr="$3"
     instr2="$4"
     # Check if the assembly is accepted in inline assembly.
@@ -1252,7 +1254,7 @@ check_archext_name_insn(){
 
     # Test if the assembler supports the .arch_extension $archext directive.
     arch_extension_directive=".arch_extension $archext"
-    test_as <<EOF && enable as_archext_${archext}_directive || arch_extension_directive=""
+    test_as <<EOF && enable as_archext_${archextdir}_directive || arch_extension_directive=""
 $arch_directive
 $arch_extension_directive
 EOF
@@ -2304,6 +2306,7 @@ ARCH_EXT_LIST_ARM="
     sve
     sve2
     sme
+    sme_i16i64
     sme2
 "
 
@@ -2575,6 +2578,7 @@ TOOLCHAIN_FEATURES="
     as_archext_sve_directive
     as_archext_sve2_directive
     as_archext_sme_directive
+    as_archext_sme_i16i64_directive
     as_archext_sme2_directive
     as_dn_directive
     as_fpu_directive
@@ -2917,6 +2921,7 @@ i8mm_deps="aarch64 neon"
 sve_deps="aarch64 neon"
 sve2_deps="aarch64 neon sve"
 sme_deps="aarch64 neon sve sve2"
+sme_i16i64_deps="aarch64 neon sve sve2 sme"
 sme2_deps="aarch64 neon sve sve2 sme"
 
 map 'eval ${v}_inline_deps=inline_asm' $ARCH_EXT_LIST_ARM
@@ -6555,13 +6560,14 @@ if enabled aarch64; then
     # internal assembler in clang 3.3 does not support this instruction
     enabled neon && check_insn neon 'ext   v0.8B, v0.8B, v1.8B, #1'
 
-    archext_list="arm_crc dotprod i8mm sve sve2 sme sme2"
+    archext_list="arm_crc dotprod i8mm sve sve2 sme sme_i16i64 sme2"
     enabled arm_crc && check_archext_name_insn arm_crc crc 'crc32x w0, w0, x0'
     enabled dotprod && check_archext_insn dotprod 'udot v0.4s, v0.16b, v0.16b'
     enabled i8mm    && check_archext_insn i8mm    'usdot v0.4s, v0.16b, v0.16b'
     enabled sve     && check_archext_insn sve     'whilelt p0.s, x0, x1'
     enabled sve2    && check_archext_insn sve2    'sqrdmulh z0.s, z0.s, z0.s'
     enabled sme     && check_archext_insn sme     'smstart' 'cntb x0'
+    enabled sme_i16i64 && check_archext_name_insn sme_i16i64 sme-i16i64 'smstart' 'smopa za0.d, p0/m, p0/m, z0.h, z1.h'
     enabled sme2    && check_archext_insn sme2    'smstart' 'sdot za.s[w10, 0], {z0.b-z3.b}, {z4.b-z7.b}'
 
     # Disable the main feature (e.g. HAVE_NEON) if neither inline nor external
@@ -8392,6 +8398,7 @@ if enabled aarch64; then
     echo "SVE enabled               ${sve-no}"
     echo "SVE2 enabled              ${sve2-no}"
     echo "SME enabled               ${sme-no}"
+    echo "SME-I16I64 enabled        ${sme_i16i64-no}"
     echo "SME2 enabled              ${sme2-no}"
 fi
 if enabled arm; then
diff --git a/libavutil/aarch64/asm.S b/libavutil/aarch64/asm.S
index 842e5932db..9e9e11673b 100644
--- a/libavutil/aarch64/asm.S
+++ b/libavutil/aarch64/asm.S
@@ -88,6 +88,14 @@
 #define DISABLE_SME
 #endif
 
+#if HAVE_AS_ARCHEXT_SME_I16I64_DIRECTIVE
+#define ENABLE_SME_I16I64  .arch_extension sme-i16i64
+#define DISABLE_SME_I16I64 .arch_extension nosme-i16i64
+#else
+#define ENABLE_SME_I16I64
+#define DISABLE_SME_I16I64
+#endif
+
 #if HAVE_AS_ARCHEXT_SME2_DIRECTIVE
 #define ENABLE_SME2   .arch_extension sme2
 #define DISABLE_SME2  .arch_extension nosme2
@@ -102,6 +110,7 @@ DISABLE_I8MM
 DISABLE_SVE
 DISABLE_SVE2
 DISABLE_SME
+DISABLE_SME_I16I64
 DISABLE_SME2
 
 
diff --git a/libavutil/aarch64/cpu.c b/libavutil/aarch64/cpu.c
index 56d5cd8dfb..8dd8245358 100644
--- a/libavutil/aarch64/cpu.c
+++ b/libavutil/aarch64/cpu.c
@@ -30,6 +30,7 @@
 #define HWCAP2_AARCH64_SVE2   (1 << 1)
 #define HWCAP2_AARCH64_I8MM   (1 << 13)
 #define HWCAP2_AARCH64_SME    (1 << 23)
+#define HWCAP2_AARCH64_SME_I16I64 (1 << 24)
 #define HWCAP2_AARCH64_SME2   (1ULL << 37)
 
 static int detect_flags(void)
@@ -51,6 +52,8 @@ static int detect_flags(void)
         flags |= AV_CPU_FLAG_I8MM;
     if (hwcap2 & HWCAP2_AARCH64_SME)
         flags |= AV_CPU_FLAG_SME;
+    if (hwcap2 & HWCAP2_AARCH64_SME_I16I64)
+        flags |= AV_CPU_FLAG_SME_I16I64;
     if (hwcap2 & HWCAP2_AARCH64_SME2)
         flags |= AV_CPU_FLAG_SME2;
 
@@ -78,6 +81,8 @@ static int detect_flags(void)
         flags |= AV_CPU_FLAG_I8MM;
     if (have_feature("hw.optional.arm.FEAT_SME"))
         flags |= AV_CPU_FLAG_SME;
+    if (have_feature("hw.optional.arm.FEAT_SME_I16I64"))
+        flags |= AV_CPU_FLAG_SME_I16I64;
     if (have_feature("hw.optional.armv8_crc32"))
         flags |= AV_CPU_FLAG_ARM_CRC;
     if (have_feature("hw.optional.arm.FEAT_SME2"))
@@ -156,6 +161,10 @@ static int detect_flags(void)
     if (IsProcessorFeaturePresent(PF_ARM_SME_INSTRUCTIONS_AVAILABLE))
         flags |= AV_CPU_FLAG_SME;
 #endif
+#ifdef PF_ARM_SME_I16I64_INSTRUCTIONS_AVAILABLE
+    if (IsProcessorFeaturePresent(PF_ARM_SME_I16I64_INSTRUCTIONS_AVAILABLE))
+        flags |= AV_CPU_FLAG_SME_I16I64;
+#endif
 #ifdef PF_ARM_SME2_INSTRUCTIONS_AVAILABLE
     if (IsProcessorFeaturePresent(PF_ARM_SME2_INSTRUCTIONS_AVAILABLE))
         flags |= AV_CPU_FLAG_SME2;
@@ -194,6 +203,9 @@ int ff_get_cpu_flags_aarch64(void)
 #ifdef __ARM_FEATURE_CRC32
     flags |= AV_CPU_FLAG_ARM_CRC;
 #endif
+#ifdef __ARM_FEATURE_SME_I16I64
+    flags |= AV_CPU_FLAG_SME_I16I64;
+#endif
 #ifdef __ARM_FEATURE_SME2
     flags |= AV_CPU_FLAG_SME2;
 #endif
diff --git a/libavutil/aarch64/cpu.h b/libavutil/aarch64/cpu.h
index 81ac1f3499..f1dff3f647 100644
--- a/libavutil/aarch64/cpu.h
+++ b/libavutil/aarch64/cpu.h
@@ -31,6 +31,7 @@
 #define have_sve(flags)     CPUEXT(flags, SVE)
 #define have_sve2(flags)    CPUEXT(flags, SVE2)
 #define have_sme(flags)     CPUEXT(flags, SME)
+#define have_sme_i16i64(flags) CPUEXT(flags, SME_I16I64)
 #define have_sme2(flags)    CPUEXT(flags, SME2)
 
 #if HAVE_SVE
diff --git a/libavutil/cpu.c b/libavutil/cpu.c
index 433851ec5c..07b90aa90a 100644
--- a/libavutil/cpu.c
+++ b/libavutil/cpu.c
@@ -189,6 +189,8 @@ int av_parse_cpu_caps(unsigned *flags, const char *s)
         { "sve2",     NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_SVE2     },    .unit = "flags" },
         { "sme",      NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_SME      },    .unit = "flags" },
         { "crc",      NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_ARM_CRC  },    .unit = "flags" },
+        { "sme_i16i64", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_SME_I16I64 },    .unit = "flags" },
+
         { "sme2",     NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_SME2     },    .unit = "flags" },
 #elif ARCH_MIPS
         { "mmi",      NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AV_CPU_FLAG_MMI      },    .unit = "flags" },
diff --git a/libavutil/cpu.h b/libavutil/cpu.h
index 13d4786f27..464d4cd5df 100644
--- a/libavutil/cpu.h
+++ b/libavutil/cpu.h
@@ -80,6 +80,7 @@
 #define AV_CPU_FLAG_SME          (1 <<12)
 #define AV_CPU_FLAG_ARM_CRC      (1 <<13)
 #define AV_CPU_FLAG_SME2         (1 <<14)
+#define AV_CPU_FLAG_SME_I16I64   (1 <<15)
 #define AV_CPU_FLAG_SETEND       (1 <<16)
 
 #define AV_CPU_FLAG_MMI          (1 << 0)
diff --git a/libavutil/tests/cpu.c b/libavutil/tests/cpu.c
index 5720b3c8d1..3e468fecc8 100644
--- a/libavutil/tests/cpu.c
+++ b/libavutil/tests/cpu.c
@@ -49,6 +49,7 @@ static const struct {
     { AV_CPU_FLAG_SVE,       "sve"        },
     { AV_CPU_FLAG_SVE2,      "sve2"       },
     { AV_CPU_FLAG_SME,       "sme"        },
+    { AV_CPU_FLAG_SME_I16I64, "sme_i16i64" },
     { AV_CPU_FLAG_ARM_CRC,   "crc"        },
     { AV_CPU_FLAG_SME2,      "sme2"       },
 #elif ARCH_ARM
diff --git a/tests/checkasm/checkasm.c b/tests/checkasm/checkasm.c
index e25faaec7f..a4ac8f1483 100644
--- a/tests/checkasm/checkasm.c
+++ b/tests/checkasm/checkasm.c
@@ -377,6 +377,7 @@ static const struct {
     { "SVE",      "sve",      AV_CPU_FLAG_SVE },
     { "SVE2",     "sve2",     AV_CPU_FLAG_SVE2 },
     { "SME",      "sme",      AV_CPU_FLAG_SME },
+    { "SME-I16I64", "sme_i16i64", AV_CPU_FLAG_SME_I16I64 },
     { "CRC",      "crc",      AV_CPU_FLAG_ARM_CRC },
     { "SME2",     "sme2",      AV_CPU_FLAG_SME2 },
 #elif ARCH_ARM