diff --git a/qemu/aarch64.h b/qemu/aarch64.h
index 74e8107c..07ea7f45 100644
--- a/qemu/aarch64.h
+++ b/qemu/aarch64.h
@@ -496,6 +496,7 @@
 #define float16_mul float16_mul_aarch64
 #define float16_muladd float16_muladd_aarch64
 #define float16_round_to_int float16_round_to_int_aarch64
+#define float16_scalbn float16_scalbn_aarch64
 #define float16_squash_input_denormal float16_squash_input_denormal_aarch64
 #define float16_sub float16_sub_aarch64
 #define float16_to_int16 float16_to_int16_aarch64
diff --git a/qemu/aarch64eb.h b/qemu/aarch64eb.h
index fb4ac03c..11a09015 100644
--- a/qemu/aarch64eb.h
+++ b/qemu/aarch64eb.h
@@ -496,6 +496,7 @@
 #define float16_mul float16_mul_aarch64eb
 #define float16_muladd float16_muladd_aarch64eb
 #define float16_round_to_int float16_round_to_int_aarch64eb
+#define float16_scalbn float16_scalbn_aarch64eb
 #define float16_squash_input_denormal float16_squash_input_denormal_aarch64eb
 #define float16_sub float16_sub_aarch64eb
 #define float16_to_int16 float16_to_int16_aarch64eb
diff --git a/qemu/arm.h b/qemu/arm.h
index 0a1faad5..8bd378ac 100644
--- a/qemu/arm.h
+++ b/qemu/arm.h
@@ -496,6 +496,7 @@
 #define float16_mul float16_mul_arm
 #define float16_muladd float16_muladd_arm
 #define float16_round_to_int float16_round_to_int_arm
+#define float16_scalbn float16_scalbn_arm
 #define float16_squash_input_denormal float16_squash_input_denormal_arm
 #define float16_sub float16_sub_arm
 #define float16_to_int16 float16_to_int16_arm
diff --git a/qemu/armeb.h b/qemu/armeb.h
index 689e9314..a94db789 100644
--- a/qemu/armeb.h
+++ b/qemu/armeb.h
@@ -496,6 +496,7 @@
 #define float16_mul float16_mul_armeb
 #define float16_muladd float16_muladd_armeb
 #define float16_round_to_int float16_round_to_int_armeb
+#define float16_scalbn float16_scalbn_armeb
 #define float16_squash_input_denormal float16_squash_input_denormal_armeb
 #define float16_sub float16_sub_armeb
 #define float16_to_int16 float16_to_int16_armeb
diff --git a/qemu/fpu/softfloat.c b/qemu/fpu/softfloat.c
index 03a3ab97..319f1fc4 100644
--- a/qemu/fpu/softfloat.c
+++ b/qemu/fpu/softfloat.c
@@ -1664,6 +1664,39 @@ float64 uint16_to_float64(uint16_t a, float_status *status)
     return uint64_to_float64(a, status);
 }
 
+/* Multiply A by 2 raised to the power N.  */
+static FloatParts scalbn_decomposed(FloatParts a, int n, float_status *s)
+{
+    if (unlikely(is_nan(a.cls))) {
+        return return_nan(a, s);
+    }
+    if (a.cls == float_class_normal) {
+        a.exp += n;
+    }
+    return a;
+}
+
+float16 float16_scalbn(float16 a, int n, float_status *status)
+{
+    FloatParts pa = float16_unpack_canonical(a, status);
+    FloatParts pr = scalbn_decomposed(pa, n, status);
+    return float16_round_pack_canonical(pr, status);
+}
+
+float32 float32_scalbn(float32 a, int n, float_status *status)
+{
+    FloatParts pa = float32_unpack_canonical(a, status);
+    FloatParts pr = scalbn_decomposed(pa, n, status);
+    return float32_round_pack_canonical(pr, status);
+}
+
+float64 float64_scalbn(float64 a, int n, float_status *status)
+{
+    FloatParts pa = float64_unpack_canonical(a, status);
+    FloatParts pr = scalbn_decomposed(pa, n, status);
+    return float64_round_pack_canonical(pr, status);
+}
+
 /*----------------------------------------------------------------------------
 | Takes a 64-bit fixed-point value `absZ' with binary point between bits 6
 | and 7, and returns the properly rounded 32-bit integer corresponding to the
@@ -6905,80 +6938,6 @@ float ## s float ## s ## _maxnummag(float ## s a, float ## s b, float_status *st
 MINMAX(32)
 MINMAX(64)
 
-
-/* Multiply A by 2 raised to the power N.  */
-float32 float32_scalbn(float32 a, int n, float_status *status)
-{
-    flag aSign;
-    int16_t aExp;
-    uint32_t aSig;
-
-    a = float32_squash_input_denormal(a, status);
-    aSig = extractFloat32Frac( a );
-    aExp = extractFloat32Exp( a );
-    aSign = extractFloat32Sign( a );
-
-    if ( aExp == 0xFF ) {
-        if ( aSig ) {
-            return propagateFloat32NaN( a, a, status );
-        }
-        return a;
-    }
-    if (aExp != 0) {
-        aSig |= 0x00800000;
-    } else if (aSig == 0) {
-        return a;
-    } else {
-        aExp++;
-    }
-
-    if (n > 0x200) {
-        n = 0x200;
-    } else if (n < -0x200) {
-        n = -0x200;
-    }
-
-    aExp += n - 1;
-    aSig <<= 7;
-    return normalizeRoundAndPackFloat32( aSign, aExp, aSig, status );
-}
-
-float64 float64_scalbn(float64 a, int n, float_status *status)
-{
-    flag aSign;
-    int16_t aExp;
-    uint64_t aSig;
-
-    a = float64_squash_input_denormal(a, status);
-    aSig = extractFloat64Frac( a );
-    aExp = extractFloat64Exp( a );
-    aSign = extractFloat64Sign( a );
-
-    if ( aExp == 0x7FF ) {
-        if ( aSig ) {
-            return propagateFloat64NaN( a, a, status );
-        }
-        return a;
-    }
-    if (aExp != 0) {
-        aSig |= LIT64( 0x0010000000000000 );
-    } else if (aSig == 0) {
-        return a;
-    } else {
-        aExp++;
-    }
-
-    if (n > 0x1000) {
-        n = 0x1000;
-    } else if (n < -0x1000) {
-        n = -0x1000;
-    }
-
-    aExp += n - 1;
-    aSig <<= 10;
-    return normalizeRoundAndPackFloat64( aSign, aExp, aSig, status );
-}
-
 floatx80 floatx80_scalbn(floatx80 a, int n, float_status *status)
 {
     flag aSign;
diff --git a/qemu/header_gen.py b/qemu/header_gen.py
index 4d37c2c6..b94a1d20 100644
--- a/qemu/header_gen.py
+++ b/qemu/header_gen.py
@@ -502,6 +502,7 @@ symbols = (
     'float16_mul',
     'float16_muladd',
     'float16_round_to_int',
+    'float16_scalbn',
     'float16_squash_input_denormal',
     'float16_sub',
     'float16_to_int16',
diff --git a/qemu/include/fpu/softfloat.h b/qemu/include/fpu/softfloat.h
index 7c2c32a1..b39d2c21 100644
--- a/qemu/include/fpu/softfloat.h
+++ b/qemu/include/fpu/softfloat.h
@@ -251,6 +251,7 @@ float16 float16_sub(float16, float16, float_status *status);
 float16 float16_mul(float16, float16, float_status *status);
 float16 float16_muladd(float16, float16, float16, int, float_status *status);
 float16 float16_div(float16, float16, float_status *status);
+float16 float16_scalbn(float16, int, float_status *status);
 
 int float16_is_quiet_nan(float16, float_status *status);
 int float16_is_signaling_nan(float16, float_status *status);
diff --git a/qemu/m68k.h b/qemu/m68k.h
index 0758e36e..6a8a580b 100644
--- a/qemu/m68k.h
+++ b/qemu/m68k.h
@@ -496,6 +496,7 @@
 #define float16_mul float16_mul_m68k
 #define float16_muladd float16_muladd_m68k
 #define float16_round_to_int float16_round_to_int_m68k
+#define float16_scalbn float16_scalbn_m68k
 #define float16_squash_input_denormal float16_squash_input_denormal_m68k
 #define float16_sub float16_sub_m68k
 #define float16_to_int16 float16_to_int16_m68k
diff --git a/qemu/mips.h b/qemu/mips.h
index eb2af058..a6b7f215 100644
--- a/qemu/mips.h
+++ b/qemu/mips.h
@@ -496,6 +496,7 @@
 #define float16_mul float16_mul_mips
 #define float16_muladd float16_muladd_mips
 #define float16_round_to_int float16_round_to_int_mips
+#define float16_scalbn float16_scalbn_mips
 #define float16_squash_input_denormal float16_squash_input_denormal_mips
 #define float16_sub float16_sub_mips
 #define float16_to_int16 float16_to_int16_mips
diff --git a/qemu/mips64.h b/qemu/mips64.h
index 5cc50f9a..06ba754a 100644
--- a/qemu/mips64.h
+++ b/qemu/mips64.h
@@ -496,6 +496,7 @@
 #define float16_mul float16_mul_mips64
 #define float16_muladd float16_muladd_mips64
 #define float16_round_to_int float16_round_to_int_mips64
+#define float16_scalbn float16_scalbn_mips64
 #define float16_squash_input_denormal float16_squash_input_denormal_mips64
 #define float16_sub float16_sub_mips64
 #define float16_to_int16 float16_to_int16_mips64
diff --git a/qemu/mips64el.h b/qemu/mips64el.h
index 1387d6f4..782fa295 100644
--- a/qemu/mips64el.h
+++ b/qemu/mips64el.h
@@ -496,6 +496,7 @@
 #define float16_mul float16_mul_mips64el
 #define float16_muladd float16_muladd_mips64el
 #define float16_round_to_int float16_round_to_int_mips64el
+#define float16_scalbn float16_scalbn_mips64el
 #define float16_squash_input_denormal float16_squash_input_denormal_mips64el
 #define float16_sub float16_sub_mips64el
 #define float16_to_int16 float16_to_int16_mips64el
diff --git a/qemu/mipsel.h b/qemu/mipsel.h
index 4ca955c6..88ebbe11 100644
--- a/qemu/mipsel.h
+++ b/qemu/mipsel.h
@@ -496,6 +496,7 @@
 #define float16_mul float16_mul_mipsel
 #define float16_muladd float16_muladd_mipsel
 #define float16_round_to_int float16_round_to_int_mipsel
+#define float16_scalbn float16_scalbn_mipsel
 #define float16_squash_input_denormal float16_squash_input_denormal_mipsel
 #define float16_sub float16_sub_mipsel
 #define float16_to_int16 float16_to_int16_mipsel
diff --git a/qemu/powerpc.h b/qemu/powerpc.h
index e956764c..fb3d870a 100644
--- a/qemu/powerpc.h
+++ b/qemu/powerpc.h
@@ -496,6 +496,7 @@
 #define float16_mul float16_mul_powerpc
 #define float16_muladd float16_muladd_powerpc
 #define float16_round_to_int float16_round_to_int_powerpc
+#define float16_scalbn float16_scalbn_powerpc
 #define float16_squash_input_denormal float16_squash_input_denormal_powerpc
 #define float16_sub float16_sub_powerpc
 #define float16_to_int16 float16_to_int16_powerpc
diff --git a/qemu/sparc.h b/qemu/sparc.h
index 88f6853a..e46019b9 100644
--- a/qemu/sparc.h
+++ b/qemu/sparc.h
@@ -496,6 +496,7 @@
 #define float16_mul float16_mul_sparc
 #define float16_muladd float16_muladd_sparc
 #define float16_round_to_int float16_round_to_int_sparc
+#define float16_scalbn float16_scalbn_sparc
 #define float16_squash_input_denormal float16_squash_input_denormal_sparc
 #define float16_sub float16_sub_sparc
 #define float16_to_int16 float16_to_int16_sparc
diff --git a/qemu/sparc64.h b/qemu/sparc64.h
index 7d430ca7..018bafaf 100644
--- a/qemu/sparc64.h
+++ b/qemu/sparc64.h
@@ -496,6 +496,7 @@
 #define float16_mul float16_mul_sparc64
 #define float16_muladd float16_muladd_sparc64
 #define float16_round_to_int float16_round_to_int_sparc64
+#define float16_scalbn float16_scalbn_sparc64
 #define float16_squash_input_denormal float16_squash_input_denormal_sparc64
 #define float16_sub float16_sub_sparc64
 #define float16_to_int16 float16_to_int16_sparc64
diff --git a/qemu/x86_64.h b/qemu/x86_64.h
index efd177c0..330e523d 100644
--- a/qemu/x86_64.h
+++ b/qemu/x86_64.h
@@ -496,6 +496,7 @@
 #define float16_mul float16_mul_x86_64
 #define float16_muladd float16_muladd_x86_64
 #define float16_round_to_int float16_round_to_int_x86_64
+#define float16_scalbn float16_scalbn_x86_64
 #define float16_squash_input_denormal float16_squash_input_denormal_x86_64
 #define float16_sub float16_sub_x86_64
 #define float16_to_int16 float16_to_int16_x86_64