diff --git a/src/simd/archsimd/_gen/simdgen/godefs.go b/src/simd/archsimd/_gen/simdgen/godefs.go
index 2c10377420..3ac74264e8 100644
--- a/src/simd/archsimd/_gen/simdgen/godefs.go
+++ b/src/simd/archsimd/_gen/simdgen/godefs.go
@@ -135,6 +135,19 @@ func (o *Operation) DecodeUnified(v *unify.Value) error {
 
 	o.In = append(o.rawOperation.In, o.rawOperation.InVariant...)
 
+	// For down conversions, the high elements are zeroed if the result has more elements.
+	// TODO: we should encode this logic in the YAML file, instead of hardcoding it here.
+	if len(o.In) > 0 && len(o.Out) > 0 {
+		inLanes := o.In[0].Lanes
+		outLanes := o.Out[0].Lanes
+		if inLanes != nil && outLanes != nil && *inLanes < *outLanes {
+			if (strings.Contains(o.Go, "Saturate") || strings.Contains(o.Go, "Truncate")) &&
+				!strings.HasSuffix(o.Go, "Concat") {
+				o.Documentation += "\n// Results are packed to low elements in the returned vector, its upper elements are zeroed."
+			}
+		}
+	}
+
 	return nil
 }
 
diff --git a/src/simd/archsimd/_gen/simdgen/ops/Converts/categories.yaml b/src/simd/archsimd/_gen/simdgen/ops/Converts/categories.yaml
index dd33284063..1e2a6a9b69 100644
--- a/src/simd/archsimd/_gen/simdgen/ops/Converts/categories.yaml
+++ b/src/simd/archsimd/_gen/simdgen/ops/Converts/categories.yaml
@@ -44,124 +44,174 @@
     // NAME converts element values to float64.
 
 # Int <-> Int conversions
-- go: "(Extend|Saturate|Truncate)?ToInt8"
+- go: "TruncateToInt8"
   commutative: false
   regexpTag: "convert"
   documentation: !string |-
-    // NAME converts element values to int8.
-- go: "(Extend|Saturate|Truncate)?ToInt16(Concat)?"
+    // NAME truncates element values to int8.
+- go: "SaturateToInt8"
   commutative: false
   regexpTag: "convert"
   documentation: !string |-
-    // NAME converts element values to int16.
-- go: "(Extend|Saturate|Truncate)?ToInt32"
+    // NAME converts element values to int8 with signed saturation.
+- go: "ExtendToInt16(Concat)?"
   commutative: false
   regexpTag: "convert"
   documentation: !string |-
-    // NAME converts element values to int32.
-- go: "(Extend|Saturate|Truncate)?ToInt64"
+    // NAME sign-extends element values to int16.
+- go: "TruncateToInt16(Concat)?"
   commutative: false
   regexpTag: "convert"
   documentation: !string |-
-    // NAME converts element values to int64.
-- go: "(Extend|Saturate|Truncate)?ToUint8"
+    // NAME truncates element values to int16.
+- go: "SaturateToInt16(Concat)?"
   commutative: false
   regexpTag: "convert"
   documentation: !string |-
-    // NAME converts element values to uint8.
-- go: "(Extend|Saturate|Truncate)?ToUint16(Concat)?"
+    // NAME converts element values to int16 with signed saturation.
+- go: "ExtendToInt32"
   commutative: false
   regexpTag: "convert"
   documentation: !string |-
-    // NAME converts element values to uint16.
-- go: "(Extend|Saturate|Truncate)?ToUint32"
+    // NAME sign-extends element values to int32.
+- go: "TruncateToInt32"
+  commutative: false
+  regexpTag: "convert"
+  documentation: !string |-
+    // NAME truncates element values to int32.
+- go: "SaturateToInt32"
+  commutative: false
+  regexpTag: "convert"
+  documentation: !string |-
+    // NAME converts element values to int32 with signed saturation.
+- go: "ExtendToInt64"
+  commutative: false
+  regexpTag: "convert"
+  documentation: !string |-
+    // NAME sign-extends element values to int64.
+- go: "TruncateToUint8"
+  commutative: false
+  regexpTag: "convert"
+  documentation: !string |-
+    // NAME truncates element values to uint8.
+- go: "SaturateToUint8"
+  commutative: false
+  regexpTag: "convert"
+  documentation: !string |-
+    // NAME converts element values to uint8 with unsigned saturation.
+- go: "ExtendToUint16(Concat)?"
+  commutative: false
+  regexpTag: "convert"
+  documentation: !string |-
+    // NAME zero-extends element values to uint16.
+- go: "TruncateToUint16(Concat)?"
+  commutative: false
+  regexpTag: "convert"
+  documentation: !string |-
+    // NAME truncates element values to uint16.
+- go: "SaturateToUint16(Concat)?"
+  commutative: false
+  regexpTag: "convert"
+  documentation: !string |-
+    // NAME converts element values to uint16 with unsigned saturation.
+- go: "ExtendToUint32"
   regexpTag: "convert"
   commutative: false
   documentation: !string |-
-    // NAME converts element values to uint32.
-- go: "(Extend|Saturate|Truncate)?ToUint64"
+    // NAME zero-extends element values to uint32.
+- go: "TruncateToUint32"
   regexpTag: "convert"
   commutative: false
   documentation: !string |-
-    // NAME converts element values to uint64.
+    // NAME truncates element values to uint32.
+- go: "SaturateToUint32"
+  regexpTag: "convert"
+  commutative: false
+  documentation: !string |-
+    // NAME converts element values to uint32 with unsigned saturation.
+- go: "ExtendToUint64"
+  regexpTag: "convert"
+  commutative: false
+  documentation: !string |-
+    // NAME zero-extends element values to uint64.
 # low-part only Int <-> Int conversions
 - go: ExtendLo8ToUint16x8
   commutative: false
   documentation: !string |-
-    // NAME converts 8 lowest vector element values to uint16.
+    // NAME zero-extends 8 lowest vector element values to uint16.
 - go: ExtendLo8ToInt16x8
   commutative: false
   documentation: !string |-
-    // NAME converts 8 lowest vector element values to int16.
+    // NAME sign-extends 8 lowest vector element values to int16.
 - go: ExtendLo4ToUint32x4
   commutative: false
   documentation: !string |-
-    // NAME converts 4 lowest vector element values to uint32.
+    // NAME zero-extends 4 lowest vector element values to uint32.
 - go: ExtendLo4ToInt32x4
   commutative: false
   documentation: !string |-
-    // NAME converts 4 lowest vector element values to int32.
+    // NAME sign-extends 4 lowest vector element values to int32.
 - go: ExtendLo2ToUint64x2
   commutative: false
   documentation: !string |-
-    // NAME converts 2 lowest vector element values to uint64.
+    // NAME zero-extends 2 lowest vector element values to uint64.
 - go: ExtendLo2ToInt64x2
   commutative: false
   documentation: !string |-
-    // NAME converts 2 lowest vector element values to int64.
+    // NAME sign-extends 2 lowest vector element values to int64.
 - go: ExtendLo2ToUint64x2
   commutative: false
   documentation: !string |-
-    // NAME converts 2 lowest vector element values to uint64.
+    // NAME zero-extends 2 lowest vector element values to uint64.
 - go: ExtendLo4ToUint64x4
   commutative: false
   documentation: !string |-
-    // NAME converts 4 lowest vector element values to uint64.
+    // NAME zero-extends 4 lowest vector element values to uint64.
 - go: ExtendLo2ToInt64x2
   commutative: false
   documentation: !string |-
-    // NAME converts 2 lowest vector element values to int64.
+    // NAME sign-extends 2 lowest vector element values to int64.
 - go: ExtendLo4ToInt64x4
   commutative: false
   documentation: !string |-
-    // NAME converts 4 lowest vector element values to int64.
+    // NAME sign-extends 4 lowest vector element values to int64.
 - go: ExtendLo4ToUint32x4
   commutative: false
   documentation: !string |-
-    // NAME converts 4 lowest vector element values to uint32.
+    // NAME zero-extends 4 lowest vector element values to uint32.
 - go: ExtendLo8ToUint32x8
   commutative: false
   documentation: !string |-
-    // NAME converts 8 lowest vector element values to uint32.
+    // NAME zero-extends 8 lowest vector element values to uint32.
 - go: ExtendLo4ToInt32x4
   commutative: false
   documentation: !string |-
-    // NAME converts 4 lowest vector element values to int32.
+    // NAME sign-extends 4 lowest vector element values to int32.
 - go: ExtendLo8ToInt32x8
   commutative: false
   documentation: !string |-
-    // NAME converts 8 lowest vector element values to int32.
+    // NAME sign-extends 8 lowest vector element values to int32.
 - go: ExtendLo2ToUint64x2
   commutative: false
   documentation: !string |-
-    // NAME converts 2 lowest vector element values to uint64.
+    // NAME zero-extends 2 lowest vector element values to uint64.
 - go: ExtendLo4ToUint64x4
   commutative: false
   documentation: !string |-
-    // NAME converts 4 lowest vector element values to uint64.
+    // NAME zero-extends 4 lowest vector element values to uint64.
 - go: ExtendLo8ToUint64x8
   commutative: false
   documentation: !string |-
-    // NAME converts 8 lowest vector element values to uint64.
+    // NAME zero-extends 8 lowest vector element values to uint64.
 - go: ExtendLo2ToInt64x2
   commutative: false
   documentation: !string |-
-    // NAME converts 2 lowest vector element values to int64.
+    // NAME sign-extends 2 lowest vector element values to int64.
 - go: ExtendLo4ToInt64x4
   commutative: false
   documentation: !string |-
-    // NAME converts 4 lowest vector element values to int64.
+    // NAME sign-extends 4 lowest vector element values to int64.
 - go: ExtendLo8ToInt64x8
   commutative: false
   documentation: !string |-
-    // NAME converts 8 lowest vector element values to int64.
\ No newline at end of file
+    // NAME sign-extends 8 lowest vector element values to int64.
diff --git a/src/simd/archsimd/_gen/simdgen/ops/Converts/go.yaml b/src/simd/archsimd/_gen/simdgen/ops/Converts/go.yaml
index af058124fb..64cd4cb24e 100644
--- a/src/simd/archsimd/_gen/simdgen/ops/Converts/go.yaml
+++ b/src/simd/archsimd/_gen/simdgen/ops/Converts/go.yaml
@@ -138,9 +138,6 @@
 # Widening integer conversions.
 # uint8 -> uint16
 - go: ExtendToUint16
-  addDoc: &zeroExtendDoc
-    !string |-
-    // The result vector's elements are zero-extended.
   regexpTag: "convert"
   asm: "VPMOVZXBW"
   in:
@@ -156,7 +153,6 @@
 - go: ExtendToUint16
   regexpTag: "convert"
   asm: "VPMOVZXBW"
-  addDoc: *zeroExtendDoc
   in:
   - &u8x32
     base: uint
@@ -171,9 +167,6 @@
 - go: ExtendToInt16
   regexpTag: "convert"
   asm: "VPMOVSXBW"
-  addDoc: &signExtendDoc
-    !string |-
-    // The result vector's elements are sign-extended.
   in:
   - &i8x16
     base: int
@@ -187,7 +180,6 @@
 - go: ExtendToInt16
   regexpTag: "convert"
   asm: "VPMOVSXBW"
-  addDoc: *signExtendDoc
   in:
   - &i8x32
     base: int
@@ -202,7 +194,6 @@
 - go: ExtendToUint32
   regexpTag: "convert"
   asm: "VPMOVZXWD"
-  addDoc: *zeroExtendDoc
   in:
   - &u16x8
     base: uint
@@ -216,7 +207,6 @@
 - go: ExtendToUint32
   regexpTag: "convert"
   asm: "VPMOVZXWD"
-  addDoc: *zeroExtendDoc
   in:
   - *u16x16
   out:
@@ -228,7 +218,6 @@
 - go: ExtendToInt32
   regexpTag: "convert"
   asm: "VPMOVSXWD"
-  addDoc: *signExtendDoc
   in:
   - &i16x8
     base: int
@@ -242,7 +231,6 @@
 - go: ExtendToInt32
   regexpTag: "convert"
   asm: "VPMOVSXWD"
-  addDoc: *signExtendDoc
   in:
   - *i16x16
   out:
@@ -254,7 +242,6 @@
 - go: ExtendToUint64
   regexpTag: "convert"
   asm: "VPMOVZXDQ"
-  addDoc: *zeroExtendDoc
   in:
   - &u32x4
     base: uint
@@ -268,7 +255,6 @@
 - go: ExtendToUint64
   regexpTag: "convert"
   asm: "VPMOVZXDQ"
-  addDoc: *zeroExtendDoc
   in:
   - *u32x8
   out:
@@ -280,7 +266,6 @@
 - go: ExtendToInt64
   regexpTag: "convert"
   asm: "VPMOVSXDQ"
-  addDoc: *signExtendDoc
   in:
   - &i32x4
     base: int
@@ -294,7 +279,6 @@
 - go: ExtendToInt64
   regexpTag: "convert"
   asm: "VPMOVSXDQ"
-  addDoc: *signExtendDoc
   in:
   - *i32x8
   out:
@@ -306,7 +290,6 @@
 - go: ExtendToUint64
   regexpTag: "convert"
   asm: "VPMOVZXWQ"
-  addDoc: *zeroExtendDoc
   in:
   - *u16x8
   out:
@@ -315,7 +298,6 @@
 - go: ExtendToInt64
   regexpTag: "convert"
   asm: "VPMOVSXWQ"
-  addDoc: *signExtendDoc
   in:
   - *i16x8
   out:
@@ -324,7 +306,6 @@
 - go: ExtendToUint32
   regexpTag: "convert"
   asm: "VPMOVZXBD"
-  addDoc: *zeroExtendDoc
   in:
   - *u8x16
   out:
@@ -333,7 +314,6 @@
 - go: ExtendToInt32
   regexpTag: "convert"
   asm: "VPMOVSXBD"
-  addDoc: *signExtendDoc
   in:
   - *i8x16
   out:
@@ -342,10 +322,6 @@
 - go: TruncateToInt8
   regexpTag: "convert"
   asm: "VPMOV[WDQ]B"
-  addDoc: &truncDocZeroUpper
-    !string |-
-    // Conversion is done with truncation on the vector elements.
-    // Results are packed to low elements in the returned vector, its upper elements are zero-cleared.
   in:
     - base: int
   out:
@@ -354,7 +330,6 @@
 - go: TruncateToUint8
   regexpTag: "convert"
   asm: "VPMOV[WDQ]B"
-  addDoc: *truncDocZeroUpper
   in:
     - base: uint
   out:
@@ -363,9 +338,6 @@
 - go: TruncateToInt8
   regexpTag: "convert"
   asm: "VPMOV[WDQ]B"
-  addDoc: &truncDoc
-    !string |-
-    // Conversion is done with truncation on the vector elements.
   in:
     - base: int
   out:
@@ -374,7 +346,6 @@
 - go: TruncateToUint8
   regexpTag: "convert"
   asm: "VPMOV[WDQ]B"
-  addDoc: *truncDoc
   in:
     - base: uint
   out:
@@ -383,7 +354,6 @@
 - go: TruncateToInt16
   regexpTag: "convert"
   asm: "VPMOV[DQ]W"
-  addDoc: *truncDoc
   in:
     - base: int
   out:
@@ -391,7 +361,6 @@
 - go: TruncateToUint16
   regexpTag: "convert"
   asm: "VPMOV[DQ]W"
-  addDoc: *truncDoc
   in:
     - base: uint
   out:
@@ -399,7 +368,6 @@
 - go: TruncateToInt32
   regexpTag: "convert"
   asm: "VPMOVQD"
-  addDoc: *truncDoc
   in:
     - base: int
   out:
@@ -407,7 +375,6 @@
 - go: TruncateToUint32
   regexpTag: "convert"
   asm: "VPMOVQD"
-  addDoc: *truncDoc
   in:
     - base: uint
   out:
@@ -416,10 +383,6 @@
 - go: SaturateToInt8
   regexpTag: "convert"
   asm: "VPMOVS[WDQ]B"
-  addDoc: &satDocZeroUpper
-    !string |-
-    // Conversion is done with saturation on the vector elements.
-    // Results are packed to low elements in the returned vector, its upper elements are zero-cleared.
   in:
     - base: int
   out:
@@ -428,7 +391,6 @@
 - go: SaturateToUint8
   regexpTag: "convert"
   asm: "VPMOVS[WDQ]B"
-  addDoc: *satDocZeroUpper
   in:
     - base: int
   out:
@@ -437,9 +399,6 @@
 - go: SaturateToInt8
   regexpTag: "convert"
   asm: "VPMOVS[WDQ]B"
-  addDoc: &satDoc
-    !string |-
-    // Conversion is done with saturation on the vector elements.
   in:
     - base: int
   out:
@@ -448,7 +407,6 @@
 - go: SaturateToUint8
   regexpTag: "convert"
   asm: "VPMOVUS[WDQ]B"
-  addDoc: *satDoc
   in:
     - base: uint
   out:
@@ -457,7 +415,6 @@
 - go: SaturateToInt16
   regexpTag: "convert"
   asm: "VPMOVS[DQ]W"
-  addDoc: *satDoc
   in:
     - base: int
   out:
@@ -465,7 +422,6 @@
 - go: SaturateToUint16
   regexpTag: "convert"
   asm: "VPMOVUS[DQ]W"
-  addDoc: *satDoc
   in:
     - base: uint
   out:
@@ -473,7 +429,6 @@
 - go: SaturateToInt32
   regexpTag: "convert"
   asm: "VPMOVSQD"
-  addDoc: *satDoc
   in:
     - base: int
   out:
@@ -481,7 +436,6 @@
 - go: SaturateToUint32
   regexpTag: "convert"
   asm: "VPMOVUSQD"
-  addDoc: *satDoc
   in:
     - base: uint
   out:
@@ -495,7 +449,6 @@
     // With each 128-bit as a group:
     // The converted group from the first input vector will be packed to the lower part of the result vector,
     // the converted group from the second input vector will be packed to the upper part of the result vector.
-    // Conversion is done with saturation on the vector elements.
   in:
     - base: int
     - base: int
@@ -504,7 +457,6 @@
 - go: SaturateToUint16Concat
   regexpTag: "convert"
   asm: "VPACKUSDW"
-  addDoc: *satDocConcat
   in:
     - base: uint
     - base: uint
@@ -516,7 +468,6 @@
 - go: ExtendLo8ToUint16x8
   regexpTag: "convert"
   asm: "VPMOVZXBW"
-  addDoc: *zeroExtendDoc
   in:
   - *u8x16
   out:
@@ -525,7 +476,6 @@
 - go: ExtendLo8ToInt16x8
   regexpTag: "convert"
   asm: "VPMOVSXBW"
-  addDoc: *signExtendDoc
   in:
   - *i8x16
   out:
@@ -534,7 +484,6 @@
 - go: ExtendLo4ToUint32x4
   regexpTag: "convert"
   asm: "VPMOVZXWD"
-  addDoc: *zeroExtendDoc
   in:
   - *u16x8
   out:
@@ -543,7 +492,6 @@
 - go: ExtendLo4ToInt32x4
   regexpTag: "convert"
   asm: "VPMOVSXWD"
-  addDoc: *signExtendDoc
   in:
   - *i16x8
   out:
@@ -552,7 +500,6 @@
 - go: ExtendLo2ToUint64x2
   regexpTag: "convert"
   asm: "VPMOVZXDQ"
-  addDoc: *zeroExtendDoc
   in:
   - *u32x4
   out:
@@ -564,7 +511,6 @@
 - go: ExtendLo2ToInt64x2
   regexpTag: "convert"
   asm: "VPMOVSXDQ"
-  addDoc: *signExtendDoc
   in:
   - *i32x4
   out:
@@ -576,7 +522,6 @@
 - go: ExtendLo2ToUint64x2
   regexpTag: "convert"
   asm: "VPMOVZXWQ"
-  addDoc: *zeroExtendDoc
   in:
   - *u16x8
   out:
@@ -584,7 +529,6 @@
 - go: ExtendLo4ToUint64x4
   regexpTag: "convert"
   asm: "VPMOVZXWQ"
-  addDoc: *zeroExtendDoc
   in:
   - *u16x8
   out:
@@ -593,7 +537,6 @@
 - go: ExtendLo2ToInt64x2
   regexpTag: "convert"
   asm: "VPMOVSXWQ"
-  addDoc: *signExtendDoc
   in:
   - *i16x8
   out:
@@ -601,7 +544,6 @@
 - go: ExtendLo4ToInt64x4
   regexpTag: "convert"
   asm: "VPMOVSXWQ"
-  addDoc: *signExtendDoc
   in:
   - *i16x8
   out:
@@ -610,7 +552,6 @@
 - go: ExtendLo4ToUint32x4
   regexpTag: "convert"
   asm: "VPMOVZXBD"
-  addDoc: *zeroExtendDoc
   in:
   - *u8x16
   out:
@@ -618,7 +559,6 @@
 - go: ExtendLo8ToUint32x8
   regexpTag: "convert"
   asm: "VPMOVZXBD"
-  addDoc: *zeroExtendDoc
   in:
   - *u8x16
   out:
@@ -627,7 +567,6 @@
 - go: ExtendLo4ToInt32x4
   regexpTag: "convert"
   asm: "VPMOVSXBD"
-  addDoc: *signExtendDoc
   in:
   - *i8x16
   out:
@@ -635,7 +574,6 @@
 - go: ExtendLo8ToInt32x8
   regexpTag: "convert"
   asm: "VPMOVSXBD"
-  addDoc: *signExtendDoc
   in:
   - *i8x16
   out:
@@ -644,7 +582,6 @@
 - go: ExtendLo2ToUint64x2
   regexpTag: "convert"
   asm: "VPMOVZXBQ"
-  addDoc: *zeroExtendDoc
   in:
   - *u8x16
   out:
@@ -652,7 +589,6 @@
 - go: ExtendLo4ToUint64x4
   regexpTag: "convert"
   asm: "VPMOVZXBQ"
-  addDoc: *zeroExtendDoc
   in:
   - *u8x16
   out:
@@ -660,7 +596,6 @@
 - go: ExtendLo8ToUint64x8
   regexpTag: "convert"
   asm: "VPMOVZXBQ"
-  addDoc: *zeroExtendDoc
   in:
   - *u8x16
   out:
@@ -669,7 +604,6 @@
 - go: ExtendLo2ToInt64x2
   regexpTag: "convert"
   asm: "VPMOVSXBQ"
-  addDoc: *signExtendDoc
   in:
   - *i8x16
   out:
@@ -677,7 +611,6 @@
 - go: ExtendLo4ToInt64x4
   regexpTag: "convert"
   asm: "VPMOVSXBQ"
-  addDoc: *signExtendDoc
   in:
   - *i8x16
   out:
@@ -685,8 +618,7 @@
 - go: ExtendLo8ToInt64x8
   regexpTag: "convert"
   asm: "VPMOVSXBQ"
-  addDoc: *signExtendDoc
   in:
   - *i8x16
   out:
-  - *i64x8
\ No newline at end of file
+  - *i64x8
diff --git a/src/simd/archsimd/ops_amd64.go b/src/simd/archsimd/ops_amd64.go
index d01f340d25..2d596ac5f3 100644
--- a/src/simd/archsimd/ops_amd64.go
+++ b/src/simd/archsimd/ops_amd64.go
@@ -2356,252 +2356,216 @@ func (x Uint64x8) Expand(mask Mask64x8) Uint64x8
 
 /* ExtendLo2ToInt64x2 */
 
-// ExtendLo2ToInt64x2 converts 2 lowest vector element values to int64.
-// The result vector's elements are sign-extended.
+// ExtendLo2ToInt64x2 sign-extends 2 lowest vector element values to int64.
 //
 // Asm: VPMOVSXBQ, CPU Feature: AVX
 func (x Int8x16) ExtendLo2ToInt64x2() Int64x2
 
-// ExtendLo2ToInt64x2 converts 2 lowest vector element values to int64.
-// The result vector's elements are sign-extended.
+// ExtendLo2ToInt64x2 sign-extends 2 lowest vector element values to int64.
 //
 // Asm: VPMOVSXWQ, CPU Feature: AVX
 func (x Int16x8) ExtendLo2ToInt64x2() Int64x2
 
-// ExtendLo2ToInt64x2 converts 2 lowest vector element values to int64.
-// The result vector's elements are sign-extended.
+// ExtendLo2ToInt64x2 sign-extends 2 lowest vector element values to int64.
 //
 // Asm: VPMOVSXDQ, CPU Feature: AVX
 func (x Int32x4) ExtendLo2ToInt64x2() Int64x2
 
 /* ExtendLo2ToUint64x2 */
 
-// ExtendLo2ToUint64x2 converts 2 lowest vector element values to uint64.
-// The result vector's elements are zero-extended.
+// ExtendLo2ToUint64x2 zero-extends 2 lowest vector element values to uint64.
 //
 // Asm: VPMOVZXBQ, CPU Feature: AVX
 func (x Uint8x16) ExtendLo2ToUint64x2() Uint64x2
 
-// ExtendLo2ToUint64x2 converts 2 lowest vector element values to uint64.
-// The result vector's elements are zero-extended.
+// ExtendLo2ToUint64x2 zero-extends 2 lowest vector element values to uint64.
 //
 // Asm: VPMOVZXWQ, CPU Feature: AVX
 func (x Uint16x8) ExtendLo2ToUint64x2() Uint64x2
 
-// ExtendLo2ToUint64x2 converts 2 lowest vector element values to uint64.
-// The result vector's elements are zero-extended.
+// ExtendLo2ToUint64x2 zero-extends 2 lowest vector element values to uint64.
 //
 // Asm: VPMOVZXDQ, CPU Feature: AVX
 func (x Uint32x4) ExtendLo2ToUint64x2() Uint64x2
 
 /* ExtendLo4ToInt32x4 */
 
-// ExtendLo4ToInt32x4 converts 4 lowest vector element values to int32.
-// The result vector's elements are sign-extended.
+// ExtendLo4ToInt32x4 sign-extends 4 lowest vector element values to int32.
 //
 // Asm: VPMOVSXBD, CPU Feature: AVX
 func (x Int8x16) ExtendLo4ToInt32x4() Int32x4
 
-// ExtendLo4ToInt32x4 converts 4 lowest vector element values to int32.
-// The result vector's elements are sign-extended.
+// ExtendLo4ToInt32x4 sign-extends 4 lowest vector element values to int32.
 //
 // Asm: VPMOVSXWD, CPU Feature: AVX
 func (x Int16x8) ExtendLo4ToInt32x4() Int32x4
 
 /* ExtendLo4ToInt64x4 */
 
-// ExtendLo4ToInt64x4 converts 4 lowest vector element values to int64.
-// The result vector's elements are sign-extended.
+// ExtendLo4ToInt64x4 sign-extends 4 lowest vector element values to int64.
 //
 // Asm: VPMOVSXBQ, CPU Feature: AVX2
 func (x Int8x16) ExtendLo4ToInt64x4() Int64x4
 
-// ExtendLo4ToInt64x4 converts 4 lowest vector element values to int64.
-// The result vector's elements are sign-extended.
+// ExtendLo4ToInt64x4 sign-extends 4 lowest vector element values to int64.
 //
 // Asm: VPMOVSXWQ, CPU Feature: AVX2
 func (x Int16x8) ExtendLo4ToInt64x4() Int64x4
 
 /* ExtendLo4ToUint32x4 */
 
-// ExtendLo4ToUint32x4 converts 4 lowest vector element values to uint32.
-// The result vector's elements are zero-extended.
+// ExtendLo4ToUint32x4 zero-extends 4 lowest vector element values to uint32.
 //
 // Asm: VPMOVZXBD, CPU Feature: AVX
 func (x Uint8x16) ExtendLo4ToUint32x4() Uint32x4
 
-// ExtendLo4ToUint32x4 converts 4 lowest vector element values to uint32.
-// The result vector's elements are zero-extended.
+// ExtendLo4ToUint32x4 zero-extends 4 lowest vector element values to uint32.
 //
 // Asm: VPMOVZXWD, CPU Feature: AVX
 func (x Uint16x8) ExtendLo4ToUint32x4() Uint32x4
 
 /* ExtendLo4ToUint64x4 */
 
-// ExtendLo4ToUint64x4 converts 4 lowest vector element values to uint64.
-// The result vector's elements are zero-extended.
+// ExtendLo4ToUint64x4 zero-extends 4 lowest vector element values to uint64.
 //
 // Asm: VPMOVZXBQ, CPU Feature: AVX2
 func (x Uint8x16) ExtendLo4ToUint64x4() Uint64x4
 
-// ExtendLo4ToUint64x4 converts 4 lowest vector element values to uint64.
-// The result vector's elements are zero-extended.
+// ExtendLo4ToUint64x4 zero-extends 4 lowest vector element values to uint64.
 //
 // Asm: VPMOVZXWQ, CPU Feature: AVX2
 func (x Uint16x8) ExtendLo4ToUint64x4() Uint64x4
 
 /* ExtendLo8ToInt16x8 */
 
-// ExtendLo8ToInt16x8 converts 8 lowest vector element values to int16.
-// The result vector's elements are sign-extended.
+// ExtendLo8ToInt16x8 sign-extends 8 lowest vector element values to int16.
 //
 // Asm: VPMOVSXBW, CPU Feature: AVX
 func (x Int8x16) ExtendLo8ToInt16x8() Int16x8
 
 /* ExtendLo8ToInt32x8 */
 
-// ExtendLo8ToInt32x8 converts 8 lowest vector element values to int32.
-// The result vector's elements are sign-extended.
+// ExtendLo8ToInt32x8 sign-extends 8 lowest vector element values to int32.
 //
 // Asm: VPMOVSXBD, CPU Feature: AVX2
 func (x Int8x16) ExtendLo8ToInt32x8() Int32x8
 
 /* ExtendLo8ToInt64x8 */
 
-// ExtendLo8ToInt64x8 converts 8 lowest vector element values to int64.
-// The result vector's elements are sign-extended.
+// ExtendLo8ToInt64x8 sign-extends 8 lowest vector element values to int64.
 //
 // Asm: VPMOVSXBQ, CPU Feature: AVX512
 func (x Int8x16) ExtendLo8ToInt64x8() Int64x8
 
 /* ExtendLo8ToUint16x8 */
 
-// ExtendLo8ToUint16x8 converts 8 lowest vector element values to uint16.
-// The result vector's elements are zero-extended.
+// ExtendLo8ToUint16x8 zero-extends 8 lowest vector element values to uint16.
 //
 // Asm: VPMOVZXBW, CPU Feature: AVX
 func (x Uint8x16) ExtendLo8ToUint16x8() Uint16x8
 
 /* ExtendLo8ToUint32x8 */
 
-// ExtendLo8ToUint32x8 converts 8 lowest vector element values to uint32.
-// The result vector's elements are zero-extended.
+// ExtendLo8ToUint32x8 zero-extends 8 lowest vector element values to uint32.
 //
 // Asm: VPMOVZXBD, CPU Feature: AVX2
 func (x Uint8x16) ExtendLo8ToUint32x8() Uint32x8
 
 /* ExtendLo8ToUint64x8 */
 
-// ExtendLo8ToUint64x8 converts 8 lowest vector element values to uint64.
-// The result vector's elements are zero-extended.
+// ExtendLo8ToUint64x8 zero-extends 8 lowest vector element values to uint64.
 //
 // Asm: VPMOVZXBQ, CPU Feature: AVX512
 func (x Uint8x16) ExtendLo8ToUint64x8() Uint64x8
 
 /* ExtendToInt16 */
 
-// ExtendToInt16 converts element values to int16.
-// The result vector's elements are sign-extended.
+// ExtendToInt16 sign-extends element values to int16.
 //
 // Asm: VPMOVSXBW, CPU Feature: AVX2
 func (x Int8x16) ExtendToInt16() Int16x16
 
-// ExtendToInt16 converts element values to int16.
-// The result vector's elements are sign-extended.
+// ExtendToInt16 sign-extends element values to int16.
 //
 // Asm: VPMOVSXBW, CPU Feature: AVX512
 func (x Int8x32) ExtendToInt16() Int16x32
 
 /* ExtendToInt32 */
 
-// ExtendToInt32 converts element values to int32.
-// The result vector's elements are sign-extended.
+// ExtendToInt32 sign-extends element values to int32.
 //
 // Asm: VPMOVSXBD, CPU Feature: AVX512
 func (x Int8x16) ExtendToInt32() Int32x16
 
-// ExtendToInt32 converts element values to int32.
-// The result vector's elements are sign-extended.
+// ExtendToInt32 sign-extends element values to int32.
 //
 // Asm: VPMOVSXWD, CPU Feature: AVX2
 func (x Int16x8) ExtendToInt32() Int32x8
 
-// ExtendToInt32 converts element values to int32.
-// The result vector's elements are sign-extended.
+// ExtendToInt32 sign-extends element values to int32.
 //
 // Asm: VPMOVSXWD, CPU Feature: AVX512
 func (x Int16x16) ExtendToInt32() Int32x16
 
 /* ExtendToInt64 */
 
-// ExtendToInt64 converts element values to int64.
-// The result vector's elements are sign-extended.
+// ExtendToInt64 sign-extends element values to int64.
 //
 // Asm: VPMOVSXWQ, CPU Feature: AVX512
 func (x Int16x8) ExtendToInt64() Int64x8
 
-// ExtendToInt64 converts element values to int64.
-// The result vector's elements are sign-extended.
+// ExtendToInt64 sign-extends element values to int64.
 //
 // Asm: VPMOVSXDQ, CPU Feature: AVX2
 func (x Int32x4) ExtendToInt64() Int64x4
 
-// ExtendToInt64 converts element values to int64.
-// The result vector's elements are sign-extended.
+// ExtendToInt64 sign-extends element values to int64.
 //
 // Asm: VPMOVSXDQ, CPU Feature: AVX512
 func (x Int32x8) ExtendToInt64() Int64x8
 
 /* ExtendToUint16 */
 
-// ExtendToUint16 converts element values to uint16.
-// The result vector's elements are zero-extended.
+// ExtendToUint16 zero-extends element values to uint16.
 //
 // Asm: VPMOVZXBW, CPU Feature: AVX2
 func (x Uint8x16) ExtendToUint16() Uint16x16
 
-// ExtendToUint16 converts element values to uint16.
-// The result vector's elements are zero-extended.
+// ExtendToUint16 zero-extends element values to uint16.
 //
 // Asm: VPMOVZXBW, CPU Feature: AVX512
 func (x Uint8x32) ExtendToUint16() Uint16x32
 
 /* ExtendToUint32 */
 
-// ExtendToUint32 converts element values to uint32.
-// The result vector's elements are zero-extended.
+// ExtendToUint32 zero-extends element values to uint32.
 //
 // Asm: VPMOVZXBD, CPU Feature: AVX512
 func (x Uint8x16) ExtendToUint32() Uint32x16
 
-// ExtendToUint32 converts element values to uint32.
-// The result vector's elements are zero-extended.
+// ExtendToUint32 zero-extends element values to uint32.
 //
 // Asm: VPMOVZXWD, CPU Feature: AVX2
 func (x Uint16x8) ExtendToUint32() Uint32x8
 
-// ExtendToUint32 converts element values to uint32.
-// The result vector's elements are zero-extended.
+// ExtendToUint32 zero-extends element values to uint32.
 //
 // Asm: VPMOVZXWD, CPU Feature: AVX512
 func (x Uint16x16) ExtendToUint32() Uint32x16
 
 /* ExtendToUint64 */
 
-// ExtendToUint64 converts element values to uint64.
-// The result vector's elements are zero-extended.
+// ExtendToUint64 zero-extends element values to uint64.
 //
 // Asm: VPMOVZXWQ, CPU Feature: AVX512
 func (x Uint16x8) ExtendToUint64() Uint64x8
 
-// ExtendToUint64 converts element values to uint64.
-// The result vector's elements are zero-extended.
+// ExtendToUint64 zero-extends element values to uint64.
 //
 // Asm: VPMOVZXDQ, CPU Feature: AVX2
 func (x Uint32x4) ExtendToUint64() Uint64x4
 
-// ExtendToUint64 converts element values to uint64.
-// The result vector's elements are zero-extended.
+// ExtendToUint64 zero-extends element values to uint64.
 //
 // Asm: VPMOVZXDQ, CPU Feature: AVX512
 func (x Uint32x8) ExtendToUint64() Uint64x8
@@ -5365,302 +5329,255 @@ func (x Uint32x4) SHA256TwoRounds(y Uint32x4, z Uint32x4) Uint32x4
 
 /* SaturateToInt8 */
 
-// SaturateToInt8 converts element values to int8.
-// Conversion is done with saturation on the vector elements.
-// Results are packed to low elements in the returned vector, its upper elements are zero-cleared.
+// SaturateToInt8 converts element values to int8 with signed saturation.
+// Results are packed to low elements in the returned vector, its upper elements are zeroed.
 //
 // Asm: VPMOVSWB, CPU Feature: AVX512
 func (x Int16x8) SaturateToInt8() Int8x16
 
-// SaturateToInt8 converts element values to int8.
-// Conversion is done with saturation on the vector elements.
-// Results are packed to low elements in the returned vector, its upper elements are zero-cleared.
+// SaturateToInt8 converts element values to int8 with signed saturation.
 //
 // Asm: VPMOVSWB, CPU Feature: AVX512
 func (x Int16x16) SaturateToInt8() Int8x16
 
-// SaturateToInt8 converts element values to int8.
-// Conversion is done with saturation on the vector elements.
+// SaturateToInt8 converts element values to int8 with signed saturation.
 //
 // Asm: VPMOVSWB, CPU Feature: AVX512
 func (x Int16x32) SaturateToInt8() Int8x32
 
-// SaturateToInt8 converts element values to int8.
-// Conversion is done with saturation on the vector elements.
-// Results are packed to low elements in the returned vector, its upper elements are zero-cleared.
+// SaturateToInt8 converts element values to int8 with signed saturation.
+// Results are packed to low elements in the returned vector, its upper elements are zeroed.
 //
 // Asm: VPMOVSDB, CPU Feature: AVX512
 func (x Int32x4) SaturateToInt8() Int8x16
 
-// SaturateToInt8 converts element values to int8.
-// Conversion is done with saturation on the vector elements.
-// Results are packed to low elements in the returned vector, its upper elements are zero-cleared.
+// SaturateToInt8 converts element values to int8 with signed saturation.
+// Results are packed to low elements in the returned vector, its upper elements are zeroed.
 //
 // Asm: VPMOVSDB, CPU Feature: AVX512
 func (x Int32x8) SaturateToInt8() Int8x16
 
-// SaturateToInt8 converts element values to int8.
-// Conversion is done with saturation on the vector elements.
-// Results are packed to low elements in the returned vector, its upper elements are zero-cleared.
+// SaturateToInt8 converts element values to int8 with signed saturation.
 //
 // Asm: VPMOVSDB, CPU Feature: AVX512
 func (x Int32x16) SaturateToInt8() Int8x16
 
-// SaturateToInt8 converts element values to int8.
-// Conversion is done with saturation on the vector elements.
-// Results are packed to low elements in the returned vector, its upper elements are zero-cleared.
+// SaturateToInt8 converts element values to int8 with signed saturation.
+// Results are packed to low elements in the returned vector, its upper elements are zeroed.
 //
 // Asm: VPMOVSQB, CPU Feature: AVX512
 func (x Int64x2) SaturateToInt8() Int8x16
 
-// SaturateToInt8 converts element values to int8.
-// Conversion is done with saturation on the vector elements.
-// Results are packed to low elements in the returned vector, its upper elements are zero-cleared.
+// SaturateToInt8 converts element values to int8 with signed saturation.
+// Results are packed to low elements in the returned vector, its upper elements are zeroed.
 //
 // Asm: VPMOVSQB, CPU Feature: AVX512
 func (x Int64x4) SaturateToInt8() Int8x16
 
-// SaturateToInt8 converts element values to int8.
-// Conversion is done with saturation on the vector elements.
-// Results are packed to low elements in the returned vector, its upper elements are zero-cleared.
+// SaturateToInt8 converts element values to int8 with signed saturation.
+// Results are packed to low elements in the returned vector, its upper elements are zeroed.
 //
 // Asm: VPMOVSQB, CPU Feature: AVX512
 func (x Int64x8) SaturateToInt8() Int8x16
 
 /* SaturateToInt16 */
 
-// SaturateToInt16 converts element values to int16.
-// Conversion is done with saturation on the vector elements.
+// SaturateToInt16 converts element values to int16 with signed saturation.
+// Results are packed to low elements in the returned vector, its upper elements are zeroed.
 //
 // Asm: VPMOVSDW, CPU Feature: AVX512
 func (x Int32x4) SaturateToInt16() Int16x8
 
-// SaturateToInt16 converts element values to int16.
-// Conversion is done with saturation on the vector elements.
+// SaturateToInt16 converts element values to int16 with signed saturation.
 //
 // Asm: VPMOVSDW, CPU Feature: AVX512
 func (x Int32x8) SaturateToInt16() Int16x8
 
-// SaturateToInt16 converts element values to int16.
-// Conversion is done with saturation on the vector elements.
+// SaturateToInt16 converts element values to int16 with signed saturation.
 //
 // Asm: VPMOVSDW, CPU Feature: AVX512
 func (x Int32x16) SaturateToInt16() Int16x16
 
-// SaturateToInt16 converts element values to int16.
-// Conversion is done with saturation on the vector elements.
+// SaturateToInt16 converts element values to int16 with signed saturation.
+// Results are packed to low elements in the returned vector, its upper elements are zeroed.
 //
 // Asm: VPMOVSQW, CPU Feature: AVX512
 func (x Int64x2) SaturateToInt16() Int16x8
 
-// SaturateToInt16 converts element values to int16.
-// Conversion is done with saturation on the vector elements.
+// SaturateToInt16 converts element values to int16 with signed saturation.
+// Results are packed to low elements in the returned vector, its upper elements are zeroed.
 //
 // Asm: VPMOVSQW, CPU Feature: AVX512
 func (x Int64x4) SaturateToInt16() Int16x8
 
-// SaturateToInt16 converts element values to int16.
-// Conversion is done with saturation on the vector elements.
+// SaturateToInt16 converts element values to int16 with signed saturation.
 //
 // Asm: VPMOVSQW, CPU Feature: AVX512
 func (x Int64x8) SaturateToInt16() Int16x8
 
 /* SaturateToInt16Concat */
 
-// SaturateToInt16Concat converts element values to int16.
+// SaturateToInt16Concat converts element values to int16 with signed saturation.
 // With each 128-bit as a group:
 // The converted group from the first input vector will be packed to the lower part of the result vector,
 // the converted group from the second input vector will be packed to the upper part of the result vector.
-// Conversion is done with saturation on the vector elements.
 //
 // Asm: VPACKSSDW, CPU Feature: AVX
 func (x Int32x4) SaturateToInt16Concat(y Int32x4) Int16x8
 
-// SaturateToInt16Concat converts element values to int16.
+// SaturateToInt16Concat converts element values to int16 with signed saturation.
 // With each 128-bit as a group:
 // The converted group from the first input vector will be packed to the lower part of the result vector,
 // the converted group from the second input vector will be packed to the upper part of the result vector.
-// Conversion is done with saturation on the vector elements.
 //
 // Asm: VPACKSSDW, CPU Feature: AVX2
 func (x Int32x8) SaturateToInt16Concat(y Int32x8) Int16x16
 
-// SaturateToInt16Concat converts element values to int16.
+// SaturateToInt16Concat converts element values to int16 with signed saturation.
 // With each 128-bit as a group:
 // The converted group from the first input vector will be packed to the lower part of the result vector,
 // the converted group from the second input vector will be packed to the upper part of the result vector.
-// Conversion is done with saturation on the vector elements.
 //
 // Asm: VPACKSSDW, CPU Feature: AVX512
 func (x Int32x16) SaturateToInt16Concat(y Int32x16) Int16x32
 
 /* SaturateToInt32 */
 
-// SaturateToInt32 converts element values to int32.
-// Conversion is done with saturation on the vector elements.
+// SaturateToInt32 converts element values to int32 with signed saturation.
+// Results are packed to low elements in the returned vector, its upper elements are zeroed.
 //
 // Asm: VPMOVSQD, CPU Feature: AVX512
 func (x Int64x2) SaturateToInt32() Int32x4
 
-// SaturateToInt32 converts element values to int32.
-// Conversion is done with saturation on the vector elements.
+// SaturateToInt32 converts element values to int32 with signed saturation.
 //
 // Asm: VPMOVSQD, CPU Feature: AVX512
 func (x Int64x4) SaturateToInt32() Int32x4
 
-// SaturateToInt32 converts element values to int32.
-// Conversion is done with saturation on the vector elements.
+// SaturateToInt32 converts element values to int32 with signed saturation.
 //
 // Asm: VPMOVSQD, CPU Feature: AVX512
 func (x Int64x8) SaturateToInt32() Int32x8
 
 /* SaturateToUint8 */
 
-// SaturateToUint8 converts element values to uint8.
-// Conversion is done with saturation on the vector elements.
-// Results are packed to low elements in the returned vector, its upper elements are zero-cleared.
+// SaturateToUint8 converts element values to uint8 with unsigned saturation.
+// Results are packed to low elements in the returned vector, its upper elements are zeroed.
 //
 // Asm: VPMOVSWB, CPU Feature: AVX512
 func (x Int16x8) SaturateToUint8() Int8x16
 
-// SaturateToUint8 converts element values to uint8.
-// Conversion is done with saturation on the vector elements.
-// Results are packed to low elements in the returned vector, its upper elements are zero-cleared.
+// SaturateToUint8 converts element values to uint8 with unsigned saturation.
 //
 // Asm: VPMOVSWB, CPU Feature: AVX512
 func (x Int16x16) SaturateToUint8() Int8x16
 
-// SaturateToUint8 converts element values to uint8.
-// Conversion is done with saturation on the vector elements.
-// Results are packed to low elements in the returned vector, its upper elements are zero-cleared.
+// SaturateToUint8 converts element values to uint8 with unsigned saturation.
+// Results are packed to low elements in the returned vector, its upper elements are zeroed.
 //
 // Asm: VPMOVSDB, CPU Feature: AVX512
 func (x Int32x4) SaturateToUint8() Int8x16
 
-// SaturateToUint8 converts element values to uint8.
-// Conversion is done with saturation on the vector elements.
-// Results are packed to low elements in the returned vector, its upper elements are zero-cleared.
+// SaturateToUint8 converts element values to uint8 with unsigned saturation.
+// Results are packed to low elements in the returned vector, its upper elements are zeroed.
 //
 // Asm: VPMOVSDB, CPU Feature: AVX512
 func (x Int32x8) SaturateToUint8() Int8x16
 
-// SaturateToUint8 converts element values to uint8.
-// Conversion is done with saturation on the vector elements.
-// Results are packed to low elements in the returned vector, its upper elements are zero-cleared.
+// SaturateToUint8 converts element values to uint8 with unsigned saturation.
 //
 // Asm: VPMOVSDB, CPU Feature: AVX512
 func (x Int32x16) SaturateToUint8() Int8x16
 
-// SaturateToUint8 converts element values to uint8.
-// Conversion is done with saturation on the vector elements.
-// Results are packed to low elements in the returned vector, its upper elements are zero-cleared.
+// SaturateToUint8 converts element values to uint8 with unsigned saturation.
+// Results are packed to low elements in the returned vector, its upper elements are zeroed.
 //
 // Asm: VPMOVSQB, CPU Feature: AVX512
 func (x Int64x2) SaturateToUint8() Int8x16
 
-// SaturateToUint8 converts element values to uint8.
-// Conversion is done with saturation on the vector elements.
-// Results are packed to low elements in the returned vector, its upper elements are zero-cleared.
+// SaturateToUint8 converts element values to uint8 with unsigned saturation.
+// Results are packed to low elements in the returned vector, its upper elements are zeroed.
 //
 // Asm: VPMOVSQB, CPU Feature: AVX512
 func (x Int64x4) SaturateToUint8() Int8x16
 
-// SaturateToUint8 converts element values to uint8.
-// Conversion is done with saturation on the vector elements.
-// Results are packed to low elements in the returned vector, its upper elements are zero-cleared.
+// SaturateToUint8 converts element values to uint8 with unsigned saturation.
+// Results are packed to low elements in the returned vector, its upper elements are zeroed.
 //
 // Asm: VPMOVSQB, CPU Feature: AVX512
 func (x Int64x8) SaturateToUint8() Int8x16
 
-// SaturateToUint8 converts element values to uint8.
-// Conversion is done with saturation on the vector elements.
+// SaturateToUint8 converts element values to uint8 with unsigned saturation.
 //
 // Asm: VPMOVUSWB, CPU Feature: AVX512
 func (x Uint16x32) SaturateToUint8() Uint8x32
 
 /* SaturateToUint16 */
 
-// SaturateToUint16 converts element values to uint16.
-// Conversion is done with saturation on the vector elements.
+// SaturateToUint16 converts element values to uint16 with unsigned saturation.
+// Results are packed to low elements in the returned vector, its upper elements are zeroed.
 //
 // Asm: VPMOVUSDW, CPU Feature: AVX512
 func (x Uint32x4) SaturateToUint16() Uint16x8
 
-// SaturateToUint16 converts element values to uint16.
-// Conversion is done with saturation on the vector elements.
+// SaturateToUint16 converts element values to uint16 with unsigned saturation.
 //
 // Asm: VPMOVUSDW, CPU Feature: AVX512
 func (x Uint32x8) SaturateToUint16() Uint16x8
 
-// SaturateToUint16 converts element values to uint16.
-// Conversion is done with saturation on the vector elements.
+// SaturateToUint16 converts element values to uint16 with unsigned saturation.
 //
 // Asm: VPMOVUSDW, CPU Feature: AVX512
 func (x Uint32x16) SaturateToUint16() Uint16x16
 
-// SaturateToUint16 converts element values to uint16.
-// Conversion is done with saturation on the vector elements.
+// SaturateToUint16 converts element values to uint16 with unsigned saturation.
+// Results are packed to low elements in the returned vector, its upper elements are zeroed.
 //
 // Asm: VPMOVUSQW, CPU Feature: AVX512
 func (x Uint64x2) SaturateToUint16() Uint16x8
 
-// SaturateToUint16 converts element values to uint16.
-// Conversion is done with saturation on the vector elements.
+// SaturateToUint16 converts element values to uint16 with unsigned saturation.
+// Results are packed to low elements in the returned vector, its upper elements are zeroed.
 //
 // Asm: VPMOVUSQW, CPU Feature: AVX512
 func (x Uint64x4) SaturateToUint16() Uint16x8
 
-// SaturateToUint16 converts element values to uint16.
-// Conversion is done with saturation on the vector elements.
+// SaturateToUint16 converts element values to uint16 with unsigned saturation.
 //
 // Asm: VPMOVUSQW, CPU Feature: AVX512
 func (x Uint64x8) SaturateToUint16() Uint16x8
 
 /* SaturateToUint16Concat */
 
-// SaturateToUint16Concat converts element values to uint16.
-// With each 128-bit as a group:
-// The converted group from the first input vector will be packed to the lower part of the result vector,
-// the converted group from the second input vector will be packed to the upper part of the result vector.
-// Conversion is done with saturation on the vector elements.
+// SaturateToUint16Concat converts element values to uint16 with unsigned saturation.
 //
 // Asm: VPACKUSDW, CPU Feature: AVX
 func (x Uint32x4) SaturateToUint16Concat(y Uint32x4) Uint16x8
 
-// SaturateToUint16Concat converts element values to uint16.
-// With each 128-bit as a group:
-// The converted group from the first input vector will be packed to the lower part of the result vector,
-// the converted group from the second input vector will be packed to the upper part of the result vector.
-// Conversion is done with saturation on the vector elements.
+// SaturateToUint16Concat converts element values to uint16 with unsigned saturation.
 //
 // Asm: VPACKUSDW, CPU Feature: AVX2
 func (x Uint32x8) SaturateToUint16Concat(y Uint32x8) Uint16x16
 
-// SaturateToUint16Concat converts element values to uint16.
-// With each 128-bit as a group:
-// The converted group from the first input vector will be packed to the lower part of the result vector,
-// the converted group from the second input vector will be packed to the upper part of the result vector.
-// Conversion is done with saturation on the vector elements.
+// SaturateToUint16Concat converts element values to uint16 with unsigned saturation.
 //
 // Asm: VPACKUSDW, CPU Feature: AVX512
 func (x Uint32x16) SaturateToUint16Concat(y Uint32x16) Uint16x32
 
 /* SaturateToUint32 */
 
-// SaturateToUint32 converts element values to uint32.
-// Conversion is done with saturation on the vector elements.
+// SaturateToUint32 converts element values to uint32 with unsigned saturation.
+// Results are packed to low elements in the returned vector, its upper elements are zeroed.
 //
 // Asm: VPMOVUSQD, CPU Feature: AVX512
 func (x Uint64x2) SaturateToUint32() Uint32x4
 
-// SaturateToUint32 converts element values to uint32.
-// Conversion is done with saturation on the vector elements.
+// SaturateToUint32 converts element values to uint32 with unsigned saturation.
 //
 // Asm: VPMOVUSQD, CPU Feature: AVX512
 func (x Uint64x4) SaturateToUint32() Uint32x4
 
-// SaturateToUint32 converts element values to uint32.
-// Conversion is done with saturation on the vector elements.
+// SaturateToUint32 converts element values to uint32 with unsigned saturation.
 //
 // Asm: VPMOVUSQD, CPU Feature: AVX512
 func (x Uint64x8) SaturateToUint32() Uint32x8
@@ -7478,244 +7395,212 @@ func (x Float64x8) TruncScaledResidue(prec uint8) Float64x8
 
 /* TruncateToInt8 */
 
-// TruncateToInt8 converts element values to int8.
-// Conversion is done with truncation on the vector elements.
-// Results are packed to low elements in the returned vector, its upper elements are zero-cleared.
+// TruncateToInt8 truncates element values to int8.
+// Results are packed to low elements in the returned vector, its upper elements are zeroed.
 //
 // Asm: VPMOVWB, CPU Feature: AVX512
 func (x Int16x8) TruncateToInt8() Int8x16
 
-// TruncateToInt8 converts element values to int8.
-// Conversion is done with truncation on the vector elements.
-// Results are packed to low elements in the returned vector, its upper elements are zero-cleared.
+// TruncateToInt8 truncates element values to int8.
 //
 // Asm: VPMOVWB, CPU Feature: AVX512
 func (x Int16x16) TruncateToInt8() Int8x16
 
-// TruncateToInt8 converts element values to int8.
-// Conversion is done with truncation on the vector elements.
+// TruncateToInt8 truncates element values to int8.
 //
 // Asm: VPMOVWB, CPU Feature: AVX512
 func (x Int16x32) TruncateToInt8() Int8x32
 
-// TruncateToInt8 converts element values to int8.
-// Conversion is done with truncation on the vector elements.
-// Results are packed to low elements in the returned vector, its upper elements are zero-cleared.
+// TruncateToInt8 truncates element values to int8.
+// Results are packed to low elements in the returned vector, its upper elements are zeroed.
 //
 // Asm: VPMOVDB, CPU Feature: AVX512
 func (x Int32x4) TruncateToInt8() Int8x16
 
-// TruncateToInt8 converts element values to int8.
-// Conversion is done with truncation on the vector elements.
-// Results are packed to low elements in the returned vector, its upper elements are zero-cleared.
+// TruncateToInt8 truncates element values to int8.
+// Results are packed to low elements in the returned vector, its upper elements are zeroed.
 //
 // Asm: VPMOVDB, CPU Feature: AVX512
 func (x Int32x8) TruncateToInt8() Int8x16
 
-// TruncateToInt8 converts element values to int8.
-// Conversion is done with truncation on the vector elements.
-// Results are packed to low elements in the returned vector, its upper elements are zero-cleared.
+// TruncateToInt8 truncates element values to int8.
 //
 // Asm: VPMOVDB, CPU Feature: AVX512
 func (x Int32x16) TruncateToInt8() Int8x16
 
-// TruncateToInt8 converts element values to int8.
-// Conversion is done with truncation on the vector elements.
-// Results are packed to low elements in the returned vector, its upper elements are zero-cleared.
+// TruncateToInt8 truncates element values to int8.
+// Results are packed to low elements in the returned vector, its upper elements are zeroed.
 //
 // Asm: VPMOVQB, CPU Feature: AVX512
 func (x Int64x2) TruncateToInt8() Int8x16
 
-// TruncateToInt8 converts element values to int8.
-// Conversion is done with truncation on the vector elements.
-// Results are packed to low elements in the returned vector, its upper elements are zero-cleared.
+// TruncateToInt8 truncates element values to int8.
+// Results are packed to low elements in the returned vector, its upper elements are zeroed.
 //
 // Asm: VPMOVQB, CPU Feature: AVX512
 func (x Int64x4) TruncateToInt8() Int8x16
 
-// TruncateToInt8 converts element values to int8.
-// Conversion is done with truncation on the vector elements.
-// Results are packed to low elements in the returned vector, its upper elements are zero-cleared.
+// TruncateToInt8 truncates element values to int8.
+// Results are packed to low elements in the returned vector, its upper elements are zeroed.
 //
 // Asm: VPMOVQB, CPU Feature: AVX512
 func (x Int64x8) TruncateToInt8() Int8x16
 
 /* TruncateToInt16 */
 
-// TruncateToInt16 converts element values to int16.
-// Conversion is done with truncation on the vector elements.
+// TruncateToInt16 truncates element values to int16.
+// Results are packed to low elements in the returned vector, its upper elements are zeroed.
 //
 // Asm: VPMOVDW, CPU Feature: AVX512
 func (x Int32x4) TruncateToInt16() Int16x8
 
-// TruncateToInt16 converts element values to int16.
-// Conversion is done with truncation on the vector elements.
+// TruncateToInt16 truncates element values to int16.
 //
 // Asm: VPMOVDW, CPU Feature: AVX512
 func (x Int32x8) TruncateToInt16() Int16x8
 
-// TruncateToInt16 converts element values to int16.
-// Conversion is done with truncation on the vector elements.
+// TruncateToInt16 truncates element values to int16.
 //
 // Asm: VPMOVDW, CPU Feature: AVX512
 func (x Int32x16) TruncateToInt16() Int16x16
 
-// TruncateToInt16 converts element values to int16.
-// Conversion is done with truncation on the vector elements.
+// TruncateToInt16 truncates element values to int16.
+// Results are packed to low elements in the returned vector, its upper elements are zeroed.
 //
 // Asm: VPMOVQW, CPU Feature: AVX512
 func (x Int64x2) TruncateToInt16() Int16x8
 
-// TruncateToInt16 converts element values to int16.
-// Conversion is done with truncation on the vector elements.
+// TruncateToInt16 truncates element values to int16.
+// Results are packed to low elements in the returned vector, its upper elements are zeroed.
 //
 // Asm: VPMOVQW, CPU Feature: AVX512
 func (x Int64x4) TruncateToInt16() Int16x8
 
-// TruncateToInt16 converts element values to int16.
-// Conversion is done with truncation on the vector elements.
+// TruncateToInt16 truncates element values to int16.
 //
 // Asm: VPMOVQW, CPU Feature: AVX512
 func (x Int64x8) TruncateToInt16() Int16x8
 
 /* TruncateToInt32 */
 
-// TruncateToInt32 converts element values to int32.
-// Conversion is done with truncation on the vector elements.
+// TruncateToInt32 truncates element values to int32.
+// Results are packed to low elements in the returned vector, its upper elements are zeroed.
 //
 // Asm: VPMOVQD, CPU Feature: AVX512
 func (x Int64x2) TruncateToInt32() Int32x4
 
-// TruncateToInt32 converts element values to int32.
-// Conversion is done with truncation on the vector elements.
+// TruncateToInt32 truncates element values to int32.
 //
 // Asm: VPMOVQD, CPU Feature: AVX512
 func (x Int64x4) TruncateToInt32() Int32x4
 
-// TruncateToInt32 converts element values to int32.
-// Conversion is done with truncation on the vector elements.
+// TruncateToInt32 truncates element values to int32.
 //
 // Asm: VPMOVQD, CPU Feature: AVX512
 func (x Int64x8) TruncateToInt32() Int32x8
 
 /* TruncateToUint8 */
 
-// TruncateToUint8 converts element values to uint8.
-// Conversion is done with truncation on the vector elements.
-// Results are packed to low elements in the returned vector, its upper elements are zero-cleared.
+// TruncateToUint8 truncates element values to uint8.
+// Results are packed to low elements in the returned vector, its upper elements are zeroed.
 //
 // Asm: VPMOVWB, CPU Feature: AVX512
 func (x Uint16x8) TruncateToUint8() Uint8x16
 
-// TruncateToUint8 converts element values to uint8.
-// Conversion is done with truncation on the vector elements.
-// Results are packed to low elements in the returned vector, its upper elements are zero-cleared.
+// TruncateToUint8 truncates element values to uint8.
 //
 // Asm: VPMOVWB, CPU Feature: AVX512
 func (x Uint16x16) TruncateToUint8() Uint8x16
 
-// TruncateToUint8 converts element values to uint8.
-// Conversion is done with truncation on the vector elements.
+// TruncateToUint8 truncates element values to uint8.
 //
 // Asm: VPMOVWB, CPU Feature: AVX512
 func (x Uint16x32) TruncateToUint8() Uint8x32
 
-// TruncateToUint8 converts element values to uint8.
-// Conversion is done with truncation on the vector elements.
-// Results are packed to low elements in the returned vector, its upper elements are zero-cleared.
+// TruncateToUint8 truncates element values to uint8.
+// Results are packed to low elements in the returned vector, its upper elements are zeroed.
 //
 // Asm: VPMOVDB, CPU Feature: AVX512
 func (x Uint32x4) TruncateToUint8() Uint8x16
 
-// TruncateToUint8 converts element values to uint8.
-// Conversion is done with truncation on the vector elements.
-// Results are packed to low elements in the returned vector, its upper elements are zero-cleared.
+// TruncateToUint8 truncates element values to uint8.
+// Results are packed to low elements in the returned vector, its upper elements are zeroed.
 //
 // Asm: VPMOVDB, CPU Feature: AVX512
 func (x Uint32x8) TruncateToUint8() Uint8x16
 
-// TruncateToUint8 converts element values to uint8.
-// Conversion is done with truncation on the vector elements.
-// Results are packed to low elements in the returned vector, its upper elements are zero-cleared.
+// TruncateToUint8 truncates element values to uint8.
 //
 // Asm: VPMOVDB, CPU Feature: AVX512
 func (x Uint32x16) TruncateToUint8() Uint8x16
 
-// TruncateToUint8 converts element values to uint8.
-// Conversion is done with truncation on the vector elements.
-// Results are packed to low elements in the returned vector, its upper elements are zero-cleared.
+// TruncateToUint8 truncates element values to uint8.
+// Results are packed to low elements in the returned vector, its upper elements are zeroed.
 //
 // Asm: VPMOVQB, CPU Feature: AVX512
 func (x Uint64x2) TruncateToUint8() Uint8x16
 
-// TruncateToUint8 converts element values to uint8.
-// Conversion is done with truncation on the vector elements.
-// Results are packed to low elements in the returned vector, its upper elements are zero-cleared.
+// TruncateToUint8 truncates element values to uint8.
+// Results are packed to low elements in the returned vector, its upper elements are zeroed.
 //
 // Asm: VPMOVQB, CPU Feature: AVX512
 func (x Uint64x4) TruncateToUint8() Uint8x16
 
-// TruncateToUint8 converts element values to uint8.
-// Conversion is done with truncation on the vector elements.
-// Results are packed to low elements in the returned vector, its upper elements are zero-cleared.
+// TruncateToUint8 truncates element values to uint8.
+// Results are packed to low elements in the returned vector, its upper elements are zeroed.
 //
 // Asm: VPMOVQB, CPU Feature: AVX512
 func (x Uint64x8) TruncateToUint8() Uint8x16
 
 /* TruncateToUint16 */
 
-// TruncateToUint16 converts element values to uint16.
-// Conversion is done with truncation on the vector elements.
+// TruncateToUint16 truncates element values to uint16.
+// Results are packed to low elements in the returned vector, its upper elements are zeroed.
 //
 // Asm: VPMOVDW, CPU Feature: AVX512
 func (x Uint32x4) TruncateToUint16() Uint16x8
 
-// TruncateToUint16 converts element values to uint16.
-// Conversion is done with truncation on the vector elements.
+// TruncateToUint16 truncates element values to uint16.
 //
 // Asm: VPMOVDW, CPU Feature: AVX512
 func (x Uint32x8) TruncateToUint16() Uint16x8
 
-// TruncateToUint16 converts element values to uint16.
-// Conversion is done with truncation on the vector elements.
+// TruncateToUint16 truncates element values to uint16.
 //
 // Asm: VPMOVDW, CPU Feature: AVX512
 func (x Uint32x16) TruncateToUint16() Uint16x16
 
-// TruncateToUint16 converts element values to uint16.
-// Conversion is done with truncation on the vector elements.
+// TruncateToUint16 truncates element values to uint16.
+// Results are packed to low elements in the returned vector, its upper elements are zeroed.
 //
 // Asm: VPMOVQW, CPU Feature: AVX512
 func (x Uint64x2) TruncateToUint16() Uint16x8
 
-// TruncateToUint16 converts element values to uint16.
-// Conversion is done with truncation on the vector elements.
+// TruncateToUint16 truncates element values to uint16.
+// Results are packed to low elements in the returned vector, its upper elements are zeroed.
 //
 // Asm: VPMOVQW, CPU Feature: AVX512
 func (x Uint64x4) TruncateToUint16() Uint16x8
 
-// TruncateToUint16 converts element values to uint16.
-// Conversion is done with truncation on the vector elements.
+// TruncateToUint16 truncates element values to uint16.
 //
 // Asm: VPMOVQW, CPU Feature: AVX512
 func (x Uint64x8) TruncateToUint16() Uint16x8
 
 /* TruncateToUint32 */
 
-// TruncateToUint32 converts element values to uint32.
-// Conversion is done with truncation on the vector elements.
+// TruncateToUint32 truncates element values to uint32.
+// Results are packed to low elements in the returned vector, its upper elements are zeroed.
 //
 // Asm: VPMOVQD, CPU Feature: AVX512
 func (x Uint64x2) TruncateToUint32() Uint32x4
 
-// TruncateToUint32 converts element values to uint32.
-// Conversion is done with truncation on the vector elements.
+// TruncateToUint32 truncates element values to uint32.
 //
 // Asm: VPMOVQD, CPU Feature: AVX512
 func (x Uint64x4) TruncateToUint32() Uint32x4
 
-// TruncateToUint32 converts element values to uint32.
-// Conversion is done with truncation on the vector elements.
+// TruncateToUint32 truncates element values to uint32.
 //
 // Asm: VPMOVQD, CPU Feature: AVX512
 func (x Uint64x8) TruncateToUint32() Uint32x8