[spectext] Add double precision conversion

Instructions were added in #383.

Consolidate conversion operations (vcvtop) more, merging int-int
widening operations.

Drive-by fix extmul definition in syntax (shouldn't include the shape).

Author: ngzhian

document/core/appendix/gen-index-instructions.py

@@ -446,10 +446,10 @@ def Instruction(name, opcode, type=None, validation=None, execution=None, operat
     Instruction(r'\I16X8.\BITMASK', r'\hex{FD}~~132', r'[\V128] \to [\I32]', r'valid-simd-bitmask', r'exec-simd-bitmask'),
     Instruction(r'\I16X8.\NARROW\K{\_i16x8\_s}', r'\hex{FD}~~133', r'[\V128~\V128] \to [\V128]', r'valid-vbinop', r'exec-simd-narrow'),
     Instruction(r'\I16X8.\NARROW\K{\_i16x8\_u}', r'\hex{FD}~~134', r'[\V128~\V128] \to [\V128]', r'valid-vbinop', r'exec-simd-narrow'),
-    Instruction(r'\I16X8.\VEXTEND\K{\_low\_i8x16\_s}', r'\hex{FD}~~135', r'[\V128] \to [\V128]', r'valid-vunop', r'exec-simd-extend'),
-    Instruction(r'\I16X8.\VEXTEND\K{\_high\_i8x16\_s}', r'\hex{FD}~~136', r'[\V128] \to [\V128]', r'valid-vunop', r'exec-simd-extend'),
-    Instruction(r'\I16X8.\VEXTEND\K{\_low\_i8x16\_u}', r'\hex{FD}~~137', r'[\V128] \to [\V128]', r'valid-vunop', r'exec-simd-extend'),
-    Instruction(r'\I16X8.\VEXTEND\K{\_high\_i8x16\_u}', r'\hex{FD}~~138', r'[\V128] \to [\V128]', r'valid-vunop', r'exec-simd-extend'),
+    Instruction(r'\I16X8.\VEXTEND\K{\_low\_i8x16\_s}', r'\hex{FD}~~135', r'[\V128] \to [\V128]', r'valid-vunop', r'exec-vcvtop'),
+    Instruction(r'\I16X8.\VEXTEND\K{\_high\_i8x16\_s}', r'\hex{FD}~~136', r'[\V128] \to [\V128]', r'valid-vunop', r'exec-vcvtop'),
+    Instruction(r'\I16X8.\VEXTEND\K{\_low\_i8x16\_u}', r'\hex{FD}~~137', r'[\V128] \to [\V128]', r'valid-vunop', r'exec-vcvtop'),
+    Instruction(r'\I16X8.\VEXTEND\K{\_high\_i8x16\_u}', r'\hex{FD}~~138', r'[\V128] \to [\V128]', r'valid-vunop', r'exec-vcvtop'),
     Instruction(r'\I16X8.\VSHL', r'\hex{FD}~~139', r'[\V128~\I32] \to [\V128]', r'valid-vshiftop', r'exec-vshiftop', r'op-ishl'),
     Instruction(r'\I16X8.\VSHR\K{\_s}', r'\hex{FD}~~140', r'[\V128~\I32] \to [\V128]', r'valid-vshiftop', r'exec-vshiftop', r'op-ishr_s'),
     Instruction(r'\I16X8.\VSHR\K{\_u}', r'\hex{FD}~~141', r'[\V128~\I32] \to [\V128]', r'valid-vshiftop', r'exec-vshiftop', r'op-ishr_u'),
@@ -478,10 +478,10 @@ def Instruction(name, opcode, type=None, validation=None, execution=None, operat
     Instruction(r'\I32X4.\BITMASK', r'\hex{FD}~~164', r'[\V128] \to [\I32]', r'valid-simd-bitmask', r'exec-simd-bitmask'),
     Instruction(r'\I32X4.\EXTADDPAIRWISE\K{\_i16x8\_s}', r'\hex{FD}~~165', r'[\V128] \to [\V128]', r'valid-simd-extaddpairwise', r'exec-simd-extaddpairwise'),
     Instruction(r'\I32X4.\EXTADDPAIRWISE\K{\_i16x8\_u}', r'\hex{FD}~~166', r'[\V128] \to [\V128]', r'valid-simd-extaddpairwise', r'exec-simd-extaddpairwise'),
-    Instruction(r'\I32X4.\VEXTEND\K{\_low\_i16x8\_s}', r'\hex{FD}~~167', r'[\V128] \to [\V128]', r'valid-vunop', r'exec-simd-extend'),
-    Instruction(r'\I32X4.\VEXTEND\K{\_high\_i16x8\_s}', r'\hex{FD}~~168', r'[\V128] \to [\V128]', r'valid-vunop', r'exec-simd-extend'),
-    Instruction(r'\I32X4.\VEXTEND\K{\_low\_i16x8\_u}', r'\hex{FD}~~169', r'[\V128] \to [\V128]', r'valid-vunop', r'exec-simd-extend'),
-    Instruction(r'\I32X4.\VEXTEND\K{\_high\_i16x8\_u}', r'\hex{FD}~~170', r'[\V128] \to [\V128]', r'valid-vunop', r'exec-simd-extend'),
+    Instruction(r'\I32X4.\VEXTEND\K{\_low\_i16x8\_s}', r'\hex{FD}~~167', r'[\V128] \to [\V128]', r'valid-vunop', r'exec-vcvtop'),
+    Instruction(r'\I32X4.\VEXTEND\K{\_high\_i16x8\_s}', r'\hex{FD}~~168', r'[\V128] \to [\V128]', r'valid-vunop', r'exec-vcvtop'),
+    Instruction(r'\I32X4.\VEXTEND\K{\_low\_i16x8\_u}', r'\hex{FD}~~169', r'[\V128] \to [\V128]', r'valid-vunop', r'exec-vcvtop'),
+    Instruction(r'\I32X4.\VEXTEND\K{\_high\_i16x8\_u}', r'\hex{FD}~~170', r'[\V128] \to [\V128]', r'valid-vunop', r'exec-vcvtop'),
     Instruction(r'\I32X4.\VSHL', r'\hex{FD}~~171', r'[\V128~\I32] \to [\V128]', r'valid-vshiftop', r'exec-vshiftop', r'op-ishl'),
     Instruction(r'\I32X4.\VSHR\K{\_s}', r'\hex{FD}~~172', r'[\V128~\I32] \to [\V128]', r'valid-vshiftop', r'exec-vshiftop', r'op-ishr_s'),
     Instruction(r'\I32X4.\VSHR\K{\_u}', r'\hex{FD}~~173', r'[\V128~\I32] \to [\V128]', r'valid-vshiftop', r'exec-vshiftop', r'op-ishr_u'),
@@ -500,10 +500,10 @@ def Instruction(name, opcode, type=None, validation=None, execution=None, operat
     Instruction(r'\I64X2.\VABS', r'\hex{FD}~~162', r'[\V128] \to [\V128]', r'valid-vunop', r'exec-vunop', r'op-iabs'),
     Instruction(r'\I64X2.\VNEG', r'\hex{FD}~~193', r'[\V128] \to [\V128]', r'valid-vunop', r'exec-vunop', r'op-ineg'),
     Instruction(r'\I64X2.\BITMASK', r'\hex{FD}~~196', r'[\V128] \to [\I32]', r'valid-simd-bitmask', r'exec-simd-bitmask'),
-    Instruction(r'\I64X2.\VEXTEND\K{\_low\_i32x4\_s}', r'\hex{FD}~~199', r'[\V128] \to [\V128]', r'valid-vunop', r'exec-simd-extend'),
-    Instruction(r'\I64X2.\VEXTEND\K{\_high\_i32x4\_s}', r'\hex{FD}~~200', r'[\V128] \to [\V128]', r'valid-vunop', r'exec-simd-extend'),
-    Instruction(r'\I64X2.\VEXTEND\K{\_low\_i32x4\_u}', r'\hex{FD}~~201', r'[\V128] \to [\V128]', r'valid-vunop', r'exec-simd-extend'),
-    Instruction(r'\I64X2.\VEXTEND\K{\_high\_i32x4\_u}', r'\hex{FD}~~202', r'[\V128] \to [\V128]', r'valid-vunop', r'exec-simd-extend'),
+    Instruction(r'\I64X2.\VEXTEND\K{\_low\_i32x4\_s}', r'\hex{FD}~~199', r'[\V128] \to [\V128]', r'valid-vunop', r'exec-vcvtop'),
+    Instruction(r'\I64X2.\VEXTEND\K{\_high\_i32x4\_s}', r'\hex{FD}~~200', r'[\V128] \to [\V128]', r'valid-vunop', r'exec-vcvtop'),
+    Instruction(r'\I64X2.\VEXTEND\K{\_low\_i32x4\_u}', r'\hex{FD}~~201', r'[\V128] \to [\V128]', r'valid-vunop', r'exec-vcvtop'),
+    Instruction(r'\I64X2.\VEXTEND\K{\_high\_i32x4\_u}', r'\hex{FD}~~202', r'[\V128] \to [\V128]', r'valid-vunop', r'exec-vcvtop'),
     Instruction(r'\I64X2.\VSHL', r'\hex{FD}~~203', r'[\V128~\I32] \to [\V128]', r'valid-vshiftop', r'exec-vshiftop', r'op-ishl'),
     Instruction(r'\I64X2.\VSHR\K{\_s}', r'\hex{FD}~~204', r'[\V128~\I32] \to [\V128]', r'valid-vshiftop', r'exec-vshiftop', r'op-ishr_s'),
     Instruction(r'\I64X2.\VSHR\K{\_u}', r'\hex{FD}~~205', r'[\V128~\I32] \to [\V128]', r'valid-vshiftop', r'exec-vshiftop', r'op-ishr_u'),
@@ -537,10 +537,16 @@ def Instruction(name, opcode, type=None, validation=None, execution=None, operat
     Instruction(r'\F64X2.\VPMIN', r'\hex{FD}~~245', r'[\V128~\V128] \to [\V128]', r'valid-vbinop', r'exec-vbinop', r'op-fpmin'),
     Instruction(r'\F64X2.\VPMAX', r'\hex{FD}~~246', r'[\V128~\V128] \to [\V128]', r'valid-vbinop', r'exec-vbinop', r'op-fpmax'),
     Instruction(r'\F64X2.\VMAX', r'\hex{FD}~~245', r'[\V128~\V128] \to [\V128]', r'valid-vbinop', r'exec-vbinop', r'op-fmax'),
-    Instruction(r'\I32X4.\TRUNC\K{\_sat\_f32x4\_s}', r'\hex{FD}~~248', r'[\V128] \to [\V128]', r'valid-vunop', r'exec-vunop', r'op-trunc_sat_s'),
-    Instruction(r'\I32X4.\TRUNC\K{\_sat\_f32x4\_u}', r'\hex{FD}~~249', r'[\V128] \to [\V128]', r'valid-vunop', r'exec-vunop', r'op-trunc_sat_u'),
-    Instruction(r'\F32X4.\CONVERT\K{\_i32x4\_s}', r'\hex{FD}~~250', r'[\V128] \to [\V128]', r'valid-vunop', r'exec-vunop', r'op-convert_s'),
-    Instruction(r'\F32X4.\CONVERT\K{\_i32x4\_u}', r'\hex{FD}~~251', r'[\V128] \to [\V128]', r'valid-vunop', r'exec-vunop', r'op-convert_u'),
+    Instruction(r'\I32X4.\TRUNC\K{\_sat\_f32x4\_s}', r'\hex{FD}~~248', r'[\V128] \to [\V128]', r'valid-vcvtop', r'exec-vcvtop', r'op-trunc_sat_s'),
+    Instruction(r'\I32X4.\TRUNC\K{\_sat\_f32x4\_u}', r'\hex{FD}~~249', r'[\V128] \to [\V128]', r'valid-vcvtop', r'exec-vcvtop', r'op-trunc_sat_u'),
+    Instruction(r'\F32X4.\CONVERT\K{\_i32x4\_s}', r'\hex{FD}~~250', r'[\V128] \to [\V128]', r'valid-vcvtop', r'exec-vcvtop', r'op-convert_s'),
+    Instruction(r'\F32X4.\CONVERT\K{\_i32x4\_u}', r'\hex{FD}~~251', r'[\V128] \to [\V128]', r'valid-vcvtop', r'exec-vcvtop', r'op-convert_u'),
+    Instruction(r'\I32X4.\VTRUNC\K{\_sat\_f64x2\_s\_zero}', r'\hex{FD}~~85', r'[\V128] \to [\V128]', r'valid-vcvtop', r'exec-vcvtop', r'op-trunc_sat_s'),
+    Instruction(r'\I32X4.\VTRUNC\K{\_sat\_f64x2\_u\_zero}', r'\hex{FD}~~86', r'[\V128] \to [\V128]', r'valid-vcvtop', r'exec-vcvtop', r'op-trunc_sat_u'),
+    Instruction(r'\F64X2.\VCONVERT\K{\_low\_i32x4\_s}', r'\hex{FD}~~83', r'[\V128] \to [\V128]', r'valid-vcvtop', r'exec-vcvtop', r'op-convert_s'),
+    Instruction(r'\F64X2.\VCONVERT\K{\_low\_i32x4\_u}', r'\hex{FD}~~84', r'[\V128] \to [\V128]', r'valid-vcvtop', r'exec-vcvtop', r'op-convert_u'),
+    Instruction(r'\F32X4.\VDEMOTE\K{\_f64x2\_zero}', r'\hex{FD}~~87', r'[\V128] \to [\V128]', r'valid-vcvtop', r'exec-vcvtop', r'op-demote'),
+    Instruction(r'\F64X2.\VPROMOTE\K{\_low\_f32x4}', r'\hex{FD}~~105', r'[\V128] \to [\V128]', r'valid-vcvtop', r'exec-vcvtop', r'op-promote'),
 ]
 
 def ColumnWidth(n):