spec/iasm.dd: Expand definition of Register and Register64

These were previously defined as a set of tokens loosely arranged in a
table. Unfortunately, this layout was ambiguous, and if interpreted
literally (or by a program) in the same way as the rest of the
grammar, they would mean that the tokens on the same line actually
have to appear one after another in the source file in the specified
order.

As such, we gave to sacrifice a bit of human-readability to achieve
machine readability. If necessary, the former can be later improved
using CSS or additional macros, such as MULTICOLS.

Author: CyberShadow

spec/iasm.dd

@@ -183,44 +183,180 @@ $(H2 $(LNAME2 opcodes, Opcodes))
 
 $(GRAMMAR
 $(GNAME Register):
-    $(D AL) $(D AH) $(D AX) $(D EAX)
-    $(D BL) $(D BH) $(D BX) $(D EBX)
-    $(D CL) $(D CH) $(D CX) $(D ECX)
-    $(D DL) $(D DH) $(D DX) $(D EDX)
-    $(D BP) $(D EBP)
-    $(D SP) $(D ESP)
-    $(D DI) $(D EDI)
-    $(D SI) $(D ESI)
-    $(D ES) $(D CS) $(D SS) $(D DS) $(D GS) $(D FS)
-    $(D CR0) $(D CR2) $(D CR3) $(D CR4)
-    $(D DR0) $(D DR1) $(D DR2) $(D DR3) $(D DR6) $(D DR7)
-    $(D TR3) $(D TR4) $(D TR5) $(D TR6) $(D TR7)
+    $(D AL)
+    $(D AH)
+    $(D AX)
+    $(D EAX)
+
+    $(D BL)
+    $(D BH)
+    $(D BX)
+    $(D EBX)
+
+    $(D CL)
+    $(D CH)
+    $(D CX)
+    $(D ECX)
+
+    $(D DL)
+    $(D DH)
+    $(D DX)
+    $(D EDX)
+
+    $(D BP)
+    $(D EBP)
+
+    $(D SP)
+    $(D ESP)
+
+    $(D DI)
+    $(D EDI)
+
+    $(D SI)
+    $(D ESI)
+
+    $(D ES)
+    $(D CS)
+    $(D SS)
+    $(D DS)
+    $(D GS)
+    $(D FS)
+
+    $(D CR0)
+    $(D CR2)
+    $(D CR3)
+    $(D CR4)
+
+    $(D DR0)
+    $(D DR1)
+    $(D DR2)
+    $(D DR3)
+    $(D DR6)
+    $(D DR7)
+
+    $(D TR3)
+    $(D TR4)
+    $(D TR5)
+    $(D TR6)
+    $(D TR7)
+
     $(D ST)
-    $(D ST(0)) $(D ST(1)) $(D ST(2)) $(D ST(3)) $(D ST(4)) $(D ST(5)) $(D ST(6)) $(D ST(7))
-    $(D MM0)  $(D MM1)  $(D MM2)  $(D MM3)  $(D MM4)  $(D MM5)  $(D MM6)  $(D MM7)
-    $(D XMM0) $(D XMM1) $(D XMM2) $(D XMM3) $(D XMM4) $(D XMM5) $(D XMM6) $(D XMM7)
+
+    $(D ST(0))
+    $(D ST(1))
+    $(D ST(2))
+    $(D ST(3))
+    $(D ST(4))
+    $(D ST(5))
+    $(D ST(6))
+    $(D ST(7))
+
+    $(D MM0)
+    $(D MM1)
+    $(D MM2)
+    $(D MM3)
+    $(D MM4)
+    $(D MM5)
+    $(D MM6)
+    $(D MM7)
+
+    $(D XMM0)
+    $(D XMM1)
+    $(D XMM2)
+    $(D XMM3)
+    $(D XMM4)
+    $(D XMM5)
+    $(D XMM6)
+    $(D XMM7)
 )
 
     $(P $(D x86_64) adds these additional registers.)
 
 $(GRAMMAR
 $(GNAME Register64):
-    $(D RAX)  $(D RBX)  $(D RCX)  $(D RDX)
-    $(D BPL)  $(D RBP)
-    $(D SPL)  $(D RSP)
-    $(D DIL)  $(D RDI)
-    $(D SIL)  $(D RSI)
-    $(D R8B)  $(D R8W)  $(D R8D)  $(D R8)
-    $(D R9B)  $(D R9W)  $(D R9D)  $(D R9)
-    $(D R10B) $(D R10W) $(D R10D) $(D R10)
-    $(D R11B) $(D R11W) $(D R11D) $(D R11)
-    $(D R12B) $(D R12W) $(D R12D) $(D R12)
-    $(D R13B) $(D R13W) $(D R13D) $(D R13)
-    $(D R14B) $(D R14W) $(D R14D) $(D R14)
-    $(D R15B) $(D R15W) $(D R15D) $(D R15)
-    $(D XMM8) $(D XMM9) $(D XMM10) $(D XMM11) $(D XMM12) $(D XMM13) $(D XMM14) $(D XMM15)
-    $(D YMM0) $(D YMM1) $(D YMM2)  $(D YMM3)  $(D YMM4)  $(D YMM5)  $(D YMM6)  $(D YMM7)
-    $(D YMM8) $(D YMM9) $(D YMM10) $(D YMM11) $(D YMM12) $(D YMM13) $(D YMM14) $(D YMM15)
+    $(D RAX)
+    $(D RBX)
+    $(D RCX)
+    $(D RDX)
+
+    $(D BPL)
+    $(D RBP)
+
+    $(D SPL)
+    $(D RSP)
+
+    $(D DIL)
+    $(D RDI)
+
+    $(D SIL)
+    $(D RSI)
+
+    $(D R8B)
+    $(D R8W)
+    $(D R8D)
+    $(D R8)
+
+    $(D R9B)
+    $(D R9W)
+    $(D R9D)
+    $(D R9)
+
+    $(D R10B)
+    $(D R10W)
+    $(D R10D)
+    $(D R10)
+
+    $(D R11B)
+    $(D R11W)
+    $(D R11D)
+    $(D R11)
+
+    $(D R12B)
+    $(D R12W)
+    $(D R12D)
+    $(D R12)
+
+    $(D R13B)
+    $(D R13W)
+    $(D R13D)
+    $(D R13)
+
+    $(D R14B)
+    $(D R14W)
+    $(D R14D)
+    $(D R14)
+
+    $(D R15B)
+    $(D R15W)
+    $(D R15D)
+    $(D R15)
+
+    $(D XMM8)
+    $(D XMM9)
+    $(D XMM10)
+    $(D XMM11)
+    $(D XMM12)
+    $(D XMM13)
+    $(D XMM14)
+    $(D XMM15)
+
+    $(D YMM0)
+    $(D YMM1)
+    $(D YMM2)
+    $(D YMM3)
+    $(D YMM4)
+    $(D YMM5)
+    $(D YMM6)
+    $(D YMM7)
+
+    $(D YMM8)
+    $(D YMM9)
+    $(D YMM10)
+    $(D YMM11)
+    $(D YMM12)
+    $(D YMM13)
+    $(D YMM14)
+    $(D YMM15)
 )
 
 $(H3 $(LNAME2 special_cases, Special Cases))