Update Yasm to 1.2.0 (Yasm Part 1/3)

third_party/yasm/patched-yasm/modules/parsers/nasm/nasm-std.mac

 ; Standard macro set for NASM -*- nasm -*-
 
 ; Note that although some user-level forms of directives are defined
 ; here, not all of them are: the user-level form of a format-specific
 ; directive should be defined in the module for that directive.
 
 ; These two need to be defined, though the actual definitions will
 ; be constantly updated during preprocessing.
 %define __FILE__
 %define __LINE__
 
 %define __SECT__ [section .text] ; it ought to be defined, even if as nothing
 
 %imacro section 1+.nolist
 %define __SECT__ [section %1]
           __SECT__
 %endmacro
 %imacro segment 1+.nolist
 %define __SECT__ [segment %1]
           __SECT__
 %endmacro
 
 %imacro absolute 1+.nolist
 %define __SECT__ [absolute %1]
           __SECT__
 %endmacro
 
-%imacro struc 1.nolist
+%imacro struc 1-2.nolist 0
 %push struc
 %define %$strucname %1
-[absolute 0]
+[absolute %2]
 %$strucname:                    ; allow definition of `.member' to work sanely
 %endmacro 
 %imacro endstruc 0.nolist
-%{$strucname}_size:
+%{$strucname}_size EQU $ - %$strucname
 %pop
 __SECT__
 %endmacro
 
 %imacro istruc 1.nolist
 %push istruc
 %define %$strucname %1
 %$strucstart:
 %endmacro
 %imacro at 1-2+.nolist
@@ skipping 54 matching lines @@
 %imacro cpu 1+.nolist
 [cpu %1]
 %endmacro
 
 %imacro default 1+.nolist
 [default %1]
 %endmacro
 
 ; NASM compatibility shim
 %define __OUTPUT_FORMAT__ __YASM_OBJFMT__