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* x86 assembler: write REX prefix before the first literal byte of instruction (this becomes possible once the instruction table has all $66,$F2,$F3 prefixes changed to non-literal control codes). This way it is no longer necessary to manually specify position of REX in every instruction entry (code \323 becomes obsolete), and the situation when REX is not written (IE 200603191) is hopefully gone forever.

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git-svn-id: trunk@17456 -
This commit is contained in:
sergei 2011-05-14 16:02:31 +00:00
parent 3064726d71
commit 86d0c7f4c5
1 changed files with 10 additions and 26 deletions
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36
compiler/x86/aasmcpu.pas
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@ -2080,6 +2080,9 @@ implementation
break;
1,2,3 :
begin
{$ifdef x86_64}
maybewriterex;
{$endif x86_64}
objdata.writebytes(codes^,c);
inc(codes,c);
end;
@ -2118,6 +2121,9 @@ implementation
end;
8,9,10 :
begin
{$ifdef x86_64}
maybewriterex;
{$endif x86_64}
bytes[0]:=ord(codes^)+regval(oper[c-8]^.reg);
inc(codes);
objdata.writebytes(bytes,1);
@ -2259,30 +2265,18 @@ implementation
Message(asmw_e_64bit_not_supported);
{$endif x86_64}
end;
{$ifdef x86_64}
maybewriterex;
{$endif x86_64}
end;
211,
213 :
begin
{$ifdef x86_64}
maybewriterex;
{$endif x86_64}
end;
213 : {no action needed};
212, 241 :
begin
bytes[0]:=$66;
objdata.writebytes(bytes,1);
{$ifdef x86_64}
maybewriterex;
{$endif x86_64}
end;
214 :
begin
{$ifdef x86_64}
maybewriterex;
{$else x86_64}
{$ifndef x86_64}
Message(asmw_e_64bit_not_supported);
{$endif x86_64}
end;
@ -2290,17 +2284,11 @@ implementation
begin
bytes[0]:=$f3;
objdata.writebytes(bytes,1);
{$ifdef x86_64}
maybewriterex;
{$endif x86_64}
end;
220 :
begin
bytes[0]:=$f2;
objdata.writebytes(bytes,1);
{$ifdef x86_64}
maybewriterex;
{$endif x86_64}
end;
221:
;
@ -2309,11 +2297,7 @@ implementation
217,218 :
begin
{ these are dissambler hints or 32 bit prefixes which
are not needed
It's useful to write rex :) (FK) }
{$ifdef x86_64}
maybewriterex;
{$endif x86_64}
are not needed }
end;
31,
48,49,50 :