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* optimized get_caller_addr and get_caller_frame on i8086 by eliminating the stack frame and using si, instead of bp

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git-svn-id: trunk@25801 -
This commit is contained in:
nickysn 2013-10-16 12:35:05 +00:00
parent aa9fe36fd3
commit 9bf3d1edff
1 changed files with 4 additions and 8 deletions
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12
rtl/i8086/i8086.inc
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@ -71,12 +71,11 @@ end;
{$define FPC_SYSTEM_HAS_GET_CALLER_ADDR} {$define FPC_SYSTEM_HAS_GET_CALLER_ADDR}
function get_caller_addr(framebp:pointer;addr:codepointer=nil):codepointer;nostackframe;assembler; function get_caller_addr(framebp:pointer;addr:codepointer=nil):codepointer;nostackframe;assembler;
asm asm
push bp mov si, sp
mov bp, sp
{$ifdef FPC_X86_CODE_FAR} {$ifdef FPC_X86_CODE_FAR}
xor dx, dx xor dx, dx
{$endif FPC_X86_CODE_FAR} {$endif FPC_X86_CODE_FAR}
mov ax, ss:[bp + 6 + extra_param_offset + extra_param_offset] // framebp mov ax, ss:[si + 6 + extra_param_offset + extra_param_offset] // framebp
or ax, ax or ax, ax
jz @@Lg_a_null jz @@Lg_a_null
xchg ax, bx xchg ax, bx
@ -86,22 +85,19 @@ asm
{$endif FPC_X86_CODE_FAR} {$endif FPC_X86_CODE_FAR}
xchg ax, bx xchg ax, bx
@@Lg_a_null: @@Lg_a_null:
pop bp
end; end;
{$define FPC_SYSTEM_HAS_GET_CALLER_FRAME} {$define FPC_SYSTEM_HAS_GET_CALLER_FRAME}
function get_caller_frame(framebp:pointer;addr:codepointer=nil):pointer;nostackframe;assembler; function get_caller_frame(framebp:pointer;addr:codepointer=nil):pointer;nostackframe;assembler;
asm asm
push bp mov si, sp
mov bp, sp mov ax, ss:[si + 6 + extra_param_offset + extra_param_offset] // framebp
mov ax, ss:[bp + 6 + extra_param_offset + extra_param_offset] // framebp
or ax, ax or ax, ax
jz @@Lgnf_null jz @@Lgnf_null
xchg ax, bx xchg ax, bx
mov bx, [bx] mov bx, [bx]
xchg ax, bx xchg ax, bx
@@Lgnf_null: @@Lgnf_null:
pop bp
end; end;
{TODO: fix, use smallint?} {TODO: fix, use smallint?}