(inst cmp ecx (fixnumize 3))
(inst jmp :e THREE-VALUES)
- (inst mov ebx ebp-tn)
- ;; Save the count, because the loop is going to destroy it.
+ ;; As per the calling convention EBX is expected to point at the SP
+ ;; before the stack frame.
+ (inst lea ebx (make-ea :dword :base ebp-tn
+ :disp (* sp->fp-offset n-word-bytes)))
+
+ ;; Save the count, the return address and restore the frame pointer,
+ ;; because the loop is going to destroy them.
(inst mov edx ecx)
(inst mov eax (make-ea :dword :base ebp-tn
:disp (frame-byte-offset return-pc-save-offset)))
;; Handle the register arg cases.
ZERO-VALUES
- (inst mov ebx ebp-tn)
+ (inst lea ebx (make-ea :dword :base ebp-tn
+ :disp (* sp->fp-offset n-word-bytes)))
(inst mov edx nil-value)
(inst mov edi edx)
(inst mov esi edx)
- (inst lea esp-tn
- (make-ea :dword :base ebx
- :disp (frame-byte-offset ocfp-save-offset)))
+ (inst mov esp-tn ebp-tn)
(inst stc)
(inst pop ebp-tn)
(inst ret)
;; check for this case when size > speed.
ONE-VALUE
(loadw edx esi -1)
- (inst lea esp-tn
- (make-ea :dword :base ebp-tn
- :disp (frame-byte-offset ocfp-save-offset)))
+ (inst mov esp-tn ebp-tn)
(inst clc)
(inst pop ebp-tn)
(inst ret)
TWO-VALUES
- (inst mov ebx ebp-tn)
+ (inst lea ebx (make-ea :dword :base ebp-tn
+ :disp (* sp->fp-offset n-word-bytes)))
(loadw edx esi -1)
(loadw edi esi -2)
(inst mov esi nil-value)
- (inst lea esp-tn
- (make-ea :dword :base ebx
- :disp (frame-byte-offset ocfp-save-offset)))
+ (inst mov esp-tn ebp-tn)
(inst stc)
(inst pop ebp-tn)
(inst ret)
THREE-VALUES
- (inst mov ebx ebp-tn)
+ (inst lea ebx (make-ea :dword :base ebp-tn
+ :disp (* sp->fp-offset n-word-bytes)))
(loadw edx esi -1)
(loadw edi esi -2)
(loadw esi esi -3)
- (inst lea esp-tn
- (make-ea :dword :base ebx
- :disp (frame-byte-offset ocfp-save-offset)))
+ (inst mov esp-tn ebp-tn)
(inst stc)
(inst pop ebp-tn)
(inst ret))
;; Clear most of the stack.
(inst lea esp-tn
- (make-ea :dword :base ebp-tn :disp (* -3 n-word-bytes)))
+ (make-ea :dword :base ebp-tn :disp (* (- sp->fp-offset 3) n-word-bytes)))
;; Push the return-pc so it looks like we just called.
(pushw ebp-tn (frame-word-offset return-pc-save-offset))