Am 16.02.20 um 22:28 schrieb Anton Shepelev via fpc-pascal:
But which registers shall be preserved by inline proceudres
and functions?
IIRC (it is 25 years ago :)): sp and bp
In this example from the manual, the SP
register is not preserved within the statement:
It is reset to it's value before the parameters were pushed.
function LongMul(X, Y: Integer): Longint;
inline (
$5A/ {POP AX}
$58/ {POP DX}
$F7/$EA); {IMUL DX}
Does it mean it shall reset SP to a position before the
parameters?
Yes. TP calling conventions means the callee (in this case the inline
code) clears the stack (remove parameters).
What about the other registers -- does Turbo
Pascal take care of them, perhaps enveloping each expansion
of an inline procedure into a POPs and PUSHes?
No.
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