We decided to replace many SS instructions with their SIL counterparts.
One common case is frustrating.
D501 C01E C020 CLC HWord,=H'-1' Is it negative one?
A784 000C JE NegOne Branch if yes
replaced with:
E555 C01E FFFF CLHHSI HWord,-1 Is it negative one?
A784 000C JE NegOne Branch if yes
** ASMA320W Immediate field operand may have incorrect sign or magnitude
- -1
I totally understand the warning in this case:
E555 C01E FFFF CLHHSI HWord,131071 Is it negative one?
A784 000C JE NegOne Branch if yes
** ASMA320W Immediate field operand may have incorrect sign or magnitude
- 131071
but I can't understand why -1 generates this warning. The provided value
is validly within the range -32768 through 32767.
We like TYPECHECK(MAGNITUDE) and quite literally assemble tens of
millions of lines of code daily with it enabled and no such warnings are
produced. So we're forced to use ACONTROL like this around this bizarre
case:
PUSH ACONTROL
ACONTROL TYPECHECK(NOMAGNITUDE)
E555 C01E FFFF CLHHSI HWord,-1 Is it negative one?
A784 000C JE NegOne Branch if yes
POP ACONTROL
It seems a ridiculous misunderstanding on the part of the assembler...
--
Phoenix Software International
Edward E. Jaffe
831 Parkview Drive North
El Segundo, CA 90245
https://www.phoenixsoftware.com/
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