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comparison docs/manual.docbook.sgml @ 455:cad5937314cb
Add operandsizewarning pragma
Add operandsizewarning pragma that will raise warnings for certain operands
if the operand size could be smaller. (Long branch used instead of short
branch, for instance.)
| author | William Astle <lost@l-w.ca> |
|---|---|
| date | Fri, 16 Feb 2018 22:53:46 -0700 |
| parents | 6b19418c465c |
| children | e97f9a302c6a |
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| 454:ffdef8994f13 | 455:cad5937314cb |
|---|---|
| 1968 <para>It should be noted that the presence or absence of this pragma | 1968 <para>It should be noted that the presence or absence of this pragma |
| 1969 will not change the correctness of the generated code unless cycle counts | 1969 will not change the correctness of the generated code unless cycle counts |
| 1970 or byte counts are critical (which they usually are not). It also will | 1970 or byte counts are critical (which they usually are not). It also will |
| 1971 not override the operand size override prefixes (< and >). It only | 1971 not override the operand size override prefixes (< and >). It only |
| 1972 applies when the assembler is left to guess what the operand size is.</para> | 1972 applies when the assembler is left to guess what the operand size is.</para> |
| 1973 | |
| 1974 </listitem> | |
| 1975 </varlistentry> | |
| 1976 | |
| 1977 <varlistentry> | |
| 1978 <term>operandsizewarning</term> | |
| 1979 <listitem> | |
| 1980 | |
| 1981 <para>Enabling this pragma will cause LWASM to show a warning when it | |
| 1982 detects that a smaller addressing mode could be used for an instruction. | |
| 1983 This is particularly useful for finding places where long branches are used | |
| 1984 where short branches could be used instead. It will also show the warnings | |
| 1985 for indexing offsets (regardless of whether the operand size is | |
| 1986 forced).</para> | |
| 1987 | |
| 1988 <para>As of LWASM 4.16, no other checks are performed.</para> | |
| 1973 | 1989 |
| 1974 </listitem> | 1990 </listitem> |
| 1975 </varlistentry> | 1991 </varlistentry> |
| 1976 | 1992 |
| 1977 <varlistentry> | 1993 <varlistentry> |