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| author | Julian Brown <julian@codesourcery.com> | 2013-04-11 10:54:13 +0000 |
|---|---|---|
| committer | Julian Brown <julian@codesourcery.com> | 2013-04-11 10:54:13 +0000 |
| commit | f670ad2837603736a24921ba665918e0dffc7eeb (patch) | |
| tree | dac922542cbdf31b499c2a3b50bead5cd6ded614 /gas/expr.h | |
| parent | 2de5269423ac254062466d075ae905803831eb03 (diff) | |
| download | binutils-redhat-f670ad2837603736a24921ba665918e0dffc7eeb.tar.gz | |
gas/
* read.c (convert_to_bignum): Add sign parameter. Use it
instead of X_unsigned to determine sign of resulting bignum.
(emit_expr): Pass extra argument to convert_to_bignum.
(emit_leb128_expr): Use X_extrabit instead of X_unsigned. Pass
X_extrabit to convert_to_bignum.
(parse_bitfield_cons): Set X_extrabit.
* expr.c (make_expr_symbol, expr_build_uconstant, operand):
Initialise X_extrabit field as appropriate.
(add_to_result): New.
(subtract_from_result): New.
(expr): Use above.
* expr.h (expressionS): Add X_extrabit field.
gas/testsuite/
* gas/all/sleb128-2.s: New test.
* gas/all/sleb128-3.s: Likewise.
* gas/all/sleb128-4.s: Likewise.
* gas/all/sleb128-5.s: Likewise.
* gas/all/sleb128-7.s: Likewise.
* gas/all/sleb128-2.d: New.
* gas/all/sleb128-3.d: New.
* gas/all/sleb123-4.d: New.
* gas/all/sleb123-5.d: New.
* gas/all/sleb123-7.d: New.
* gas/all/gas.exp (sleb128-2, sleb128-3, sleb128-4, sleb128-5)
(sleb128-7): Run new tests.
Diffstat (limited to 'gas/expr.h')
| -rw-r--r-- | gas/expr.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/gas/expr.h b/gas/expr.h index cce932dc14..d2cb7fd50f 100644 --- a/gas/expr.h +++ b/gas/expr.h @@ -136,6 +136,11 @@ typedef struct expressionS { when performing arithmetic on these values). FIXME: This field is not set very reliably. */ unsigned int X_unsigned : 1; + /* This is used to implement "word size + 1 bit" arithmetic, so that e.g. + expressions used with .sleb128 directives can use the full range available + for an unsigned word, but can also properly represent all values of a + signed word. */ + unsigned int X_extrabit : 1; /* 7 additional bits can be defined if needed. */ |