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GAS: Replace macro LITERAL_PREFIXDOLLAR_HEX with a runtime value. 

In an upcoming commit, I need to be able to set the prefix used
to introduce hexadecimal literal constants using a command line
flag.   This is not currently possible, because the switch which
determines this (LITERAL_PREFIXDOLLAR_HEX) is a macro set at
build time.

This change substitutes it for a variable to be set at start up.

gas/ChangeLog:
    * expr.c (literal_prefix_dollar_hex): New variable.
    (operand)[case '$']: Use the new variable instead of the old macro.
    Also, move this instance of "case '$'" next to the other one, and
    enable it only in the complementary proprocessor case.
    * expr.h (literal_prefix_dollar_hex): Declare it.
    * config/tc-epiphany.c (md_begin): Assign literal_prefix_dollar_hex.
    * config/tc-ip2k.c:      ditto
    * config/tc-mt.c:        ditto
    * config/tc-epiphany.h (LITERAL_PREFIXDOLLAR_HEX): Remove macro definition.
    * config/tc-ip2k.h:      ditto
    * config/tc-mt.h:        ditto
This commit is contained in:
John Darrington 2019-05-21 10:11:40 +02:00
parent 7622049e0b
commit e2d1595531
9 changed files with 39 additions and 13 deletions
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14
gas/ChangeLog
View File

@ -1,3 +1,17 @@
2019-05-21 John Darrington <john@darrington.wattle.id.au>
* expr.c (literal_prefix_dollar_hex): New variable.
(operand)[case '$']: Use the new variable instead of the old macro.
Also, move this instance of "case '$'" next to the other one, and
enable it only in the complementary proprocessor case.
* expr.h (literal_prefix_dollar_hex): Declare it.
* config/tc-epiphany.c (md_begin): Assign literal_prefix_dollar_hex.
* config/tc-ip2k.c: ditto
* config/tc-mt.c: ditto
* config/tc-epiphany.h (LITERAL_PREFIXDOLLAR_HEX): Remove macro definition.
* config/tc-ip2k.h: ditto
* config/tc-mt.h: ditto
2019-05-20 Faraz Shahbazker <fshahbazker@wavecomp.com>
PR 14798

2
gas/config/tc-epiphany.c
View File

@ -145,6 +145,8 @@ md_begin (void)
/* Set the machine type. */
bfd_default_set_arch_mach (stdoutput, bfd_arch_epiphany, bfd_mach_epiphany32);
literal_prefix_dollar_hex = TRUE;
}
valueT

1
gas/config/tc-epiphany.h
View File

@ -37,7 +37,6 @@
/* We don't need to handle .word strangely. */
#define WORKING_DOT_WORD
#define LITERAL_PREFIXDOLLAR_HEX
#define LITERAL_PREFIXPERCENT_BIN
#define DOUBLESLASH_LINE_COMMENTS

2
gas/config/tc-ip2k.c
View File

@ -160,6 +160,8 @@ md_begin (void)
/* Set the machine type. */
bfd_default_set_arch_mach (stdoutput, bfd_arch_ip2k, ip2k_mach);
literal_prefix_dollar_hex = TRUE;
}

1
gas/config/tc-ip2k.h
View File

@ -38,7 +38,6 @@
/* We don't need to handle .word strangely. */
#define WORKING_DOT_WORD
#define LITERAL_PREFIXDOLLAR_HEX
#define LITERAL_PREFIXPERCENT_BIN
#define DOUBLESLASH_LINE_COMMENTS

2
gas/config/tc-mt.c
View File

@ -178,6 +178,8 @@ md_begin (void)
/* Set the machine type. */
bfd_default_set_arch_mach (stdoutput, bfd_arch_mt, mt_mach);
literal_prefix_dollar_hex = TRUE;
}
void

1
gas/config/tc-mt.h
View File

@ -41,7 +41,6 @@
/* All mt instructions are multiples of 32 bits. */
#define DWARF2_LINE_MIN_INSN_LENGTH 4
#define LITERAL_PREFIXDOLLAR_HEX
#define LITERAL_PREFIXPERCENT_BIN
#define md_apply_fix mt_apply_fix

27
gas/expr.c
View File

@ -35,6 +35,8 @@
#define CHAR_BIT 8
#endif
bfd_boolean literal_prefix_dollar_hex = FALSE;
static void floating_constant (expressionS * expressionP);
static valueT generic_bignum_to_int32 (void);
#ifdef BFD64
@ -778,15 +780,6 @@ operand (expressionS *expressionP, enum expr_mode mode)
expressionP);
break;
#ifdef LITERAL_PREFIXDOLLAR_HEX
case '$':
/* $L is the start of a local label, not a hex constant. */
if (* input_line_pointer == 'L')
goto isname;
integer_constant (16, expressionP);
break;
#endif
#ifdef LITERAL_PREFIXPERCENT_BIN
case '%':
integer_constant (2, expressionP);
@ -1114,7 +1107,21 @@ operand (expressionS *expressionP, enum expr_mode mode)
}
break;
#if defined (DOLLAR_DOT) || defined (TC_M68K)
#if !defined (DOLLAR_DOT) && !defined (TC_M68K)
case '$':
if (literal_prefix_dollar_hex)
{
/* $L is the start of a local label, not a hex constant. */
if (* input_line_pointer == 'L')
goto isname;
integer_constant (16, expressionP);
}
else
{
goto isname;
}
break;
#else
case '$':
/* '$' is the program counter when in MRI mode, or when
DOLLAR_DOT is defined. */

2
gas/expr.h
View File

@ -187,3 +187,5 @@ extern symbolS *expr_build_uconstant (offsetT);
extern symbolS *expr_build_dot (void);
int resolve_expression (expressionS *);
extern bfd_boolean literal_prefix_dollar_hex;