You should have received a copy of the GNU General Public License
along with GAS; see the file COPYING. If not, write to
- the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
+ the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/*
* This is really a branch office of as-read.c. I split it out to clearly
static void floating_constant PARAMS ((expressionS * expressionP));
static void integer_constant PARAMS ((int radix, expressionS * expressionP));
+static void mri_char_constant PARAMS ((expressionS *));
static void clean_up_expression PARAMS ((expressionS * expressionP));
extern const char EXP_CHARS[], FLT_CHARS[];
expressionS *expressionP;
{
char *start; /* start of number. */
+ char *suffix = NULL;
char c;
-
valueT number; /* offset or (absolute) value */
short int digit; /* value of next digit in current radix */
short int maxdig = 0;/* highest permitted digit value. */
#define valuesize 32
#endif
+ if (flag_mri && radix == 0)
+ {
+ int flt = 0;
+
+ /* In MRI mode, the number may have a suffix indicating the
+ radix. For that matter, it might actually be a floating
+ point constant. */
+ for (suffix = input_line_pointer; isalnum (*suffix); suffix++)
+ {
+ if (*suffix == 'e' || *suffix == 'E')
+ flt = 1;
+ }
+
+ if (suffix == input_line_pointer)
+ {
+ radix = 10;
+ suffix = NULL;
+ }
+ else
+ {
+ c = *--suffix;
+ if (islower (c))
+ c = toupper (c);
+ if (c == 'B')
+ radix = 2;
+ else if (c == 'D')
+ radix = 10;
+ else if (c == 'O' || c == 'Q')
+ radix = 8;
+ else if (c == 'H')
+ radix = 16;
+ else if (suffix[1] == '.' || c == 'E' || flt)
+ {
+ floating_constant (expressionP);
+ return;
+ }
+ else
+ {
+ radix = 10;
+ suffix = NULL;
+ }
+ }
+ }
+
switch (radix)
{
case 2:
number = leader - generic_bignum + 1; /* number of littlenums in the bignum. */
}
}
+
+ if (flag_mri && suffix != NULL && input_line_pointer - 1 == suffix)
+ c = *input_line_pointer++;
+
if (small)
{
/*
* than checking for strict canonical form. syntax sux!
*/
- switch (c)
+ if (LOCAL_LABELS_FB && c == 'b')
{
+ /*
+ * backward ref to local label.
+ * because it is backward, expect it to be defined.
+ */
+ /* Construct a local label. */
+ name = fb_label_name ((int) number, 0);
-#ifdef LOCAL_LABELS_FB
- case 'b':
- {
- /*
- * backward ref to local label.
- * because it is backward, expect it to be defined.
- */
- /* Construct a local label. */
- name = fb_label_name ((int) number, 0);
-
- /* seen before, or symbol is defined: ok */
- symbolP = symbol_find (name);
- if ((symbolP != NULL) && (S_IS_DEFINED (symbolP)))
- {
- /* local labels are never absolute. don't waste time
- checking absoluteness. */
- know (SEG_NORMAL (S_GET_SEGMENT (symbolP)));
-
- expressionP->X_op = O_symbol;
- expressionP->X_add_symbol = symbolP;
- }
- else
- {
- /* either not seen or not defined. */
- /* @@ Should print out the original string instead of
- the parsed number. */
- as_bad ("backw. ref to unknown label \"%d:\", 0 assumed.",
- (int) number);
- expressionP->X_op = O_constant;
- }
+ /* seen before, or symbol is defined: ok */
+ symbolP = symbol_find (name);
+ if ((symbolP != NULL) && (S_IS_DEFINED (symbolP)))
+ {
+ /* local labels are never absolute. don't waste time
+ checking absoluteness. */
+ know (SEG_NORMAL (S_GET_SEGMENT (symbolP)));
- expressionP->X_add_number = 0;
- break;
- } /* case 'b' */
+ expressionP->X_op = O_symbol;
+ expressionP->X_add_symbol = symbolP;
+ }
+ else
+ {
+ /* either not seen or not defined. */
+ /* @@ Should print out the original string instead of
+ the parsed number. */
+ as_bad ("backw. ref to unknown label \"%d:\", 0 assumed.",
+ (int) number);
+ expressionP->X_op = O_constant;
+ }
- case 'f':
- {
- /*
- * forward reference. expect symbol to be undefined or
- * unknown. undefined: seen it before. unknown: never seen
- * it before.
- * construct a local label name, then an undefined symbol.
- * don't create a xseg frag for it: caller may do that.
- * just return it as never seen before.
- */
- name = fb_label_name ((int) number, 1);
- symbolP = symbol_find_or_make (name);
- /* we have no need to check symbol properties. */
+ expressionP->X_add_number = 0;
+ } /* case 'b' */
+ else if (LOCAL_LABELS_FB && c == 'f')
+ {
+ /*
+ * forward reference. expect symbol to be undefined or
+ * unknown. undefined: seen it before. unknown: never seen
+ * it before.
+ * construct a local label name, then an undefined symbol.
+ * don't create a xseg frag for it: caller may do that.
+ * just return it as never seen before.
+ */
+ name = fb_label_name ((int) number, 1);
+ symbolP = symbol_find_or_make (name);
+ /* we have no need to check symbol properties. */
#ifndef many_segments
- /* since "know" puts its arg into a "string", we
- can't have newlines in the argument. */
- know (S_GET_SEGMENT (symbolP) == undefined_section || S_GET_SEGMENT (symbolP) == text_section || S_GET_SEGMENT (symbolP) == data_section);
+ /* since "know" puts its arg into a "string", we
+ can't have newlines in the argument. */
+ know (S_GET_SEGMENT (symbolP) == undefined_section || S_GET_SEGMENT (symbolP) == text_section || S_GET_SEGMENT (symbolP) == data_section);
#endif
- expressionP->X_op = O_symbol;
- expressionP->X_add_symbol = symbolP;
- expressionP->X_add_number = 0;
+ expressionP->X_op = O_symbol;
+ expressionP->X_add_symbol = symbolP;
+ expressionP->X_add_number = 0;
+ } /* case 'f' */
+ else if (LOCAL_LABELS_DOLLAR && c == '$')
+ {
+ /* If the dollar label is *currently* defined, then this is just
+ another reference to it. If it is not *currently* defined,
+ then this is a fresh instantiation of that number, so create
+ it. */
- break;
- } /* case 'f' */
+ if (dollar_label_defined ((long) number))
+ {
+ name = dollar_label_name ((long) number, 0);
+ symbolP = symbol_find (name);
+ know (symbolP != NULL);
+ }
+ else
+ {
+ name = dollar_label_name ((long) number, 1);
+ symbolP = symbol_find_or_make (name);
+ }
-#endif /* LOCAL_LABELS_FB */
+ expressionP->X_op = O_symbol;
+ expressionP->X_add_symbol = symbolP;
+ expressionP->X_add_number = 0;
+ } /* case '$' */
+ else
+ {
+ expressionP->X_op = O_constant;
+#ifdef TARGET_WORD_SIZE
+ /* Sign extend NUMBER. */
+ number |= (-(number >> (TARGET_WORD_SIZE - 1))) << (TARGET_WORD_SIZE - 1);
+#endif
+ expressionP->X_add_number = number;
+ input_line_pointer--; /* restore following character. */
+ } /* really just a number */
+ }
+ else
+ {
+ /* not a small number */
+ expressionP->X_op = O_big;
+ expressionP->X_add_number = number; /* number of littlenums */
+ input_line_pointer--; /*->char following number. */
+ }
+}
-#ifdef LOCAL_LABELS_DOLLAR
+/* Parse an MRI multi character constant. */
- case '$':
- {
+static void
+mri_char_constant (expressionP)
+ expressionS *expressionP;
+{
+ int i;
- /* If the dollar label is *currently* defined, then this is just
- another reference to it. If it is not *currently* defined,
- then this is a fresh instantiation of that number, so create
- it. */
+ if (*input_line_pointer == '\''
+ && input_line_pointer[1] != '\'')
+ {
+ expressionP->X_op = O_constant;
+ expressionP->X_add_number = 0;
+ return;
+ }
- if (dollar_label_defined ((long) number))
- {
- name = dollar_label_name ((long) number, 0);
- symbolP = symbol_find (name);
- know (symbolP != NULL);
- }
- else
- {
- name = dollar_label_name ((long) number, 1);
- symbolP = symbol_find_or_make (name);
- }
+ /* In order to get the correct byte ordering, we must build the
+ number in reverse. */
+ for (i = SIZE_OF_LARGE_NUMBER - 1; i >= 0; i--)
+ {
+ int j;
- expressionP->X_op = O_symbol;
- expressionP->X_add_symbol = symbolP;
- expressionP->X_add_number = 0;
+ generic_bignum[i] = 0;
+ for (j = 0; j < CHARS_PER_LITTLENUM; j++)
+ {
+ if (*input_line_pointer == '\'')
+ {
+ if (input_line_pointer[1] != '\'')
+ break;
+ ++input_line_pointer;
+ }
+ generic_bignum[i] <<= 8;
+ generic_bignum[i] += *input_line_pointer;
+ ++input_line_pointer;
+ }
- break;
- } /* case '$' */
+ if (i < SIZE_OF_LARGE_NUMBER - 1)
+ {
+ /* If there is more than one littlenum, left justify the
+ last one to make it match the earlier ones. If there is
+ only one, we can just use the value directly. */
+ for (; j < CHARS_PER_LITTLENUM; j++)
+ generic_bignum[i] <<= 8;
+ }
-#endif /* LOCAL_LABELS_DOLLAR */
+ if (*input_line_pointer == '\''
+ && input_line_pointer[1] != '\'')
+ break;
+ }
- default:
- {
- expressionP->X_op = O_constant;
- expressionP->X_add_number = number;
- input_line_pointer--; /* restore following character. */
- break;
- } /* really just a number */
+ if (i < 0)
+ {
+ as_bad ("Character constant too large");
+ i = 0;
+ }
- } /* switch on char following the number */
+ if (i > 0)
+ {
+ int c;
+ int j;
+ c = SIZE_OF_LARGE_NUMBER - i;
+ for (j = 0; j < c; j++)
+ generic_bignum[j] = generic_bignum[i + j];
+ i = c;
}
- else
+
+ know (LITTLENUM_NUMBER_OF_BITS == 16);
+ if (i > 2)
{
- /* not a small number */
expressionP->X_op = O_big;
- expressionP->X_add_number = number; /* number of littlenums */
- input_line_pointer--; /*->char following number. */
+ expressionP->X_add_number = i;
+ }
+ else
+ {
+ expressionP->X_op = O_constant;
+ if (i < 2)
+ expressionP->X_add_number = generic_bignum[0] & LITTLENUM_MASK;
+ else
+ expressionP->X_add_number =
+ (((generic_bignum[1] & LITTLENUM_MASK)
+ << LITTLENUM_NUMBER_OF_BITS)
+ | (generic_bignum[0] & LITTLENUM_MASK));
}
-}
+ /* Skip the final closing quote. */
+ ++input_line_pointer;
+}
/*
* Summary of operand().
switch (c)
{
-#ifdef MRI
- case '%':
- integer_constant (2, expressionP);
- break;
- case '@':
- integer_constant (8, expressionP);
- break;
- case '$':
- integer_constant (16, expressionP);
- break;
-#endif
case '1':
case '2':
case '3':
case '9':
input_line_pointer--;
- integer_constant (10, expressionP);
+ integer_constant (flag_mri ? 0 : 10, expressionP);
break;
case '0':
/* non-decimal radix */
+ if (flag_mri)
+ {
+ char *s;
+
+ /* Check for a hex constant. */
+ for (s = input_line_pointer; hex_p (*s); s++)
+ ;
+ if (*s == 'h' || *s == 'H')
+ {
+ --input_line_pointer;
+ integer_constant (0, expressionP);
+ break;
+ }
+ }
+
c = *input_line_pointer;
switch (c)
{
-
default:
+ default_case:
if (c && strchr (FLT_CHARS, c))
{
input_line_pointer++;
case 'x':
case 'X':
+ if (flag_mri)
+ goto default_case;
input_line_pointer++;
integer_constant (16, expressionP);
break;
case 'b':
-#ifdef LOCAL_LABELS_FB
- switch (input_line_pointer[1])
+ if (LOCAL_LABELS_FB)
{
- case '+':
- case '-':
- /* If unambiguously a difference expression, treat it as
- one by indicating a label; otherwise, it's always a
- binary number. */
- {
- char *cp = input_line_pointer + 1;
- while (strchr ("0123456789", *++cp))
- ;
- if (*cp == 'b' || *cp == 'f')
+ switch (input_line_pointer[1])
+ {
+ case '+':
+ case '-':
+ /* If unambiguously a difference expression, treat
+ it as one by indicating a label; otherwise, it's
+ always a binary number. */
+ {
+ char *cp = input_line_pointer + 1;
+ while (strchr ("0123456789", *++cp))
+ ;
+ if (*cp == 'b' || *cp == 'f')
+ goto is_0b_label;
+ }
+ goto is_0b_binary;
+ case '0': case '1':
+ /* Some of our code elsewhere does permit digits
+ greater than the expected base; for consistency,
+ do the same here. */
+ case '2': case '3': case '4': case '5':
+ case '6': case '7': case '8': case '9':
+ goto is_0b_binary;
+ case 0:
goto is_0b_label;
- }
- goto is_0b_binary;
- case '0': case '1':
- /* Some of our code elsewhere does permit digits greater
- than the expected base; for consistency, do the same
- here. */
- case '2': case '3': case '4': case '5':
- case '6': case '7': case '8': case '9':
- goto is_0b_binary;
- case 0:
- goto is_0b_label;
- default:
- goto is_0b_label;
+ default:
+ goto is_0b_label;
+ }
+ is_0b_label:
+ input_line_pointer--;
+ integer_constant (10, expressionP);
+ break;
+ is_0b_binary:
+ ;
}
- is_0b_label:
- input_line_pointer--;
- integer_constant (10, expressionP);
- break;
- is_0b_binary:
-#endif
case 'B':
input_line_pointer++;
+ if (flag_mri)
+ goto default_case;
integer_constant (2, expressionP);
break;
case '5':
case '6':
case '7':
- integer_constant (8, expressionP);
+ integer_constant (flag_mri ? 0 : 8, expressionP);
break;
case 'f':
-#ifdef LOCAL_LABELS_FB
- /* If it says "0f" and it could possibly be a floating point
- number, make it one. Otherwise, make it a local label,
- and try to deal with parsing the rest later. */
- if (!input_line_pointer[1]
- || (is_end_of_line[0xff & input_line_pointer[1]]))
- goto is_0f_label;
- {
- char *cp = input_line_pointer + 1;
- int r = atof_generic (&cp, ".", EXP_CHARS,
- &generic_floating_point_number);
- switch (r)
+ if (LOCAL_LABELS_FB)
+ {
+ /* If it says "0f" and it could possibly be a floating point
+ number, make it one. Otherwise, make it a local label,
+ and try to deal with parsing the rest later. */
+ if (!input_line_pointer[1]
+ || (is_end_of_line[0xff & input_line_pointer[1]]))
+ goto is_0f_label;
{
- case 0:
- case ERROR_EXPONENT_OVERFLOW:
- if (*cp == 'f' || *cp == 'b')
- /* looks like a difference expression */
- goto is_0f_label;
- else
- goto is_0f_float;
- default:
- as_fatal ("expr.c(operand): bad atof_generic return val %d",
- r);
+ char *cp = input_line_pointer + 1;
+ int r = atof_generic (&cp, ".", EXP_CHARS,
+ &generic_floating_point_number);
+ switch (r)
+ {
+ case 0:
+ case ERROR_EXPONENT_OVERFLOW:
+ if (*cp == 'f' || *cp == 'b')
+ /* looks like a difference expression */
+ goto is_0f_label;
+ else
+ goto is_0f_float;
+ default:
+ as_fatal ("expr.c(operand): bad atof_generic return val %d",
+ r);
+ }
}
- }
-
- /* Okay, now we've sorted it out. We resume at one of these
- two labels, depending on what we've decided we're probably
- looking at. */
- is_0f_label:
- input_line_pointer--;
- integer_constant (10, expressionP);
- break;
- is_0f_float:
- /* fall through */
-#endif
+ /* Okay, now we've sorted it out. We resume at one of these
+ two labels, depending on what we've decided we're probably
+ looking at. */
+ is_0f_label:
+ input_line_pointer--;
+ integer_constant (10, expressionP);
+ break;
+
+ is_0f_float:
+ /* fall through */
+ ;
+ }
case 'd':
case 'D':
expressionP->X_add_number = -(isupper (c) ? tolower (c) : c);
break;
-#ifdef LOCAL_LABELS_DOLLAR
case '$':
- integer_constant (10, expressionP);
- break;
-#endif
+ if (LOCAL_LABELS_DOLLAR)
+ {
+ integer_constant (10, expressionP);
+ break;
+ }
+ else
+ goto default_case;
}
break;
/* didn't begin with digit & not a name */
segment = expression (expressionP);
/* Expression() will pass trailing whitespace */
- if (c == '(' && *input_line_pointer++ != ')' ||
- c == '[' && *input_line_pointer++ != ']')
+ if ((c == '(' && *input_line_pointer++ != ')')
+ || (c == '[' && *input_line_pointer++ != ']'))
{
as_bad ("Missing ')' assumed");
input_line_pointer--;
/* here with input_line_pointer->char after "(...)" */
return segment;
+ case 'E':
+ if (! flag_mri || *input_line_pointer != '\'')
+ goto de_fault;
+ as_bad ("EBCDIC constants are not supported");
+ /* Fall through. */
+ case 'A':
+ if (! flag_mri || *input_line_pointer != '\'')
+ goto de_fault;
+ ++input_line_pointer;
+ /* Fall through. */
case '\'':
- /* Warning: to conform to other people's assemblers NO ESCAPEMENT is
- permitted for a single quote. The next character, parity errors and
- all, is taken as the value of the operand. VERY KINKY. */
- expressionP->X_op = O_constant;
- expressionP->X_add_number = *input_line_pointer++;
+ if (! flag_mri)
+ {
+ /* Warning: to conform to other people's assemblers NO
+ ESCAPEMENT is permitted for a single quote. The next
+ character, parity errors and all, is taken as the value
+ of the operand. VERY KINKY. */
+ expressionP->X_op = O_constant;
+ expressionP->X_add_number = *input_line_pointer++;
+ break;
+ }
+
+ mri_char_constant (expressionP);
break;
case '+':
(void) operand (expressionP);
break;
+ case '"':
+ /* Double quote is the logical not operator in MRI mode. */
+ if (! flag_mri)
+ goto de_fault;
+ /* Fall through. */
case '~':
case '-':
{
}
break;
- case '.':
-#ifdef DOLLAR_DOT
case '$':
+ /* $ is the program counter when in MRI mode, or when DOLLAR_DOT
+ is defined. */
+#ifndef DOLLAR_DOT
+ if (! flag_mri)
+ goto de_fault;
#endif
+ if (flag_mri && hex_p (*input_line_pointer))
+ {
+ /* In MRI mode, $ is also used as the prefix for a
+ hexadecimal constant. */
+ integer_constant (16, expressionP);
+ break;
+ }
+ /* Fall through. */
+ case '.':
if (!is_part_of_name (*input_line_pointer))
{
const char *fake;
/* can't imagine any other kind of operand */
expressionP->X_op = O_absent;
input_line_pointer--;
- md_operand (expressionP);
+ break;
+
+ case '%':
+ if (! flag_mri)
+ goto de_fault;
+ integer_constant (2, expressionP);
+ break;
+
+ case '@':
+ if (! flag_mri)
+ goto de_fault;
+ integer_constant (8, expressionP);
+ break;
+
+ case ':':
+ if (! flag_mri)
+ goto de_fault;
+
+ /* In MRI mode, this is a floating point constant represented
+ using hexadecimal digits. */
+
+ ++input_line_pointer;
+ integer_constant (16, expressionP);
break;
default:
+ de_fault:
if (is_end_of_line[(unsigned char) c])
goto eol;
if (is_name_beginner (c)) /* here if did not begin with a digit */
}
else
{
- as_bad ("Bad expression");
- expressionP->X_op = O_constant;
- expressionP->X_add_number = 0;
+ /* Let the target try to parse it. Success is indicated by changing
+ the X_op field to something other than O_absent and pointing
+ input_line_pointer passed the expression. If it can't parse the
+ expression, X_op and input_line_pointer should be unchanged. */
+ expressionP->X_op = O_absent;
+ --input_line_pointer;
+ md_operand (expressionP);
+ if (expressionP->X_op == O_absent)
+ {
+ ++input_line_pointer;
+ as_bad ("Bad expression");
+ expressionP->X_op = O_constant;
+ expressionP->X_add_number = 0;
+ }
}
+ break;
}
/*
__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
- __, O_bit_or_not, __, __, __, O_modulus, O_bit_and, __,
+ __, O_bit_or_not, O_bit_not, __, __, O_modulus, O_bit_and, __,
__, __, O_multiply, O_add, __, O_subtract, __, O_divide,
__, __, __, __, __, __, __, __,
- __, __, __, __, O_left_shift, __, O_right_shift, __,
+ __, __, __, __, O_lt, __, O_gt, __,
__, __, __, __, __, __, __, __,
__, __, __, __, __, __, __, __,
__, __, __, __, __, __, __, __,
/*
* Rank Examples
* 0 operand, (expression)
- * 1 + -
- * 2 & ^ ! |
- * 3 * / % << >>
- * 4 unary - unary ~
+ * 1 = <> < <= >= >
+ * 2 + -
+ * 3 used for * / % in MRI mode
+ * 4 & ^ ! |
+ * 5 * / % << >>
+ * 6 unary - unary ~
*/
-static const operator_rankT op_rank[] =
+static operator_rankT op_rank[] =
{
0, /* O_illegal */
0, /* O_absent */
0, /* O_symbol */
0, /* O_register */
0, /* O_bit */
- 4, /* O_uminus */
- 4, /* O_bit_now */
- 3, /* O_multiply */
- 3, /* O_divide */
- 3, /* O_modulus */
- 3, /* O_left_shift */
- 3, /* O_right_shift */
- 2, /* O_bit_inclusive_or */
- 2, /* O_bit_or_not */
- 2, /* O_bit_exclusive_or */
- 2, /* O_bit_and */
- 1, /* O_add */
- 1, /* O_subtract */
+ 6, /* O_uminus */
+ 6, /* O_bit_not */
+ 5, /* O_multiply */
+ 5, /* O_divide */
+ 5, /* O_modulus */
+ 5, /* O_left_shift */
+ 5, /* O_right_shift */
+ 4, /* O_bit_inclusive_or */
+ 4, /* O_bit_or_not */
+ 4, /* O_bit_exclusive_or */
+ 4, /* O_bit_and */
+ 2, /* O_add */
+ 2, /* O_subtract */
+ 1, /* O_eq */
+ 1, /* O_ne */
+ 1, /* O_lt */
+ 1, /* O_le */
+ 1, /* O_ge */
+ 1 /* O_gt */
};
+
+/* Initialize the expression parser. */
+
+void
+expr_begin ()
+{
+ /* In MRI mode, multiplication and division have lower precedence
+ than the bit wise operators. */
+ if (flag_mri)
+ {
+ op_rank[O_multiply] = 3;
+ op_rank[O_divide] = 3;
+ op_rank[O_modulus] = 3;
+ }
+}
\f
+/* Return the encoding for the operator at INPUT_LINE_POINTER.
+ Advance INPUT_LINE_POINTER to the last character in the operator
+ (i.e., don't change it for a single character operator). */
+
+static inline operatorT
+operator ()
+{
+ int c;
+ operatorT ret;
+
+ c = *input_line_pointer;
+
+ switch (c)
+ {
+ default:
+ return op_encoding[c];
+
+ case '<':
+ switch (input_line_pointer[1])
+ {
+ default:
+ return op_encoding[c];
+ case '<':
+ ret = O_left_shift;
+ break;
+ case '>':
+ ret = O_ne;
+ break;
+ case '=':
+ ret = O_le;
+ break;
+ }
+ ++input_line_pointer;
+ return ret;
+
+ case '>':
+ switch (input_line_pointer[1])
+ {
+ default:
+ return op_encoding[c];
+ case '>':
+ ret = O_right_shift;
+ break;
+ case '=':
+ ret = O_ge;
+ break;
+ }
+ ++input_line_pointer;
+ return ret;
+
+ case '!':
+ /* We accept !! as equivalent to ^ for MRI compatibility. */
+ if (input_line_pointer[1] != '!')
+ {
+ if (flag_mri)
+ return O_bit_inclusive_or;
+ return op_encoding[c];
+ }
+ ++input_line_pointer;
+ return O_bit_exclusive_or;
+ }
+
+ /*NOTREACHED*/
+}
+
+/* Parse an expression. */
+
segT
expr (rank, resultP)
operator_rankT rank; /* Larger # is higher rank. */
segT retval;
expressionS right;
operatorT op_left;
- char c_left; /* 1st operator character. */
operatorT op_right;
- char c_right;
know (rank >= 0);
know (*input_line_pointer != ' '); /* Operand() gobbles spaces. */
- c_left = *input_line_pointer; /* Potential operator character. */
- op_left = op_encoding[(unsigned char) c_left];
+ op_left = operator ();
while (op_left != O_illegal && op_rank[(int) op_left] > rank)
{
segT rightseg;
input_line_pointer++; /*->after 1st character of operator. */
- /* Operators "<<" and ">>" have 2 characters. */
- if (*input_line_pointer == c_left && (c_left == '<' || c_left == '>'))
- ++input_line_pointer;
rightseg = expr (op_rank[(int) op_left], &right);
if (right.X_op == O_absent)
)
as_bad ("operation combines symbols in different segments");
- c_right = *input_line_pointer;
- op_right = op_encoding[(unsigned char) c_right];
- if (*input_line_pointer == c_right && (c_right == '<' || c_right == '>'))
- ++input_line_pointer;
+ op_right = operator ();
know (op_right == O_illegal || op_rank[(int) op_right] <= op_rank[(int) op_left]);
know ((int) op_left >= (int) O_multiply && (int) op_left <= (int) O_subtract);
if (resultP->X_op == O_big)
{
- as_warn ("left operand of %c is a %s; integer 0 assumed",
- c_left, resultP->X_add_number > 0 ? "bignum" : "float");
+ as_warn ("left operand is a %s; integer 0 assumed",
+ resultP->X_add_number > 0 ? "bignum" : "float");
resultP->X_op = O_constant;
resultP->X_add_number = 0;
resultP->X_add_symbol = NULL;
}
if (right.X_op == O_big)
{
- as_warn ("right operand of %c is a %s; integer 0 assumed",
- c_left, right.X_add_number > 0 ? "bignum" : "float");
+ as_warn ("right operand is a %s; integer 0 assumed",
+ right.X_add_number > 0 ? "bignum" : "float");
right.X_op = O_constant;
right.X_add_number = 0;
right.X_add_symbol = NULL;
}
/* Optimize common cases. */
-#if 0
- if (op_left == O_add && resultP->X_got_symbol)
- {
- /* XXX - kludge here to accomodate "_GLOBAL_OFFSET_TABLE + (x - y)"
- * expressions: this only works for this special case, the
- * _GLOBAL_OFFSET_TABLE thing *must* be the left operand, the whole
- * expression is given the segment of right expression (always a DIFFERENCE,
- * which should get resolved by fixup_segment())
- */
- resultP->X_op = right.X_op;
- resultP->X_add_symbol = right.X_add_symbol;
- resultP->X_op_symbol = right.X_op_symbol;
- }
- else
-#endif
- if (op_left == O_add && right.X_op == O_constant)
+ if (op_left == O_add && right.X_op == O_constant)
{
/* X + constant. */
resultP->X_add_number += right.X_add_number;
}
switch (op_left)
{
+ default: abort ();
case O_multiply: resultP->X_add_number *= v; break;
case O_divide: resultP->X_add_number /= v; break;
case O_modulus: resultP->X_add_number %= v; break;
case O_bit_and: resultP->X_add_number &= v; break;
case O_add: resultP->X_add_number += v; break;
case O_subtract: resultP->X_add_number -= v; break;
- default: abort ();
+ case O_eq:
+ resultP->X_add_number =
+ resultP->X_add_number == v ? ~ (offsetT) 0 : 0;
+ break;
+ case O_ne:
+ resultP->X_add_number =
+ resultP->X_add_number != v ? ~ (offsetT) 0 : 0;
+ break;
+ case O_lt:
+ resultP->X_add_number =
+ resultP->X_add_number < v ? ~ (offsetT) 0 : 0;
+ break;
+ case O_le:
+ resultP->X_add_number =
+ resultP->X_add_number <= v ? ~ (offsetT) 0 : 0;
+ break;
+ case O_ge:
+ resultP->X_add_number =
+ resultP->X_add_number >= v ? ~ (offsetT) 0 : 0;
+ break;
+ case O_gt:
+ resultP->X_add_number =
+ resultP->X_add_number > v ? ~ (offsetT) 0 : 0;
+ break;
}
}
else if (resultP->X_op == O_symbol
projects / binutils-gdb.git / commitdiff