/* expr.c -operands, expressions-
- Copyright (C) 1987, 1990, 1991 Free Software Foundation, Inc.
+ Copyright (C) 1987, 1990, 1991, 1992, 1993 Free Software Foundation, Inc.
-This file is part of GAS, the GNU Assembler.
+ This file is part of GAS, the GNU Assembler.
-GAS is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 1, or (at your option)
-any later version.
+ GAS is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2, or (at your option)
+ any later version.
-GAS is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
+ GAS is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
-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. */
-
-/* static const char rcsid[] = "$Id$"; */
+ 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. */
/*
* This is really a branch office of as-read.c. I split it out to clearly
#include "obstack.h"
-#ifdef __STDC__
-static void clean_up_expression(expressionS *expressionP);
-#else /* __STDC__ */
-static void clean_up_expression(); /* Internal. */
-#endif /* __STDC__ */
-extern const char EXP_CHARS[]; /* JF hide MD floating pt stuff all the same place */
-extern const char FLT_CHARS[];
-
-#ifdef LOCAL_LABELS_DOLLAR
-extern int local_label_defined[];
-#endif
+static void clean_up_expression PARAMS ((expressionS * expressionP));
+extern const char EXP_CHARS[], FLT_CHARS[];
/*
* Build any floating-point literal here.
* Also build any bignum literal here.
*/
-/* LITTLENUM_TYPE generic_buffer [6]; */ /* JF this is a hack */
/* Seems atof_machine can backscan through generic_bignum and hit whatever
happens to be loaded before it in memory. And its way too complicated
for me to fix right. Thus a hack. JF: Just make generic_bignum bigger,
and never write into the early words, thus they'll always be zero.
- I hate Dean's floating-point code. Bleh.
- */
-LITTLENUM_TYPE generic_bignum [SIZE_OF_LARGE_NUMBER+6];
-FLONUM_TYPE generic_floating_point_number =
+ I hate Dean's floating-point code. Bleh. */
+LITTLENUM_TYPE generic_bignum[SIZE_OF_LARGE_NUMBER + 6];
+FLONUM_TYPE generic_floating_point_number =
{
- & generic_bignum [6], /* low (JF: Was 0) */
- & generic_bignum [SIZE_OF_LARGE_NUMBER+6 - 1], /* high JF: (added +6) */
+ &generic_bignum[6], /* low (JF: Was 0) */
+ &generic_bignum[SIZE_OF_LARGE_NUMBER + 6 - 1], /* high JF: (added +6) */
0, /* leader */
0, /* exponent */
0 /* sign */
/* If nonzero, we've been asked to assemble nan, +inf or -inf */
int generic_floating_point_magic;
\f
+void
+floating_constant (expressionP)
+ expressionS *expressionP;
+{
+ /* input_line_pointer->*/
+ /* floating-point constant. */
+ int error_code;
+
+ error_code = atof_generic
+ (&input_line_pointer, ".", EXP_CHARS,
+ &generic_floating_point_number);
+
+ if (error_code)
+ {
+ if (error_code == ERROR_EXPONENT_OVERFLOW)
+ {
+ as_bad ("bad floating-point constant: exponent overflow, probably assembling junk");
+ }
+ else
+ {
+ as_bad ("bad floating-point constant: unknown error code=%d.", error_code);
+ }
+ }
+ expressionP->X_seg = big_section;
+ /* input_line_pointer->just after constant, */
+ /* which may point to whitespace. */
+ expressionP->X_add_number = -1;
+}
+
+
+void
+integer_constant (radix, expressionP)
+ int radix;
+ expressionS *expressionP;
+{
+ char *digit_2; /*->2nd digit of number. */
+ 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. */
+ int too_many_digits = 0; /* if we see >= this number of */
+ char *name; /* points to name of symbol */
+ symbolS *symbolP; /* points to symbol */
+
+ int small; /* true if fits in 32 bits. */
+ extern const char hex_value[]; /* in hex_value.c */
+
+ /* May be bignum, or may fit in 32 bits. */
+ /* Most numbers fit into 32 bits, and we want this case to be fast.
+ so we pretend it will fit into 32 bits. If, after making up a 32
+ bit number, we realise that we have scanned more digits than
+ comfortably fit into 32 bits, we re-scan the digits coding them
+ into a bignum. For decimal and octal numbers we are
+ conservative: Some numbers may be assumed bignums when in fact
+ they do fit into 32 bits. Numbers of any radix can have excess
+ leading zeros: We strive to recognise this and cast them back
+ into 32 bits. We must check that the bignum really is more than
+ 32 bits, and change it back to a 32-bit number if it fits. The
+ number we are looking for is expected to be positive, but if it
+ fits into 32 bits as an unsigned number, we let it be a 32-bit
+ number. The cavalier approach is for speed in ordinary cases. */
+
+ switch (radix)
+ {
+
+ case 2:
+ maxdig = 2;
+ too_many_digits = 33;
+ break;
+ case 8:
+ maxdig = radix = 8;
+ too_many_digits = 11;
+ break;
+ case 16:
+
+
+ maxdig = radix = 16;
+ too_many_digits = 9;
+ break;
+ case 10:
+ maxdig = radix = 10;
+ too_many_digits = 11;
+ }
+ c = *input_line_pointer;
+ input_line_pointer++;
+ digit_2 = input_line_pointer;
+ for (number = 0; (digit = hex_value[c]) < maxdig; c = *input_line_pointer++)
+ {
+ number = number * radix + digit;
+ }
+ /* c contains character after number. */
+ /* input_line_pointer->char after c. */
+ small = input_line_pointer - digit_2 < too_many_digits;
+ if (!small)
+ {
+ /*
+ * we saw a lot of digits. manufacture a bignum the hard way.
+ */
+ LITTLENUM_TYPE *leader; /*->high order littlenum of the bignum. */
+ LITTLENUM_TYPE *pointer; /*->littlenum we are frobbing now. */
+ long carry;
+
+ leader = generic_bignum;
+ generic_bignum[0] = 0;
+ generic_bignum[1] = 0;
+ /* we could just use digit_2, but lets be mnemonic. */
+ input_line_pointer = --digit_2; /*->1st digit. */
+ c = *input_line_pointer++;
+ for (; (carry = hex_value[c]) < maxdig; c = *input_line_pointer++)
+ {
+ for (pointer = generic_bignum;
+ pointer <= leader;
+ pointer++)
+ {
+ long work;
+
+ work = carry + radix * *pointer;
+ *pointer = work & LITTLENUM_MASK;
+ carry = work >> LITTLENUM_NUMBER_OF_BITS;
+ }
+ if (carry)
+ {
+ if (leader < generic_bignum + SIZE_OF_LARGE_NUMBER - 1)
+ { /* room to grow a longer bignum. */
+ *++leader = carry;
+ }
+ }
+ }
+ /* again, c is char after number, */
+ /* input_line_pointer->after c. */
+ know (sizeof (int) * 8 == 32);
+ know (LITTLENUM_NUMBER_OF_BITS == 16);
+ /* hence the constant "2" in the next line. */
+ if (leader < generic_bignum + 2)
+ { /* will fit into 32 bits. */
+ number =
+ ((generic_bignum[1] & LITTLENUM_MASK) << LITTLENUM_NUMBER_OF_BITS)
+ | (generic_bignum[0] & LITTLENUM_MASK);
+ small = 1;
+ }
+ else
+ {
+ number = leader - generic_bignum + 1; /* number of littlenums in the bignum. */
+ }
+ }
+ if (small)
+ {
+ /*
+ * here with number, in correct radix. c is the next char.
+ * note that unlike un*x, we allow "011f" "0x9f" to
+ * both mean the same as the (conventional) "9f". this is simply easier
+ * than checking for strict canonical form. syntax sux!
+ */
+
+ switch (c)
+ {
+
+#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_add_symbol = symbolP;
+ expressionP->X_seg = S_GET_SEGMENT (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_seg = absolute_section;
+ }
+
+ expressionP->X_add_number = 0;
+ break;
+ } /* case 'b' */
+
+ 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. */
+#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);
+#endif
+ expressionP->X_add_symbol = symbolP;
+ expressionP->X_seg = undefined_section;
+ expressionP->X_subtract_symbol = NULL;
+ expressionP->X_add_number = 0;
+
+ break;
+ } /* case 'f' */
+
+#endif /* LOCAL_LABELS_FB */
+
+#ifdef LOCAL_LABELS_DOLLAR
+
+ case '$':
+ {
+
+ /* If the dollar label is *currently* defined, then this is just
+ another reference to it. If it is not *currently* defined,
+ then this is a fresh instantiation of that number, so create
+ it. */
+
+ if (dollar_label_defined (number))
+ {
+ name = dollar_label_name (number, 0);
+ symbolP = symbol_find (name);
+ know (symbolP != NULL);
+ }
+ else
+ {
+ name = dollar_label_name (number, 1);
+ symbolP = symbol_find_or_make (name);
+ }
+
+ expressionP->X_add_symbol = symbolP;
+ expressionP->X_add_number = 0;
+ expressionP->X_seg = S_GET_SEGMENT (symbolP);
+
+ break;
+ } /* case '$' */
+
+#endif /* LOCAL_LABELS_DOLLAR */
+
+ default:
+ {
+ expressionP->X_add_number = number;
+ expressionP->X_seg = absolute_section;
+ input_line_pointer--; /* restore following character. */
+ break;
+ } /* really just a number */
+
+ } /* switch on char following the number */
+
+
+ }
+ else
+ {
+ /* not a small number */
+ expressionP->X_add_number = number;
+ expressionP->X_seg = big_section;
+ input_line_pointer--; /*->char following number. */
+ }
+} /* integer_constant() */
+
+
/*
* Summary of operand().
*
*
*/
\f
+
+
static segT
operand (expressionP)
- register expressionS * expressionP;
+ expressionS *expressionP;
{
- register char c;
- register char *name; /* points to name of symbol */
- register symbolS * symbolP; /* Points to symbol */
+ char c;
+ symbolS *symbolP; /* points to symbol */
+ char *name; /* points to name of symbol */
- extern char hex_value[]; /* In hex_value.c */
+ /* digits, assume it is a bignum. */
- SKIP_WHITESPACE(); /* Leading whitespace is part of operand. */
- c = * input_line_pointer ++; /* Input_line_pointer->past char in c. */
- if (isdigit(c))
+ SKIP_WHITESPACE (); /* leading whitespace is part of operand. */
+ c = *input_line_pointer++; /* input_line_pointer->past char in c. */
+
+ switch (c)
{
- register valueT number; /* offset or (absolute) value */
- register short int digit; /* value of next digit in current radix */
- /* invented for humans only, hope */
- /* optimising compiler flushes it! */
- register short int radix; /* 2, 8, 10 or 16 */
- /* 0 means we saw start of a floating- */
- /* point constant. */
- register short int maxdig = 0;/* Highest permitted digit value. */
- register int too_many_digits = 0; /* If we see >= this number of */
- /* digits, assume it is a bignum. */
- register char * digit_2; /*->2nd digit of number. */
- int small; /* TRUE if fits in 32 bits. */
-
- if (c == '0') { /* non-decimal radix */
- if ((c = *input_line_pointer ++)=='x' || c=='X') {
- c = *input_line_pointer ++; /* read past "0x" or "0X" */
- maxdig = radix = 16;
- too_many_digits = 9;
- } else {
- /* If it says '0f' and the line ends or it DOESN'T look like
- a floating point #, its a local label ref. DTRT */
- /* likewise for the b's. xoxorich. */
- if ((c == 'f' || c == 'b' || c == 'B')
- && (!*input_line_pointer ||
- (!strchr("+-.0123456789",*input_line_pointer) &&
- !strchr(EXP_CHARS,*input_line_pointer)))) {
- maxdig = radix = 10;
- too_many_digits = 11;
- c = '0';
- input_line_pointer -= 2;
-
- } else if (c == 'b' || c == 'B') {
- c = *input_line_pointer++;
- maxdig = radix = 2;
- too_many_digits = 33;
-
- } else if (c && strchr(FLT_CHARS,c)) {
- radix = 0; /* Start of floating-point constant. */
- /* input_line_pointer->1st char of number. */
- expressionP->X_add_number = -(isupper(c) ? tolower(c) : c);
-
- } else { /* By elimination, assume octal radix. */
- radix = maxdig = 8;
- too_many_digits = 11;
- }
- } /* c == char after "0" or "0x" or "0X" or "0e" etc. */
- } else {
- maxdig = radix = 10;
- too_many_digits = 11;
- } /* if operand starts with a zero */
-
- if (radix) { /* Fixed-point integer constant. */
- /* May be bignum, or may fit in 32 bits. */
-/*
- * Most numbers fit into 32 bits, and we want this case to be fast.
- * So we pretend it will fit into 32 bits. If, after making up a 32
- * bit number, we realise that we have scanned more digits than
- * comfortably fit into 32 bits, we re-scan the digits coding
- * them into a bignum. For decimal and octal numbers we are conservative: some
- * numbers may be assumed bignums when in fact they do fit into 32 bits.
- * Numbers of any radix can have excess leading zeros: we strive
- * to recognise this and cast them back into 32 bits.
- * We must check that the bignum really is more than 32
- * bits, and change it back to a 32-bit number if it fits.
- * The number we are looking for is expected to be positive, but
- * if it fits into 32 bits as an unsigned number, we let it be a 32-bit
- * number. The cavalier approach is for speed in ordinary cases.
- */
- digit_2 = input_line_pointer;
- for (number=0; (digit=hex_value[c])<maxdig; c = * input_line_pointer ++)
+#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 '4':
+ case '5':
+ case '6':
+ case '7':
+ case '8':
+ case '9':
+ input_line_pointer--;
+
+ integer_constant (10, expressionP);
+ break;
+
+ case '0':
+ /* non-decimal radix */
+
+
+ c = *input_line_pointer;
+ switch (c)
+ {
+
+ default:
+ if (c && strchr (FLT_CHARS, c))
{
- number = number * radix + digit;
+ input_line_pointer++;
+ floating_constant (expressionP);
}
- /* C contains character after number. */
- /* Input_line_pointer->char after C. */
- small = input_line_pointer - digit_2 < too_many_digits;
- if (! small)
+ else
{
- /*
- * We saw a lot of digits. Manufacture a bignum the hard way.
- */
- LITTLENUM_TYPE * leader; /*->high order littlenum of the bignum. */
- LITTLENUM_TYPE * pointer; /*->littlenum we are frobbing now. */
- long carry;
-
- leader = generic_bignum;
- generic_bignum [0] = 0;
- generic_bignum [1] = 0;
- /* We could just use digit_2, but lets be mnemonic. */
- input_line_pointer = -- digit_2; /*->1st digit. */
- c = *input_line_pointer ++;
- for (; (carry = hex_value [c]) < maxdig; c = * input_line_pointer ++)
- {
- for (pointer = generic_bignum;
- pointer <= leader;
- pointer ++)
- {
- long work;
-
- work = carry + radix * * pointer;
- * pointer = work & LITTLENUM_MASK;
- carry = work >> LITTLENUM_NUMBER_OF_BITS;
- }
- if (carry)
- {
- if (leader < generic_bignum + SIZE_OF_LARGE_NUMBER - 1)
- { /* Room to grow a longer bignum. */
- * ++ leader = carry;
- }
- }
- }
- /* Again, C is char after number, */
- /* input_line_pointer->after C. */
- know(sizeof (int) * 8 == 32);
- know(LITTLENUM_NUMBER_OF_BITS == 16);
- /* Hence the constant "2" in the next line. */
- if (leader < generic_bignum + 2)
- { /* Will fit into 32 bits. */
- number =
- ((generic_bignum [1] & LITTLENUM_MASK) << LITTLENUM_NUMBER_OF_BITS)
- | (generic_bignum [0] & LITTLENUM_MASK);
- small = 1;
- }
- else
- {
- number = leader - generic_bignum + 1; /* Number of littlenums in the bignum. */
- }
+ /* The string was only zero */
+ expressionP->X_add_symbol = 0;
+ expressionP->X_add_number = 0;
+ expressionP->X_seg = absolute_section;
}
- if (small)
- {
- /*
- * Here with number, in correct radix. c is the next char.
- * Note that unlike Un*x, we allow "011f" "0x9f" to
- * both mean the same as the (conventional) "9f". This is simply easier
- * than checking for strict canonical form. Syntax sux!
- */
- if (number<10)
- {
- if (0
+
+ break;
+
+ case 'x':
+ case 'X':
+ input_line_pointer++;
+ integer_constant (16, expressionP);
+ break;
+
+ case 'b':
#ifdef LOCAL_LABELS_FB
- || c=='b'
-#endif
-#ifdef LOCAL_LABELS_DOLLAR
- || (c=='$' && local_label_defined[number])
+ if (!*input_line_pointer
+ || (!strchr ("+-.0123456789", *input_line_pointer)
+ && !strchr (EXP_CHARS, *input_line_pointer)))
+ {
+ input_line_pointer--;
+ integer_constant (10, expressionP);
+ break;
+ }
#endif
- )
- {
- /*
- * Backward ref to local label.
- * Because it is backward, expect it to be DEFINED.
- */
- /*
- * Construct a local label.
- */
- name = local_label_name ((int)number, 0);
- if (((symbolP = symbol_find(name)) != NULL) /* seen before */
- && (S_IS_DEFINED(symbolP))) /* symbol is defined: OK */
- { /* Expected path: symbol defined. */
- /* Local labels are never absolute. Don't waste time checking absoluteness. */
- know((S_GET_SEGMENT(symbolP) == SEG_DATA) || (S_GET_SEGMENT(symbolP) == SEG_TEXT));
- expressionP->X_add_symbol = symbolP;
- expressionP->X_add_number = 0;
- expressionP->X_seg = S_GET_SEGMENT(symbolP);
- }
- else
- { /* Either not seen or not defined. */
- as_bad("Backw. ref to unknown label \"%d:\", 0 assumed.",
- number);
- expressionP->X_add_number = 0;
- expressionP->X_seg = SEG_ABSOLUTE;
- }
- }
- else
- {
- if (0
+ case 'B':
+ input_line_pointer++;
+ integer_constant (2, expressionP);
+ break;
+
+ case '0':
+ case '1':
+ case '2':
+ case '3':
+ case '4':
+ case '5':
+ case '6':
+ case '7':
+ integer_constant (8, expressionP);
+ break;
+
+ case 'f':
#ifdef LOCAL_LABELS_FB
- || c == 'f'
+ /* if it says '0f' and the line ends or it doesn't look like
+ a floating point #, its a local label ref. dtrt */
+ /* likewise for the b's. xoxorich. */
+ if (c == 'f'
+ && (!*input_line_pointer ||
+ (!strchr ("+-.0123456789", *input_line_pointer) &&
+ !strchr (EXP_CHARS, *input_line_pointer))))
+ {
+ input_line_pointer -= 1;
+ integer_constant (10, expressionP);
+ break;
+ }
#endif
+
+ case 'd':
+ case 'D':
+ case 'F':
+ case 'r':
+ case 'e':
+ case 'E':
+ case 'g':
+ case 'G':
+
+ input_line_pointer++;
+ floating_constant (expressionP);
+ expressionP->X_add_number = -(isupper (c) ? tolower (c) : c);
+ break;
+
#ifdef LOCAL_LABELS_DOLLAR
- || (c=='$' && !local_label_defined[number])
+ case '$':
+ integer_constant (10, expressionP);
+ break;
#endif
- )
- {
- /*
- * Forward reference. Expect symbol to be undefined or
- * unknown. Undefined: seen it before. Unknown: never seen
- * it in this pass.
- * 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 = local_label_name((int)number, 1);
- symbolP = symbol_find_or_make(name);
- /* We have no need to check symbol properties. */
- know(S_GET_SEGMENT(symbolP) == SEG_UNKNOWN
- || S_GET_SEGMENT(symbolP) == SEG_TEXT
- || S_GET_SEGMENT(symbolP) == SEG_DATA);
- expressionP->X_add_symbol = symbolP;
- expressionP->X_seg = SEG_UNKNOWN;
- expressionP->X_subtract_symbol = NULL;
- expressionP->X_add_number = 0;
- }
- else
- { /* Really a number, not a local label. */
- expressionP->X_add_number = number;
- expressionP->X_seg = SEG_ABSOLUTE;
- input_line_pointer --; /* Restore following character. */
- } /* if (c=='f') */
- } /* if (c=='b') */
- }
- else
- { /* Really a number. */
- expressionP->X_add_number = number;
- expressionP->X_seg = SEG_ABSOLUTE;
- input_line_pointer --; /* Restore following character. */
- } /* if (number<10) */
- }
- else
- {
- expressionP->X_add_number = number;
- expressionP->X_seg = SEG_BIG;
- input_line_pointer --; /*->char following number. */
- } /* if (small) */
- } /* (If integer constant) */
- else
- { /* input_line_pointer->*/
- /* floating-point constant. */
- int error_code;
+ }
- error_code = atof_generic
- (& input_line_pointer, ".", EXP_CHARS,
- & generic_floating_point_number);
+ break;
+ case '(':
+ /* didn't begin with digit & not a name */
+ {
+ (void) expression (expressionP);
+ /* Expression() will pass trailing whitespace */
+ if (*input_line_pointer++ != ')')
+ {
+ as_bad ("Missing ')' assumed");
+ input_line_pointer--;
+ }
+ /* here with input_line_pointer->char after "(...)" */
+ }
+ return expressionP->X_seg;
- if (error_code)
- {
- if (error_code == ERROR_EXPONENT_OVERFLOW)
- {
- as_bad("Bad floating-point constant: exponent overflow, probably assembling junk");
- }
- else
- {
- as_bad("Bad floating-point constant: unknown error code=%d.", error_code);
- }
- }
- expressionP->X_seg = SEG_BIG;
- /* input_line_pointer->just after constant, */
- /* which may point to whitespace. */
- know(expressionP->X_add_number < 0); /* < 0 means "floating point". */
- } /* if (not floating-point constant) */
- }
- else if(c=='.' && !is_part_of_name(*input_line_pointer)) {
- extern struct obstack frags;
- /*
- JF: '.' is pseudo symbol with value of current location in current
- segment. . .
- */
- symbolP = symbol_new("L0\001",
- now_seg,
- (valueT)(obstack_next_free(&frags)-frag_now->fr_literal),
- frag_now);
+ 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_add_number = *input_line_pointer++;
+ expressionP->X_seg = absolute_section;
+ break;
- expressionP->X_add_number=0;
- expressionP->X_add_symbol=symbolP;
- expressionP->X_seg = now_seg;
+ case '+':
+ operand (expressionP);
+ break;
- } else if (is_name_beginner(c)) /* here if did not begin with a digit */
- {
- /*
- * Identifier begins here.
- * This is kludged for speed, so code is repeated.
- */
- name = -- input_line_pointer;
- c = get_symbol_end();
- symbolP = symbol_find_or_make(name);
- /*
- * If we have an absolute symbol or a reg, then we know its value now.
- */
- expressionP->X_seg = S_GET_SEGMENT(symbolP);
- switch (expressionP->X_seg)
+ case '~':
+ case '-':
+ {
+ /* unary operator: hope for SEG_ABSOLUTE */
+ segT opseg = operand (expressionP);
+ if (opseg == absolute_section)
+ {
+ /* input_line_pointer -> char after operand */
+ if (c == '-')
+ {
+ expressionP->X_add_number = -expressionP->X_add_number;
+ /* Notice: '-' may overflow: no warning is given. This is
+ compatible with other people's assemblers. Sigh. */
+ }
+ else
+ {
+ expressionP->X_add_number = ~expressionP->X_add_number;
+ }
+ }
+ else if (opseg == text_section
+ || opseg == data_section
+ || opseg == bss_section
+ || opseg == pass1_section
+ || opseg == undefined_section)
+ {
+ if (c == '-')
+ {
+ expressionP->X_subtract_symbol = expressionP->X_add_symbol;
+ expressionP->X_add_symbol = 0;
+ expressionP->X_seg = diff_section;
+ }
+ else
+ as_warn ("Unary operator %c ignored because bad operand follows",
+ c);
+ }
+ else
+ as_warn ("Unary operator %c ignored because bad operand follows", c);
+ }
+ break;
+
+ case '.':
+ if (!is_part_of_name (*input_line_pointer))
{
- case SEG_ABSOLUTE:
- case SEG_REGISTER:
- expressionP->X_add_number = S_GET_VALUE(symbolP);
+ char *fake;
+ extern struct obstack frags;
+
+ /* JF: '.' is pseudo symbol with value of current location
+ in current segment. */
+#ifdef DOT_LABEL_PREFIX
+ fake = ".L0\001";
+#else
+ fake = "L0\001";
+#endif
+ symbolP = symbol_new (fake,
+ now_seg,
+ (valueT) ((char*)obstack_next_free (&frags) - frag_now->fr_literal),
+ frag_now);
+
+ expressionP->X_add_number = 0;
+ expressionP->X_add_symbol = symbolP;
+ expressionP->X_seg = now_seg;
break;
- default:
- expressionP->X_add_number = 0;
- expressionP->X_add_symbol = symbolP;
}
- * input_line_pointer = c;
- expressionP->X_subtract_symbol = NULL;
- }
- else if (c=='(')/* didn't begin with digit & not a name */
- {
- (void)expression(expressionP);
- /* Expression() will pass trailing whitespace */
- if (* input_line_pointer ++ != ')')
+ else
{
- as_bad("Missing ')' assumed");
- input_line_pointer --;
- }
- /* here with input_line_pointer->char after "(...)" */
- }
- else if (c == '~' || c == '-' || c == '+') {
- /* unary operator: hope for SEG_ABSOLUTE */
- switch (operand (expressionP)) {
- case SEG_ABSOLUTE:
- /* input_line_pointer->char after operand */
- if (c=='-') {
- expressionP->X_add_number = - expressionP->X_add_number;
- /*
- * Notice: '-' may overflow: no warning is given. This is compatible
- * with other people's assemblers. Sigh.
- */
- } else if (c == '~') {
- expressionP->X_add_number = ~ expressionP->X_add_number;
- } else if (c != '+') {
- know(0);
- } /* switch on unary operator */
- break;
+ goto isname;
+
- case SEG_TEXT:
- case SEG_DATA:
- case SEG_BSS:
- case SEG_PASS1:
- case SEG_UNKNOWN:
- if(c=='-') { /* JF I hope this hack works */
- expressionP->X_subtract_symbol=expressionP->X_add_symbol;
- expressionP->X_add_symbol=0;
- expressionP->X_seg=SEG_DIFFERENCE;
- break;
}
- default: /* unary on non-absolute is unsuported */
- as_bad("Unary operator %c ignored because bad operand follows", c);
- break;
- /* Expression undisturbed from operand(). */
- }
- }
- else if (c=='\'')
- {
-/*
- * 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_add_number = * input_line_pointer ++;
- expressionP->X_seg = SEG_ABSOLUTE;
- }
- else
- {
- /* can't imagine any other kind of operand */
- expressionP->X_seg = SEG_ABSENT;
- input_line_pointer --;
+ case ',':
+ case '\n':
+ case '\0':
+ eol:
+ /* can't imagine any other kind of operand */
+ expressionP->X_seg = absent_section;
+ input_line_pointer--;
md_operand (expressionP);
+ break;
+
+ default:
+ if (is_end_of_line[c])
+ goto eol;
+ if (is_name_beginner (c)) /* here if did not begin with a digit */
+ {
+ /*
+ * Identifier begins here.
+ * This is kludged for speed, so code is repeated.
+ */
+ isname:
+ name = --input_line_pointer;
+ c = get_symbol_end ();
+ symbolP = symbol_find_or_make (name);
+ /* If we have an absolute symbol or a reg, then we know its value
+ now. */
+ expressionP->X_seg = S_GET_SEGMENT (symbolP);
+ if (expressionP->X_seg == absolute_section
+ || expressionP->X_seg == reg_section)
+ expressionP->X_add_number = S_GET_VALUE (symbolP);
+ else
+ {
+ expressionP->X_add_number = 0;
+ expressionP->X_add_symbol = symbolP;
+ }
+ *input_line_pointer = c;
+ expressionP->X_subtract_symbol = NULL;
+ }
+ else
+ {
+ as_bad ("Bad expression");
+ expressionP->X_add_number = 0;
+ expressionP->X_seg = absolute_section;
+ }
}
-/*
- * It is more 'efficient' to clean up the expressions when they are created.
- * Doing it here saves lines of code.
- */
+
+ /*
+ * It is more 'efficient' to clean up the expressionS when they are created.
+ * Doing it here saves lines of code.
+ */
clean_up_expression (expressionP);
- SKIP_WHITESPACE(); /*->1st char after operand. */
- know(* input_line_pointer != ' ');
+ SKIP_WHITESPACE (); /*->1st char after operand. */
+ know (*input_line_pointer != ' ');
return (expressionP->X_seg);
-} /* operand() */
+} /* operand() */
\f
+
/* Internal. Simplify a struct expression for use by expr() */
/*
static void
clean_up_expression (expressionP)
- register expressionS * expressionP;
+ expressionS *expressionP;
{
- switch (expressionP->X_seg)
+ segT s = expressionP->X_seg;
+ if (s == absent_section
+ || s == pass1_section)
+ {
+ expressionP->X_add_symbol = NULL;
+ expressionP->X_subtract_symbol = NULL;
+ expressionP->X_add_number = 0;
+ }
+ else if (s == big_section
+ || s == absolute_section)
+ {
+ expressionP->X_subtract_symbol = NULL;
+ expressionP->X_add_symbol = NULL;
+ }
+ else if (s == undefined_section)
+ expressionP->X_subtract_symbol = NULL;
+ else if (s == diff_section)
{
- case SEG_ABSENT:
- case SEG_PASS1:
- expressionP->X_add_symbol = NULL;
- expressionP->X_subtract_symbol = NULL;
- expressionP->X_add_number = 0;
- break;
-
- case SEG_BIG:
- case SEG_ABSOLUTE:
- expressionP->X_subtract_symbol = NULL;
- expressionP->X_add_symbol = NULL;
- break;
-
- case SEG_TEXT:
- case SEG_DATA:
- case SEG_BSS:
- case SEG_UNKNOWN:
- expressionP->X_subtract_symbol = NULL;
- break;
-
- case SEG_DIFFERENCE:
/*
* It does not hurt to 'cancel' NULL==NULL
* when comparing symbols for 'eq'ness.
* It is faster to re-cancel them to NULL
* than to check for this special case.
- */
+ */
if (expressionP->X_subtract_symbol == expressionP->X_add_symbol
- || (expressionP->X_subtract_symbol
+ || (expressionP->X_subtract_symbol
&& expressionP->X_add_symbol
- && expressionP->X_subtract_symbol->sy_frag==expressionP->X_add_symbol->sy_frag
- && S_GET_VALUE(expressionP->X_subtract_symbol) == S_GET_VALUE(expressionP->X_add_symbol))) {
- expressionP->X_subtract_symbol = NULL;
- expressionP->X_add_symbol = NULL;
- expressionP->X_seg = SEG_ABSOLUTE;
- }
- break;
-
- case SEG_REGISTER:
- expressionP->X_add_symbol = NULL;
- expressionP->X_subtract_symbol = NULL;
- break;
-
- default:
- BAD_CASE (expressionP->X_seg);
- break;
+ && (expressionP->X_subtract_symbol->sy_frag
+ == expressionP->X_add_symbol->sy_frag)
+ && SEG_NORMAL (S_GET_SEGMENT (expressionP->X_add_symbol))
+ && (S_GET_VALUE (expressionP->X_subtract_symbol)
+ == S_GET_VALUE (expressionP->X_add_symbol))))
+ {
+ expressionP->X_subtract_symbol = NULL;
+ expressionP->X_add_symbol = NULL;
+ expressionP->X_seg = absolute_section;
+ }
+ }
+ else if (s == reg_section)
+ {
+ expressionP->X_add_symbol = NULL;
+ expressionP->X_subtract_symbol = NULL;
}
-} /* clean_up_expression() */
+ else
+ {
+ if (SEG_NORMAL (expressionP->X_seg))
+ {
+ expressionP->X_subtract_symbol = NULL;
+ }
+ else
+ {
+ BAD_CASE (expressionP->X_seg);
+ }
+ }
+}
\f
/*
* expr_part ()
static segT
expr_part (symbol_1_PP, symbol_2_P)
- symbolS ** symbol_1_PP;
- symbolS * symbol_2_P;
+ symbolS **symbol_1_PP;
+ symbolS *symbol_2_P;
{
- segT return_value;
-
- know((* symbol_1_PP) == NULL
- || (S_GET_SEGMENT(*symbol_1_PP) == SEG_TEXT)
- || (S_GET_SEGMENT(*symbol_1_PP) == SEG_DATA)
- || (S_GET_SEGMENT(*symbol_1_PP) == SEG_BSS)
- || (!S_IS_DEFINED(* symbol_1_PP)));
- know(symbol_2_P == NULL
- || (S_GET_SEGMENT(symbol_2_P) == SEG_TEXT)
- || (S_GET_SEGMENT(symbol_2_P) == SEG_DATA)
- || (S_GET_SEGMENT(symbol_2_P) == SEG_BSS)
- || (!S_IS_DEFINED(symbol_2_P)));
- if (* symbol_1_PP)
+ segT return_value;
+
+#if !defined (BFD_ASSEMBLER) && (defined (OBJ_AOUT) || defined (OBJ_BOUT))
+ int test = ((*symbol_1_PP) == NULL
+ || (S_GET_SEGMENT (*symbol_1_PP) == text_section)
+ || (S_GET_SEGMENT (*symbol_1_PP) == data_section)
+ || (S_GET_SEGMENT (*symbol_1_PP) == bss_section)
+ || (!S_IS_DEFINED (*symbol_1_PP)));
+ assert (test);
+ test = (symbol_2_P == NULL
+ || (S_GET_SEGMENT (symbol_2_P) == text_section)
+ || (S_GET_SEGMENT (symbol_2_P) == data_section)
+ || (S_GET_SEGMENT (symbol_2_P) == bss_section)
+ || (!S_IS_DEFINED (symbol_2_P)));
+ assert (test);
+#endif
+ if (*symbol_1_PP)
{
- if (!S_IS_DEFINED(* symbol_1_PP))
+ if (!S_IS_DEFINED (*symbol_1_PP))
{
if (symbol_2_P)
{
- return_value = SEG_PASS1;
- * symbol_1_PP = NULL;
+ return_value = pass1_section;
+ *symbol_1_PP = NULL;
}
else
{
- know(!S_IS_DEFINED(* symbol_1_PP));
- return_value = SEG_UNKNOWN;
+ know (!S_IS_DEFINED (*symbol_1_PP));
+ return_value = undefined_section;
}
}
else
{
if (symbol_2_P)
{
- if (!S_IS_DEFINED(symbol_2_P))
+ if (!S_IS_DEFINED (symbol_2_P))
{
- * symbol_1_PP = NULL;
- return_value = SEG_PASS1;
+ *symbol_1_PP = NULL;
+ return_value = pass1_section;
}
else
{
/* {seg1} - {seg2} */
- as_bad("Expression too complex, 2 symbols forgotten: \"%s\" \"%s\"",
- S_GET_NAME(* symbol_1_PP), S_GET_NAME(symbol_2_P));
- * symbol_1_PP = NULL;
- return_value = SEG_ABSOLUTE;
+ as_bad ("Expression too complex, 2 symbolS forgotten: \"%s\" \"%s\"",
+ S_GET_NAME (*symbol_1_PP), S_GET_NAME (symbol_2_P));
+ *symbol_1_PP = NULL;
+ return_value = absolute_section;
}
}
else
{
- return_value = S_GET_SEGMENT(* symbol_1_PP);
+ return_value = S_GET_SEGMENT (*symbol_1_PP);
}
}
}
{ /* (* symbol_1_PP) == NULL */
if (symbol_2_P)
{
- * symbol_1_PP = symbol_2_P;
- return_value = S_GET_SEGMENT(symbol_2_P);
+ *symbol_1_PP = symbol_2_P;
+ return_value = S_GET_SEGMENT (symbol_2_P);
}
else
{
- * symbol_1_PP = NULL;
- return_value = SEG_ABSOLUTE;
+ *symbol_1_PP = NULL;
+ return_value = absolute_section;
}
}
- know(return_value == SEG_ABSOLUTE
- || return_value == SEG_TEXT
- || return_value == SEG_DATA
- || return_value == SEG_BSS
- || return_value == SEG_UNKNOWN
- || return_value == SEG_PASS1);
- know((* symbol_1_PP) == NULL
- || (S_GET_SEGMENT(* symbol_1_PP) == return_value));
+#if defined (OBJ_AOUT) && !defined (BFD_ASSEMBLER)
+ test = (return_value == absolute_section
+ || return_value == text_section
+ || return_value == data_section
+ || return_value == bss_section
+ || return_value == undefined_section
+ || return_value == pass1_section);
+ assert (test);
+#endif
+ know ((*symbol_1_PP) == NULL
+ || (S_GET_SEGMENT (*symbol_1_PP) == return_value));
return (return_value);
-} /* expr_part() */
+}
\f
/* Expression parser. */
typedef enum
{
-O_illegal, /* (0) what we get for illegal op */
-
-O_multiply, /* (1) * */
-O_divide, /* (2) / */
-O_modulus, /* (3) % */
-O_left_shift, /* (4) < */
-O_right_shift, /* (5) > */
-O_bit_inclusive_or, /* (6) | */
-O_bit_or_not, /* (7) ! */
-O_bit_exclusive_or, /* (8) ^ */
-O_bit_and, /* (9) & */
-O_add, /* (10) + */
-O_subtract /* (11) - */
+ O_illegal, /* (0) what we get for illegal op */
+
+ O_multiply, /* (1) * */
+ O_divide, /* (2) / */
+ O_modulus, /* (3) % */
+ O_left_shift, /* (4) < */
+ O_right_shift, /* (5) > */
+ O_bit_inclusive_or, /* (6) | */
+ O_bit_or_not, /* (7) ! */
+ O_bit_exclusive_or, /* (8) ^ */
+ O_bit_and, /* (9) & */
+ O_add, /* (10) + */
+ O_subtract /* (11) - */
}
+
operatorT;
+#undef __
#define __ O_illegal
-static const operatorT op_encoding [256] = { /* maps ASCII->operators */
-
-__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
-__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
-
-__, O_bit_or_not, __, __, __, O_modulus, O_bit_and, __,
-__, __, O_multiply, O_add, __, O_subtract, __, O_divide,
-__, __, __, __, __, __, __, __,
-__, __, __, __, O_left_shift, __, O_right_shift, __,
-__, __, __, __, __, __, __, __,
-__, __, __, __, __, __, __, __,
-__, __, __, __, __, __, __, __,
-__, __, __, __, __, __, O_bit_exclusive_or, __,
-__, __, __, __, __, __, __, __,
-__, __, __, __, __, __, __, __,
-__, __, __, __, __, __, __, __,
-__, __, __, __, O_bit_inclusive_or, __, __, __,
-
-__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
-__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
-__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
-__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
-__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
-__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
-__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
-__, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __
+static const operatorT op_encoding[256] =
+{ /* maps ASCII->operators */
+
+ __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
+ __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
+
+ __, O_bit_or_not, __, __, __, O_modulus, O_bit_and, __,
+ __, __, O_multiply, O_add, __, O_subtract, __, O_divide,
+ __, __, __, __, __, __, __, __,
+ __, __, __, __, O_left_shift, __, O_right_shift, __,
+ __, __, __, __, __, __, __, __,
+ __, __, __, __, __, __, __, __,
+ __, __, __, __, __, __, __, __,
+ __, __, __, __, __, __, O_bit_exclusive_or, __,
+ __, __, __, __, __, __, __, __,
+ __, __, __, __, __, __, __, __,
+ __, __, __, __, __, __, __, __,
+ __, __, __, __, O_bit_inclusive_or, __, __, __,
+
+ __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
+ __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
+ __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
+ __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
+ __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
+ __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
+ __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __,
+ __, __, __, __, __, __, __, __, __, __, __, __, __, __, __, __
};
* 3 * / % << >>
*/
static const operator_rankT
-op_rank [] = { 0, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1 };
+ op_rank[] =
+{0, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1};
\f
/* Return resultP->X_seg. */
-segT expr(rank, resultP)
-register operator_rankT rank; /* Larger # is higher rank. */
-register expressionS *resultP; /* Deliver result here. */
+segT
+expr (rank, resultP)
+ operator_rankT rank; /* Larger # is higher rank. */
+ expressionS *resultP; /* Deliver result here. */
{
- expressionS right;
- register operatorT op_left;
- register char c_left; /* 1st operator character. */
- register operatorT op_right;
- register char c_right;
-
- know(rank >= 0);
- (void)operand (resultP);
- know(* input_line_pointer != ' '); /* Operand() gobbles spaces. */
- c_left = * input_line_pointer; /* Potential operator character. */
- op_left = op_encoding [c_left];
- while (op_left != O_illegal && op_rank [(int) op_left] > rank)
+ expressionS right;
+ operatorT op_left;
+ char c_left; /* 1st operator character. */
+ operatorT op_right;
+ char c_right;
+
+ know (rank >= 0);
+ (void) operand (resultP);
+ know (*input_line_pointer != ' '); /* Operand() gobbles spaces. */
+ c_left = *input_line_pointer; /* Potential operator character. */
+ op_left = op_encoding[c_left];
+ while (op_left != O_illegal && op_rank[(int) op_left] > rank)
{
- 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++; /*->after 1st character of operator. */
+ /* Operators "<<" and ">>" have 2 characters. */
+ if (*input_line_pointer == c_left && (c_left == '<' || c_left == '>'))
{
- input_line_pointer ++;
+ input_line_pointer++;
} /*->after operator. */
- if (SEG_ABSENT == expr (op_rank[(int) op_left], &right))
+ if (absent_section == expr (op_rank[(int) op_left], &right))
{
- as_warn("Missing operand value assumed absolute 0.");
- resultP->X_add_number = 0;
- resultP->X_subtract_symbol = NULL;
- resultP->X_add_symbol = NULL;
- resultP->X_seg = SEG_ABSOLUTE;
+ as_warn ("Missing operand value assumed absolute 0.");
+ resultP->X_add_number = 0;
+ resultP->X_subtract_symbol = NULL;
+ resultP->X_add_symbol = NULL;
+ resultP->X_seg = absolute_section;
}
- know(* input_line_pointer != ' ');
- c_right = * input_line_pointer;
- op_right = op_encoding [c_right];
- if (* input_line_pointer == c_right && (c_right == '<' || c_right == '>'))
+ know (*input_line_pointer != ' ');
+ c_right = *input_line_pointer;
+ op_right = op_encoding[c_right];
+ if (*input_line_pointer == c_right && (c_right == '<' || c_right == '>'))
{
- input_line_pointer ++;
+ input_line_pointer++;
} /*->after operator. */
- know((int) op_right == 0
- || op_rank [(int) op_right] <= op_rank[(int) op_left]);
+ know ((int) op_right == 0 || op_rank[(int) op_right] <= op_rank[(int) op_left]);
/* input_line_pointer->after right-hand quantity. */
/* left-hand quantity in resultP */
/* right-hand quantity in right. */
/* operator in op_left. */
- if (resultP->X_seg == SEG_PASS1 || right . X_seg == SEG_PASS1)
+ if (resultP->X_seg == pass1_section || right.X_seg == pass1_section)
{
- resultP->X_seg = SEG_PASS1;
+ resultP->X_seg = pass1_section;
}
else
{
- if (resultP->X_seg == SEG_BIG)
+ if (resultP->X_seg == big_section)
{
- as_warn("Left operand of %c is a %s. Integer 0 assumed.",
- c_left, resultP->X_add_number > 0 ? "bignum" : "float");
- resultP->X_seg = SEG_ABSOLUTE;
+ as_warn ("Left operand of %c is a %s. Integer 0 assumed.",
+ c_left, resultP->X_add_number > 0 ? "bignum" : "float");
+ resultP->X_seg = absolute_section;
resultP->X_add_symbol = 0;
resultP->X_subtract_symbol = 0;
resultP->X_add_number = 0;
}
- if (right . X_seg == SEG_BIG)
+ if (right.X_seg == big_section)
{
- as_warn("Right operand of %c is a %s. Integer 0 assumed.",
- c_left, right . X_add_number > 0 ? "bignum" : "float");
- right . X_seg = SEG_ABSOLUTE;
- right . X_add_symbol = 0;
- right . X_subtract_symbol = 0;
- right . X_add_number = 0;
+ as_warn ("Right operand of %c is a %s. Integer 0 assumed.",
+ c_left, right.X_add_number > 0 ? "bignum" : "float");
+ right.X_seg = absolute_section;
+ right.X_add_symbol = 0;
+ right.X_subtract_symbol = 0;
+ right.X_add_number = 0;
}
if (op_left == O_subtract)
{
/*
- * Convert - into + by exchanging symbols and negating number.
+ * Convert - into + by exchanging symbolS and negating number.
* I know -infinity can't be negated in 2's complement:
* but then it can't be subtracted either. This trick
* does not cause any further inaccuracy.
*/
- register symbolS * symbolP;
+ symbolS *symbolP;
- right . X_add_number = - right . X_add_number;
- symbolP = right . X_add_symbol;
- right . X_add_symbol = right . X_subtract_symbol;
- right . X_subtract_symbol = symbolP;
+ right.X_add_number = -right.X_add_number;
+ symbolP = right.X_add_symbol;
+ right.X_add_symbol = right.X_subtract_symbol;
+ right.X_subtract_symbol = symbolP;
if (symbolP)
{
- right . X_seg = SEG_DIFFERENCE;
+ right.X_seg = diff_section;
}
op_left = O_add;
}
\f
if (op_left == O_add)
{
- segT seg1;
- segT seg2;
-
- know(resultP->X_seg == SEG_DATA
- || resultP->X_seg == SEG_TEXT
- || resultP->X_seg == SEG_BSS
- || resultP->X_seg == SEG_UNKNOWN
- || resultP->X_seg == SEG_DIFFERENCE
- || resultP->X_seg == SEG_ABSOLUTE
- || resultP->X_seg == SEG_PASS1);
- know(right . X_seg == SEG_DATA
- || right . X_seg == SEG_TEXT
- || right . X_seg == SEG_BSS
- || right . X_seg == SEG_UNKNOWN
- || right . X_seg == SEG_DIFFERENCE
- || right . X_seg == SEG_ABSOLUTE
- || right . X_seg == SEG_PASS1);
-
- clean_up_expression (& right);
+ segT seg1;
+ segT seg2;
+#if 0 /* @@ This rejects stuff in common sections too. Figure out some
+ reasonable test, and make it clean... */
+#if !defined (MANY_SEGMENTS) && !defined (OBJ_ECOFF)
+ know (resultP->X_seg == data_section || resultP->X_seg == text_section || resultP->X_seg == bss_section || resultP->X_seg == undefined_section || resultP->X_seg == diff_section || resultP->X_seg == absolute_section || resultP->X_seg == pass1_section || resultP->X_seg == reg_section);
+
+ know (right.X_seg == data_section || right.X_seg == text_section || right.X_seg == bss_section || right.X_seg == undefined_section || right.X_seg == diff_section || right.X_seg == absolute_section || right.X_seg == pass1_section);
+#endif
+#endif /* 0 */
+ clean_up_expression (&right);
clean_up_expression (resultP);
- seg1 = expr_part (& resultP->X_add_symbol, right . X_add_symbol);
- seg2 = expr_part (& resultP->X_subtract_symbol, right . X_subtract_symbol);
- if (seg1 == SEG_PASS1 || seg2 == SEG_PASS1) {
- need_pass_2 = 1;
- resultP->X_seg = SEG_PASS1;
- } else if (seg2 == SEG_ABSOLUTE)
- resultP->X_seg = seg1;
- else if (seg1 != SEG_UNKNOWN
- && seg1 != SEG_ABSOLUTE
- && seg2 != SEG_UNKNOWN
- && seg1 != seg2) {
- know(seg2 != SEG_ABSOLUTE);
- know(resultP->X_subtract_symbol);
-
- know(seg1 == SEG_TEXT || seg1 == SEG_DATA || seg1== SEG_BSS);
- know(seg2 == SEG_TEXT || seg2 == SEG_DATA || seg2== SEG_BSS);
- know(resultP->X_add_symbol);
- know(resultP->X_subtract_symbol);
- as_bad("Expression too complex: forgetting %s - %s",
- S_GET_NAME(resultP->X_add_symbol),
- S_GET_NAME(resultP->X_subtract_symbol));
- resultP->X_seg = SEG_ABSOLUTE;
- /* Clean_up_expression() will do the rest. */
- } else
- resultP->X_seg = SEG_DIFFERENCE;
-
- resultP->X_add_number += right . X_add_number;
+ seg1 = expr_part (&resultP->X_add_symbol, right.X_add_symbol);
+ seg2 = expr_part (&resultP->X_subtract_symbol, right.X_subtract_symbol);
+ if (seg1 == pass1_section || seg2 == pass1_section)
+ {
+ need_pass_2 = 1;
+ resultP->X_seg = pass1_section;
+ }
+ else if (seg2 == absolute_section)
+ resultP->X_seg = seg1;
+ else if (seg1 != undefined_section
+ && seg1 != absolute_section
+ && seg2 != undefined_section
+ && seg1 != seg2)
+ {
+ know (seg2 != absolute_section);
+ know (resultP->X_subtract_symbol);
+#ifndef MANY_SEGMENTS
+#ifndef OBJ_ECOFF
+ know (seg1 == text_section || seg1 == data_section || seg1 == bss_section);
+ know (seg2 == text_section || seg2 == data_section || seg2 == bss_section);
+#endif
+#endif
+ know (resultP->X_add_symbol);
+ know (resultP->X_subtract_symbol);
+ as_bad ("Expression too complex: forgetting %s - %s",
+ S_GET_NAME (resultP->X_add_symbol),
+ S_GET_NAME (resultP->X_subtract_symbol));
+ resultP->X_seg = absolute_section;
+ /* Clean_up_expression() will do the rest. */
+ }
+ else
+ resultP->X_seg = diff_section;
+
+ resultP->X_add_number += right.X_add_number;
clean_up_expression (resultP);
- }
+ }
else
{ /* Not +. */
- if (resultP->X_seg == SEG_UNKNOWN || right . X_seg == SEG_UNKNOWN)
+ if (resultP->X_seg == undefined_section || right.X_seg == undefined_section)
{
- resultP->X_seg = SEG_PASS1;
+ resultP->X_seg = pass1_section;
need_pass_2 = 1;
}
else
{
resultP->X_subtract_symbol = NULL;
resultP->X_add_symbol = NULL;
- /* Will be SEG_ABSOLUTE. */
- if (resultP->X_seg != SEG_ABSOLUTE || right . X_seg != SEG_ABSOLUTE)
+ /* Will be absolute_section. */
+ if (resultP->X_seg != absolute_section || right.X_seg != absolute_section)
{
- as_bad("Relocation error. Absolute 0 assumed.");
- resultP->X_seg = SEG_ABSOLUTE;
+ as_bad ("Relocation error: Symbolic expressions may only involve");
+ as_bad (" addition and subtraction. Absolute 0 assumed.");
+ resultP->X_seg = absolute_section;
resultP->X_add_number = 0;
}
else
switch (op_left)
{
case O_bit_inclusive_or:
- resultP->X_add_number |= right . X_add_number;
+ resultP->X_add_number |= right.X_add_number;
break;
case O_modulus:
- if (right . X_add_number)
+ if (right.X_add_number)
{
- resultP->X_add_number %= right . X_add_number;
+ resultP->X_add_number %= right.X_add_number;
}
else
{
- as_warn("Division by 0. 0 assumed.");
+ as_warn ("Division by 0. Result of 0 substituted.");
resultP->X_add_number = 0;
}
break;
case O_bit_and:
- resultP->X_add_number &= right . X_add_number;
+ resultP->X_add_number &= right.X_add_number;
break;
case O_multiply:
- resultP->X_add_number *= right . X_add_number;
+ resultP->X_add_number *= right.X_add_number;
break;
case O_divide:
- if (right . X_add_number)
+ if (right.X_add_number)
{
- resultP->X_add_number /= right . X_add_number;
+ resultP->X_add_number /= right.X_add_number;
}
else
{
- as_warn("Division by 0. 0 assumed.");
+ as_warn ("Division by 0. 0 assumed.");
resultP->X_add_number = 0;
}
break;
case O_left_shift:
- resultP->X_add_number <<= right . X_add_number;
+ resultP->X_add_number <<= right.X_add_number;
break;
case O_right_shift:
- resultP->X_add_number >>= right . X_add_number;
+ /* @@ We should distinguish signed versus
+ unsigned here somehow. */
+ resultP->X_add_number >>= right.X_add_number;
break;
case O_bit_exclusive_or:
- resultP->X_add_number ^= right . X_add_number;
+ resultP->X_add_number ^= right.X_add_number;
break;
case O_bit_or_not:
- resultP->X_add_number |= ~ right . X_add_number;
+ resultP->X_add_number |= ~right.X_add_number;
break;
default:
- BAD_CASE(op_left);
+ BAD_CASE (op_left);
break;
- } /* switch(operator) */
+ } /* switch(operator) */
}
} /* If we have to force need_pass_2. */
} /* If operator was +. */
* lines end in end-of-line.
*/
char
-get_symbol_end()
+get_symbol_end ()
{
- register char c;
+ char c;
- while (is_part_of_name(c = * input_line_pointer ++))
+ while (is_part_of_name (c = *input_line_pointer++))
;
- * -- input_line_pointer = 0;
+ *--input_line_pointer = 0;
return (c);
}
-/*
- * Local Variables:
- * comment-column: 0
- * fill-column: 131
- * End:
- */
-/* end: expr.c */
+unsigned int
+get_single_number ()
+{
+ expressionS exp;
+ operand (&exp);
+ return exp.X_add_number;
+
+}
+
+/* end of expr.c */
projects / binutils.git / blobdiff