* config/tc-tic80.c: Numerous changes and additions to flesh
out functions that were previously just stubs, and fix some problems found using the new TIc80 testsuite cases.
This commit is contained in:
Fred Fish
parent
527579ee7b
commit
11e081968e
@ -1,3 +1,11 @@
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start-sanitize-tic80
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Tue Feb 11 15:13:39 1997 Fred Fish <fnf@cygnus.com>
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* config/tc-tic80.c: Numerous changes and additions to flesh
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out functions that were previously just stubs, and fix some
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problems found using the new TIc80 testsuite cases.
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end-sanitize-tic80
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Tue Feb 11 15:52:22 1997 Ian Lance Taylor <ian@cygnus.com>
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* config/tc-mips.c (mips16_ip): Handle %gprel modifier.
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@ -21,6 +21,11 @@
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#include "as.h"
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#include "opcode/tic80.h"
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#define internal_error(what) \
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as_fatal("internal error:%s:%d: %s\n",__FILE__,__LINE__,what)
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#define internal_error_a(what,arg) \
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as_fatal("internal error:%s:%d: %s %d\n",__FILE__,__LINE__,what,arg)
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/* Generic assembler global variables which must be defined by all targets. */
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@ -31,8 +36,8 @@ const char comment_chars[] = ";";
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const char line_comment_chars[] = ";*";
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/* Characters which may be used to separate multiple commands on a
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single line. */
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const char line_separator_chars[] = ";";
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single line. */
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const char line_separator_chars[] = "";
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/* Characters which are used to indicate an exponent in a floating
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point number. */
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@ -59,10 +64,12 @@ const pseudo_typeS md_pseudo_table[] =
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static struct hash_control *tic80_hash;
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static struct tic80_opcode * find_opcode PARAMS ((struct tic80_opcode *, expressionS []));
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static unsigned long build_insn PARAMS ((struct tic80_opcode *, expressionS *, unsigned long insn));
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static void build_insn PARAMS ((struct tic80_opcode *, expressionS *));
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static int get_operands PARAMS ((expressionS exp[]));
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static int reg_name_search PARAMS ((char *name));
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static int register_name PARAMS ((expressionS *expressionP));
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static int is_bitnum PARAMS ((expressionS *expressionP));
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static int is_ccode PARAMS ((expressionS *expressionP));
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static int const_overflow PARAMS ((unsigned long num, int bits, int flags));
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int
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@ -70,7 +77,7 @@ md_estimate_size_before_relax (fragP, segment_type)
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fragS *fragP;
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segT segment_type;
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{
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as_fatal ("Relaxation is a luxury we can't afford\n");
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internal_error ("Relaxation is a luxury we can't afford");
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return (-1);
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}
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@ -140,41 +147,6 @@ md_atof (type, litP, sizeP)
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return (NULL);
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}
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/* reg_name_search does a binary search of the tic80_pre_defined_registers
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array to see if "name" is a valid regiter name. Returns the register
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number from the array on success, or -1 on failure. */
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static int
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reg_name_search (name)
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char *name;
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{
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int middle, low, high;
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int cmp;
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low = 0;
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high = tic80_num_regs - 1;
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do
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{
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middle = (low + high) / 2;
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cmp = strcasecmp (name, tic80_pre_defined_registers[middle].name);
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if (cmp < 0)
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{
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high = middle - 1;
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}
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else if (cmp > 0)
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{
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low = middle + 1;
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}
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else
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{
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return (tic80_pre_defined_registers[middle].value);
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}
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}
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while (low <= high);
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return (-1);
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}
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/* register_name() checks the string at input_line_pointer
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to see if it is a valid register name */
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@ -182,11 +154,11 @@ static int
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register_name (expressionP)
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expressionS *expressionP;
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{
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int reg_number;
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int reg_number, class;
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char c;
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char *p = input_line_pointer;
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while (*p != '\000' && *p != '\n' && *p != '\r' && *p != ',' && *p != ' ' && *p != ')')
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while (*p != '\000' && *p != '\n' && *p != '\r' && *p != ',' && *p != ' ' && *p != '(' && *p != ')')
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p++;
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c = *p;
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@ -197,8 +169,9 @@ register_name (expressionP)
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/* look to see if it's in the register table */
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reg_number = reg_name_search (input_line_pointer);
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if (reg_number >= 0)
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class = TIC80_OPERAND_FPA | TIC80_OPERAND_CR | TIC80_OPERAND_GPR;
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reg_number = tic80_symbol_to_value (input_line_pointer, class);
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if (reg_number != -1)
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{
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expressionP -> X_op = O_register;
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/* temporarily store a pointer to the string here */
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@ -214,6 +187,116 @@ register_name (expressionP)
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return (0);
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}
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/* is_bitnum() checks the string at input_line_pointer
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to see if it is a valid predefined symbol for the BITNUM field */
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static int
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is_bitnum (expressionP)
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expressionS *expressionP;
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{
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int bitnum_val, class;
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char c;
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char *p = input_line_pointer;
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while (*p != '\000' && *p != '\n' && *p != '\r' && *p != ',' && *p != ' ' && *p != '(' && *p != ')')
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p++;
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c = *p;
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if (c)
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{
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*p++ = '\000';
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}
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/* look to see if it's in the register table */
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class = TIC80_OPERAND_BITNUM;
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bitnum_val = tic80_symbol_to_value (input_line_pointer, class);
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if (bitnum_val != -1)
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{
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expressionP -> X_op = O_constant;
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/* temporarily store a pointer to the string here */
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expressionP -> X_op_symbol = (struct symbol *) input_line_pointer;
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/* Bitnums are stored as one's complement */
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expressionP -> X_add_number = ~bitnum_val & 0x1F;
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input_line_pointer = p;
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return (1);
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}
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if (c)
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{
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*(p - 1) = c;
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}
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return (0);
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}
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/* is_ccode() checks the string at input_line_pointer
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to see if it is a valid predefined symbol for the a condition code */
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static int
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is_ccode (expressionP)
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expressionS *expressionP;
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{
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int ccode_val, class;
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char c;
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char *p = input_line_pointer;
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while (*p != '\000' && *p != '\n' && *p != '\r' && *p != ',' && *p != ' ' && *p != '(' && *p != ')')
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p++;
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c = *p;
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if (c)
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{
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*p++ = '\000';
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}
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/* look to see if it's in the register table */
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class = TIC80_OPERAND_CC;
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ccode_val = tic80_symbol_to_value (input_line_pointer, class);
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if (ccode_val != -1)
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{
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expressionP -> X_op = O_constant;
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/* temporarily store a pointer to the string here */
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expressionP -> X_op_symbol = (struct symbol *) input_line_pointer;
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expressionP -> X_add_number = ccode_val & 0x1F;
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input_line_pointer = p;
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return (1);
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}
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if (c)
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{
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*(p - 1) = c;
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}
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return (0);
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}
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/* Check to see if the constant value in NUM will fit in a field of
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width BITS if it has flags FLAGS. */
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static int
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const_overflow (num, bits, flags)
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unsigned long num;
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int bits;
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int flags;
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{
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long min, max;
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int retval = 0;
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/* Only need to check fields less than 32 bits wide */
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if (bits < 32)
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if (flags & TIC80_OPERAND_SIGNED)
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{
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max = (1 << (bits - 1)) - 1;
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min = - (1 << (bits - 1));
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retval = ((long) num > max) || ((long) num < min);
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}
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else
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{
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max = (1 << bits) - 1;
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min = 0;
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retval = (num > max) || (num < min);
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}
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return (retval);
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}
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/* get_operands() parses a string of operands and fills in a passed array of
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expressions in EXP.
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@ -307,9 +390,12 @@ get_operands (exp)
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input_line_pointer = p;
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/* Check to see if it might be a register name */
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/* Check to see if it might be a register name or some other
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predefined symbol name that translates into a constant value. */
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if (!register_name (&exp[numexp]))
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if (!register_name (&exp[numexp]) &&
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!is_bitnum (&exp[numexp]) &&
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!is_ccode (&exp[numexp]))
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{
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/* parse as an expression */
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expression (&exp[numexp]);
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@ -334,7 +420,9 @@ get_operands (exp)
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exp[numexp++].X_add_number = TIC80_OPERAND_PARENS;
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}
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exp[numexp].X_op = 0;
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/* Mark the end of the valid operands with an illegal expression. */
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exp[numexp].X_op = O_illegal;
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return (numexp);
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}
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@ -347,23 +435,126 @@ get_operands (exp)
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previous non-O_absent expression, such as ":m" or ":s" modifiers or
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register numbers enclosed in parens like "(r10)".
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It then looks at all opcodes with the same name and use the operands to
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It then looks at all opcodes with the same name and uses the operands to
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choose the correct opcode. */
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static struct tic80_opcode *
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find_opcode (opcode, myops)
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struct tic80_opcode *opcode;
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expressionS myops[];
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{
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int i, match, done, numops;
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struct tic80_opcode *next_opcode;
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int numexp; /* Number of expressions from parsing operands */
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int expi; /* Index of current expression to match */
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int opi; /* Index of current operand to match */
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int match = 0; /* Set to 1 when an operand match is found */
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struct tic80_opcode *opc = opcode; /* Pointer to current opcode table entry */
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const struct tic80_opcode *end; /* Pointer to end of opcode table */
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match = 0;
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/* First parse all the operands so we only have to do it once. There may
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be more expressions generated than there are operands. */
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/* First parse all the operands so we only have to do it once. */
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numexp = get_operands (myops);
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get_operands (myops);
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/* For each opcode with the same name, try to match it against the parsed
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operands. */
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end = tic80_opcodes + tic80_num_opcodes;
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while (!match && (opc < end) && (strcmp (opc -> name, opcode -> name) == 0))
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{
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/* Start off assuming a match. If we find a mismatch, then this is
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reset and the operand/expr matching loop terminates with match
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equal to zero, which allows us to try the next opcode. */
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match = 1;
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/* For each expression, try to match it against the current operand
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for the current opcode. Upon any mismatch, we abandon further
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matching for the current opcode table entry. */
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for (expi = 0, opi = -1; (expi < numexp) && match; expi++)
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{
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int bits, flags, X_op, num;
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X_op = myops[expi].X_op;
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num = myops[expi].X_add_number;
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if (X_op != O_absent)
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{
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/* The O_absent expressions apply to the previously seen
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operand, so only increment the operand index when the
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current expression needs to be matched against the next
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operand. */
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opi++;
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}
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flags = tic80_operands[opc -> operands[opi]].flags;
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bits = tic80_operands[opc -> operands[opi]].bits;
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switch (X_op)
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{
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case O_register:
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/* Also check that registers that are supposed to be even actually
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are even. */
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if (((flags & TIC80_OPERAND_GPR) != (num & TIC80_OPERAND_GPR)) ||
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((flags & TIC80_OPERAND_FPA) != (num & TIC80_OPERAND_FPA)) ||
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((flags & TIC80_OPERAND_CR) != (num & TIC80_OPERAND_CR)) ||
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((flags & TIC80_OPERAND_EVEN) && (num & 1)) ||
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const_overflow (num & ~TIC80_OPERAND_MASK, bits, flags))
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{
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match = 0;
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}
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break;
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case O_constant:
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if ((flags & TIC80_OPERAND_ENDMASK) && (num == 32))
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{
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/* Endmask values of 0 and 32 give identical results */
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num = 0;
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}
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if ((flags & (TIC80_OPERAND_FPA | TIC80_OPERAND_GPR)) ||
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const_overflow (num, bits, flags))
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{
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match = 0;
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}
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break;
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case O_illegal:
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case O_absent:
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case O_symbol:
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case O_symbol_rva:
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case O_big:
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case O_uminus:
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case O_bit_not:
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case O_logical_not:
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case O_multiply:
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case O_divide:
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case O_modulus:
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case O_left_shift:
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case O_right_shift:
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case O_bit_inclusive_or:
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case O_bit_or_not:
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case O_bit_exclusive_or:
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case O_bit_and:
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case O_add:
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case O_subtract:
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case O_eq:
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case O_ne:
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case O_lt:
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case O_le:
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case O_ge:
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case O_gt:
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case O_logical_and:
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case O_logical_or:
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case O_max:
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default:
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internal_error_a ("unhandled expression type", X_op);
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}
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}
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if (!match)
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{
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opc++;
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}
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}
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return (match ? opc : NULL);
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#if 0
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/* Now search the opcode table table for one with operands that
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matches what we've got. */
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@ -383,23 +574,23 @@ find_opcode (opcode, myops)
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break;
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}
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if (flags & TIC80_OPERAND_GPR)
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if (flags & (TIC80_OPERAND_GPR | TIC80_OPERAND_FPA | TIC80_OPERAND_CR))
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{
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if ((X_op != O_register) ||
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((flags & OPERAND_ACC) != (num & OPERAND_ACC)) ||
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((flags & OPERAND_FLAG) != (num & OPERAND_FLAG)) ||
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((flags & OPERAND_CONTROL) != (num & OPERAND_CONTROL)))
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((flags & TIC80_OPERAND_GPR) != (num & TIC80_OPERAND_GPR)) ||
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((flags & TIC80_OPERAND_FPA) != (num & TIC80_OPERAND_FPA)) ||
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((flags & TIC80_OPERAND_CR) != (num & TIC80_OPERAND_CR)))
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{
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match=0;
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break;
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}
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}
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if (((flags & OPERAND_MINUS) && ((X_op != O_absent) || (num != OPERAND_MINUS))) ||
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((flags & OPERAND_PLUS) && ((X_op != O_absent) || (num != OPERAND_PLUS))) ||
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((flags & OPERAND_ATMINUS) && ((X_op != O_absent) || (num != OPERAND_ATMINUS))) ||
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((flags & OPERAND_ATPAR) && ((X_op != O_absent) || (num != OPERAND_ATPAR))) ||
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((flags & OPERAND_ATSIGN) && ((X_op != O_absent) || (num != OPERAND_ATSIGN))))
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if (((flags & TIC80_OPERAND_MINUS) && ((X_op != O_absent) || (num != TIC80_OPERAND_MINUS))) ||
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((flags & TIC80_OPERAND_PLUS) && ((X_op != O_absent) || (num != TIC80_OPERAND_PLUS))) ||
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((flags & TIC80_OPERAND_ATMINUS) && ((X_op != O_absent) || (num != TIC80_OPERAND_ATMINUS))) ||
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((flags & TIC80_OPERAND_ATPAR) && ((X_op != O_absent) || (num != TIC80_OPERAND_ATPAR))) ||
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((flags & TIC80_OPERAND_ATSIGN) && ((X_op != O_absent) || (num != TIC80_OPERAND_ATSIGN))))
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{
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match=0;
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break;
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@ -431,12 +622,12 @@ find_opcode (opcode, myops)
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/* fix that here. */
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for (i=0; opcode->operands[i]; i++)
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{
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if ((tic80_operands[opcode->operands[i]].flags & OPERAND_EVEN) &&
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if ((tic80_operands[opcode->operands[i]].flags & TIC80_OPERAND_EVEN) &&
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(myops[i].X_add_number & 1))
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as_fatal("Register number must be EVEN");
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as_fatal ("Register number must be EVEN");
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if (myops[i].X_op == O_register)
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{
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if (!(tic80_operands[opcode->operands[i]].flags & OPERAND_REG))
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if (!(tic80_operands[opcode->operands[i]].flags & TIC80_OPERAND_REG))
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{
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myops[i].X_op = O_symbol;
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myops[i].X_add_symbol = symbol_find_or_make ((char *)myops[i].X_op_symbol);
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@ -445,19 +636,134 @@ find_opcode (opcode, myops)
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}
|
||||
}
|
||||
}
|
||||
return opcode;
|
||||
|
||||
#endif
|
||||
}
|
||||
|
||||
/* build_insn takes a pointer to the opcode entry in the opcode table
|
||||
and the array of operand expressions and returns the instruction */
|
||||
and the array of operand expressions and writes out the instruction. */
|
||||
|
||||
static unsigned long
|
||||
build_insn (opcode, opers, insn)
|
||||
static void
|
||||
build_insn (opcode, opers)
|
||||
struct tic80_opcode *opcode;
|
||||
expressionS *opers;
|
||||
unsigned long insn;
|
||||
{
|
||||
return (0);
|
||||
int expi; /* Index of current expression to match */
|
||||
int opi; /* Index of current operand to match */
|
||||
unsigned long insn[2]; /* Instruction and long immediate (if any) */
|
||||
int extended = 0; /* Nonzero if instruction is 8 bytes */
|
||||
char *f; /* Temporary pointer to output location */
|
||||
|
||||
/* Start with the raw opcode bits from the opcode table. */
|
||||
insn[0] = opcode -> opcode;
|
||||
|
||||
/* For each operand expression, insert the appropriate bits into the
|
||||
instruction . */
|
||||
for (expi = 0, opi = -1; opers[expi].X_op != O_illegal; expi++)
|
||||
{
|
||||
int bits, shift, flags, X_op, num;
|
||||
|
||||
X_op = opers[expi].X_op;
|
||||
num = opers[expi].X_add_number;
|
||||
if (X_op != O_absent)
|
||||
{
|
||||
/* The O_absent expressions apply to the previously seen
|
||||
operand, so only increment the operand index when the
|
||||
current expression needs to be matched against the next
|
||||
operand. */
|
||||
opi++;
|
||||
}
|
||||
else
|
||||
{
|
||||
/* Found a modifier that applies to the previously
|
||||
seen operand, so handle it. */
|
||||
switch (opers[expi].X_add_number)
|
||||
{
|
||||
case TIC80_OPERAND_M_SI | TIC80_OPERAND_M_LI:
|
||||
internal_error_a ("unhandled operand modifier", opers[expi].X_add_number);
|
||||
break;
|
||||
case TIC80_OPERAND_SCALED:
|
||||
internal_error_a ("unhandled operand modifier", opers[expi].X_add_number);
|
||||
break;
|
||||
case TIC80_OPERAND_PARENS:
|
||||
internal_error_a ("unhandled operand modifier", opers[expi].X_add_number);
|
||||
break;
|
||||
default:
|
||||
internal_error_a ("unhandled operand modifier", opers[expi].X_add_number);
|
||||
break;
|
||||
}
|
||||
}
|
||||
flags = tic80_operands[opcode -> operands[opi]].flags;
|
||||
bits = tic80_operands[opcode -> operands[opi]].bits;
|
||||
shift = tic80_operands[opcode -> operands[opi]].shift;
|
||||
|
||||
switch (X_op)
|
||||
{
|
||||
case O_register:
|
||||
num &= ~TIC80_OPERAND_MASK;
|
||||
insn[0] = insn[0] | (num << shift);
|
||||
break;
|
||||
case O_constant:
|
||||
if ((flags & TIC80_OPERAND_ENDMASK) && (num == 32))
|
||||
{
|
||||
/* Endmask values of 0 and 32 give identical results */
|
||||
num = 0;
|
||||
}
|
||||
/* Mask off upper bits, just it case it is signed and is negative */
|
||||
if (bits < 32)
|
||||
{
|
||||
num &= (1 << bits) - 1;
|
||||
insn[0] = insn[0] | (num << shift);
|
||||
}
|
||||
else
|
||||
{
|
||||
extended++;
|
||||
insn[1] = num;
|
||||
}
|
||||
break;
|
||||
case O_illegal:
|
||||
case O_absent:
|
||||
case O_symbol:
|
||||
case O_symbol_rva:
|
||||
case O_big:
|
||||
case O_uminus:
|
||||
case O_bit_not:
|
||||
case O_logical_not:
|
||||
case O_multiply:
|
||||
case O_divide:
|
||||
case O_modulus:
|
||||
case O_left_shift:
|
||||
case O_right_shift:
|
||||
case O_bit_inclusive_or:
|
||||
case O_bit_or_not:
|
||||
case O_bit_exclusive_or:
|
||||
case O_bit_and:
|
||||
case O_add:
|
||||
case O_subtract:
|
||||
case O_eq:
|
||||
case O_ne:
|
||||
case O_lt:
|
||||
case O_le:
|
||||
case O_ge:
|
||||
case O_gt:
|
||||
case O_logical_and:
|
||||
case O_logical_or:
|
||||
case O_max:
|
||||
default:
|
||||
internal_error_a ("unhandled expression", X_op);
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
/* Write out the instruction, either 4 or 8 bytes. */
|
||||
|
||||
f = frag_more (4);
|
||||
md_number_to_chars (f, insn[0], 4);
|
||||
if (extended)
|
||||
{
|
||||
f = frag_more (4);
|
||||
md_number_to_chars (f, insn[1], 4);
|
||||
}
|
||||
}
|
||||
|
||||
/* This is the main entry point for the machine-dependent assembler. STR points to a
|
||||
@ -472,7 +778,7 @@ md_assemble (str)
|
||||
char *scan;
|
||||
unsigned char *input_line_save;
|
||||
struct tic80_opcode *opcode;
|
||||
expressionS myops[6];
|
||||
expressionS myops[16];
|
||||
unsigned long insn;
|
||||
|
||||
/* Ensure there is something there to assemble. */
|
||||
@ -511,13 +817,11 @@ md_assemble (str)
|
||||
opcode = find_opcode (opcode, myops);
|
||||
if (opcode == NULL)
|
||||
{
|
||||
return;
|
||||
as_bad ("Invalid operands: '%s'", input_line_save);
|
||||
}
|
||||
|
||||
input_line_pointer = input_line_save;
|
||||
insn = build_insn (opcode, myops, 0);
|
||||
|
||||
/* FIXME - finish this */
|
||||
build_insn (opcode, myops);
|
||||
}
|
||||
|
||||
/* This function is called once, at assembler startup time. It should
|
||||
@ -588,7 +892,7 @@ md_apply_fix (fixP, val)
|
||||
fixS *fixP;
|
||||
long val;
|
||||
{
|
||||
as_fatal ("md_apply_fix() not implemented yet\n");
|
||||
internal_error ("md_apply_fix() not implemented yet");
|
||||
abort ();
|
||||
}
|
||||
|
||||
@ -602,7 +906,7 @@ long
|
||||
md_pcrel_from (fixP)
|
||||
fixS *fixP;
|
||||
{
|
||||
as_fatal ("md_pcrel_from() not implemented yet\n");
|
||||
internal_error ("md_pcrel_from() not implemented yet");
|
||||
abort ();
|
||||
}
|
||||
|
||||
@ -622,7 +926,7 @@ md_convert_frag (headers, seg, fragP)
|
||||
segT seg;
|
||||
fragS *fragP;
|
||||
{
|
||||
as_fatal ("md_convert_frag() not implemented yet\n");
|
||||
internal_error ("md_convert_frag() not implemented yet");
|
||||
abort ();
|
||||
}
|
||||
|
||||
@ -640,7 +944,7 @@ short
|
||||
tc_coff_fix2rtype (fixP)
|
||||
fixS *fixP;
|
||||
{
|
||||
as_fatal ("tc_coff_fix2rtype() not implemented yet\n");
|
||||
internal_error ("tc_coff_fix2rtype() not implemented yet");
|
||||
abort ();
|
||||
}
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user