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Add support for delay slot insns.

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This commit is contained in:
Nick Clifton 1998-11-13 01:15:29 +00:00
parent 7a0737c808
commit b91e1ec1e4
2 changed files with 67 additions and 34 deletions
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3
gas/ChangeLog
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@ -5,6 +5,9 @@ Thu Nov 12 19:21:24 1998 Dave Brolley <brolley@cygnus.com>
Thu Nov 12 10:54:16 1998 Nick Clifton <nickc@cygnus.com>
* config/tc-fr30.c (fr30_is_colon_insn): New name for
fr30_is_label_start(). Also checks for delay slot insns.
* config/tc-fr30.c (fr30_is_label_start): New function: Handle
FR30 instructions which contain a colon in the mnemonic.

98
gas/config/tc-fr30.c
View File

@ -557,64 +557,94 @@ md_atof (type, litP, sizeP)
return 0;
}
static char
restore_colon (advance_i_l_p_by)
int advance_i_l_p_by;
{
char c;
/* Restore the colon, and advance input_line_pointer to
the end of the new symbol. */
* input_line_pointer = ':';
input_line_pointer += advance_i_l_p_by;
c = * input_line_pointer;
* input_line_pointer = 0;
return c;
}
/* Determines if the symbol starting at START and ending in
a colon that was at the location pointed to by INPUT_LINE_POINTER
(but which has now been replaced bu a NUL) is in fact an
LDI:8, LDI:20 or LDI:32 instruction. If it is, then it
restores the colon, adbvances INPUT_LINE_POINTER to the real end
of the instruction/symbol, and returns the character that really
terminated the symbol. Otherwise it returns 0. */
LDI:8, LDI:20, LDI:32, CALL:D. JMP:D, RET:D or Bcc:D instruction.
If it is, then it restores the colon, adbvances INPUT_LINE_POINTER
to the real end of the instruction/symbol, and returns the character
that really terminated the symbol. Otherwise it returns 0. */
char
fr30_is_label_start (start)
fr30_is_colon_insn (start)
char * start;
{
char * i_l_p = input_line_pointer;
char c;
/* Check to see if the symbol parsed so far is 'ldi' */
if ( (start[0] != 'l' && start[0] != 'L')
|| (start[1] != 'd' && start[1] != 'D')
|| (start[2] != 'i' && start[2] != 'I')
|| start[3] != 0)
return 0;
{
/* Nope - check to see a 'd' follows the colon. */
if ( (i_l_p[1] == 'd' || i_l_p[1] == 'D')
&& (i_l_p[2] == ' ' || i_l_p[2] == '\t' || i_l_p[2] == '\n'))
{
/* Yup - it might be delay slot instruction. */
int i;
static char * delay_insns [] =
{
"call", "jmp", "ret", "bra", "bno",
"beq", "bne", "bc", "bnc", "bn", "bp",
"bv", "bnv", "blt", "bge", "ble", "bgt",
"bls", "bhi"
};
for (i = sizeof (delay_insns) / sizeof (delay_insns[0]); i--;)
{
char * insn = delay_insns[i];
int len = strlen (insn);
if (start [len] != 0)
continue;
while (len --)
{
if (tolower (start [len]) != insn [len])
break;
}
if (len == -1)
return restore_colon (1);
}
}
/* Nope - it is a normal label. */
return 0;
}
/* Check to see if the text following the colon is '8' */
if (i_l_p[1] == '8' && (i_l_p[2] == ' ' || i_l_p[2] == '\t'))
{
/* Restore the colon, and advance input_line_pointer to
the end of the new symbol. */
* i_l_p = ':';
input_line_pointer += 2;
c = * input_line_pointer;
* input_line_pointer = 0;
return c;
return restore_colon (2);
}
/* Check to see if the text following the colon is '20' */
if (i_l_p[1] == '2' && i_l_p[2] =='0' && (i_l_p[3] == ' ' || i_l_p[3] == '\t'))
else if (i_l_p[1] == '2' && i_l_p[2] =='0' && (i_l_p[3] == ' ' || i_l_p[3] == '\t'))
{
/* Restore the colon, and advance input_line_pointer to
the end of the new symbol. */
* i_l_p = ':';
input_line_pointer += 3;
c = * input_line_pointer;
* input_line_pointer = 0;
return c;
return restore_colon (3);
}
/* Check to see if the text following the colon is '32' */
if (i_l_p[1] == '3' && i_l_p[2] =='2' && (i_l_p[3] == ' ' || i_l_p[3] == '\t'))
else if (i_l_p[1] == '3' && i_l_p[2] =='2' && (i_l_p[3] == ' ' || i_l_p[3] == '\t'))
{
/* Restore the colon, and advance input_line_pointer to
the end of the new symbol. */
* i_l_p = ':';
input_line_pointer += 3;
c = * input_line_pointer;
* input_line_pointer = 0;
return c;
return restore_colon (3);
}
return 0;