(asm_output_function_prefix, function_prologue): Setup
From-SVN: r11915
This commit is contained in:
Stan Cox
parent
809c8c30be
commit
e5cb57e8b5
|
|
@ -72,14 +72,14 @@ struct processor_costs i486_cost = { /* 486 specific costs */
|
|||
40 /* cost of a divide/mod */
|
||||
};
|
||||
|
||||
struct processor_costs pentium_cost = { /* 486 specific costs */
|
||||
struct processor_costs pentium_cost = {
|
||||
1, /* cost of an add instruction */
|
||||
1, /* cost of a lea instruction */
|
||||
3, /* variable shift costs */
|
||||
2, /* constant shift costs */
|
||||
1, /* constant shift costs */
|
||||
12, /* cost of starting a multiply */
|
||||
1, /* cost of multiply per each bit set */
|
||||
40 /* cost of a divide/mod */
|
||||
25 /* cost of a divide/mod */
|
||||
};
|
||||
|
||||
struct processor_costs *ix86_cost = &pentium_cost;
|
||||
|
|
@ -1674,6 +1674,31 @@ ix86_unary_operator_ok (code, mode, operands)
|
|||
}
|
||||
|
||||
|
||||
|
||||
static rtx pic_label_rtx;
|
||||
|
||||
/* This function generates code for -fpic that loads %ebx with
|
||||
with the return address of the caller and then returns. */
|
||||
void
|
||||
asm_output_function_prefix (file, name)
|
||||
FILE * file;
|
||||
char * name;
|
||||
{
|
||||
rtx xops[2];
|
||||
int pic_reg_used = flag_pic && (current_function_uses_pic_offset_table
|
||||
|| current_function_uses_const_pool);
|
||||
xops[0] = pic_offset_table_rtx;
|
||||
xops[1] = stack_pointer_rtx;
|
||||
|
||||
if (pic_reg_used && TARGET_DEEP_BRANCH_PREDICTION)
|
||||
{
|
||||
pic_label_rtx = (rtx) gen_label_rtx ();
|
||||
ASM_OUTPUT_INTERNAL_LABEL (file, "L", CODE_LABEL_NUMBER (pic_label_rtx));
|
||||
output_asm_insn ("movl (%1),%0", xops);
|
||||
output_asm_insn ("ret", xops);
|
||||
}
|
||||
}
|
||||
|
||||
/* This function generates the assembly code for function entry.
|
||||
FILE is an stdio stream to output the code to.
|
||||
SIZE is an int: how many units of temporary storage to allocate. */
|
||||
|
|
@ -1719,16 +1744,23 @@ function_prologue (file, size)
|
|||
output_asm_insn ("push%L0 %0", xops);
|
||||
}
|
||||
|
||||
if (pic_reg_used)
|
||||
if (pic_reg_used && TARGET_PENTIUMPRO)
|
||||
{
|
||||
xops[0] = pic_offset_table_rtx;
|
||||
xops[1] = (rtx) gen_label_rtx ();
|
||||
xops[1] = pic_label_rtx;
|
||||
|
||||
output_asm_insn (AS1 (call,%P1), xops);
|
||||
ASM_OUTPUT_INTERNAL_LABEL (file, "L", CODE_LABEL_NUMBER (xops[1]));
|
||||
output_asm_insn (AS1 (pop%L0,%0), xops);
|
||||
output_asm_insn ("addl $_GLOBAL_OFFSET_TABLE_+[.-%P1],%0", xops);
|
||||
output_asm_insn ("addl $_GLOBAL_OFFSET_TABLE_,%0", xops);
|
||||
}
|
||||
else {
|
||||
xops[0] = pic_offset_table_rtx;
|
||||
xops[1] = (rtx) gen_label_rtx ();
|
||||
|
||||
output_asm_insn (AS1 (call,%P1), xops);
|
||||
ASM_OUTPUT_INTERNAL_LABEL (file, "L", CODE_LABEL_NUMBER (xops[1]));
|
||||
output_asm_insn (AS1 (pop%L0,%0), xops);
|
||||
output_asm_insn ("addl $_GLOBAL_OFFSET_TABLE_+[.-%P1],%0", xops);
|
||||
}
|
||||
}
|
||||
|
||||
/* Return 1 if it is appropriate to emit `ret' instructions in the
|
||||
|
|
@ -2526,9 +2558,53 @@ output_pic_addr_const (file, x, code)
|
|||
}
|
||||
}
|
||||
|
||||
|
||||
/* Append the correct conditional move suffix which corresponds to CODE */
|
||||
|
||||
static void
|
||||
put_condition_code (code, file)
|
||||
enum rtx_code code;
|
||||
FILE * file;
|
||||
{
|
||||
switch (code)
|
||||
{
|
||||
case NE:
|
||||
if (cc_prev_status.flags & CC_Z_IN_NOT_C)
|
||||
fputs ("b", file);
|
||||
else
|
||||
fputs ("ne", file);
|
||||
return;
|
||||
case EQ:
|
||||
if (cc_prev_status.flags & CC_Z_IN_NOT_C)
|
||||
fputs ("ae", file);
|
||||
else
|
||||
fputs ("e", file);
|
||||
return;
|
||||
case GE:
|
||||
fputs ("ge", file); return;
|
||||
case GT:
|
||||
fputs ("g", file); return;
|
||||
case LE:
|
||||
fputs ("le", file); return;
|
||||
case LT:
|
||||
fputs ("l", file); return;
|
||||
case GEU:
|
||||
fputs ("ae", file); return;
|
||||
case GTU:
|
||||
fputs ("a", file); return;
|
||||
case LEU:
|
||||
fputs ("be", file); return;
|
||||
case LTU:
|
||||
fputs ("b", file); return;
|
||||
default: output_operand_lossage ("Invalid %%C operand");
|
||||
}
|
||||
}
|
||||
|
||||
/* Meaning of CODE:
|
||||
f -- float insn (print a CONST_DOUBLE as a float rather than in hex).
|
||||
D,L,W,B,Q,S -- print the opcode suffix for specified size of operand.
|
||||
C -- print opcode suffix for set/cmov insn.
|
||||
N -- like C, but print reversed condition
|
||||
R -- print the prefix for register names.
|
||||
z -- print the opcode suffix for the size of the current operand.
|
||||
* -- print a star (in certain assembler syntax)
|
||||
|
|
@ -2651,6 +2727,15 @@ print_operand (file, x, code)
|
|||
}
|
||||
abort ();
|
||||
|
||||
/* This is used by the conditional move instructions. */
|
||||
case 'C':
|
||||
put_condition_code (GET_CODE (x), file);
|
||||
return;
|
||||
/* like above but reverse condition */
|
||||
case 'N':
|
||||
put_condition_code (reverse_condition (GET_CODE (x)), file);
|
||||
return;
|
||||
|
||||
default:
|
||||
{
|
||||
char str[50];
|
||||
|
|
@ -4396,7 +4481,7 @@ output_strlen_unroll (operands)
|
|||
|
||||
if (QI_REG_P (xops[1]))
|
||||
{
|
||||
/* on i586 it is faster to compare the hi- and lo- part */
|
||||
/* on i586 it is faster to compare the hi- and lo- part */
|
||||
/* as a kind of lookahead. If xoring both is zero, then one */
|
||||
/* of both *could* be zero, otherwith none of both is zero */
|
||||
/* this saves one instruction, on i486 this is slower */
|
||||
|
|
|
|||
Loading…
Reference in New Issue