/* Definitions for GCC. Part of the machine description for CRIS.
- Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004
+ Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
Free Software Foundation, Inc.
Contributed by Axis Communications. Written by Hans-Peter Nilsson.
just the "sym:GOTOFF" part. */
static int cris_pic_sympart_only = 0;
+/* In code for output macros, this is how we know whether e.g. constant
+ goes in code or in a static initializer. */
+static int in_code = 0;
+
/* Fix for reg_overlap_mentioned_p. */
static int cris_reg_overlap_mentioned_p (rtx, rtx);
static void cris_print_index (rtx, FILE *);
+static void cris_output_addr_const (FILE *, rtx);
+
static struct machine_function * cris_init_machine_status (void);
static rtx cris_struct_value_rtx (tree, int);
static bool cris_rtx_costs (rtx, int, int, int *);
static int cris_address_cost (rtx);
+static bool cris_pass_by_reference (CUMULATIVE_ARGS *, enum machine_mode,
+ tree, bool);
+static int cris_arg_partial_bytes (CUMULATIVE_ARGS *, enum machine_mode,
+ tree, bool);
/* The function cris_target_asm_function_epilogue puts the last insn to
output here. It always fits; there won't be a symbol operand. Used in
#undef TARGET_PROMOTE_FUNCTION_ARGS
#define TARGET_PROMOTE_FUNCTION_ARGS hook_bool_tree_true
-
#undef TARGET_STRUCT_VALUE_RTX
#define TARGET_STRUCT_VALUE_RTX cris_struct_value_rtx
-
#undef TARGET_SETUP_INCOMING_VARARGS
#define TARGET_SETUP_INCOMING_VARARGS cris_setup_incoming_varargs
+#undef TARGET_PASS_BY_REFERENCE
+#define TARGET_PASS_BY_REFERENCE cris_pass_by_reference
+#undef TARGET_ARG_PARTIAL_BYTES
+#define TARGET_ARG_PARTIAL_BYTES cris_arg_partial_bytes
struct gcc_target targetm = TARGET_INITIALIZER;
|| code == IOR || code == AND || code == UMIN));
}
-/* Check if MODE is same as mode for X, and X is PLUS or MINUS or UMIN. */
+/* Check if MODE is same as mode for X, and X is PLUS or MINUS or UMIN.
+ By the name, you might think we should include MULT. We don't because
+ it doesn't accept the same addressing modes as the others (ony
+ registers) and there's also the problem of handling TARGET_MUL_BUG. */
int
cris_operand_extend_operator (rtx x, enum machine_mode mode)
return cris_general_operand_or_symbol (xmem, GET_MODE (op));
}
-/* The CONDITIONAL_REGISTER_USAGE worker. */
+/* The CONDITIONAL_REGISTER_USAGE worker. */
void
cris_conditional_register_usage (void)
break;
case MULT:
- return "mul";
+ /* This function is for retrieving a part of an instruction name for
+ an operator, for immediate output. If that ever happens for
+ MULT, we need to apply TARGET_MUL_BUG in the caller. Make sure
+ we notice. */
+ abort ();
break;
case DIV:
return 0;
}
+/* This variable belongs to cris_target_asm_function_prologue but must
+ be located outside it for GTY reasons. */
+static GTY(()) unsigned long cfa_label_num = 0;
+
/* Textual function prologue. */
static void
int framesize;
int faked_args_size = 0;
int cfa_write_offset = 0;
- char *cfa_label = NULL;
+ static char cfa_label[30];
int return_address_on_stack
= regs_ever_live[CRIS_SRP_REGNUM]
|| cfun->machine->needs_return_address_on_stack != 0;
cfa_offset += cris_initial_frame_pointer_offset ();
}
- cfa_label = dwarf2out_cfi_label ();
+ ASM_GENERATE_INTERNAL_LABEL (cfa_label, "LCFIT",
+ cfa_label_num++);
dwarf2out_def_cfa (cfa_label, cfa_reg, cfa_offset);
cfa_write_offset = - faked_args_size - 4;
reg_names[PIC_OFFSET_TABLE_REGNUM],
reg_names[PIC_OFFSET_TABLE_REGNUM]);
+ if (doing_dwarf)
+ ASM_OUTPUT_LABEL (file, cfa_label);
+
if (TARGET_PDEBUG)
fprintf (file,
"; parm #%d @ %d; frame " HOST_WIDE_INT_PRINT_DEC
fputs ("\n\tnop", file);
return;
+ case '!':
+ /* Output directive for alignment padded with "nop" insns.
+ Optimizing for size, it's plain 4-byte alignment, otherwise we
+ align the section to a cache-line (32 bytes) and skip at max 2
+ bytes, i.e. we skip if it's the last insn on a cache-line. The
+ latter is faster by a small amount (for two test-programs 99.6%
+ and 99.9%) and larger by a small amount (ditto 100.1% and
+ 100.2%). This is supposed to be the simplest yet performance-
+ wise least intrusive way to make sure the immediately following
+ (supposed) muls/mulu insn isn't located at the end of a
+ cache-line. */
+ if (TARGET_MUL_BUG)
+ fputs (optimize_size
+ ? ".p2alignw 2,0x050f\n\t"
+ : ".p2alignw 5,0x050f,2\n\t", file);
+ return;
+
case 'H':
/* Print high (most significant) part of something. */
switch (GET_CODE (operand))
: NULL_RTX;
}
+/* Accessor used in cris.md:return because cfun->machine isn't available
+ there. */
+
+int
+cris_return_address_on_stack ()
+{
+ return cfun->machine->needs_return_address_on_stack;
+}
+
/* This used to be the INITIAL_FRAME_POINTER_OFFSET worker; now only
handles FP -> SP elimination offset. */
if (GET_CODE (exp) == SET)
{
if (cc_status.value1
- && cris_reg_overlap_mentioned_p (SET_DEST (exp),
- cc_status.value1))
+ && modified_in_p (cc_status.value1, insn))
cc_status.value1 = 0;
if (cc_status.value2
- && cris_reg_overlap_mentioned_p (SET_DEST (exp),
- cc_status.value2))
+ && modified_in_p (cc_status.value2, insn))
cc_status.value2 = 0;
}
return;
{
/* There's no CC0 change when clearing a register or
memory. Just check for overlap. */
- if ((cc_status.value1
- && cris_reg_overlap_mentioned_p (SET_DEST (exp),
- cc_status.value1)))
+ if (cc_status.value1
+ && modified_in_p (cc_status.value1, insn))
cc_status.value1 = 0;
- if ((cc_status.value2
- && cris_reg_overlap_mentioned_p (SET_DEST (exp),
- cc_status.value2)))
+ if (cc_status.value2
+ && modified_in_p (cc_status.value2, insn))
cc_status.value2 = 0;
return;
{
/* When SET to MEM, then CC is not changed (except for
overlap). */
- if ((cc_status.value1
- && cris_reg_overlap_mentioned_p (SET_DEST (exp),
- cc_status.value1)))
+ if (cc_status.value1
+ && modified_in_p (cc_status.value1, insn))
cc_status.value1 = 0;
- if ((cc_status.value2
- && cris_reg_overlap_mentioned_p (SET_DEST (exp),
- cc_status.value2)))
+ if (cc_status.value2
+ && modified_in_p (cc_status.value2, insn))
cc_status.value2 = 0;
return;
/* For "move.S rz,[rx=ry+o]" and "clear.S [rx=ry+o]",
say flags are not changed, except for overlap. */
if (cc_status.value1
- && cris_reg_overlap_mentioned_p (XEXP
- (XVECEXP
- (exp, 0, 0), 0),
- cc_status.value1))
- cc_status.value1 = 0;
-
- if (cc_status.value1
- && cris_reg_overlap_mentioned_p (XEXP
- (XVECEXP
- (exp, 0, 1), 0),
- cc_status.value1))
+ && modified_in_p (cc_status.value1, insn))
cc_status.value1 = 0;
if (cc_status.value2
- && cris_reg_overlap_mentioned_p (XEXP
- (XVECEXP
- (exp, 0, 0), 0),
- cc_status.value2))
- cc_status.value2 = 0;
-
- if (cc_status.value2
- && cris_reg_overlap_mentioned_p (XEXP
- (XVECEXP
- (exp, 0, 1), 0),
- cc_status.value2))
+ && modified_in_p (cc_status.value2, insn))
cc_status.value2 = 0;
return;
We just dispatch to the functions for ELF and a.out. */
void
-cris_target_asm_named_section (const char *name, unsigned int flags)
+cris_target_asm_named_section (const char *name, unsigned int flags,
+ tree decl)
{
if (! TARGET_ELF)
- default_no_named_section (name, flags);
+ default_no_named_section (name, flags, decl);
else
- default_elf_asm_named_section (name, flags);
+ default_elf_asm_named_section (name, flags, decl);
}
/* The LEGITIMATE_PIC_OPERAND_P worker. */
case CONST_INT:
case CONST_DOUBLE:
- case CONSTANT_P_RTX:
return 0;
default:
case CONST_INT:
case CONST_DOUBLE:
- case CONSTANT_P_RTX:
return 0;
default:
case CONST_INT:
case CONST_DOUBLE:
- case CONSTANT_P_RTX:
return 0;
default:
flag_no_function_cse = 1;
}
- if ((write_symbols == DWARF_DEBUG
- || write_symbols == DWARF2_DEBUG) && ! TARGET_ELF)
+ if (write_symbols == DWARF2_DEBUG && ! TARGET_ELF)
{
warning ("that particular -g option is invalid with -maout and -melinux");
write_symbols = DBX_DEBUG;
set_optab_libfunc (umod_optab, SImode, "__Umod");
}
-/* The EXPAND_BUILTIN_VA_ARG worker. This is modified from the
- "standard" implementation of va_arg: read the value from the current
- address and increment by the size of one or two registers. The
- important difference for CRIS is that if the type is
- pass-by-reference, then perform an indirection. */
-
-rtx
-cris_expand_builtin_va_arg (tree valist, tree type)
-{
- tree addr_tree, t;
- rtx addr;
- tree passed_size = size_zero_node;
- tree type_size = NULL;
- tree size3 = size_int (3);
- tree size4 = size_int (4);
- tree size8 = size_int (8);
- tree rounded_size;
-
- /* Get AP. */
- addr_tree = valist;
-
- if (type == error_mark_node
- || (type_size = TYPE_SIZE_UNIT (TYPE_MAIN_VARIANT (type))) == NULL
- || TREE_OVERFLOW (type_size))
- /* Presumably an error; the size isn't computable. A message has
- supposedly been emitted elsewhere. */
- rounded_size = size_zero_node;
- else
- rounded_size
- = fold (build (MULT_EXPR, sizetype,
- fold (build (TRUNC_DIV_EXPR, sizetype,
- fold (build (PLUS_EXPR, sizetype,
- type_size, size3)),
- size4)),
- size4));
-
- if (!integer_zerop (rounded_size))
- {
- /* Check if the type is passed by value or by reference. Values up
- to 8 bytes are passed by-value, padded to register-size (4
- bytes). Larger values and varying-size types are passed
- by reference. */
- passed_size
- = (!really_constant_p (type_size)
- ? size4
- : fold (build (COND_EXPR, sizetype,
- fold (build (GT_EXPR, sizetype,
- rounded_size,
- size8)),
- size4,
- rounded_size)));
-
- addr_tree
- = (!really_constant_p (type_size)
- ? build1 (INDIRECT_REF, build_pointer_type (type), addr_tree)
- : fold (build (COND_EXPR, TREE_TYPE (addr_tree),
- fold (build (GT_EXPR, sizetype,
- rounded_size,
- size8)),
- build1 (INDIRECT_REF, build_pointer_type (type),
- addr_tree),
- addr_tree)));
- }
-
- addr = expand_expr (addr_tree, NULL_RTX, Pmode, EXPAND_NORMAL);
- addr = copy_to_reg (addr);
-
- if (!integer_zerop (rounded_size))
- {
- /* Compute new value for AP. */
- t = build (MODIFY_EXPR, TREE_TYPE (valist), valist,
- build (PLUS_EXPR, TREE_TYPE (valist), valist,
- passed_size));
- TREE_SIDE_EFFECTS (t) = 1;
- expand_expr (t, const0_rtx, VOIDmode, EXPAND_NORMAL);
- }
-
- return addr;
-}
-
/* The INIT_EXPANDERS worker sets the per-function-data initializer and
mark functions. */
int reverse
= (refers_to_regno_p (dregno, dregno + 1, addr, NULL) != 0);
- /* The original code imples that we can't do
+ /* The original code implies that we can't do
move.x [rN+],rM move.x [rN],rM+1
when rN is dead, because of REG_NOTES damage. That is
consistent with what I've seen, so don't try it.
return val;
}
-/* This is in essence a copy of output_addr_const altered to output
- symbolic operands as PIC.
+/* Use from within code, from e.g. PRINT_OPERAND and
+ PRINT_OPERAND_ADDRESS. Macros used in output_addr_const need to emit
+ different things depending on whether code operand or constant is
+ emitted. */
- FIXME: Add hooks similar to ASM_OUTPUT_SYMBOL_REF to get this effect in
- the "real" output_addr_const. All we need is one for LABEL_REF (and
- one for CODE_LABEL?). */
-
-void
+static void
cris_output_addr_const (FILE *file, rtx x)
{
- int is_plt = 0;
-
-restart:
- switch (GET_CODE (x))
- {
- case UNSPEC:
- ASSERT_PLT_UNSPEC (x);
- x = XVECEXP (x, 0, 0);
- is_plt = 1;
-
- /* Fall through. */
- case SYMBOL_REF:
- if (flag_pic)
- {
- const char *origstr = XSTR (x, 0);
- const char *str;
+ in_code++;
+ output_addr_const (file, x);
+ in_code--;
+}
- str = (* targetm.strip_name_encoding) (origstr);
+/* Worker function for ASM_OUTPUT_SYMBOL_REF. */
- if (is_plt)
- {
- if (cris_pic_sympart_only)
- {
- assemble_name (file, str);
- fprintf (file, ":PLTG");
- }
- else
- {
- if (TARGET_AVOID_GOTPLT)
- /* We shouldn't get here. */
- abort ();
+void
+cris_asm_output_symbol_ref (FILE *file, rtx x)
+{
+ if (flag_pic && in_code > 0)
+ {
+ const char *origstr = XSTR (x, 0);
+ const char *str;
- fprintf (file, "[$%s+", reg_names [PIC_OFFSET_TABLE_REGNUM]);
- assemble_name (file, XSTR (x, 0));
+ str = (* targetm.strip_name_encoding) (origstr);
- if (flag_pic == 1)
- fprintf (file, ":GOTPLT16]");
- else
- fprintf (file, ":GOTPLT]");
- }
- }
- else if (cris_gotless_symbol (x))
- {
- if (! cris_pic_sympart_only)
- fprintf (file, "$%s+", reg_names [PIC_OFFSET_TABLE_REGNUM]);
- assemble_name (file, str);
- fprintf (file, ":GOTOFF");
- }
- else if (cris_got_symbol (x))
- {
- if (cris_pic_sympart_only)
- abort ();
- fprintf (file, "[$%s+", reg_names [PIC_OFFSET_TABLE_REGNUM]);
- assemble_name (file, XSTR (x, 0));
+ if (cris_gotless_symbol (x))
+ {
+ if (! cris_pic_sympart_only)
+ fprintf (file, "$%s+", reg_names [PIC_OFFSET_TABLE_REGNUM]);
+ assemble_name (file, str);
+ fprintf (file, ":GOTOFF");
+ }
+ else if (cris_got_symbol (x))
+ {
+ if (cris_pic_sympart_only)
+ abort ();
+ fprintf (file, "[$%s+", reg_names [PIC_OFFSET_TABLE_REGNUM]);
+ assemble_name (file, XSTR (x, 0));
- if (flag_pic == 1)
- fprintf (file, ":GOT16]");
- else
- fprintf (file, ":GOT]");
- }
+ if (flag_pic == 1)
+ fprintf (file, ":GOT16]");
else
- LOSE_AND_RETURN ("unexpected PIC symbol", x);
-
- /* Sanity check. */
- if (! current_function_uses_pic_offset_table)
- output_operand_lossage ("PIC register isn't set up");
+ fprintf (file, ":GOT]");
}
else
- assemble_name (file, XSTR (x, 0));
- break;
+ LOSE_AND_RETURN ("unexpected PIC symbol", x);
- case LABEL_REF:
- /* If we get one of those here, it should be dressed as PIC. Branch
- labels are normally output with the 'l' specifier, which means it
- will go directly to output_asm_label and not end up here. */
- if (GET_CODE (XEXP (x, 0)) != CODE_LABEL
- && (GET_CODE (XEXP (x, 0)) != NOTE
- || NOTE_LINE_NUMBER (XEXP (x, 0)) != NOTE_INSN_DELETED_LABEL))
- fatal_insn ("unexpected address expression", x);
+ /* Sanity check. */
+ if (! current_function_uses_pic_offset_table)
+ output_operand_lossage ("PIC register isn't set up");
+ }
+ else
+ assemble_name (file, XSTR (x, 0));
+}
- if (flag_pic)
- {
- if (cris_gotless_symbol (x))
- {
- if (! cris_pic_sympart_only)
- fprintf (file, "$%s+", reg_names [PIC_OFFSET_TABLE_REGNUM]);
- cris_output_addr_const (file, XEXP (x, 0));
+/* Worker function for ASM_OUTPUT_LABEL_REF. */
- fprintf (file, ":GOTOFF");
- }
- else
- /* Labels are never marked as global symbols. */
- fatal_insn ("unexpected PIC symbol", x);
+void
+cris_asm_output_label_ref (FILE *file, char *buf)
+{
+ if (flag_pic && in_code > 0)
+ {
+ if (! cris_pic_sympart_only)
+ fprintf (file, "$%s+", reg_names [PIC_OFFSET_TABLE_REGNUM]);
+ assemble_name (file, buf);
- /* Sanity check. */
- if (! current_function_uses_pic_offset_table)
- internal_error ("emitting PIC operand, but PIC register isn't set up");
- break;
- }
+ fprintf (file, ":GOTOFF");
- output_addr_const (file, x);
- break;
+ /* Sanity check. */
+ if (! current_function_uses_pic_offset_table)
+ internal_error ("emitting PIC operand, but PIC register isn't set up");
+ }
+ else
+ assemble_name (file, buf);
+}
- case NOTE:
- if (NOTE_LINE_NUMBER (x) != NOTE_INSN_DELETED_LABEL)
- fatal_insn ("unexpected NOTE as addr_const:", x);
- case CODE_LABEL:
- case CONST_INT:
- case CONST_DOUBLE:
- case ZERO_EXTEND:
- case SIGN_EXTEND:
- output_addr_const (file, x);
- break;
+/* Worker function for OUTPUT_ADDR_CONST_EXTRA. */
- case CONST:
- /* This used to output parentheses around the expression,
- but that does not work on the 386 (either ATT or BSD assembler). */
- cris_output_addr_const (file, XEXP (x, 0));
- break;
+bool
+cris_output_addr_const_extra (FILE *file, rtx x)
+{
+ switch (GET_CODE (x))
+ {
+ const char *origstr;
+ const char *str;
- case PLUS:
- /* Some assemblers need integer constants to appear last (eg masm). */
- if (GET_CODE (XEXP (x, 0)) == CONST_INT)
+ case UNSPEC:
+ ASSERT_PLT_UNSPEC (x);
+ x = XVECEXP (x, 0, 0);
+ origstr = XSTR (x, 0);
+ str = (* targetm.strip_name_encoding) (origstr);
+ if (cris_pic_sympart_only)
{
- cris_output_addr_const (file, XEXP (x, 1));
- if (INTVAL (XEXP (x, 0)) >= 0)
- fprintf (file, "+");
- output_addr_const (file, XEXP (x, 0));
+ assemble_name (file, str);
+ fprintf (file, ":PLTG");
}
else
{
- cris_output_addr_const (file, XEXP (x, 0));
- if (GET_CODE (XEXP (x, 1)) != CONST_INT
- || INTVAL (XEXP (x, 1)) >= 0)
- fprintf (file, "+");
- cris_output_addr_const (file, XEXP (x, 1));
- }
- break;
+ if (TARGET_AVOID_GOTPLT)
+ /* We shouldn't get here. */
+ abort ();
- case MINUS:
- /* Avoid outputting things like x-x or x+5-x,
- since some assemblers can't handle that. */
- x = simplify_subtraction (x);
- if (GET_CODE (x) != MINUS)
- goto restart;
-
- cris_output_addr_const (file, XEXP (x, 0));
- fprintf (file, "-");
- if ((GET_CODE (XEXP (x, 1)) == CONST_INT
- && INTVAL (XEXP (x, 1)) < 0)
- || GET_CODE (XEXP (x, 1)) != CONST_INT)
- {
- fprintf (file, "%s", targetm.asm_out.open_paren);
- cris_output_addr_const (file, XEXP (x, 1));
- fprintf (file, "%s", targetm.asm_out.close_paren);
+ fprintf (file, "[$%s+", reg_names [PIC_OFFSET_TABLE_REGNUM]);
+ assemble_name (file, XSTR (x, 0));
+
+ if (flag_pic == 1)
+ fprintf (file, ":GOTPLT16]");
+ else
+ fprintf (file, ":GOTPLT]");
}
- else
- output_addr_const (file, XEXP (x, 1));
- break;
+ return true;
default:
- LOSE_AND_RETURN ("unexpected address expression", x);
+ return false;
}
}
}
}
+/* Return true if TYPE must be passed by invisible reference.
+ For cris, we pass <= 8 bytes by value, others by reference. */
+
+static bool
+cris_pass_by_reference (CUMULATIVE_ARGS *ca ATTRIBUTE_UNUSED,
+ enum machine_mode mode, tree type,
+ bool named ATTRIBUTE_UNUSED)
+{
+ return (targetm.calls.must_pass_in_stack (mode, type)
+ || CRIS_FUNCTION_ARG_SIZE (mode, type) > 8);
+}
+
+
+static int
+cris_arg_partial_bytes (CUMULATIVE_ARGS *ca, enum machine_mode mode,
+ tree type, bool named ATTRIBUTE_UNUSED)
+{
+ if (ca->regs == CRIS_MAX_ARGS_IN_REGS - 1
+ && !targetm.calls.must_pass_in_stack (mode, type)
+ && CRIS_FUNCTION_ARG_SIZE (mode, type) > 4
+ && CRIS_FUNCTION_ARG_SIZE (mode, type) <= 8)
+ return UNITS_PER_WORD;
+ else
+ return 0;
+}
+
+
#if 0
/* Various small functions to replace macros. Only called from a
debugger. They might collide with gcc functions or system functions,
projects / gcc.git / blobdiff