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Commit 50c33087 by Michael Hayes Committed by Michael Hayes
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Convert all direct memory references to use LO_SUM and remove machdep hack that used to do this. 

Convert all direct memory references to use LO_SUM and remove machdep
hack that used to do this.
Sun Jan 24 21:24:43 1999  Michael Hayes  <m.hayes@elec.canterbury.ac.nz>
	* config/c4x/c4x.c (c4x_emit_move_sequence, c4x_encode_section_info):
	New functions.
	(c4x_check_legit_addr): Remove USE and PLUS, allow
	LO_SUM, and disable SYMBOL_REF, LABEL_REF, and CONST cases.
	(c4x_legitimize_address): Penalise SYMBOL_REF, LABEL_REF, and
	CONST cases.  Add LO_SUM.
	(c4x_print_operand): Modified 'C' and 'R' cases for calls.
	Added 'U' case.  Remove dependence on SYMBOL_REF_FLAG.
	(c4x_print_operand_address): Handle LO_SUM.
	(c4x_scan_for_ldp): Delete.  Hooray!
	(c4x_process_after_reload): Remove call to c4x_scan_for_ldp.
	Split all insns.
	(c4x_immed_int_constant): Renamed from c4x_int_constant.  All callers
	changed.
	(c4x_immed_float_constant): Renamed from c4x_float_constant.  All
 	callers	changed.
	(c4x_T_constraint): Allow LO_SUM, disable SYMBOL_REF, LABEL_REF,
	and CONST.
	(c4x_U_constraint, symbolic_operand): New functions.
	(src_operand): Allow 'I' constants in HImode.  Allow LO_SUM,
	disable SYMBOL_REF, LABEL_REF, and CONST.
	(lsrc_operand, tsrc_operand): Call src_operand instead of
	general_operand.
	(c4x_operand_subword): Update comments.
	* config/c4x/c4x.c (TARGET_LOAD_ADDRESS): New macro.
	(LEGITIMATE_CONSTANT_P): Allow SYMBOL_REF, LABEL_REF, CONST,
	plus HIGH and LO_SUM for the C40.
	(ENCODE_SECTION_INFO): Define macro.
	(symbolic_operand, c4x_U_constraint, c4x_emit_move_sequence): New
	prototypes.
	(PREDICATE_CODES): Add symbolic_operand.
	* config/c4x/c4x.md (movqi, movgqf, movhi, movhi): Call
	c4x_emit_move_sequence.
	(floatunsqiqf2, fixuns_truncqfqi2): Rework emitted RTL
	to avoid symbol references.
	(all patterns with g constraint): Replace 'g' constraint with 'rIm'.
	(set_high): Renamed from set_high_use.
	(set_lo_sum): Renamed from set_ior_lo_use.
	(all call patterns): Make MEM explicit in call address operands.
	Modified output templates to use 'U' modifier.

From-SVN: r24842
parent 4c1d5c87
Showing with 99 additions and 17 deletions
gcc/ChangeLog
Sun Jan 24 21:24:43 1999 Michael Hayes <m.hayes@elec.canterbury.ac.nz>
* config/c4x/c4x.c (c4x_emit_move_sequence, c4x_encode_section_info):
New functions.
(c4x_check_legit_addr): Remove USE and PLUS, allow
LO_SUM, and disable SYMBOL_REF, LABEL_REF, and CONST cases.
(c4x_legitimize_address): Penalise SYMBOL_REF, LABEL_REF, and
CONST cases. Add LO_SUM.
(c4x_print_operand): Modified 'C' and 'R' cases for calls.
Added 'U' case. Remove dependence on SYMBOL_REF_FLAG.
(c4x_print_operand_address): Handle LO_SUM.
(c4x_scan_for_ldp): Delete. Hooray!
(c4x_process_after_reload): Remove call to c4x_scan_for_ldp.
Split all insns.
(c4x_immed_int_constant): Renamed from c4x_int_constant. All callers
changed.
(c4x_immed_float_constant): Renamed from c4x_float_constant. All
callers changed.
(c4x_T_constraint): Allow LO_SUM, disable SYMBOL_REF, LABEL_REF,
and CONST.
(c4x_U_constraint, symbolic_operand): New functions.
(src_operand): Allow 'I' constants in HImode. Allow LO_SUM,
disable SYMBOL_REF, LABEL_REF, and CONST.
(lsrc_operand, tsrc_operand): Call src_operand instead of
general_operand.
(c4x_operand_subword): Update comments.
* config/c4x/c4x.c (TARGET_LOAD_ADDRESS): New macro.
(LEGITIMATE_CONSTANT_P): Allow SYMBOL_REF, LABEL_REF, CONST,
plus HIGH and LO_SUM for the C40.
(ENCODE_SECTION_INFO): Define macro.
(symbolic_operand, c4x_U_constraint, c4x_emit_move_sequence): New
prototypes.
(PREDICATE_CODES): Add symbolic_operand.
* config/c4x/c4x.md (movqi, movgqf, movhi, movhi): Call
c4x_emit_move_sequence.
(floatunsqiqf2, fixuns_truncqfqi2): Rework emitted RTL
to avoid symbol references.
(all patterns with g constraint): Replace 'g' constraint with 'rIm'.
(set_high): Renamed from set_high_use.
(set_lo_sum): Renamed from set_ior_lo_use.
(all call patterns): Make MEM explicit in call address operands.
Modified output templates to use 'U' modifier.
Sun Jan 24 01:15:05 PST 1999 Jeff Law (law@cygnus.com)
* version.c: Bump for snapshot.
......
gcc/config/c4x/c4x.h
......@@ -258,12 +258,16 @@ extern int target_flags;
#define TARGET_C40 (target_flags & C40_FLAG)
#define TARGET_C44 (target_flags & C44_FLAG)
#define TARGET_LOAD_ADDRESS (1 || (! TARGET_C3X && ! TARGET_SMALL))
/* -mrpts allows the use of the RPTS instruction irregardless.
-mrpts=max-cycles will use RPTS if the number of cycles is constant
and less than max-cycles. */
#define TARGET_RPTS_CYCLES(CYCLES) (TARGET_RPTS || (CYCLES) < c4x_rpts_cycles)
#define BCT_CHECK_LOOP_ITERATIONS !(TARGET_LOOP_UNSIGNED)
/* -mcpu=XX with XX = target DSP version number */
/* This macro is similar to `TARGET_SWITCHES' but defines names of
......@@ -836,16 +840,17 @@ c4x_secondary_memory_needed(CLASS1, CLASS2, MODE)
: ((C) == 'O') ? (IS_HIGH_CONST (VAL)) \
: 0 )
#define CONST_DOUBLE_OK_FOR_LETTER_P(VAL, C) \
( ((C) == 'G') ? (fp_zero_operand (VAL)) \
: ((C) == 'H') ? (c4x_H_constant (VAL)) \
#define CONST_DOUBLE_OK_FOR_LETTER_P(OP, C) \
( ((C) == 'G') ? (fp_zero_operand (OP)) \
: ((C) == 'H') ? (c4x_H_constant (OP)) \
: 0 )
#define EXTRA_CONSTRAINT(VAL, C) \
( ((C) == 'Q') ? (c4x_Q_constraint (VAL)) \
: ((C) == 'R') ? (c4x_R_constraint (VAL)) \
: ((C) == 'S') ? (c4x_S_constraint (VAL)) \
: ((C) == 'T') ? (c4x_T_constraint (VAL)) \
#define EXTRA_CONSTRAINT(OP, C) \
( ((C) == 'Q') ? (c4x_Q_constraint (OP)) \
: ((C) == 'R') ? (c4x_R_constraint (OP)) \
: ((C) == 'S') ? (c4x_S_constraint (OP)) \
: ((C) == 'T') ? (c4x_T_constraint (OP)) \
: ((C) == 'U') ? (c4x_U_constraint (OP)) \
: 0 )
#define SMALL_CONST(VAL, insn) \
......@@ -1613,17 +1618,44 @@ extern struct rtx_def *c4x_legitimize_address ();
/* Nonzero if the constant value X is a legitimate general operand.
It is given that X satisfies CONSTANT_P or is a CONST_DOUBLE.
The C4x can only load 16-bit immediate values, so we only allow
a restricted subset of CONST_INT and CONST_DOUBLE and reject
LABEL_REF, SYMBOL_REF, CONST, and HIGH codes. */
The C4x can only load 16-bit immediate values, so we only allow a
restricted subset of CONST_INT and CONST_DOUBLE. Disallow
LABEL_REF and SYMBOL_REF (except on the C40 with the big memory
model) so that the symbols will be forced into the constant pool.
On second thoughts, lets do this with the move expanders.
*/
#define LEGITIMATE_CONSTANT_P(X) \
((GET_CODE (X) == CONST_DOUBLE && c4x_H_constant (X)) \
|| (GET_CODE (X) == CONST_INT && c4x_I_constant (X)))
|| (GET_CODE (X) == CONST_INT && c4x_I_constant (X)) \
|| (GET_CODE (X) == SYMBOL_REF) \
|| (GET_CODE (X) == LABEL_REF) \
|| (GET_CODE (X) == CONST) \
|| (GET_CODE (X) == HIGH && ! TARGET_C3X) \
|| (GET_CODE (X) == LO_SUM && ! TARGET_C3X))
#define LEGITIMATE_DISPLACEMENT_P(X) IS_DISP8_CONST (INTVAL (X))
/* Define this macro if references to a symbol must be treated
differently depending on something about the variable or
function named by the symbol (such as what section it is in).
The macro definition, if any, is executed immediately after the
rtl for DECL or other node is created.
The value of the rtl will be a `mem' whose address is a
`symbol_ref'.
The usual thing for this macro to do is to a flag in the
`symbol_ref' (such as `SYMBOL_REF_FLAG') or to store a modified
name string in the `symbol_ref' (if one bit is not enough
information).
On the C4x we use this to indicate if a symbol is in text or
data space. */
extern void c4x_encode_section_info ();
#define ENCODE_SECTION_INFO(DECL) c4x_encode_section_info (DECL);
/* Descripting Relative Cost of Operations */
/* Provide the costs of a rtl expression. This is in the body of a
......@@ -1912,7 +1944,7 @@ dtors_section () \
|| ! TREE_READONLY (DECL) || TREE_SIDE_EFFECTS (DECL) \
|| ! DECL_INITIAL (DECL) \
|| (DECL_INITIAL (DECL) != error_mark_node \
&& ! TREE_CONSTANT (DECL_INITIAL (DECL)))) \
&& ! TREE_CONSTANT (DECL_INITIAL (DECL)))) \
data_section (); \
else \
const_section (); \
......@@ -2440,8 +2472,6 @@ do { fprintf (asm_out_file, "\t.sdef\t"); \
#define MACHINE_DEPENDENT_REORG(INSNS) c4x_process_after_reload(INSNS)
#define MACHINE_DEPENDENT_COMBINE(INSNS) c4x_combine_parallel(INSNS)
#define DBR_OUTPUT_SEQEND(FILE) \
if (final_sequence != NULL_RTX) \
{ \
......@@ -2492,7 +2522,8 @@ if (final_sequence != NULL_RTX) \
{"any_operand", {SUBREG, REG, MEM, CONST_INT, CONST_DOUBLE}}, \
{"par_ind_operand", {MEM}}, \
{"parallel_operand", {SUBREG, REG, MEM}}, \
{"mem_operand", {MEM}}, \
{"symbolic_operand", {SYMBOL_REF, LABEL_REF, CONST}}, \
{"mem_operand", {MEM}},
/* Variables in c4x.c */
......@@ -2582,6 +2613,8 @@ extern int rc_reg_operand ();
extern int st_reg_operand ();
extern int symbolic_operand ();
extern int ar0_reg_operand ();
extern int ar0_mem_operand ();
......@@ -2652,12 +2685,16 @@ extern int c4x_S_constraint ();
extern int c4x_T_constraint ();
extern int c4x_U_constraint ();
extern void c4x_emit_libcall ();
extern void c4x_emit_libcall3 ();
extern void c4x_emit_libcall_mulhi ();
extern int c4x_emit_move_sequence ();
extern int legitimize_operands ();
extern int valid_operands ();
......
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