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[AArch64][2/2] Add constrain to address offset in storewb_pair/loadwb_pair insns

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Add a pridicate to check whether the const offset is valid.
For 32-bit variant: -256 <= offset <= 252
For 64-bit variant: -512 <= offset <= 504

2014-07-29  Renlin Li  <renlin.li@arm.com>
2014-07-29  Jiong Wang  <jiong.wang@arm.com>

gcc/
  * config/aarch64/aarch64.c (offset_7bit_signed_scaled_p): Rename to
  aarch64_offset_7bit_signed_scaled_p, remove static and use it.
  * config/aarch64/aarch64-protos.h (aarch64_offset_7bit_signed_scaled_p):
  Declaration.
  * config/aarch64/predicates.md (aarch64_mem_pair_offset): Define new
  predicate.
  * config/aarch64/aarch64.md (loadwb_pair, storewb_pair): Use
  aarch64_mem_pair_offset.

From-SVN: r213487
This commit is contained in:
Jiong Wang 2014-08-01 15:09:05 +00:00
parent e244d1e6cc
commit 4470747882
5 changed files with 27 additions and 10 deletions
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12
gcc/ChangeLog
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@ -1,3 +1,15 @@
2014-08-01 Renlin Li <renlin.li@arm.com>
2014-08-01 Jiong Wang <jiong.wang@arm.com>
* config/aarch64/aarch64.c (offset_7bit_signed_scaled_p): Rename to
aarch64_offset_7bit_signed_scaled_p, remove static and use it.
* config/aarch64/aarch64-protos.h (aarch64_offset_7bit_signed_scaled_p):
Declaration.
* config/aarch64/predicates.md (aarch64_mem_pair_offset): Define new
predicate.
* config/aarch64/aarch64.md (loadwb_pair, storewb_pair): Use
aarch64_mem_pair_offset.
2014-08-01 Jiong Wang <jiong.wang@arm.com>
* config/aarch64/aarch64.md (loadwb_pair<GPI:mode>_<P:mode>): Fix

1
gcc/config/aarch64/aarch64-protos.h
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@ -194,6 +194,7 @@ bool aarch64_modes_tieable_p (enum machine_mode mode1,
bool aarch64_move_imm (HOST_WIDE_INT, enum machine_mode);
bool aarch64_mov_operand_p (rtx, enum aarch64_symbol_context,
enum machine_mode);
bool aarch64_offset_7bit_signed_scaled_p (enum machine_mode, HOST_WIDE_INT);
char *aarch64_output_scalar_simd_mov_immediate (rtx, enum machine_mode);
char *aarch64_output_simd_mov_immediate (rtx, enum machine_mode, unsigned);
bool aarch64_pad_arg_upward (enum machine_mode, const_tree);

12
gcc/config/aarch64/aarch64.c
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@ -3193,8 +3193,8 @@ aarch64_classify_index (struct aarch64_address_info *info, rtx x,
return false;
}
static inline bool
offset_7bit_signed_scaled_p (enum machine_mode mode, HOST_WIDE_INT offset)
bool
aarch64_offset_7bit_signed_scaled_p (enum machine_mode mode, HOST_WIDE_INT offset)
{
return (offset >= -64 * GET_MODE_SIZE (mode)
&& offset < 64 * GET_MODE_SIZE (mode)
@ -3266,12 +3266,12 @@ aarch64_classify_address (struct aarch64_address_info *info,
We conservatively require an offset representable in either mode.
*/
if (mode == TImode || mode == TFmode)
return (offset_7bit_signed_scaled_p (mode, offset)
return (aarch64_offset_7bit_signed_scaled_p (mode, offset)
&& offset_9bit_signed_unscaled_p (mode, offset));
if (outer_code == PARALLEL)
return ((GET_MODE_SIZE (mode) == 4 || GET_MODE_SIZE (mode) == 8)
&& offset_7bit_signed_scaled_p (mode, offset));
&& aarch64_offset_7bit_signed_scaled_p (mode, offset));
else
return (offset_9bit_signed_unscaled_p (mode, offset)
|| offset_12bit_unsigned_scaled_p (mode, offset));
@ -3326,12 +3326,12 @@ aarch64_classify_address (struct aarch64_address_info *info,
We conservatively require an offset representable in either mode.
*/
if (mode == TImode || mode == TFmode)
return (offset_7bit_signed_scaled_p (mode, offset)
return (aarch64_offset_7bit_signed_scaled_p (mode, offset)
&& offset_9bit_signed_unscaled_p (mode, offset));
if (outer_code == PARALLEL)
return ((GET_MODE_SIZE (mode) == 4 || GET_MODE_SIZE (mode) == 8)
&& offset_7bit_signed_scaled_p (mode, offset));
&& aarch64_offset_7bit_signed_scaled_p (mode, offset));
else
return offset_9bit_signed_unscaled_p (mode, offset);
}

8
gcc/config/aarch64/aarch64.md
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@ -1022,7 +1022,7 @@
[(parallel
[(set (match_operand:P 0 "register_operand" "=k")
(plus:P (match_operand:P 1 "register_operand" "0")
(match_operand:P 4 "const_int_operand" "n")))
(match_operand:P 4 "aarch64_mem_pair_offset" "n")))
(set (match_operand:GPI 2 "register_operand" "=r")
(mem:GPI (match_dup 1)))
(set (match_operand:GPI 3 "register_operand" "=r")
@ -1037,7 +1037,7 @@
[(parallel
[(set (match_operand:P 0 "register_operand" "=k")
(plus:P (match_operand:P 1 "register_operand" "0")
(match_operand:P 4 "const_int_operand" "n")))
(match_operand:P 4 "aarch64_mem_pair_offset" "n")))
(set (match_operand:GPF 2 "register_operand" "=w")
(mem:GPF (match_dup 1)))
(set (match_operand:GPF 3 "register_operand" "=w")
@ -1054,7 +1054,7 @@
[(parallel
[(set (match_operand:P 0 "register_operand" "=&k")
(plus:P (match_operand:P 1 "register_operand" "0")
(match_operand:P 4 "const_int_operand" "n")))
(match_operand:P 4 "aarch64_mem_pair_offset" "n")))
(set (mem:GPI (plus:P (match_dup 0)
(match_dup 4)))
(match_operand:GPI 2 "register_operand" "r"))
@ -1070,7 +1070,7 @@
[(parallel
[(set (match_operand:P 0 "register_operand" "=&k")
(plus:P (match_operand:P 1 "register_operand" "0")
(match_operand:P 4 "const_int_operand" "n")))
(match_operand:P 4 "aarch64_mem_pair_offset" "n")))
(set (mem:GPF (plus:P (match_dup 0)
(match_dup 4)))
(match_operand:GPF 2 "register_operand" "w"))

4
gcc/config/aarch64/predicates.md
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@ -123,6 +123,10 @@
(match_test "INTVAL (op) != 0
&& (unsigned) exact_log2 (INTVAL (op)) < 64")))
(define_predicate "aarch64_mem_pair_offset"
(and (match_code "const_int")
(match_test "aarch64_offset_7bit_signed_scaled_p (mode, INTVAL (op))")))
(define_predicate "aarch64_mem_pair_operand"
(and (match_code "mem")
(match_test "aarch64_legitimate_address_p (mode, XEXP (op, 0), PARALLEL,