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constraints.md (Pe): New constraint.

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2012-04-13  Joey Ye  <joey.ye@arm.com>

	* config/arm/constraints.md (Pe): New constraint.
	* config/arm/arm.md: New split for imm 256-510.

testsuite:

	* gcc.target/arm/thumb1-imm.c: New testcase.

From-SVN: r186406
This commit is contained in:
Joey Ye 2012-04-13 08:05:39 +00:00 committed by Joey Ye
parent 50f7512489
commit 572a49c87c
5 changed files with 40 additions and 1 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2012-04-13 Joey Ye <joey.ye@arm.com>
* config/arm/constraints.md (Pe): New constraint.
* config/arm/arm.md: New split for imm 256-510.
2012-04-13 Terry Guo <terry.guo@arm.com>
* config/arm/arm-cores.def: Added core cortex-m0plus.

15
gcc/config/arm/arm.md
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@ -5652,6 +5652,21 @@
}"
)
;; For thumb1 split imm move [256-510] into mov [1-255] and add #255
(define_split
[(set (match_operand:SI 0 "register_operand" "")
(match_operand:SI 1 "const_int_operand" ""))]
"TARGET_THUMB1 && satisfies_constraint_Pe (operands[1])"
[(set (match_dup 2) (match_dup 1))
(set (match_dup 0) (plus:SI (match_dup 2) (match_dup 3)))]
"
{
operands[1] = GEN_INT (INTVAL (operands[1]) - 255);
operands[2] = can_create_pseudo_p () ? gen_reg_rtx (SImode) : operands[0];
operands[3] = GEN_INT (255);
}"
)
;; When generating pic, we need to load the symbol offset into a register.
;; So that the optimizer does not confuse this with a normal symbol load
;; we use an unspec. The offset will be loaded from a constant pool entry,

7
gcc/config/arm/constraints.md
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@ -30,7 +30,7 @@
;; The following multi-letter normal constraints have been used:
;; in ARM/Thumb-2 state: Da, Db, Dc, Dn, Dl, DL, Dv, Dy, Di, Dt, Dz
;; in Thumb-1 state: Pa, Pb, Pc, Pd
;; in Thumb-1 state: Pa, Pb, Pc, Pd, Pe
;; in Thumb-2 state: Pj, PJ, Ps, Pt, Pu, Pv, Pw, Px, Py
;; The following memory constraints have been used:
@ -172,6 +172,11 @@
(and (match_code "const_int")
(match_test "TARGET_THUMB1 && ival >= 0 && ival <= 7")))
(define_constraint "Pe"
"@internal In Thumb-1 state a constant in the range 256 to +510"
(and (match_code "const_int")
(match_test "TARGET_THUMB1 && ival >= 256 && ival <= 510")))
(define_constraint "Ps"
"@internal In Thumb-2 state a constant in the range -255 to +255"
(and (match_code "const_int")

4
gcc/testsuite/ChangeLog
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@ -1,3 +1,7 @@
2012-04-13 Joey Ye <joey.ye@arm.com>
* gcc.target/arm/thumb1-imm.c: New testcase.
2012-04-12 Uros Bizjak <ubizjak@gmail.com>
PR target/52932

10
gcc/testsuite/gcc.target/arm/thumb1-imm.c Normal file
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@ -0,0 +1,10 @@
/* Check for thumb1 imm [255-510] moves. */
/* { dg-require-effective-target arm_thumb1_ok } */
int f()
{
return 257;
}
/* { dg-final { scan-assembler-not "ldr" } } */