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Diffstat (limited to 'gcc/config/arm/arm.md')
| -rw-r--r-- | gcc/config/arm/arm.md | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/gcc/config/arm/arm.md b/gcc/config/arm/arm.md index 3cdc1535..79eff0e 100644 --- a/gcc/config/arm/arm.md +++ b/gcc/config/arm/arm.md @@ -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, |