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| -rw-r--r-- | gcc/ChangeLog | 4 | ||||
| -rw-r--r-- | gcc/config/h8300/h8300.md | 17 |
2 files changed, 21 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 8b81f7e..5d6ece2 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,5 +1,9 @@ 2003-03-03 Kazu Hirata <kazu@cs.umass.edu> + * config/h8300/h8300.md (a peephole2): New. + +2003-03-03 Kazu Hirata <kazu@cs.umass.edu> + * config/h8300/h8300.md (*extzv_8_8): Use shorter code when operands[0] and operands[1] are different. diff --git a/gcc/config/h8300/h8300.md b/gcc/config/h8300/h8300.md index 28cb87e..1c031b9 100644 --- a/gcc/config/h8300/h8300.md +++ b/gcc/config/h8300/h8300.md @@ -3561,6 +3561,23 @@ ? gen_rtx_GE (VOIDmode, cc0_rtx, const0_rtx) : gen_rtx_LT (VOIDmode, cc0_rtx, const0_rtx));") +(define_peephole2 + [(set (match_operand:SI 0 "register_operand" "") + (match_operand:SI 1 "register_operand" "")) + (set (match_dup 0) + (and:SI (match_dup 0) + (const_int 255)))] + "(TARGET_H8300H || TARGET_H8300S) + && REG_P (operands[0]) + && REG_P (operands[1]) + && REGNO (operands[0]) != REGNO (operands[1])" + [(set (match_dup 0) + (const_int 0)) + (set (strict_low_part (match_dup 2)) + (match_dup 3))] + "operands[2] = gen_rtx_REG (QImode, REGNO (operands[0])); + operands[3] = gen_rtx_REG (QImode, REGNO (operands[1]));") + ;; (compare (reg:SI) (const_int)) takes 6 bytes, so we try to achieve ;; the equivalent with shorter sequences. Here is the summary. Cases ;; are grouped for each define_peephole2. |