diff options
Diffstat (limited to 'gcc/config/mips/mips.md')
| -rw-r--r-- | gcc/config/mips/mips.md | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/gcc/config/mips/mips.md b/gcc/config/mips/mips.md index b0ceff8..af8f709 100644 --- a/gcc/config/mips/mips.md +++ b/gcc/config/mips/mips.md @@ -2332,6 +2332,31 @@ (set_attr "mode" "DI") (set_attr "length" "8,*")]) +;; Combine is not allowed to convert this insn into a zero_extendsidi2 +;; because of TRULY_NOOP_TRUNCATION. + +(define_insn_and_split "*clear_upper32" + [(set (match_operand:DI 0 "register_operand" "=d,d") + (and:DI (match_operand:DI 1 "nonimmediate_operand" "d,o") + (const_int 4294967295)))] + "TARGET_64BIT" +{ + if (which_alternative == 0) + return "#"; + + operands[1] = gen_lowpart (SImode, operands[1]); + return "lwu\t%0,%1"; +} + "&& reload_completed && REG_P (operands[1])" + [(set (match_dup 0) + (ashift:DI (match_dup 1) (const_int 32))) + (set (match_dup 0) + (lshiftrt:DI (match_dup 0) (const_int 32)))] + "" + [(set_attr "type" "multi,load") + (set_attr "mode" "DI") + (set_attr "length" "8,*")]) + (define_expand "zero_extend<SHORT:mode><GPR:mode>2" [(set (match_operand:GPR 0 "register_operand") (zero_extend:GPR (match_operand:SHORT 1 "nonimmediate_operand")))] |