diff options
Diffstat (limited to 'gcc/config/cris/cris.md')
| -rw-r--r-- | gcc/config/cris/cris.md | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/gcc/config/cris/cris.md b/gcc/config/cris/cris.md index 7690d7f..0b42197 100644 --- a/gcc/config/cris/cris.md +++ b/gcc/config/cris/cris.md @@ -178,6 +178,7 @@ (define_code_attr shlr [(ashiftrt "ashr") (lshiftrt "lshr") (ashift "ashl")]) (define_code_attr slr [(ashiftrt "asr") (lshiftrt "lsr") (ashift "lsl")]) +(define_code_iterator zcond [eq ne]) (define_code_iterator ncond [eq ne gtu ltu geu leu]) (define_code_iterator ocond [gt le]) (define_code_iterator rcond [lt ge]) @@ -1934,6 +1935,32 @@ (pc)))] "") +;; FIXME: this matches only a subset of what the "*btst" pattern can handle. +(define_insn_and_split "*cbranch<mode>4_btstq<CC>" + [(set (pc) + (if_then_else + (zcond + (zero_extract:BWD + (match_operand:BWD 0 "register_operand" "r") + (match_operand 1 "const_int_operand" "Kc") + (const_int 0)) + (const_int 0)) + (label_ref (match_operand 2 "")) + (pc))) + (clobber (reg:CC CRIS_CC0_REGNUM))] + "" + "#" + "&& reload_completed" + [(set (reg:CC CRIS_CC0_REGNUM) + (compare:CC + (zero_extract:SI (match_dup 0) (match_dup 1) (const_int 0)) + (const_int 0))) + (set (pc) + (if_then_else (zcond (reg:CC CRIS_CC0_REGNUM) (const_int 0)) + (label_ref (match_dup 3)) + (pc)))] + "") + ;; We suffer from the same overflow-bit-gets-in-the-way problem as ;; e.g. m68k, so we have to check if overflow bit is set on all "signed" |