Hello, The attached patch adds support for the bswap32 built-in on SH.
Tested with make -k -j8 check RUNTESTFLAGS="--target_board=sh-sim \{-m2/-ml,-m2/-mb,-m2a/-mb,-m2a-single/-mb,-m4/-ml, -m4/-mb,-m4-single/-ml,-m4-single/-mb,-m4a-single/-ml, -m4a-single/-mb}" and no new failures. Cheers, Oleg ChangeLog: PR target/53568 * config/sh/sh.md (bswapsi2): New expander. (swapbsi2): New insn.
Index: gcc/config/sh/sh.md =================================================================== --- gcc/config/sh/sh.md (revision 188425) +++ gcc/config/sh/sh.md (working copy) @@ -4529,6 +4529,38 @@ emit_label_after (skip_neg_label, emit_insn (gen_negc (high_dst, high_src))); DONE; }) + +(define_expand "bswapsi2" + [(set (match_operand:SI 0 "arith_reg_dest" "") + (bswap:SI (match_operand:SI 1 "arith_reg_operand" "")))] + "TARGET_SH1" +{ + if (! can_create_pseudo_p ()) + FAIL; + else + { + rtx tmp0 = gen_reg_rtx (SImode); + rtx tmp1 = gen_reg_rtx (SImode); + + emit_insn (gen_swapbsi2 (tmp0, operands[1])); + emit_insn (gen_rotlsi3_16 (tmp1, tmp0)); + emit_insn (gen_swapbsi2 (operands[0], tmp1)); + DONE; + } +}) + +(define_insn "swapbsi2" + [(set (match_operand:SI 0 "arith_reg_dest" "=r") + (ior:SI (and:SI (match_operand:SI 1 "arith_reg_operand" "r") + (const_int 4294901760)) + (ior:SI (and:SI (ashift:SI (match_dup 1) (const_int 8)) + (const_int 65280)) + (and:SI (ashiftrt:SI (match_dup 1) (const_int 8)) + (const_int 255)))))] + "TARGET_SH1" + "swap.b %1,%0" + [(set_attr "type" "arith")]) + ;; ------------------------------------------------------------------------- ;; Zero extension instructions