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[SH] PR 53568 - Add support for bswap built-ins
- From: Oleg Endo <oleg dot endo at t-online dot de>
- To: gcc-patches <gcc-patches at gcc dot gnu dot org>
- Date: Wed, 13 Jun 2012 09:48:22 +0200
- Subject: [SH] PR 53568 - Add support for bswap built-ins
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