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| author | Christian Bruel <christian.bruel@st.com> | 2014-04-14 10:31:34 +0200 |
|---|---|---|
| committer | Christian Bruel <chrbr@gcc.gnu.org> | 2014-04-14 10:31:34 +0200 |
| commit | 9447df74c059415f2c53df95d845ab9964793074 (patch) | |
| tree | e54a57f2c51644b57bc64cfabda1782fad7b36ea /gcc/config/sh/sh-mem.cc | |
| parent | fa1aecc1c218eca8a1b5643e9276bffe485f6e67 (diff) | |
| download | gcc-9447df74c059415f2c53df95d845ab9964793074.zip gcc-9447df74c059415f2c53df95d845ab9964793074.tar.gz gcc-9447df74c059415f2c53df95d845ab9964793074.tar.bz2 | |
sh-mem.cc (sh_expand_strlen): Unroll last word.
2014-04-14 Christian Bruel <christian.bruel@st.com>
* config/sh/sh-mem.cc (sh_expand_strlen): Unroll last word.
From-SVN: r209358
Diffstat (limited to 'gcc/config/sh/sh-mem.cc')
| -rw-r--r-- | gcc/config/sh/sh-mem.cc | 32 |
1 files changed, 29 insertions, 3 deletions
diff --git a/gcc/config/sh/sh-mem.cc b/gcc/config/sh/sh-mem.cc index d499b3b..1b84f9b 100644 --- a/gcc/config/sh/sh-mem.cc +++ b/gcc/config/sh/sh-mem.cc @@ -586,9 +586,35 @@ sh_expand_strlen (rtx *operands) emit_move_insn (current_addr, plus_constant (Pmode, current_addr, -4)); - /* start byte loop. */ addr1 = adjust_address (addr1, QImode, 0); + /* unroll remaining bytes. */ + emit_insn (gen_extendqisi2 (tmp1, addr1)); + emit_insn (gen_cmpeqsi_t (tmp1, const0_rtx)); + jump = emit_jump_insn (gen_branch_true (L_return)); + add_int_reg_note (jump, REG_BR_PROB, prob_likely); + + emit_move_insn (current_addr, plus_constant (Pmode, current_addr, 1)); + + emit_insn (gen_extendqisi2 (tmp1, addr1)); + emit_insn (gen_cmpeqsi_t (tmp1, const0_rtx)); + jump = emit_jump_insn (gen_branch_true (L_return)); + add_int_reg_note (jump, REG_BR_PROB, prob_likely); + + emit_move_insn (current_addr, plus_constant (Pmode, current_addr, 1)); + + emit_insn (gen_extendqisi2 (tmp1, addr1)); + emit_insn (gen_cmpeqsi_t (tmp1, const0_rtx)); + jump = emit_jump_insn (gen_branch_true (L_return)); + add_int_reg_note (jump, REG_BR_PROB, prob_likely); + + emit_move_insn (current_addr, plus_constant (Pmode, current_addr, 1)); + + emit_insn (gen_extendqisi2 (tmp1, addr1)); + jump = emit_jump_insn (gen_jump_compact (L_return)); + emit_barrier_after (jump); + + /* start byte loop. */ emit_label (L_loop_byte); emit_insn (gen_extendqisi2 (tmp1, addr1)); @@ -600,10 +626,10 @@ sh_expand_strlen (rtx *operands) /* end loop. */ - emit_label (L_return); - emit_insn (gen_addsi3 (start_addr, start_addr, GEN_INT (1))); + emit_label (L_return); + emit_insn (gen_subsi3 (operands[0], current_addr, start_addr)); return true; |