diff options
Diffstat (limited to 'gcc-4.9/gcc/config/sh/sh-mem.cc')
| -rw-r--r-- | gcc-4.9/gcc/config/sh/sh-mem.cc | 24 |
1 files changed, 16 insertions, 8 deletions
diff --git a/gcc-4.9/gcc/config/sh/sh-mem.cc b/gcc-4.9/gcc/config/sh/sh-mem.cc index 45af23acb..e5ef165cf 100644 --- a/gcc-4.9/gcc/config/sh/sh-mem.cc +++ b/gcc-4.9/gcc/config/sh/sh-mem.cc @@ -1,5 +1,5 @@ /* Helper routines for memory move and comparison insns. - Copyright (C) 2013-2014 Free Software Foundation, Inc. + Copyright (C) 2013-2015 Free Software Foundation, Inc. This file is part of GCC. @@ -226,7 +226,7 @@ sh_expand_cmpstr (rtx *operands) emit_move_insn (tmp3, addr2); emit_move_insn (s2_addr, plus_constant (Pmode, s2_addr, 4)); - /*start long loop. */ + /* start long loop. */ emit_label (L_loop_long); emit_move_insn (tmp2, tmp3); @@ -335,7 +335,7 @@ sh_expand_cmpnstr (rtx *operands) rtx len = force_reg (SImode, operands[3]); int constp = CONST_INT_P (operands[3]); - /* Loop on a register count. */ + /* Loop on a register count. */ if (constp) { rtx tmp0 = gen_reg_rtx (SImode); @@ -364,7 +364,7 @@ sh_expand_cmpnstr (rtx *operands) add_int_reg_note (jump, REG_BR_PROB, prob_likely); } - /* word count. Do we have iterations ? */ + /* word count. Do we have iterations ? */ emit_insn (gen_lshrsi3 (lenw, len, GEN_INT (2))); /*start long loop. */ @@ -407,6 +407,7 @@ sh_expand_cmpnstr (rtx *operands) /* end loop. Reached max iterations. */ if (! sbytes) { + emit_insn (gen_subsi3 (operands[0], tmp1, tmp2)); jump = emit_jump_insn (gen_jump_compact (L_return)); emit_barrier_after (jump); } @@ -482,6 +483,13 @@ sh_expand_cmpnstr (rtx *operands) jump = emit_jump_insn (gen_jump_compact( L_end_loop_byte)); emit_barrier_after (jump); } + else + { + emit_insn (gen_cmpeqsi_t (len, const0_rtx)); + emit_move_insn (operands[0], const0_rtx); + jump = emit_jump_insn (gen_branch_true (L_return)); + add_int_reg_note (jump, REG_BR_PROB, prob_unlikely); + } addr1 = adjust_automodify_address (addr1, QImode, s1_addr, 0); addr2 = adjust_automodify_address (addr2, QImode, s2_addr, 0); @@ -522,14 +530,14 @@ sh_expand_cmpnstr (rtx *operands) emit_insn (gen_zero_extendqisi2 (tmp2, gen_lowpart (QImode, tmp2))); emit_insn (gen_zero_extendqisi2 (tmp1, gen_lowpart (QImode, tmp1))); - emit_label (L_return); - emit_insn (gen_subsi3 (operands[0], tmp1, tmp2)); + emit_label (L_return); + return true; } -/* Emit code to perform a strlen +/* Emit code to perform a strlen. OPERANDS[0] is the destination. OPERANDS[1] is the string. @@ -568,7 +576,7 @@ sh_expand_strlen (rtx *operands) addr1 = adjust_automodify_address (addr1, SImode, current_addr, 0); - /*start long loop. */ + /* start long loop. */ emit_label (L_loop_long); /* tmp1 is aligned, OK to load. */ |