/* Auxiliary functions for expand cpymem, setmem, cmpmem, load_multiple and store_multiple pattern of Andes NDS32 cpu for GNU compiler Copyright (C) 2012-2024 Free Software Foundation, Inc. Contributed by Andes Technology Corporation. This file is part of GCC. GCC is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3, or (at your option) any later version. GCC is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with GCC; see the file COPYING3. If not see . */ /* ------------------------------------------------------------------------ */ #define IN_TARGET_CODE 1 #include "config.h" #include "system.h" #include "coretypes.h" #include "backend.h" #include "target.h" #include "rtl.h" #include "memmodel.h" #include "emit-rtl.h" #include "explow.h" #include "tree.h" #include "expr.h" #include "optabs.h" #include "nds32-protos.h" /* ------------------------------------------------------------------------ */ /* Auxiliary static function definitions. */ static void nds32_emit_load_store (rtx reg, rtx mem, enum machine_mode mode, int offset, bool load_p) { rtx new_mem; new_mem = adjust_address (mem, mode, offset); if (load_p) emit_move_insn (reg, new_mem); else emit_move_insn (new_mem, reg); } static void nds32_emit_post_inc_load_store (rtx reg, rtx base_reg, enum machine_mode mode, bool load_p) { gcc_assert (GET_MODE (reg) == mode); gcc_assert (GET_MODE (base_reg) == Pmode); /* Do not gen (set (reg) (mem (post_inc (reg)))) directly here since it may not recognize by gcc, so let gcc combine it at auto_inc_dec pass. */ if (load_p) emit_move_insn (reg, gen_rtx_MEM (mode, base_reg)); else emit_move_insn (gen_rtx_MEM (mode, base_reg), reg); emit_move_insn (base_reg, plus_constant(Pmode, base_reg, GET_MODE_SIZE (mode))); } static void nds32_emit_mem_move (rtx src, rtx dst, enum machine_mode mode, int addr_offset) { gcc_assert (MEM_P (src) && MEM_P (dst)); rtx tmp_reg = gen_reg_rtx (mode); nds32_emit_load_store (tmp_reg, src, mode, addr_offset, /* load_p */ true); nds32_emit_load_store (tmp_reg, dst, mode, addr_offset, /* load_p */ false); } static void nds32_emit_mem_move_block (int base_regno, int count, rtx *dst_base_reg, rtx *dst_mem, rtx *src_base_reg, rtx *src_mem, bool update_base_reg_p) { rtx new_base_reg; emit_insn (nds32_expand_load_multiple (base_regno, count, *src_base_reg, *src_mem, update_base_reg_p, &new_base_reg)); if (update_base_reg_p) { *src_base_reg = new_base_reg; *src_mem = gen_rtx_MEM (SImode, *src_base_reg); } emit_insn (nds32_expand_store_multiple (base_regno, count, *dst_base_reg, *dst_mem, update_base_reg_p, &new_base_reg)); if (update_base_reg_p) { *dst_base_reg = new_base_reg; *dst_mem = gen_rtx_MEM (SImode, *dst_base_reg); } } /* ------------------------------------------------------------------------ */ /* Auxiliary function for expand cpymem pattern. */ static bool nds32_expand_cpymemsi_loop_unknown_size (rtx dstmem, rtx srcmem, rtx size, rtx alignment) { /* Emit loop version of cpymem. andi $size_least_3_bit, $size, #~7 add $dst_end, $dst, $size move $dst_itr, $dst move $src_itr, $src beqz $size_least_3_bit, .Lbyte_mode_entry ! Not large enough. add $double_word_end, $dst, $size_least_3_bit .Ldouble_word_mode_loop: lmw.bim $tmp-begin, [$src_itr], $tmp-end, #0 ! $src_itr' = $src_itr smw.bim $tmp-begin, [$dst_itr], $tmp-end, #0 ! $dst_itr' = $dst_itr ! move will delete after register allocation move $src_itr, $src_itr' move $dst_itr, $dst_itr' ! Not readch upper bound. Loop. bne $double_word_end, $dst_itr, .Ldouble_word_mode_loop .Lbyte_mode_entry: beq $dst_itr, $dst_end, .Lend_label .Lbyte_mode_loop: lbi.bi $tmp, [$src_itr], #1 sbi.bi $tmp, [$dst_itr], #1 ! Not readch upper bound. Loop. bne $dst_itr, $dst_end, .Lbyte_mode_loop .Lend_label: */ rtx dst_base_reg, src_base_reg; rtx dst_itr, src_itr; rtx dstmem_m, srcmem_m, dst_itr_m, src_itr_m; rtx dst_end; rtx size_least_3_bit; rtx double_word_end; rtx double_word_mode_loop, byte_mode_entry, byte_mode_loop, end_label; rtx tmp; rtx mask_least_3_bit; int start_regno; bool align_to_4_bytes = (INTVAL (alignment) & 3) == 0; if (TARGET_ISA_V3M && !align_to_4_bytes) return 0; if (TARGET_REDUCED_REGS) start_regno = 2; else start_regno = 16; dst_itr = gen_reg_rtx (Pmode); src_itr = gen_reg_rtx (Pmode); dst_end = gen_reg_rtx (Pmode); tmp = gen_reg_rtx (QImode); mask_least_3_bit = GEN_INT (~7); double_word_mode_loop = gen_label_rtx (); byte_mode_entry = gen_label_rtx (); byte_mode_loop = gen_label_rtx (); end_label = gen_label_rtx (); dst_base_reg = copy_to_mode_reg (Pmode, XEXP (dstmem, 0)); src_base_reg = copy_to_mode_reg (Pmode, XEXP (srcmem, 0)); /* andi $size_least_3_bit, $size, #~7 */ size_least_3_bit = expand_binop (SImode, and_optab, size, mask_least_3_bit, NULL_RTX, 0, OPTAB_WIDEN); /* add $dst_end, $dst, $size */ dst_end = expand_binop (Pmode, add_optab, dst_base_reg, size, NULL_RTX, 0, OPTAB_WIDEN); /* move $dst_itr, $dst move $src_itr, $src */ emit_move_insn (dst_itr, dst_base_reg); emit_move_insn (src_itr, src_base_reg); /* beqz $size_least_3_bit, .Lbyte_mode_entry ! Not large enough. */ emit_cmp_and_jump_insns (size_least_3_bit, const0_rtx, EQ, NULL, SImode, 1, byte_mode_entry); /* add $double_word_end, $dst, $size_least_3_bit */ double_word_end = expand_binop (Pmode, add_optab, dst_base_reg, size_least_3_bit, NULL_RTX, 0, OPTAB_WIDEN); /* .Ldouble_word_mode_loop: */ emit_label (double_word_mode_loop); /* lmw.bim $tmp-begin, [$src_itr], $tmp-end, #0 ! $src_itr' = $src_itr smw.bim $tmp-begin, [$dst_itr], $tmp-end, #0 ! $dst_itr' = $dst_itr */ src_itr_m = src_itr; dst_itr_m = dst_itr; srcmem_m = srcmem; dstmem_m = dstmem; nds32_emit_mem_move_block (start_regno, 2, &dst_itr_m, &dstmem_m, &src_itr_m, &srcmem_m, true); /* move $src_itr, $src_itr' move $dst_itr, $dst_itr' */ emit_move_insn (dst_itr, dst_itr_m); emit_move_insn (src_itr, src_itr_m); /* ! Not readch upper bound. Loop. bne $double_word_end, $dst_itr, .Ldouble_word_mode_loop */ emit_cmp_and_jump_insns (double_word_end, dst_itr, NE, NULL, Pmode, 1, double_word_mode_loop); /* .Lbyte_mode_entry: */ emit_label (byte_mode_entry); /* beq $dst_itr, $dst_end, .Lend_label */ emit_cmp_and_jump_insns (dst_itr, dst_end, EQ, NULL, Pmode, 1, end_label); /* .Lbyte_mode_loop: */ emit_label (byte_mode_loop); /* lbi.bi $tmp, [$src_itr], #1 */ nds32_emit_post_inc_load_store (tmp, src_itr, QImode, true); /* sbi.bi $tmp, [$dst_itr], #1 */ nds32_emit_post_inc_load_store (tmp, dst_itr, QImode, false); /* ! Not readch upper bound. Loop. bne $dst_itr, $dst_end, .Lbyte_mode_loop */ emit_cmp_and_jump_insns (dst_itr, dst_end, NE, NULL, SImode, 1, byte_mode_loop); /* .Lend_label: */ emit_label (end_label); return true; } static bool nds32_expand_cpymemsi_loop_known_size (rtx dstmem, rtx srcmem, rtx size, rtx alignment) { rtx dst_base_reg, src_base_reg; rtx dst_itr, src_itr; rtx dstmem_m, srcmem_m, dst_itr_m, src_itr_m; rtx dst_end; rtx double_word_mode_loop, byte_mode_loop; rtx tmp; int start_regno; bool align_to_4_bytes = (INTVAL (alignment) & 3) == 0; unsigned HOST_WIDE_INT total_bytes = UINTVAL (size); if (TARGET_ISA_V3M && !align_to_4_bytes) return 0; if (TARGET_REDUCED_REGS) start_regno = 2; else start_regno = 16; dst_itr = gen_reg_rtx (Pmode); src_itr = gen_reg_rtx (Pmode); dst_end = gen_reg_rtx (Pmode); tmp = gen_reg_rtx (QImode); double_word_mode_loop = gen_label_rtx (); byte_mode_loop = gen_label_rtx (); dst_base_reg = copy_to_mode_reg (Pmode, XEXP (dstmem, 0)); src_base_reg = copy_to_mode_reg (Pmode, XEXP (srcmem, 0)); if (total_bytes < 8) { /* Emit total_bytes less than 8 loop version of cpymem. add $dst_end, $dst, $size move $dst_itr, $dst .Lbyte_mode_loop: lbi.bi $tmp, [$src_itr], #1 sbi.bi $tmp, [$dst_itr], #1 ! Not readch upper bound. Loop. bne $dst_itr, $dst_end, .Lbyte_mode_loop */ /* add $dst_end, $dst, $size */ dst_end = expand_binop (Pmode, add_optab, dst_base_reg, size, NULL_RTX, 0, OPTAB_WIDEN); /* move $dst_itr, $dst move $src_itr, $src */ emit_move_insn (dst_itr, dst_base_reg); emit_move_insn (src_itr, src_base_reg); /* .Lbyte_mode_loop: */ emit_label (byte_mode_loop); /* lbi.bi $tmp, [$src_itr], #1 */ nds32_emit_post_inc_load_store (tmp, src_itr, QImode, true); /* sbi.bi $tmp, [$dst_itr], #1 */ nds32_emit_post_inc_load_store (tmp, dst_itr, QImode, false); /* ! Not readch upper bound. Loop. bne $dst_itr, $dst_end, .Lbyte_mode_loop */ emit_cmp_and_jump_insns (dst_itr, dst_end, NE, NULL, SImode, 1, byte_mode_loop); return true; } else if (total_bytes % 8 == 0) { /* Emit multiple of 8 loop version of cpymem. add $dst_end, $dst, $size move $dst_itr, $dst move $src_itr, $src .Ldouble_word_mode_loop: lmw.bim $tmp-begin, [$src_itr], $tmp-end, #0 ! $src_itr' = $src_itr smw.bim $tmp-begin, [$dst_itr], $tmp-end, #0 ! $dst_itr' = $dst_itr ! move will delete after register allocation move $src_itr, $src_itr' move $dst_itr, $dst_itr' ! Not readch upper bound. Loop. bne $double_word_end, $dst_itr, .Ldouble_word_mode_loop */ /* add $dst_end, $dst, $size */ dst_end = expand_binop (Pmode, add_optab, dst_base_reg, size, NULL_RTX, 0, OPTAB_WIDEN); /* move $dst_itr, $dst move $src_itr, $src */ emit_move_insn (dst_itr, dst_base_reg); emit_move_insn (src_itr, src_base_reg); /* .Ldouble_word_mode_loop: */ emit_label (double_word_mode_loop); /* lmw.bim $tmp-begin, [$src_itr], $tmp-end, #0 ! $src_itr' = $src_itr smw.bim $tmp-begin, [$dst_itr], $tmp-end, #0 ! $dst_itr' = $dst_itr */ src_itr_m = src_itr; dst_itr_m = dst_itr; srcmem_m = srcmem; dstmem_m = dstmem; nds32_emit_mem_move_block (start_regno, 2, &dst_itr_m, &dstmem_m, &src_itr_m, &srcmem_m, true); /* move $src_itr, $src_itr' move $dst_itr, $dst_itr' */ emit_move_insn (dst_itr, dst_itr_m); emit_move_insn (src_itr, src_itr_m); /* ! Not readch upper bound. Loop. bne $double_word_end, $dst_itr, .Ldouble_word_mode_loop */ emit_cmp_and_jump_insns (dst_end, dst_itr, NE, NULL, Pmode, 1, double_word_mode_loop); } else { /* Handle size greater than 8, and not a multiple of 8. */ return nds32_expand_cpymemsi_loop_unknown_size (dstmem, srcmem, size, alignment); } return true; } static bool nds32_expand_cpymemsi_loop (rtx dstmem, rtx srcmem, rtx size, rtx alignment) { if (CONST_INT_P (size)) return nds32_expand_cpymemsi_loop_known_size (dstmem, srcmem, size, alignment); else return nds32_expand_cpymemsi_loop_unknown_size (dstmem, srcmem, size, alignment); } static bool nds32_expand_cpymemsi_unroll (rtx dstmem, rtx srcmem, rtx total_bytes, rtx alignment) { rtx dst_base_reg, src_base_reg; rtx tmp_reg; int maximum_bytes; int maximum_bytes_per_inst; int maximum_regs; int start_regno; int i, inst_num; HOST_WIDE_INT remain_bytes, remain_words; bool align_to_4_bytes = (INTVAL (alignment) & 3) == 0; bool align_to_2_bytes = (INTVAL (alignment) & 1) == 0; /* Because reduced-set regsiters has few registers (r0~r5, r6~10, r15, r28~r31, where 'r15' and 'r28~r31' cannot be used for register allocation), using 8 registers (32 bytes) for moving memory block may easily consume all of them. It makes register allocation/spilling hard to work. So we only allow maximum=4 registers (16 bytes) for moving memory block under reduced-set registers. */ if (TARGET_REDUCED_REGS) { maximum_regs = 4; maximum_bytes = 64; start_regno = 2; } else { /* $r25 is $tp so we use up to 8 registers. */ maximum_regs = 8; maximum_bytes = 160; start_regno = 16; } maximum_bytes_per_inst = maximum_regs * UNITS_PER_WORD; /* 1. Total_bytes is integer for sure. 2. Alignment is integer for sure. 3. Maximum 4 or 10 registers and up to 4 instructions, 4 * 4 * 4 = 64 bytes, 8 * 4 * 10 = 160 bytes. 4. The dstmem cannot be volatile memory access. 5. The srcmem cannot be volatile memory access. 6. Known shared alignment not align to 4 byte in v3m since lmw/smw *NOT* support unalign access with v3m configure. */ if (GET_CODE (total_bytes) != CONST_INT || GET_CODE (alignment) != CONST_INT || INTVAL (total_bytes) > maximum_bytes || MEM_VOLATILE_P (dstmem) || MEM_VOLATILE_P (srcmem) || (TARGET_ISA_V3M && !align_to_4_bytes)) return false; dst_base_reg = copy_to_mode_reg (SImode, XEXP (dstmem, 0)); src_base_reg = copy_to_mode_reg (SImode, XEXP (srcmem, 0)); remain_bytes = INTVAL (total_bytes); /* Do not update base address for last lmw/smw pair. */ inst_num = ((INTVAL (total_bytes) + (maximum_bytes_per_inst - 1)) / maximum_bytes_per_inst) - 1; for (i = 0; i < inst_num; i++) { nds32_emit_mem_move_block (start_regno, maximum_regs, &dst_base_reg, &dstmem, &src_base_reg, &srcmem, true); } remain_bytes -= maximum_bytes_per_inst * inst_num; remain_words = remain_bytes / UNITS_PER_WORD; remain_bytes = remain_bytes - (remain_words * UNITS_PER_WORD); if (remain_words != 0) { if (remain_bytes != 0) nds32_emit_mem_move_block (start_regno, remain_words, &dst_base_reg, &dstmem, &src_base_reg, &srcmem, true); else { /* Do not update address if no further byte to move. */ if (remain_words == 1) { /* emit move instruction if align to 4 byte and only 1 word to move. */ if (align_to_4_bytes) nds32_emit_mem_move (srcmem, dstmem, SImode, 0); else { tmp_reg = gen_reg_rtx (SImode); emit_insn ( gen_unaligned_load_w (tmp_reg, gen_rtx_MEM (SImode, src_base_reg))); emit_insn ( gen_unaligned_store_w (gen_rtx_MEM (SImode, dst_base_reg), tmp_reg)); } } else nds32_emit_mem_move_block (start_regno, remain_words, &dst_base_reg, &dstmem, &src_base_reg, &srcmem, false); } } switch (remain_bytes) { case 3: case 2: { if (align_to_2_bytes) nds32_emit_mem_move (srcmem, dstmem, HImode, 0); else { nds32_emit_mem_move (srcmem, dstmem, QImode, 0); nds32_emit_mem_move (srcmem, dstmem, QImode, 1); } if (remain_bytes == 3) nds32_emit_mem_move (srcmem, dstmem, QImode, 2); break; } case 1: nds32_emit_mem_move (srcmem, dstmem, QImode, 0); break; case 0: break; default: gcc_unreachable (); } /* Successfully create patterns, return true. */ return true; } /* Function to move block memory content by using load_multiple and store_multiple. This is auxiliary extern function to help create rtx template. Check nds32-multiple.md file for the patterns. */ bool nds32_expand_cpymemsi (rtx dstmem, rtx srcmem, rtx total_bytes, rtx alignment) { if (nds32_expand_cpymemsi_unroll (dstmem, srcmem, total_bytes, alignment)) return true; if (!optimize_size && optimize > 2) return nds32_expand_cpymemsi_loop (dstmem, srcmem, total_bytes, alignment); return false; } /* ------------------------------------------------------------------------ */ /* Auxiliary function for expand setmem pattern. */ static rtx nds32_gen_dup_4_byte_to_word_value_aux (rtx value, rtx value4word) { gcc_assert (GET_MODE (value) == QImode || CONST_INT_P (value)); if (CONST_INT_P (value)) { unsigned HOST_WIDE_INT val = UINTVAL (value) & GET_MODE_MASK(QImode); rtx new_val = gen_int_mode (val | (val << 8) | (val << 16) | (val << 24), SImode); /* Just calculate at here if it's constant value. */ emit_move_insn (value4word, new_val); } else { if (NDS32_EXT_DSP_P ()) { /* ! prepare word insb $tmp, $value, 1 ! $tmp <- 0x0000abab pkbb16 $tmp6, $tmp2, $tmp2 ! $value4word <- 0xabababab */ rtx tmp = gen_reg_rtx (SImode); convert_move (tmp, value, true); emit_insn ( gen_insvsi_internal (tmp, gen_int_mode (0x8, SImode), tmp)); emit_insn (gen_pkbbsi_1 (value4word, tmp, tmp)); } else { /* ! prepare word andi $tmp1, $value, 0xff ! $tmp1 <- 0x000000ab slli $tmp2, $tmp1, 8 ! $tmp2 <- 0x0000ab00 or $tmp3, $tmp1, $tmp2 ! $tmp3 <- 0x0000abab slli $tmp4, $tmp3, 16 ! $tmp4 <- 0xabab0000 or $val4word, $tmp3, $tmp4 ! $value4word <- 0xabababab */ rtx tmp1, tmp2, tmp3, tmp4; tmp1 = expand_binop (SImode, and_optab, value, gen_int_mode (0xff, SImode), NULL_RTX, 0, OPTAB_WIDEN); tmp2 = expand_binop (SImode, ashl_optab, tmp1, gen_int_mode (8, SImode), NULL_RTX, 0, OPTAB_WIDEN); tmp3 = expand_binop (SImode, ior_optab, tmp1, tmp2, NULL_RTX, 0, OPTAB_WIDEN); tmp4 = expand_binop (SImode, ashl_optab, tmp3, gen_int_mode (16, SImode), NULL_RTX, 0, OPTAB_WIDEN); emit_insn (gen_iorsi3 (value4word, tmp3, tmp4)); } } return value4word; } static rtx nds32_gen_dup_4_byte_to_word_value (rtx value) { rtx value4word = gen_reg_rtx (SImode); nds32_gen_dup_4_byte_to_word_value_aux (value, value4word); return value4word; } static rtx nds32_gen_dup_8_byte_to_double_word_value (rtx value) { rtx value4doubleword = gen_reg_rtx (DImode); nds32_gen_dup_4_byte_to_word_value_aux ( value, nds32_di_low_part_subreg(value4doubleword)); emit_move_insn (nds32_di_high_part_subreg(value4doubleword), nds32_di_low_part_subreg(value4doubleword)); return value4doubleword; } static rtx emit_setmem_doubleword_loop (rtx itr, rtx size, rtx value) { rtx word_mode_label = gen_label_rtx (); rtx word_mode_end_label = gen_label_rtx (); rtx byte_mode_size = gen_reg_rtx (SImode); rtx byte_mode_size_tmp = gen_reg_rtx (SImode); rtx word_mode_end = gen_reg_rtx (SImode); rtx size_for_word = gen_reg_rtx (SImode); /* and $size_for_word, $size, #~0x7 */ size_for_word = expand_binop (SImode, and_optab, size, gen_int_mode (~0x7, SImode), NULL_RTX, 0, OPTAB_WIDEN); emit_move_insn (byte_mode_size, size); /* beqz $size_for_word, .Lbyte_mode_entry */ emit_cmp_and_jump_insns (size_for_word, const0_rtx, EQ, NULL, SImode, 1, word_mode_end_label); /* add $word_mode_end, $dst, $size_for_word */ word_mode_end = expand_binop (Pmode, add_optab, itr, size_for_word, NULL_RTX, 0, OPTAB_WIDEN); /* andi $byte_mode_size, $size, 0x7 */ byte_mode_size_tmp = expand_binop (SImode, and_optab, size, GEN_INT (0x7), NULL_RTX, 0, OPTAB_WIDEN); emit_move_insn (byte_mode_size, byte_mode_size_tmp); /* .Lword_mode: */ emit_label (word_mode_label); /* ! word-mode set loop smw.bim $value4word, [$dst_itr], $value4word, 0 bne $word_mode_end, $dst_itr, .Lword_mode */ emit_insn (gen_unaligned_store_update_base_dw (itr, itr, value)); emit_cmp_and_jump_insns (word_mode_end, itr, NE, NULL, Pmode, 1, word_mode_label); emit_label (word_mode_end_label); return byte_mode_size; } static rtx emit_setmem_byte_loop (rtx itr, rtx size, rtx value, bool need_end) { rtx end = gen_reg_rtx (Pmode); rtx byte_mode_label = gen_label_rtx (); rtx end_label = gen_label_rtx (); value = force_reg (QImode, value); if (need_end) end = expand_binop (Pmode, add_optab, itr, size, NULL_RTX, 0, OPTAB_WIDEN); /* beqz $byte_mode_size, .Lend add $byte_mode_end, $dst_itr, $byte_mode_size */ emit_cmp_and_jump_insns (size, const0_rtx, EQ, NULL, SImode, 1, end_label); if (!need_end) end = expand_binop (Pmode, add_optab, itr, size, NULL_RTX, 0, OPTAB_WIDEN); /* .Lbyte_mode: */ emit_label (byte_mode_label); /* ! byte-mode set loop sbi.bi $value, [$dst_itr] ,1 bne $byte_mode_end, $dst_itr, .Lbyte_mode */ nds32_emit_post_inc_load_store (value, itr, QImode, false); emit_cmp_and_jump_insns (end, itr, NE, NULL, Pmode, 1, byte_mode_label); /* .Lend: */ emit_label (end_label); if (need_end) return end; else return NULL_RTX; } static bool nds32_expand_setmem_loop (rtx dstmem, rtx size, rtx value) { rtx value4doubleword; rtx value4byte; rtx dst; rtx byte_mode_size; /* Emit loop version of setmem. memset: ! prepare word andi $tmp1, $val, 0xff ! $tmp1 <- 0x000000ab slli $tmp2, $tmp1, 8 ! $tmp2 <- 0x0000ab00 or $tmp3, $val, $tmp2 ! $tmp3 <- 0x0000abab slli $tmp4, $tmp3, 16 ! $tmp4 <- 0xabab0000 or $val4word, $tmp3, $tmp4 ! $value4word <- 0xabababab and $size_for_word, $size, #-4 beqz $size_for_word, .Lword_mode_end add $word_mode_end, $dst, $size_for_word andi $byte_mode_size, $size, 3 .Lword_mode: ! word-mode set loop smw.bim $value4word, [$dst], $value4word, 0 bne $word_mode_end, $dst, .Lword_mode .Lword_mode_end: beqz $byte_mode_size, .Lend add $byte_mode_end, $dst, $byte_mode_size .Lbyte_mode: ! byte-mode set loop sbi.bi $value4word, [$dst] ,1 bne $byte_mode_end, $dst, .Lbyte_mode .Lend: */ dst = copy_to_mode_reg (SImode, XEXP (dstmem, 0)); /* ! prepare word andi $tmp1, $value, 0xff ! $tmp1 <- 0x000000ab slli $tmp2, $tmp1, 8 ! $tmp2 <- 0x0000ab00 or $tmp3, $tmp1, $tmp2 ! $tmp3 <- 0x0000abab slli $tmp4, $tmp3, 16 ! $tmp4 <- 0xabab0000 or $val4word, $tmp3, $tmp4 ! $value4word <- 0xabababab */ value4doubleword = nds32_gen_dup_8_byte_to_double_word_value (value); /* and $size_for_word, $size, #-4 beqz $size_for_word, .Lword_mode_end add $word_mode_end, $dst, $size_for_word andi $byte_mode_size, $size, 3 .Lword_mode: ! word-mode set loop smw.bim $value4word, [$dst], $value4word, 0 bne $word_mode_end, $dst, .Lword_mode .Lword_mode_end: */ byte_mode_size = emit_setmem_doubleword_loop (dst, size, value4doubleword); /* beqz $byte_mode_size, .Lend add $byte_mode_end, $dst, $byte_mode_size .Lbyte_mode: ! byte-mode set loop sbi.bi $value, [$dst] ,1 bne $byte_mode_end, $dst, .Lbyte_mode .Lend: */ value4byte = simplify_gen_subreg (QImode, value4doubleword, DImode, subreg_lowpart_offset (QImode, DImode)); emit_setmem_byte_loop (dst, byte_mode_size, value4byte, false); return true; } static bool nds32_expand_setmem_loop_v3m (rtx dstmem, rtx size, rtx value) { rtx base_reg = copy_to_mode_reg (Pmode, XEXP (dstmem, 0)); rtx need_align_bytes = gen_reg_rtx (SImode); rtx last_2_bit = gen_reg_rtx (SImode); rtx byte_loop_base = gen_reg_rtx (SImode); rtx byte_loop_size = gen_reg_rtx (SImode); rtx remain_size = gen_reg_rtx (SImode); rtx new_base_reg; rtx value4byte, value4doubleword; rtx byte_mode_size; rtx last_byte_loop_label = gen_label_rtx (); size = force_reg (SImode, size); value4doubleword = nds32_gen_dup_8_byte_to_double_word_value (value); value4byte = simplify_gen_subreg (QImode, value4doubleword, DImode, subreg_lowpart_offset (QImode, DImode)); emit_move_insn (byte_loop_size, size); emit_move_insn (byte_loop_base, base_reg); /* Jump to last byte loop if size is less than 16. */ emit_cmp_and_jump_insns (size, gen_int_mode (16, SImode), LE, NULL, SImode, 1, last_byte_loop_label); /* Make sure align to 4 byte first since v3m can't unalign access. */ emit_insn (gen_andsi3 (last_2_bit, base_reg, gen_int_mode (0x3, SImode))); emit_insn (gen_subsi3 (need_align_bytes, gen_int_mode (4, SImode), last_2_bit)); /* Align to 4 byte. */ new_base_reg = emit_setmem_byte_loop (base_reg, need_align_bytes, value4byte, true); /* Calculate remain size. */ emit_insn (gen_subsi3 (remain_size, size, need_align_bytes)); /* Set memory word by word. */ byte_mode_size = emit_setmem_doubleword_loop (new_base_reg, remain_size, value4doubleword); emit_move_insn (byte_loop_base, new_base_reg); emit_move_insn (byte_loop_size, byte_mode_size); emit_label (last_byte_loop_label); /* And set memory for remain bytes. */ emit_setmem_byte_loop (byte_loop_base, byte_loop_size, value4byte, false); return true; } static bool nds32_expand_setmem_unroll (rtx dstmem, rtx size, rtx value, rtx align ATTRIBUTE_UNUSED, rtx expected_align ATTRIBUTE_UNUSED, rtx expected_size ATTRIBUTE_UNUSED) { unsigned maximum_regs, maximum_bytes, start_regno, regno; rtx value4word; rtx dst_base_reg, new_base_reg; unsigned HOST_WIDE_INT remain_bytes, remain_words, prepare_regs, fill_per_smw; unsigned HOST_WIDE_INT real_size; if (TARGET_REDUCED_REGS) { maximum_regs = 4; maximum_bytes = 64; start_regno = 2; } else { maximum_regs = 8; maximum_bytes = 128; start_regno = 16; } real_size = UINTVAL (size) & GET_MODE_MASK(SImode); if (!(CONST_INT_P (size) && real_size <= maximum_bytes)) return false; remain_bytes = real_size; gcc_assert (GET_MODE (value) == QImode || CONST_INT_P (value)); value4word = nds32_gen_dup_4_byte_to_word_value (value); prepare_regs = remain_bytes / UNITS_PER_WORD; dst_base_reg = copy_to_mode_reg (SImode, XEXP (dstmem, 0)); if (prepare_regs > maximum_regs) prepare_regs = maximum_regs; fill_per_smw = prepare_regs * UNITS_PER_WORD; regno = start_regno; switch (prepare_regs) { case 2: default: { rtx reg0 = gen_rtx_REG (SImode, regno); rtx reg1 = gen_rtx_REG (SImode, regno+1); unsigned last_regno = start_regno + prepare_regs - 1; emit_move_insn (reg0, value4word); emit_move_insn (reg1, value4word); rtx regd = gen_rtx_REG (DImode, regno); regno += 2; /* Try to utilize movd44! */ while (regno <= last_regno) { if ((regno + 1) <=last_regno) { rtx reg = gen_rtx_REG (DImode, regno); emit_move_insn (reg, regd); regno += 2; } else { rtx reg = gen_rtx_REG (SImode, regno); emit_move_insn (reg, reg0); regno += 1; } } break; } case 1: { rtx reg = gen_rtx_REG (SImode, regno++); emit_move_insn (reg, value4word); } break; case 0: break; } if (fill_per_smw) for (;remain_bytes >= fill_per_smw;remain_bytes -= fill_per_smw) { emit_insn (nds32_expand_store_multiple (start_regno, prepare_regs, dst_base_reg, dstmem, true, &new_base_reg)); dst_base_reg = new_base_reg; dstmem = gen_rtx_MEM (SImode, dst_base_reg); } remain_words = remain_bytes / UNITS_PER_WORD; if (remain_words) { emit_insn (nds32_expand_store_multiple (start_regno, remain_words, dst_base_reg, dstmem, true, &new_base_reg)); dst_base_reg = new_base_reg; dstmem = gen_rtx_MEM (SImode, dst_base_reg); } remain_bytes = remain_bytes - (remain_words * UNITS_PER_WORD); if (remain_bytes) { value = simplify_gen_subreg (QImode, value4word, SImode, subreg_lowpart_offset(QImode, SImode)); int offset = 0; for (;remain_bytes;--remain_bytes, ++offset) { nds32_emit_load_store (value, dstmem, QImode, offset, false); } } return true; } bool nds32_expand_setmem (rtx dstmem, rtx size, rtx value, rtx align, rtx expected_align, rtx expected_size) { bool align_to_4_bytes = (INTVAL (align) & 3) == 0; /* Only expand at O3 */ if (optimize_size || optimize < 3) return false; if (TARGET_ISA_V3M && !align_to_4_bytes) return nds32_expand_setmem_loop_v3m (dstmem, size, value); if (nds32_expand_setmem_unroll (dstmem, size, value, align, expected_align, expected_size)) return true; return nds32_expand_setmem_loop (dstmem, size, value); } /* ------------------------------------------------------------------------ */ /* Auxiliary function for expand strlen pattern. */ bool nds32_expand_strlen (rtx result, rtx str, rtx target_char, rtx align ATTRIBUTE_UNUSED) { rtx base_reg, backup_base_reg; rtx ffb_result; rtx target_char_ptr, length; rtx loop_label, tmp; if (optimize_size || optimize < 3) return false; gcc_assert (MEM_P (str)); gcc_assert (CONST_INT_P (target_char) || REG_P (target_char)); base_reg = copy_to_mode_reg (SImode, XEXP (str, 0)); loop_label = gen_label_rtx (); ffb_result = gen_reg_rtx (Pmode); tmp = gen_reg_rtx (SImode); backup_base_reg = gen_reg_rtx (SImode); /* Emit loop version of strlen. move $backup_base, $base .Lloop: lmw.bim $tmp, [$base], $tmp, 0 ffb $ffb_result, $tmp, $target_char ! is there $target_char? beqz $ffb_result, .Lloop add $last_char_ptr, $base, $ffb_result sub $length, $last_char_ptr, $backup_base */ /* move $backup_base, $base */ emit_move_insn (backup_base_reg, base_reg); /* .Lloop: */ emit_label (loop_label); /* lmw.bim $tmp, [$base], $tmp, 0 */ emit_insn (gen_unaligned_load_update_base_w (base_reg, tmp, base_reg)); /* ffb $ffb_result, $tmp, $target_char ! is there $target_char? */ emit_insn (gen_unspec_ffb (ffb_result, tmp, target_char)); /* beqz $ffb_result, .Lloop */ emit_cmp_and_jump_insns (ffb_result, const0_rtx, EQ, NULL, SImode, 1, loop_label); /* add $target_char_ptr, $base, $ffb_result */ target_char_ptr = expand_binop (Pmode, add_optab, base_reg, ffb_result, NULL_RTX, 0, OPTAB_WIDEN); /* sub $length, $target_char_ptr, $backup_base */ length = expand_binop (Pmode, sub_optab, target_char_ptr, backup_base_reg, NULL_RTX, 0, OPTAB_WIDEN); emit_move_insn (result, length); return true; } /* ------------------------------------------------------------------------ */ /* Functions to expand load_multiple and store_multiple. They are auxiliary extern functions to help create rtx template. Check nds32-multiple.md file for the patterns. */ rtx nds32_expand_load_multiple (int base_regno, int count, rtx base_addr, rtx basemem, bool update_base_reg_p, rtx *update_base_reg) { int par_index; int offset; int start_idx; rtx result; rtx new_addr, mem, reg; /* Generate a unaligned load to prevent load instruction pull out from parallel, and then it will generate lwi, and lose unaligned acces */ if (count == 1) { reg = gen_rtx_REG (SImode, base_regno); if (update_base_reg_p) { *update_base_reg = gen_reg_rtx (SImode); return gen_unaligned_load_update_base_w (*update_base_reg, reg, base_addr); } else return gen_unaligned_load_w (reg, gen_rtx_MEM (SImode, base_addr)); } /* Create the pattern that is presented in nds32-multiple.md. */ if (update_base_reg_p) { result = gen_rtx_PARALLEL (VOIDmode, rtvec_alloc (count + 1)); start_idx = 1; } else { result = gen_rtx_PARALLEL (VOIDmode, rtvec_alloc (count)); start_idx = 0; } if (update_base_reg_p) { offset = count * 4; new_addr = plus_constant (Pmode, base_addr, offset); *update_base_reg = gen_reg_rtx (SImode); XVECEXP (result, 0, 0) = gen_rtx_SET (*update_base_reg, new_addr); } for (par_index = 0; par_index < count; par_index++) { offset = par_index * 4; /* 4-byte for loading data to each register. */ new_addr = plus_constant (Pmode, base_addr, offset); mem = adjust_automodify_address_nv (basemem, SImode, new_addr, offset); reg = gen_rtx_REG (SImode, base_regno + par_index); XVECEXP (result, 0, (par_index + start_idx)) = gen_rtx_SET (reg, mem); } return result; } rtx nds32_expand_store_multiple (int base_regno, int count, rtx base_addr, rtx basemem, bool update_base_reg_p, rtx *update_base_reg) { int par_index; int offset; int start_idx; rtx result; rtx new_addr, mem, reg; if (count == 1) { reg = gen_rtx_REG (SImode, base_regno); if (update_base_reg_p) { *update_base_reg = gen_reg_rtx (SImode); return gen_unaligned_store_update_base_w (*update_base_reg, base_addr, reg); } else return gen_unaligned_store_w (gen_rtx_MEM (SImode, base_addr), reg); } /* Create the pattern that is presented in nds32-multiple.md. */ if (update_base_reg_p) { result = gen_rtx_PARALLEL (VOIDmode, rtvec_alloc (count + 1)); start_idx = 1; } else { result = gen_rtx_PARALLEL (VOIDmode, rtvec_alloc (count)); start_idx = 0; } if (update_base_reg_p) { offset = count * 4; new_addr = plus_constant (Pmode, base_addr, offset); *update_base_reg = gen_reg_rtx (SImode); XVECEXP (result, 0, 0) = gen_rtx_SET (*update_base_reg, new_addr); } for (par_index = 0; par_index < count; par_index++) { offset = par_index * 4; /* 4-byte for storing data to memory. */ new_addr = plus_constant (Pmode, base_addr, offset); mem = adjust_automodify_address_nv (basemem, SImode, new_addr, offset); reg = gen_rtx_REG (SImode, base_regno + par_index); XVECEXP (result, 0, par_index + start_idx) = gen_rtx_SET (mem, reg); } return result; } /* ------------------------------------------------------------------------ */