diff options
| -rw-r--r-- | gcc/config/arc/arc.cc | 350 |
1 files changed, 318 insertions, 32 deletions
diff --git a/gcc/config/arc/arc.cc b/gcc/config/arc/arc.cc index 6a80442..179f11f 100644 --- a/gcc/config/arc/arc.cc +++ b/gcc/config/arc/arc.cc @@ -4222,6 +4222,253 @@ output_shift_loop (enum rtx_code code, rtx *operands) return ""; } +/* See below where shifts are handled for explanation of this enum. */ +enum arc_shift_alg +{ + SHIFT_MOVE, /* Register-to-register move. */ + SHIFT_LOOP, /* Zero-overhead loop implementation. */ + SHIFT_INLINE, /* Mmultiple LSHIFTs and LSHIFT-PLUSs. */ + SHIFT_AND_ROT, /* Bitwise AND, then ROTATERTs. */ + SHIFT_SWAP, /* SWAP then multiple LSHIFTs/LSHIFT-PLUSs. */ + SHIFT_AND_SWAP_ROT /* Bitwise AND, then SWAP, then ROTATERTs. */ +}; + +struct arc_shift_info { + enum arc_shift_alg alg; + unsigned int cost; +}; + +/* Return shift algorithm context, an index into the following tables. + * 0 for -Os (optimize for size) 3 for -O2 (optimized for speed) + * 1 for -Os -mswap TARGET_V2 4 for -O2 -mswap TARGET_V2 + * 2 for -Os -mswap !TARGET_V2 5 for -O2 -mswap !TARGET_V2 */ +static unsigned int +arc_shift_context_idx () +{ + if (optimize_function_for_size_p (cfun)) + { + if (!TARGET_SWAP) + return 0; + if (TARGET_V2) + return 1; + return 2; + } + else + { + if (!TARGET_SWAP) + return 3; + if (TARGET_V2) + return 4; + return 5; + } +} + +static const arc_shift_info arc_ashl_alg[6][32] = { + { /* 0: -Os. */ + { SHIFT_MOVE, COSTS_N_INSNS (1) }, /* 0 */ + { SHIFT_INLINE, COSTS_N_INSNS (1) }, /* 1 */ + { SHIFT_INLINE, COSTS_N_INSNS (2) }, /* 2 */ + { SHIFT_INLINE, COSTS_N_INSNS (2) }, /* 3 */ + { SHIFT_INLINE, COSTS_N_INSNS (3) }, /* 4 */ + { SHIFT_INLINE, COSTS_N_INSNS (3) }, /* 5 */ + { SHIFT_INLINE, COSTS_N_INSNS (3) }, /* 6 */ + { SHIFT_INLINE, COSTS_N_INSNS (4) }, /* 7 */ + { SHIFT_INLINE, COSTS_N_INSNS (4) }, /* 8 */ + { SHIFT_INLINE, COSTS_N_INSNS (4) }, /* 9 */ + { SHIFT_LOOP, COSTS_N_INSNS (4) }, /* 10 */ + { SHIFT_LOOP, COSTS_N_INSNS (4) }, /* 11 */ + { SHIFT_LOOP, COSTS_N_INSNS (4) }, /* 12 */ + { SHIFT_LOOP, COSTS_N_INSNS (4) }, /* 13 */ + { SHIFT_LOOP, COSTS_N_INSNS (4) }, /* 14 */ + { SHIFT_LOOP, COSTS_N_INSNS (4) }, /* 15 */ + { SHIFT_LOOP, COSTS_N_INSNS (4) }, /* 16 */ + { SHIFT_LOOP, COSTS_N_INSNS (4) }, /* 17 */ + { SHIFT_LOOP, COSTS_N_INSNS (4) }, /* 18 */ + { SHIFT_LOOP, COSTS_N_INSNS (4) }, /* 19 */ + { SHIFT_LOOP, COSTS_N_INSNS (4) }, /* 20 */ + { SHIFT_LOOP, COSTS_N_INSNS (4) }, /* 21 */ + { SHIFT_LOOP, COSTS_N_INSNS (4) }, /* 22 */ + { SHIFT_LOOP, COSTS_N_INSNS (4) }, /* 23 */ + { SHIFT_LOOP, COSTS_N_INSNS (4) }, /* 24 */ + { SHIFT_LOOP, COSTS_N_INSNS (4) }, /* 25 */ + { SHIFT_LOOP, COSTS_N_INSNS (4) }, /* 26 */ + { SHIFT_LOOP, COSTS_N_INSNS (4) }, /* 27 */ + { SHIFT_LOOP, COSTS_N_INSNS (4) }, /* 28 */ + { SHIFT_AND_ROT, COSTS_N_INSNS (4) }, /* 29 */ + { SHIFT_AND_ROT, COSTS_N_INSNS (3) }, /* 30 */ + { SHIFT_AND_ROT, COSTS_N_INSNS (2) } /* 31 */ + }, + { /* 1: -Os -mswap TARGET_V2. */ + { SHIFT_MOVE, COSTS_N_INSNS (1) }, /* 0 */ + { SHIFT_INLINE, COSTS_N_INSNS (1) }, /* 1 */ + { SHIFT_INLINE, COSTS_N_INSNS (2) }, /* 2 */ + { SHIFT_INLINE, COSTS_N_INSNS (2) }, /* 3 */ + { SHIFT_INLINE, COSTS_N_INSNS (3) }, /* 4 */ + { SHIFT_INLINE, COSTS_N_INSNS (3) }, /* 5 */ + { SHIFT_INLINE, COSTS_N_INSNS (3) }, /* 6 */ + { SHIFT_INLINE, COSTS_N_INSNS (4) }, /* 7 */ + { SHIFT_INLINE, COSTS_N_INSNS (4) }, /* 8 */ + { SHIFT_INLINE, COSTS_N_INSNS (4) }, /* 9 */ + { SHIFT_LOOP, COSTS_N_INSNS (4) }, /* 10 */ + { SHIFT_LOOP, COSTS_N_INSNS (4) }, /* 11 */ + { SHIFT_LOOP, COSTS_N_INSNS (4) }, /* 12 */ + { SHIFT_LOOP, COSTS_N_INSNS (4) }, /* 13 */ + { SHIFT_AND_SWAP_ROT, COSTS_N_INSNS (4) }, /* 14 */ + { SHIFT_AND_SWAP_ROT, COSTS_N_INSNS (3) }, /* 15 */ + { SHIFT_SWAP, COSTS_N_INSNS (1) }, /* 16 */ + { SHIFT_SWAP, COSTS_N_INSNS (2) }, /* 17 */ + { SHIFT_SWAP, COSTS_N_INSNS (3) }, /* 18 */ + { SHIFT_SWAP, COSTS_N_INSNS (3) }, /* 19 */ + { SHIFT_SWAP, COSTS_N_INSNS (4) }, /* 20 */ + { SHIFT_SWAP, COSTS_N_INSNS (4) }, /* 21 */ + { SHIFT_SWAP, COSTS_N_INSNS (4) }, /* 22 */ + { SHIFT_LOOP, COSTS_N_INSNS (4) }, /* 23 */ + { SHIFT_LOOP, COSTS_N_INSNS (4) }, /* 24 */ + { SHIFT_LOOP, COSTS_N_INSNS (4) }, /* 25 */ + { SHIFT_LOOP, COSTS_N_INSNS (4) }, /* 26 */ + { SHIFT_LOOP, COSTS_N_INSNS (4) }, /* 27 */ + { SHIFT_LOOP, COSTS_N_INSNS (4) }, /* 28 */ + { SHIFT_AND_ROT, COSTS_N_INSNS (4) }, /* 29 */ + { SHIFT_AND_ROT, COSTS_N_INSNS (3) }, /* 30 */ + { SHIFT_AND_ROT, COSTS_N_INSNS (2) } /* 31 */ + }, + { /* 2: -Os -mswap !TARGET_V2. */ + { SHIFT_MOVE, COSTS_N_INSNS (1) }, /* 0 */ + { SHIFT_INLINE, COSTS_N_INSNS (1) }, /* 1 */ + { SHIFT_INLINE, COSTS_N_INSNS (2) }, /* 2 */ + { SHIFT_INLINE, COSTS_N_INSNS (2) }, /* 3 */ + { SHIFT_INLINE, COSTS_N_INSNS (3) }, /* 4 */ + { SHIFT_INLINE, COSTS_N_INSNS (3) }, /* 5 */ + { SHIFT_INLINE, COSTS_N_INSNS (3) }, /* 6 */ + { SHIFT_INLINE, COSTS_N_INSNS (4) }, /* 7 */ + { SHIFT_INLINE, COSTS_N_INSNS (4) }, /* 8 */ + { SHIFT_INLINE, COSTS_N_INSNS (4) }, /* 9 */ + { SHIFT_LOOP, COSTS_N_INSNS (4) }, /* 10 */ + { SHIFT_LOOP, COSTS_N_INSNS (4) }, /* 11 */ + { SHIFT_LOOP, COSTS_N_INSNS (4) }, /* 12 */ + { SHIFT_LOOP, COSTS_N_INSNS (4) }, /* 13 */ + { SHIFT_AND_SWAP_ROT, COSTS_N_INSNS (4) }, /* 14 */ + { SHIFT_AND_SWAP_ROT, COSTS_N_INSNS (3) }, /* 15 */ + { SHIFT_SWAP, COSTS_N_INSNS (2) }, /* 16 */ + { SHIFT_SWAP, COSTS_N_INSNS (3) }, /* 17 */ + { SHIFT_SWAP, COSTS_N_INSNS (4) }, /* 18 */ + { SHIFT_SWAP, COSTS_N_INSNS (4) }, /* 19 */ + { SHIFT_LOOP, COSTS_N_INSNS (4) }, /* 20 */ + { SHIFT_LOOP, COSTS_N_INSNS (4) }, /* 21 */ + { SHIFT_LOOP, COSTS_N_INSNS (4) }, /* 22 */ + { SHIFT_LOOP, COSTS_N_INSNS (4) }, /* 23 */ + { SHIFT_LOOP, COSTS_N_INSNS (4) }, /* 24 */ + { SHIFT_LOOP, COSTS_N_INSNS (4) }, /* 25 */ + { SHIFT_LOOP, COSTS_N_INSNS (4) }, /* 26 */ + { SHIFT_LOOP, COSTS_N_INSNS (4) }, /* 27 */ + { SHIFT_LOOP, COSTS_N_INSNS (4) }, /* 28 */ + { SHIFT_AND_ROT, COSTS_N_INSNS (4) }, /* 29 */ + { SHIFT_AND_ROT, COSTS_N_INSNS (3) }, /* 30 */ + { SHIFT_AND_ROT, COSTS_N_INSNS (2) } /* 31 */ + }, + { /* 3: -O2. */ + { SHIFT_MOVE, COSTS_N_INSNS (1) }, /* 0 */ + { SHIFT_INLINE, COSTS_N_INSNS (1) }, /* 1 */ + { SHIFT_INLINE, COSTS_N_INSNS (2) }, /* 2 */ + { SHIFT_INLINE, COSTS_N_INSNS (2) }, /* 3 */ + { SHIFT_INLINE, COSTS_N_INSNS (3) }, /* 4 */ + { SHIFT_INLINE, COSTS_N_INSNS (3) }, /* 5 */ + { SHIFT_INLINE, COSTS_N_INSNS (3) }, /* 6 */ + { SHIFT_INLINE, COSTS_N_INSNS (4) }, /* 7 */ + { SHIFT_INLINE, COSTS_N_INSNS (4) }, /* 8 */ + { SHIFT_INLINE, COSTS_N_INSNS (4) }, /* 9 */ + { SHIFT_INLINE, COSTS_N_INSNS (5) }, /* 10 */ + { SHIFT_INLINE, COSTS_N_INSNS (5) }, /* 11 */ + { SHIFT_INLINE, COSTS_N_INSNS (5) }, /* 12 */ + { SHIFT_INLINE, COSTS_N_INSNS (6) }, /* 13 */ + { SHIFT_INLINE, COSTS_N_INSNS (6) }, /* 14 */ + { SHIFT_INLINE, COSTS_N_INSNS (6) }, /* 15 */ + { SHIFT_INLINE, COSTS_N_INSNS (7) }, /* 16 */ + { SHIFT_INLINE, COSTS_N_INSNS (7) }, /* 17 */ + { SHIFT_INLINE, COSTS_N_INSNS (7) }, /* 18 */ + { SHIFT_INLINE, COSTS_N_INSNS (8) }, /* 19 */ + { SHIFT_INLINE, COSTS_N_INSNS (8) }, /* 20 */ + { SHIFT_INLINE, COSTS_N_INSNS (8) }, /* 21 */ + { SHIFT_INLINE, COSTS_N_INSNS (9) }, /* 22 */ + { SHIFT_INLINE, COSTS_N_INSNS (9) }, /* 23 */ + { SHIFT_AND_ROT, COSTS_N_INSNS (9) }, /* 24 */ + { SHIFT_AND_ROT, COSTS_N_INSNS (8) }, /* 25 */ + { SHIFT_AND_ROT, COSTS_N_INSNS (7) }, /* 26 */ + { SHIFT_AND_ROT, COSTS_N_INSNS (6) }, /* 27 */ + { SHIFT_AND_ROT, COSTS_N_INSNS (5) }, /* 28 */ + { SHIFT_AND_ROT, COSTS_N_INSNS (4) }, /* 29 */ + { SHIFT_AND_ROT, COSTS_N_INSNS (3) }, /* 30 */ + { SHIFT_AND_ROT, COSTS_N_INSNS (2) } /* 31 */ + }, + { /* 4: -O2 -mswap TARGET_V2. */ + { SHIFT_MOVE, COSTS_N_INSNS (1) }, /* 0 */ + { SHIFT_INLINE, COSTS_N_INSNS (1) }, /* 1 */ + { SHIFT_INLINE, COSTS_N_INSNS (2) }, /* 2 */ + { SHIFT_INLINE, COSTS_N_INSNS (2) }, /* 3 */ + { SHIFT_INLINE, COSTS_N_INSNS (3) }, /* 4 */ + { SHIFT_INLINE, COSTS_N_INSNS (3) }, /* 5 */ + { SHIFT_INLINE, COSTS_N_INSNS (3) }, /* 6 */ + { SHIFT_INLINE, COSTS_N_INSNS (4) }, /* 7 */ + { SHIFT_INLINE, COSTS_N_INSNS (4) }, /* 8 */ + { SHIFT_INLINE, COSTS_N_INSNS (4) }, /* 9 */ + { SHIFT_INLINE, COSTS_N_INSNS (5) }, /* 10 */ + { SHIFT_INLINE, COSTS_N_INSNS (5) }, /* 11 */ + { SHIFT_INLINE, COSTS_N_INSNS (5) }, /* 12 */ + { SHIFT_AND_SWAP_ROT, COSTS_N_INSNS (5) }, /* 13 */ + { SHIFT_AND_SWAP_ROT, COSTS_N_INSNS (4) }, /* 14 */ + { SHIFT_AND_SWAP_ROT, COSTS_N_INSNS (3) }, /* 15 */ + { SHIFT_SWAP, COSTS_N_INSNS (1) }, /* 16 */ + { SHIFT_SWAP, COSTS_N_INSNS (2) }, /* 17 */ + { SHIFT_SWAP, COSTS_N_INSNS (3) }, /* 18 */ + { SHIFT_SWAP, COSTS_N_INSNS (3) }, /* 19 */ + { SHIFT_SWAP, COSTS_N_INSNS (4) }, /* 20 */ + { SHIFT_SWAP, COSTS_N_INSNS (4) }, /* 21 */ + { SHIFT_SWAP, COSTS_N_INSNS (4) }, /* 22 */ + { SHIFT_SWAP, COSTS_N_INSNS (5) }, /* 23 */ + { SHIFT_SWAP, COSTS_N_INSNS (5) }, /* 24 */ + { SHIFT_SWAP, COSTS_N_INSNS (5) }, /* 25 */ + { SHIFT_SWAP, COSTS_N_INSNS (6) }, /* 26 */ + { SHIFT_AND_ROT, COSTS_N_INSNS (6) }, /* 27 */ + { SHIFT_AND_ROT, COSTS_N_INSNS (5) }, /* 28 */ + { SHIFT_AND_ROT, COSTS_N_INSNS (4) }, /* 29 */ + { SHIFT_AND_ROT, COSTS_N_INSNS (3) }, /* 30 */ + { SHIFT_AND_ROT, COSTS_N_INSNS (2) } /* 31 */ + }, + { /* 5: -O2 -mswap !TARGET_V2. */ + { SHIFT_MOVE, COSTS_N_INSNS (1) }, /* 0 */ + { SHIFT_INLINE, COSTS_N_INSNS (1) }, /* 1 */ + { SHIFT_INLINE, COSTS_N_INSNS (2) }, /* 2 */ + { SHIFT_INLINE, COSTS_N_INSNS (2) }, /* 3 */ + { SHIFT_INLINE, COSTS_N_INSNS (3) }, /* 4 */ + { SHIFT_INLINE, COSTS_N_INSNS (3) }, /* 5 */ + { SHIFT_INLINE, COSTS_N_INSNS (3) }, /* 6 */ + { SHIFT_INLINE, COSTS_N_INSNS (4) }, /* 7 */ + { SHIFT_INLINE, COSTS_N_INSNS (4) }, /* 8 */ + { SHIFT_INLINE, COSTS_N_INSNS (4) }, /* 9 */ + { SHIFT_INLINE, COSTS_N_INSNS (5) }, /* 10 */ + { SHIFT_INLINE, COSTS_N_INSNS (5) }, /* 11 */ + { SHIFT_INLINE, COSTS_N_INSNS (5) }, /* 12 */ + { SHIFT_AND_SWAP_ROT, COSTS_N_INSNS (5) }, /* 13 */ + { SHIFT_AND_SWAP_ROT, COSTS_N_INSNS (4) }, /* 14 */ + { SHIFT_AND_SWAP_ROT, COSTS_N_INSNS (3) }, /* 15 */ + { SHIFT_SWAP, COSTS_N_INSNS (2) }, /* 16 */ + { SHIFT_SWAP, COSTS_N_INSNS (3) }, /* 17 */ + { SHIFT_SWAP, COSTS_N_INSNS (4) }, /* 18 */ + { SHIFT_SWAP, COSTS_N_INSNS (4) }, /* 19 */ + { SHIFT_SWAP, COSTS_N_INSNS (5) }, /* 20 */ + { SHIFT_SWAP, COSTS_N_INSNS (5) }, /* 21 */ + { SHIFT_SWAP, COSTS_N_INSNS (5) }, /* 22 */ + { SHIFT_SWAP, COSTS_N_INSNS (6) }, /* 23 */ + { SHIFT_SWAP, COSTS_N_INSNS (6) }, /* 24 */ + { SHIFT_SWAP, COSTS_N_INSNS (6) }, /* 25 */ + { SHIFT_AND_ROT, COSTS_N_INSNS (7) }, /* 26 */ + { SHIFT_AND_ROT, COSTS_N_INSNS (6) }, /* 27 */ + { SHIFT_AND_ROT, COSTS_N_INSNS (5) }, /* 28 */ + { SHIFT_AND_ROT, COSTS_N_INSNS (4) }, /* 29 */ + { SHIFT_AND_ROT, COSTS_N_INSNS (3) }, /* 30 */ + { SHIFT_AND_ROT, COSTS_N_INSNS (2) } /* 31 */ + } +}; /* Split SImode left shift instruction. */ void @@ -4230,11 +4477,29 @@ arc_split_ashl (rtx *operands) if (CONST_INT_P (operands[2])) { int n = INTVAL (operands[2]) & 0x1f; - if (n <= 9) + switch (arc_ashl_alg [arc_shift_context_idx ()][n].alg) { + case SHIFT_MOVE: + emit_move_insn (operands[0], operands[1]); + return; + + case SHIFT_SWAP: + if (!TARGET_V2) + { + emit_insn (gen_andsi3_i (operands[0], operands[1], + GEN_INT (0xffff))); + emit_insn (gen_rotrsi2_cnt16 (operands[0], operands[0])); + } + else + emit_insn (gen_ashlsi2_cnt16 (operands[0], operands[1])); + n -= 16; if (n == 0) - emit_move_insn (operands[0], operands[1]); - else if (n <= 2) + return; + operands[1] = operands[0]; + /* FALL THRU */ + + case SHIFT_INLINE: + if (n <= 2) { emit_insn (gen_ashlsi3_cnt1 (operands[0], operands[1])); if (n == 2) @@ -4256,37 +4521,27 @@ arc_split_ashl (rtx *operands) emit_insn (gen_ashlsi3_cnt1 (operands[0], operands[0])); } return; - } - else if (n >= 16 && n <= 22 && TARGET_SWAP && TARGET_V2) - { - emit_insn (gen_ashlsi2_cnt16 (operands[0], operands[1])); - if (n > 16) - { - operands[1] = operands[0]; - operands[2] = GEN_INT (n - 16); - arc_split_ashl (operands); - } + + case SHIFT_AND_ROT: + emit_insn (gen_andsi3_i (operands[0], operands[1], + GEN_INT ((1 << (32 - n)) - 1))); + for (; n < 32; n++) + emit_insn (gen_rotrsi3_cnt1 (operands[0], operands[0])); return; - } - else if (n >= 29) - { - if (n < 31) - { - if (n == 29) - { - emit_insn (gen_andsi3_i (operands[0], operands[1], - GEN_INT (7))); - emit_insn (gen_rotrsi3_cnt1 (operands[0], operands[0])); - } - else - emit_insn (gen_andsi3_i (operands[0], operands[1], - GEN_INT (3))); - emit_insn (gen_rotrsi3_cnt1 (operands[0], operands[0])); - } - else - emit_insn (gen_andsi3_i (operands[0], operands[1], const1_rtx)); - emit_insn (gen_rotrsi3_cnt1 (operands[0], operands[0])); + + case SHIFT_AND_SWAP_ROT: + emit_insn (gen_andsi3_i (operands[0], operands[1], + GEN_INT ((1 << (32 - n)) - 1))); + emit_insn (gen_rotrsi2_cnt16 (operands[0], operands[0])); + for (; n < 16; n++) + emit_insn (gen_rotrsi3_cnt1 (operands[0], operands[0])); return; + + case SHIFT_LOOP: + break; + + default: + gcc_unreachable (); } } @@ -5568,6 +5823,37 @@ arc_rtx_costs (rtx x, machine_mode mode, int outer_code, If we need more than 12 insns to do a multiply, then go out-of-line, since the call overhead will be < 10% of the cost of the multiply. */ case ASHIFT: + if (mode == DImode) + { + if (XEXP (x, 1) == const1_rtx) + { + *total += rtx_cost (XEXP (x, 0), mode, ASHIFT, 0, speed) + + COSTS_N_INSNS (2); + return true; + } + return false; + } + if (TARGET_BARREL_SHIFTER) + { + *total = COSTS_N_INSNS (1); + if (CONST_INT_P (XEXP (x, 1))) + { + *total += rtx_cost (XEXP (x, 0), mode, ASHIFT, 0, speed); + return true; + } + } + else if (CONST_INT_P (XEXP (x, 1))) + { + unsigned int n = INTVAL (XEXP (x, 1)) & 0x1f; + *total = arc_ashl_alg[arc_shift_context_idx ()][n].cost + + rtx_cost (XEXP (x, 0), mode, ASHIFT, 0, speed); + return true; + } + else + /* Variable shift loop takes 2 * n + 2 cycles. */ + *total = speed ? COSTS_N_INSNS (64) : COSTS_N_INSNS (4); + return false; + case ASHIFTRT: case LSHIFTRT: case ROTATE: |