diff options
| -rw-r--r-- | gcc/config/xtensa/xtensa.cc | 58 |
1 files changed, 29 insertions, 29 deletions
diff --git a/gcc/config/xtensa/xtensa.cc b/gcc/config/xtensa/xtensa.cc index 13f2b2b..9433745 100644 --- a/gcc/config/xtensa/xtensa.cc +++ b/gcc/config/xtensa/xtensa.cc @@ -1035,35 +1035,35 @@ xtensa_split_operand_pair (rtx operands[4], machine_mode mode) load-immediate / arithmetic ones, instead of a L32R instruction (plus a constant in litpool). */ -static void -xtensa_emit_constantsynth (rtx dst, enum rtx_code code, - HOST_WIDE_INT imm0, HOST_WIDE_INT imm1, - rtx (*gen_op)(rtx, HOST_WIDE_INT), - HOST_WIDE_INT imm2) -{ - gcc_assert (REG_P (dst)); - emit_move_insn (dst, GEN_INT (imm0)); - emit_move_insn (dst, gen_rtx_fmt_ee (code, SImode, - dst, GEN_INT (imm1))); - if (gen_op) - emit_move_insn (dst, gen_op (dst, imm2)); -} - static int xtensa_constantsynth_2insn (rtx dst, HOST_WIDE_INT srcval, rtx (*gen_op)(rtx, HOST_WIDE_INT), HOST_WIDE_INT op_imm) { - int shift = exact_log2 (srcval + 1); + HOST_WIDE_INT imm = INT_MAX; + rtx x = NULL_RTX; + int shift; + gcc_assert (REG_P (dst)); + + shift = exact_log2 (srcval + 1); if (IN_RANGE (shift, 1, 31)) { - xtensa_emit_constantsynth (dst, LSHIFTRT, -1, 32 - shift, - gen_op, op_imm); - return 1; + imm = -1; + x = gen_lshrsi3 (dst, dst, GEN_INT (32 - shift)); } - if (IN_RANGE (srcval, (-2048 - 32768), (2047 + 32512))) + + shift = ctz_hwi (srcval); + if ((!x || (TARGET_DENSITY && ! IN_RANGE (imm, -32, 95))) + && xtensa_simm12b (srcval >> shift)) + { + imm = srcval >> shift; + x = gen_ashlsi3 (dst, dst, GEN_INT (shift)); + } + + if ((!x || (TARGET_DENSITY && ! IN_RANGE (imm, -32, 95))) + && IN_RANGE (srcval, (-2048 - 32768), (2047 + 32512))) { HOST_WIDE_INT imm0, imm1; @@ -1076,19 +1076,19 @@ xtensa_constantsynth_2insn (rtx dst, HOST_WIDE_INT srcval, imm0 = srcval - imm1; if (TARGET_DENSITY && imm1 < 32512 && IN_RANGE (imm0, 224, 255)) imm0 -= 256, imm1 += 256; - xtensa_emit_constantsynth (dst, PLUS, imm0, imm1, gen_op, op_imm); - return 1; + imm = imm0; + x = gen_addsi3 (dst, dst, GEN_INT (imm1)); } - shift = ctz_hwi (srcval); - if (xtensa_simm12b (srcval >> shift)) - { - xtensa_emit_constantsynth (dst, ASHIFT, srcval >> shift, shift, - gen_op, op_imm); - return 1; - } + if (!x) + return 0; - return 0; + emit_move_insn (dst, GEN_INT (imm)); + emit_insn (x); + if (gen_op) + emit_move_insn (dst, gen_op (dst, op_imm)); + + return 1; } static rtx |