diff options
| -rw-r--r-- | tcg/optimize.c | 152 |
1 files changed, 81 insertions, 71 deletions
diff --git a/tcg/optimize.c b/tcg/optimize.c index 0a55352..38027dc 100644 --- a/tcg/optimize.c +++ b/tcg/optimize.c @@ -292,6 +292,82 @@ static TCGArg do_constant_folding(TCGOpcode op, TCGArg x, TCGArg y) return res; } +static bool do_constant_folding_cond_32(uint32_t x, uint32_t y, TCGCond c) +{ + switch (c) { + case TCG_COND_EQ: + return x == y; + case TCG_COND_NE: + return x != y; + case TCG_COND_LT: + return (int32_t)x < (int32_t)y; + case TCG_COND_GE: + return (int32_t)x >= (int32_t)y; + case TCG_COND_LE: + return (int32_t)x <= (int32_t)y; + case TCG_COND_GT: + return (int32_t)x > (int32_t)y; + case TCG_COND_LTU: + return x < y; + case TCG_COND_GEU: + return x >= y; + case TCG_COND_LEU: + return x <= y; + case TCG_COND_GTU: + return x > y; + default: + tcg_abort(); + } +} + +static bool do_constant_folding_cond_64(uint64_t x, uint64_t y, TCGCond c) +{ + switch (c) { + case TCG_COND_EQ: + return x == y; + case TCG_COND_NE: + return x != y; + case TCG_COND_LT: + return (int64_t)x < (int64_t)y; + case TCG_COND_GE: + return (int64_t)x >= (int64_t)y; + case TCG_COND_LE: + return (int64_t)x <= (int64_t)y; + case TCG_COND_GT: + return (int64_t)x > (int64_t)y; + case TCG_COND_LTU: + return x < y; + case TCG_COND_GEU: + return x >= y; + case TCG_COND_LEU: + return x <= y; + case TCG_COND_GTU: + return x > y; + default: + tcg_abort(); + } +} + +static bool do_constant_folding_cond_eq(TCGCond c) +{ + switch (c) { + case TCG_COND_GT: + case TCG_COND_LTU: + case TCG_COND_LT: + case TCG_COND_GTU: + case TCG_COND_NE: + return 0; + case TCG_COND_GE: + case TCG_COND_GEU: + case TCG_COND_LE: + case TCG_COND_LEU: + case TCG_COND_EQ: + return 1; + default: + tcg_abort(); + } +} + /* Return 2 if the condition can't be simplified, and the result of the condition (0 or 1) if it can */ static TCGArg do_constant_folding_cond(TCGOpcode op, TCGArg x, @@ -300,75 +376,14 @@ static TCGArg do_constant_folding_cond(TCGOpcode op, TCGArg x, if (temps[x].state == TCG_TEMP_CONST && temps[y].state == TCG_TEMP_CONST) { switch (op_bits(op)) { case 32: - switch (c) { - case TCG_COND_EQ: - return (uint32_t)temps[x].val == (uint32_t)temps[y].val; - case TCG_COND_NE: - return (uint32_t)temps[x].val != (uint32_t)temps[y].val; - case TCG_COND_LT: - return (int32_t)temps[x].val < (int32_t)temps[y].val; - case TCG_COND_GE: - return (int32_t)temps[x].val >= (int32_t)temps[y].val; - case TCG_COND_LE: - return (int32_t)temps[x].val <= (int32_t)temps[y].val; - case TCG_COND_GT: - return (int32_t)temps[x].val > (int32_t)temps[y].val; - case TCG_COND_LTU: - return (uint32_t)temps[x].val < (uint32_t)temps[y].val; - case TCG_COND_GEU: - return (uint32_t)temps[x].val >= (uint32_t)temps[y].val; - case TCG_COND_LEU: - return (uint32_t)temps[x].val <= (uint32_t)temps[y].val; - case TCG_COND_GTU: - return (uint32_t)temps[x].val > (uint32_t)temps[y].val; - default: - break; - } - break; + return do_constant_folding_cond_32(temps[x].val, temps[y].val, c); case 64: - switch (c) { - case TCG_COND_EQ: - return (uint64_t)temps[x].val == (uint64_t)temps[y].val; - case TCG_COND_NE: - return (uint64_t)temps[x].val != (uint64_t)temps[y].val; - case TCG_COND_LT: - return (int64_t)temps[x].val < (int64_t)temps[y].val; - case TCG_COND_GE: - return (int64_t)temps[x].val >= (int64_t)temps[y].val; - case TCG_COND_LE: - return (int64_t)temps[x].val <= (int64_t)temps[y].val; - case TCG_COND_GT: - return (int64_t)temps[x].val > (int64_t)temps[y].val; - case TCG_COND_LTU: - return (uint64_t)temps[x].val < (uint64_t)temps[y].val; - case TCG_COND_GEU: - return (uint64_t)temps[x].val >= (uint64_t)temps[y].val; - case TCG_COND_LEU: - return (uint64_t)temps[x].val <= (uint64_t)temps[y].val; - case TCG_COND_GTU: - return (uint64_t)temps[x].val > (uint64_t)temps[y].val; - default: - break; - } - break; - } - } else if (temps_are_copies(x, y)) { - switch (c) { - case TCG_COND_GT: - case TCG_COND_LTU: - case TCG_COND_LT: - case TCG_COND_GTU: - case TCG_COND_NE: - return 0; - case TCG_COND_GE: - case TCG_COND_GEU: - case TCG_COND_LE: - case TCG_COND_LEU: - case TCG_COND_EQ: - return 1; + return do_constant_folding_cond_64(temps[x].val, temps[y].val, c); default: - break; + tcg_abort(); } + } else if (temps_are_copies(x, y)) { + return do_constant_folding_cond_eq(c); } else if (temps[y].state == TCG_TEMP_CONST && temps[y].val == 0) { switch (c) { case TCG_COND_LTU: @@ -381,11 +396,6 @@ static TCGArg do_constant_folding_cond(TCGOpcode op, TCGArg x, } else { return 2; } - - fprintf(stderr, - "Unrecognized bitness %d or condition %d in " - "do_constant_folding_cond.\n", op_bits(op), c); - tcg_abort(); } static bool swap_commutative(TCGArg dest, TCGArg *p1, TCGArg *p2) |