diff options
Diffstat (limited to 'tcg/tcg-op.c')
| -rw-r--r-- | tcg/tcg-op.c | 24 |
1 files changed, 10 insertions, 14 deletions
diff --git a/tcg/tcg-op.c b/tcg/tcg-op.c index 949cbf2..0eac2d1 100644 --- a/tcg/tcg-op.c +++ b/tcg/tcg-op.c @@ -2876,7 +2876,7 @@ void tcg_gen_qemu_ld_i32(TCGv_i32 val, TCGv addr, TCGArg idx, MemOp memop) orig_memop = memop; if (!TCG_TARGET_HAS_MEMORY_BSWAP && (memop & MO_BSWAP)) { memop &= ~MO_BSWAP; - /* The bswap primitive requires zero-extended input. */ + /* The bswap primitive benefits from zero-extended input. */ if ((memop & MO_SSIZE) == MO_SW) { memop &= ~MO_SIGN; } @@ -2889,10 +2889,9 @@ void tcg_gen_qemu_ld_i32(TCGv_i32 val, TCGv addr, TCGArg idx, MemOp memop) if ((orig_memop ^ memop) & MO_BSWAP) { switch (orig_memop & MO_SIZE) { case MO_16: - tcg_gen_bswap16_i32(val, val, TCG_BSWAP_IZ | TCG_BSWAP_OZ); - if (orig_memop & MO_SIGN) { - tcg_gen_ext16s_i32(val, val); - } + tcg_gen_bswap16_i32(val, val, (orig_memop & MO_SIGN + ? TCG_BSWAP_IZ | TCG_BSWAP_OS + : TCG_BSWAP_IZ | TCG_BSWAP_OZ)); break; case MO_32: tcg_gen_bswap32_i32(val, val); @@ -2965,7 +2964,7 @@ void tcg_gen_qemu_ld_i64(TCGv_i64 val, TCGv addr, TCGArg idx, MemOp memop) orig_memop = memop; if (!TCG_TARGET_HAS_MEMORY_BSWAP && (memop & MO_BSWAP)) { memop &= ~MO_BSWAP; - /* The bswap primitive requires zero-extended input. */ + /* The bswap primitive benefits from zero-extended input. */ if ((memop & MO_SIGN) && (memop & MO_SIZE) < MO_64) { memop &= ~MO_SIGN; } @@ -2976,18 +2975,15 @@ void tcg_gen_qemu_ld_i64(TCGv_i64 val, TCGv addr, TCGArg idx, MemOp memop) plugin_gen_mem_callbacks(addr, info); if ((orig_memop ^ memop) & MO_BSWAP) { + int flags = (orig_memop & MO_SIGN + ? TCG_BSWAP_IZ | TCG_BSWAP_OS + : TCG_BSWAP_IZ | TCG_BSWAP_OZ); switch (orig_memop & MO_SIZE) { case MO_16: - tcg_gen_bswap16_i64(val, val, TCG_BSWAP_IZ | TCG_BSWAP_OZ); - if (orig_memop & MO_SIGN) { - tcg_gen_ext16s_i64(val, val); - } + tcg_gen_bswap16_i64(val, val, flags); break; case MO_32: - tcg_gen_bswap32_i64(val, val, TCG_BSWAP_IZ | TCG_BSWAP_OZ); - if (orig_memop & MO_SIGN) { - tcg_gen_ext32s_i64(val, val); - } + tcg_gen_bswap32_i64(val, val, flags); break; case MO_64: tcg_gen_bswap64_i64(val, val); |