From 2b836c2ac1d040bbe2e47fd000924083fbcef414 Mon Sep 17 00:00:00 2001 From: Richard Henderson Date: Sun, 13 Jun 2021 14:58:05 -0700 Subject: tcg: Add flags argument to tcg_gen_bswap16_*, tcg_gen_bswap32_i64 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Implement the new semantics in the fallback expansion. Change all callers to supply the flags that keep the semantics unchanged locally. Reviewed-by: Peter Maydell Reviewed-by: Philippe Mathieu-Daudé Signed-off-by: Richard Henderson --- tcg/tcg-op.c | 123 ++++++++++++++++++++++++++++++++++++++++------------------- 1 file changed, 83 insertions(+), 40 deletions(-) (limited to 'tcg') diff --git a/tcg/tcg-op.c b/tcg/tcg-op.c index dc65577..949cbf2 100644 --- a/tcg/tcg-op.c +++ b/tcg/tcg-op.c @@ -1001,20 +1001,35 @@ void tcg_gen_ext16u_i32(TCGv_i32 ret, TCGv_i32 arg) } } -/* Note: we assume the two high bytes are set to zero */ -void tcg_gen_bswap16_i32(TCGv_i32 ret, TCGv_i32 arg) +void tcg_gen_bswap16_i32(TCGv_i32 ret, TCGv_i32 arg, int flags) { + /* Only one extension flag may be present. */ + tcg_debug_assert(!(flags & TCG_BSWAP_OS) || !(flags & TCG_BSWAP_OZ)); + if (TCG_TARGET_HAS_bswap16_i32) { - tcg_gen_op3i_i32(INDEX_op_bswap16_i32, ret, arg, - TCG_BSWAP_IZ | TCG_BSWAP_OZ); + tcg_gen_op3i_i32(INDEX_op_bswap16_i32, ret, arg, flags); } else { TCGv_i32 t0 = tcg_temp_new_i32(); + TCGv_i32 t1 = tcg_temp_new_i32(); + + tcg_gen_shri_i32(t0, arg, 8); + if (!(flags & TCG_BSWAP_IZ)) { + tcg_gen_ext8u_i32(t0, t0); + } - tcg_gen_ext8u_i32(t0, arg); - tcg_gen_shli_i32(t0, t0, 8); - tcg_gen_shri_i32(ret, arg, 8); - tcg_gen_or_i32(ret, ret, t0); + if (flags & TCG_BSWAP_OS) { + tcg_gen_shli_i32(t1, arg, 24); + tcg_gen_sari_i32(t1, t1, 16); + } else if (flags & TCG_BSWAP_OZ) { + tcg_gen_ext8u_i32(t1, arg); + tcg_gen_shli_i32(t1, t1, 8); + } else { + tcg_gen_shli_i32(t1, arg, 8); + } + + tcg_gen_or_i32(ret, t0, t1); tcg_temp_free_i32(t0); + tcg_temp_free_i32(t1); } } @@ -1655,51 +1670,79 @@ void tcg_gen_ext32u_i64(TCGv_i64 ret, TCGv_i64 arg) } } -/* Note: we assume the six high bytes are set to zero */ -void tcg_gen_bswap16_i64(TCGv_i64 ret, TCGv_i64 arg) +void tcg_gen_bswap16_i64(TCGv_i64 ret, TCGv_i64 arg, int flags) { + /* Only one extension flag may be present. */ + tcg_debug_assert(!(flags & TCG_BSWAP_OS) || !(flags & TCG_BSWAP_OZ)); + if (TCG_TARGET_REG_BITS == 32) { - tcg_gen_bswap16_i32(TCGV_LOW(ret), TCGV_LOW(arg)); - tcg_gen_movi_i32(TCGV_HIGH(ret), 0); + tcg_gen_bswap16_i32(TCGV_LOW(ret), TCGV_LOW(arg), flags); + if (flags & TCG_BSWAP_OS) { + tcg_gen_sari_i32(TCGV_HIGH(ret), TCGV_LOW(ret), 31); + } else { + tcg_gen_movi_i32(TCGV_HIGH(ret), 0); + } } else if (TCG_TARGET_HAS_bswap16_i64) { - tcg_gen_op3i_i64(INDEX_op_bswap16_i64, ret, arg, - TCG_BSWAP_IZ | TCG_BSWAP_OZ); + tcg_gen_op3i_i64(INDEX_op_bswap16_i64, ret, arg, flags); } else { TCGv_i64 t0 = tcg_temp_new_i64(); + TCGv_i64 t1 = tcg_temp_new_i64(); - tcg_gen_ext8u_i64(t0, arg); - tcg_gen_shli_i64(t0, t0, 8); - tcg_gen_shri_i64(ret, arg, 8); - tcg_gen_or_i64(ret, ret, t0); + tcg_gen_shri_i64(t0, arg, 8); + if (!(flags & TCG_BSWAP_IZ)) { + tcg_gen_ext8u_i64(t0, t0); + } + + if (flags & TCG_BSWAP_OS) { + tcg_gen_shli_i64(t1, arg, 56); + tcg_gen_sari_i64(t1, t1, 48); + } else if (flags & TCG_BSWAP_OZ) { + tcg_gen_ext8u_i64(t1, arg); + tcg_gen_shli_i64(t1, t1, 8); + } else { + tcg_gen_shli_i64(t1, arg, 8); + } + + tcg_gen_or_i64(ret, t0, t1); tcg_temp_free_i64(t0); + tcg_temp_free_i64(t1); } } -/* Note: we assume the four high bytes are set to zero */ -void tcg_gen_bswap32_i64(TCGv_i64 ret, TCGv_i64 arg) +void tcg_gen_bswap32_i64(TCGv_i64 ret, TCGv_i64 arg, int flags) { + /* Only one extension flag may be present. */ + tcg_debug_assert(!(flags & TCG_BSWAP_OS) || !(flags & TCG_BSWAP_OZ)); + if (TCG_TARGET_REG_BITS == 32) { tcg_gen_bswap32_i32(TCGV_LOW(ret), TCGV_LOW(arg)); - tcg_gen_movi_i32(TCGV_HIGH(ret), 0); + if (flags & TCG_BSWAP_OS) { + tcg_gen_sari_i32(TCGV_HIGH(ret), TCGV_LOW(ret), 31); + } else { + tcg_gen_movi_i32(TCGV_HIGH(ret), 0); + } } else if (TCG_TARGET_HAS_bswap32_i64) { - tcg_gen_op3i_i64(INDEX_op_bswap32_i64, ret, arg, - TCG_BSWAP_IZ | TCG_BSWAP_OZ); + tcg_gen_op3i_i64(INDEX_op_bswap32_i64, ret, arg, flags); } else { TCGv_i64 t0 = tcg_temp_new_i64(); TCGv_i64 t1 = tcg_temp_new_i64(); TCGv_i64 t2 = tcg_constant_i64(0x00ff00ff); - /* arg = ....abcd */ - tcg_gen_shri_i64(t0, arg, 8); /* t0 = .....abc */ - tcg_gen_and_i64(t1, arg, t2); /* t1 = .....b.d */ - tcg_gen_and_i64(t0, t0, t2); /* t0 = .....a.c */ - tcg_gen_shli_i64(t1, t1, 8); /* t1 = ....b.d. */ - tcg_gen_or_i64(ret, t0, t1); /* ret = ....badc */ - - tcg_gen_shli_i64(t1, ret, 48); /* t1 = dc...... */ - tcg_gen_shri_i64(t0, ret, 16); /* t0 = ......ba */ - tcg_gen_shri_i64(t1, t1, 32); /* t1 = ....dc.. */ - tcg_gen_or_i64(ret, t0, t1); /* ret = ....dcba */ + /* arg = xxxxabcd */ + tcg_gen_shri_i64(t0, arg, 8); /* t0 = .xxxxabc */ + tcg_gen_and_i64(t1, arg, t2); /* t1 = .....b.d */ + tcg_gen_and_i64(t0, t0, t2); /* t0 = .....a.c */ + tcg_gen_shli_i64(t1, t1, 8); /* t1 = ....b.d. */ + tcg_gen_or_i64(ret, t0, t1); /* ret = ....badc */ + + tcg_gen_shli_i64(t1, ret, 48); /* t1 = dc...... */ + tcg_gen_shri_i64(t0, ret, 16); /* t0 = ......ba */ + if (flags & TCG_BSWAP_OS) { + tcg_gen_sari_i64(t1, t1, 32); /* t1 = ssssdc.. */ + } else { + tcg_gen_shri_i64(t1, t1, 32); /* t1 = ....dc.. */ + } + tcg_gen_or_i64(ret, t0, t1); /* ret = ssssdcba */ tcg_temp_free_i64(t0); tcg_temp_free_i64(t1); @@ -2846,7 +2889,7 @@ 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_gen_bswap16_i32(val, val, TCG_BSWAP_IZ | TCG_BSWAP_OZ); if (orig_memop & MO_SIGN) { tcg_gen_ext16s_i32(val, val); } @@ -2874,7 +2917,7 @@ void tcg_gen_qemu_st_i32(TCGv_i32 val, TCGv addr, TCGArg idx, MemOp memop) switch (memop & MO_SIZE) { case MO_16: tcg_gen_ext16u_i32(swap, val); - tcg_gen_bswap16_i32(swap, swap); + tcg_gen_bswap16_i32(swap, swap, TCG_BSWAP_IZ | TCG_BSWAP_OZ); break; case MO_32: tcg_gen_bswap32_i32(swap, val); @@ -2935,13 +2978,13 @@ void tcg_gen_qemu_ld_i64(TCGv_i64 val, TCGv addr, TCGArg idx, MemOp memop) if ((orig_memop ^ memop) & MO_BSWAP) { switch (orig_memop & MO_SIZE) { case MO_16: - tcg_gen_bswap16_i64(val, val); + tcg_gen_bswap16_i64(val, val, TCG_BSWAP_IZ | TCG_BSWAP_OZ); if (orig_memop & MO_SIGN) { tcg_gen_ext16s_i64(val, val); } break; case MO_32: - tcg_gen_bswap32_i64(val, val); + tcg_gen_bswap32_i64(val, val, TCG_BSWAP_IZ | TCG_BSWAP_OZ); if (orig_memop & MO_SIGN) { tcg_gen_ext32s_i64(val, val); } @@ -2975,11 +3018,11 @@ void tcg_gen_qemu_st_i64(TCGv_i64 val, TCGv addr, TCGArg idx, MemOp memop) switch (memop & MO_SIZE) { case MO_16: tcg_gen_ext16u_i64(swap, val); - tcg_gen_bswap16_i64(swap, swap); + tcg_gen_bswap16_i64(swap, swap, TCG_BSWAP_IZ | TCG_BSWAP_OZ); break; case MO_32: tcg_gen_ext32u_i64(swap, val); - tcg_gen_bswap32_i64(swap, swap); + tcg_gen_bswap32_i64(swap, swap, TCG_BSWAP_IZ | TCG_BSWAP_OZ); break; case MO_64: tcg_gen_bswap64_i64(swap, val); -- cgit v1.1