diff options
| author | Max Filippov <jcmvbkbc@gmail.com> | 2012-07-17 23:45:23 +0400 |
|---|---|---|
| committer | Blue Swirl <blauwirbel@gmail.com> | 2012-07-28 09:06:40 +0000 |
| commit | 7ff7563fc1c3c57914aafec1753219604346fe18 (patch) | |
| tree | 311cbec827720856a26a40e396688e8a87911d1b /target-xtensa | |
| parent | d901eff3e6da96d34be33b307aa6cea75098c180 (diff) | |
target-xtensa: fix big-endian BBS/BBC implementation
Quote from ISA, 2.1:
For most Xtensa instructions, bit numbering is irrelevant; only the BBC
and BBS instructions assign bit numbers to values on which the processor
operates. The BBC/BBS instructions use big-endian bit ordering (0 is the
most-significant bit) on a big-endian processor configuration.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Diffstat (limited to 'target-xtensa')
| -rw-r--r-- | target-xtensa/translate.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/target-xtensa/translate.c b/target-xtensa/translate.c index b883e6bb72..1900bd5d44 100644 --- a/target-xtensa/translate.c +++ b/target-xtensa/translate.c @@ -2366,10 +2366,18 @@ static void disas_xtensa_insn(DisasContext *dc) case 5: /*BBC*/ /*BBS*/ gen_window_check2(dc, RRI8_S, RRI8_T); { - TCGv_i32 bit = tcg_const_i32(1); +#ifdef TARGET_WORDS_BIGENDIAN + TCGv_i32 bit = tcg_const_i32(0x80000000); +#else + TCGv_i32 bit = tcg_const_i32(0x00000001); +#endif TCGv_i32 tmp = tcg_temp_new_i32(); tcg_gen_andi_i32(tmp, cpu_R[RRI8_T], 0x1f); +#ifdef TARGET_WORDS_BIGENDIAN + tcg_gen_shr_i32(bit, bit, tmp); +#else tcg_gen_shl_i32(bit, bit, tmp); +#endif tcg_gen_and_i32(tmp, cpu_R[RRI8_S], bit); gen_brcondi(dc, eq_ne, tmp, 0, 4 + RRI8_IMM8_SE); tcg_temp_free(tmp); @@ -2383,7 +2391,11 @@ static void disas_xtensa_insn(DisasContext *dc) { TCGv_i32 tmp = tcg_temp_new_i32(); tcg_gen_andi_i32(tmp, cpu_R[RRI8_S], - 1 << (((RRI8_R & 1) << 4) | RRI8_T)); +#ifdef TARGET_WORDS_BIGENDIAN + 0x80000000 >> (((RRI8_R & 1) << 4) | RRI8_T)); +#else + 0x00000001 << (((RRI8_R & 1) << 4) | RRI8_T)); +#endif gen_brcondi(dc, eq_ne, tmp, 0, 4 + RRI8_IMM8_SE); tcg_temp_free(tmp); } |