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| author | Claudio Fontana <claudio.fontana@linaro.org> | 2014-01-04 22:15:51 +0000 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2014-01-08 19:07:21 +0000 |
| commit | 513f1d762f12a4cfdb6cfd59db5f2fb434db60ec (patch) | |
| tree | 7caabf03348e5bc21a65ec31dfeb3523d050f6b7 | |
| parent | da7dafe7ee9372322f926834ca7c0532822ad415 (diff) | |
| download | qemu-513f1d762f12a4cfdb6cfd59db5f2fb434db60ec.zip qemu-513f1d762f12a4cfdb6cfd59db5f2fb434db60ec.tar.gz qemu-513f1d762f12a4cfdb6cfd59db5f2fb434db60ec.tar.bz2 | |
target-arm: A64: Add support for floating point conditional compare
This adds decoding support for C3.6.23 FP Conditional Compare.
Signed-off-by: Claudio Fontana <claudio.fontana@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
| -rw-r--r-- | target-arm/translate-a64.c | 35 |
1 files changed, 34 insertions, 1 deletions
diff --git a/target-arm/translate-a64.c b/target-arm/translate-a64.c index dc9cc14..44d8a09 100644 --- a/target-arm/translate-a64.c +++ b/target-arm/translate-a64.c @@ -3268,7 +3268,40 @@ static void disas_fp_compare(DisasContext *s, uint32_t insn) */ static void disas_fp_ccomp(DisasContext *s, uint32_t insn) { - unsupported_encoding(s, insn); + unsigned int mos, type, rm, cond, rn, op, nzcv; + TCGv_i64 tcg_flags; + int label_continue = -1; + + mos = extract32(insn, 29, 3); + type = extract32(insn, 22, 2); /* 0 = single, 1 = double */ + rm = extract32(insn, 16, 5); + cond = extract32(insn, 12, 4); + rn = extract32(insn, 5, 5); + op = extract32(insn, 4, 1); + nzcv = extract32(insn, 0, 4); + + if (mos || type > 1) { + unallocated_encoding(s); + return; + } + + if (cond < 0x0e) { /* not always */ + int label_match = gen_new_label(); + label_continue = gen_new_label(); + arm_gen_test_cc(cond, label_match); + /* nomatch: */ + tcg_flags = tcg_const_i64(nzcv << 28); + gen_set_nzcv(tcg_flags); + tcg_temp_free_i64(tcg_flags); + tcg_gen_br(label_continue); + gen_set_label(label_match); + } + + handle_fp_compare(s, type, rn, rm, false, op); + + if (cond < 0x0e) { + gen_set_label(label_continue); + } } /* C3.6.24 Floating point conditional select |