diff options
| author | Max Filippov <jcmvbkbc@gmail.com> | 2011-09-06 03:55:42 +0400 |
|---|---|---|
| committer | Blue Swirl <blauwirbel@gmail.com> | 2011-09-10 16:57:38 +0000 |
| commit | f76ebf55cd971c82e867fea97741e48d2f14499d (patch) | |
| tree | 93a1d525afde445913c2cc94b931d88235717849 /target-xtensa | |
| parent | 40643d7c0fe4dc967ebc2f75e6758a4649776949 (diff) | |
target-xtensa: implement RST2 group (32 bit mul/div/rem)
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 | 77 |
1 files changed, 76 insertions, 1 deletions
diff --git a/target-xtensa/translate.c b/target-xtensa/translate.c index dccd453512..bc04a108b9 100644 --- a/target-xtensa/translate.c +++ b/target-xtensa/translate.c @@ -878,7 +878,82 @@ static void disas_xtensa_insn(DisasContext *dc) break; case 2: /*RST2*/ - TBD(); + if (OP2 >= 12) { + HAS_OPTION(XTENSA_OPTION_32_BIT_IDIV); + int label = gen_new_label(); + tcg_gen_brcondi_i32(TCG_COND_NE, cpu_R[RRR_T], 0, label); + gen_exception_cause(dc, INTEGER_DIVIDE_BY_ZERO_CAUSE); + gen_set_label(label); + } + + switch (OP2) { + case 8: /*MULLi*/ + HAS_OPTION(XTENSA_OPTION_32_BIT_IMUL); + tcg_gen_mul_i32(cpu_R[RRR_R], cpu_R[RRR_S], cpu_R[RRR_T]); + break; + + case 10: /*MULUHi*/ + case 11: /*MULSHi*/ + HAS_OPTION(XTENSA_OPTION_32_BIT_IMUL); + { + TCGv_i64 r = tcg_temp_new_i64(); + TCGv_i64 s = tcg_temp_new_i64(); + TCGv_i64 t = tcg_temp_new_i64(); + + if (OP2 == 10) { + tcg_gen_extu_i32_i64(s, cpu_R[RRR_S]); + tcg_gen_extu_i32_i64(t, cpu_R[RRR_T]); + } else { + tcg_gen_ext_i32_i64(s, cpu_R[RRR_S]); + tcg_gen_ext_i32_i64(t, cpu_R[RRR_T]); + } + tcg_gen_mul_i64(r, s, t); + tcg_gen_shri_i64(r, r, 32); + tcg_gen_trunc_i64_i32(cpu_R[RRR_R], r); + + tcg_temp_free_i64(r); + tcg_temp_free_i64(s); + tcg_temp_free_i64(t); + } + break; + + case 12: /*QUOUi*/ + tcg_gen_divu_i32(cpu_R[RRR_R], cpu_R[RRR_S], cpu_R[RRR_T]); + break; + + case 13: /*QUOSi*/ + case 15: /*REMSi*/ + { + int label1 = gen_new_label(); + int label2 = gen_new_label(); + + tcg_gen_brcondi_i32(TCG_COND_NE, cpu_R[RRR_S], 0x80000000, + label1); + tcg_gen_brcondi_i32(TCG_COND_NE, cpu_R[RRR_T], 0xffffffff, + label1); + tcg_gen_movi_i32(cpu_R[RRR_R], + OP2 == 13 ? 0x80000000 : 0); + tcg_gen_br(label2); + gen_set_label(label1); + if (OP2 == 13) { + tcg_gen_div_i32(cpu_R[RRR_R], + cpu_R[RRR_S], cpu_R[RRR_T]); + } else { + tcg_gen_rem_i32(cpu_R[RRR_R], + cpu_R[RRR_S], cpu_R[RRR_T]); + } + gen_set_label(label2); + } + break; + + case 14: /*REMUi*/ + tcg_gen_remu_i32(cpu_R[RRR_R], cpu_R[RRR_S], cpu_R[RRR_T]); + break; + + default: /*reserved*/ + RESERVED(); + break; + } break; case 3: /*RST3*/ |