diff options
| author | Max Filippov <jcmvbkbc@gmail.com> | 2011-09-06 03:55:28 +0400 |
|---|---|---|
| committer | Blue Swirl <blauwirbel@gmail.com> | 2011-09-10 16:57:36 +0000 |
| commit | 67882fd177389527510eb36b3f7712011a835545 (patch) | |
| tree | ccb0d63c91500dff050c1e505ee4e8336407a3e1 /target-xtensa | |
| parent | dedc5eae2324b3c4a6d25af2138396aa5dc3d9e0 (diff) | |
target-xtensa: implement narrow instructions
Instructions with op0 >= 8 are 2 bytes long, others are 3 bytes long.
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 | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/target-xtensa/translate.c b/target-xtensa/translate.c index 0524dc7f52..4dfca2bcf8 100644 --- a/target-xtensa/translate.c +++ b/target-xtensa/translate.c @@ -106,6 +106,11 @@ static void gen_jump_slot(DisasContext *dc, TCGv dest, int slot) dc->is_jmp = DISAS_UPDATE; } +static void gen_jump(DisasContext *dc, TCGv dest) +{ + gen_jump_slot(dc, dest, -1); +} + static void gen_jumpi(DisasContext *dc, uint32_t dest, int slot) { TCGv_i32 tmp = tcg_const_i32(dest); @@ -377,22 +382,71 @@ static void disas_xtensa_insn(DisasContext *dc) case 7: /*B*/ break; +#define gen_narrow_load_store(type) do { \ + TCGv_i32 addr = tcg_temp_new_i32(); \ + tcg_gen_addi_i32(addr, cpu_R[RRRN_S], RRRN_R << 2); \ + tcg_gen_qemu_##type(cpu_R[RRRN_T], addr, 0); \ + tcg_temp_free(addr); \ + } while (0) + case 8: /*L32I.Nn*/ + gen_narrow_load_store(ld32u); break; case 9: /*S32I.Nn*/ + gen_narrow_load_store(st32); break; +#undef gen_narrow_load_store case 10: /*ADD.Nn*/ + tcg_gen_add_i32(cpu_R[RRRN_R], cpu_R[RRRN_S], cpu_R[RRRN_T]); break; case 11: /*ADDI.Nn*/ + tcg_gen_addi_i32(cpu_R[RRRN_R], cpu_R[RRRN_S], RRRN_T ? RRRN_T : -1); break; case 12: /*ST2n*/ + if (RRRN_T < 8) { /*MOVI.Nn*/ + tcg_gen_movi_i32(cpu_R[RRRN_S], + RRRN_R | (RRRN_T << 4) | + ((RRRN_T & 6) == 6 ? 0xffffff80 : 0)); + } else { /*BEQZ.Nn*/ /*BNEZ.Nn*/ + } break; case 13: /*ST3n*/ + switch (RRRN_R) { + case 0: /*MOV.Nn*/ + tcg_gen_mov_i32(cpu_R[RRRN_T], cpu_R[RRRN_S]); + break; + + case 15: /*S3*/ + switch (RRRN_T) { + case 0: /*RET.Nn*/ + gen_jump(dc, cpu_R[0]); + break; + + case 1: /*RETW.Nn*/ + break; + + case 2: /*BREAK.Nn*/ + break; + + case 3: /*NOP.Nn*/ + break; + + case 6: /*ILL.Nn*/ + break; + + default: /*reserved*/ + break; + } + break; + + default: /*reserved*/ + break; + } break; default: /*reserved*/ |