diff options
| author | Chen Gang <gang.chen.5i5j@gmail.com> | 2015-10-20 23:19:02 +0800 |
|---|---|---|
| committer | Richard Henderson <rth@twiddle.net> | 2015-10-22 07:51:49 -1000 |
| commit | 2a080ce26682f35517b0e20f4ad10559e9270b5d (patch) | |
| tree | 3d01b81d92f303e861f8070158dc9d731c76bc0b /target-tilegx/translate.c | |
| parent | b803894e2c4d744ccc113ca6cbe6654ec80c1dc6 (diff) | |
| download | qemu-2a080ce26682f35517b0e20f4ad10559e9270b5d.zip | |
target-tilegx: Implement prefetch instructions in pipe y2
Originally, tilegx qemu only implement prefetch instructions in pipe x1,
did not implement them in pipe y2.
Signed-off-by: Chen Gang <gang.chen.5i5j@gmail.com>
Signed-off-by: Richard Henderson <rth@twiddle.net>
Diffstat (limited to 'target-tilegx/translate.c')
| -rw-r--r-- | target-tilegx/translate.c | 22 |
1 files changed, 14 insertions, 8 deletions
diff --git a/target-tilegx/translate.c b/target-tilegx/translate.c index 34d45f87b9..354f25a52b 100644 --- a/target-tilegx/translate.c +++ b/target-tilegx/translate.c @@ -2105,38 +2105,44 @@ static TileExcp decode_y2(DisasContext *dc, tilegx_bundle_bits bundle) unsigned srcbdest = get_SrcBDest_Y2(bundle); const char *mnemonic; TCGMemOp memop; + bool prefetch_nofault = false; switch (OEY2(opc, mode)) { case OEY2(LD1S_OPCODE_Y2, MODE_OPCODE_YA2): memop = MO_SB; - mnemonic = "ld1s"; + mnemonic = "ld1s"; /* prefetch_l1_fault */ goto do_load; case OEY2(LD1U_OPCODE_Y2, MODE_OPCODE_YA2): memop = MO_UB; - mnemonic = "ld1u"; + mnemonic = "ld1u"; /* prefetch, prefetch_l1 */ + prefetch_nofault = (srcbdest == TILEGX_R_ZERO); goto do_load; case OEY2(LD2S_OPCODE_Y2, MODE_OPCODE_YA2): memop = MO_TESW; - mnemonic = "ld2s"; + mnemonic = "ld2s"; /* prefetch_l2_fault */ goto do_load; case OEY2(LD2U_OPCODE_Y2, MODE_OPCODE_YA2): memop = MO_TEUW; - mnemonic = "ld2u"; + mnemonic = "ld2u"; /* prefetch_l2 */ + prefetch_nofault = (srcbdest == TILEGX_R_ZERO); goto do_load; case OEY2(LD4S_OPCODE_Y2, MODE_OPCODE_YB2): memop = MO_TESL; - mnemonic = "ld4s"; + mnemonic = "ld4s"; /* prefetch_l3_fault */ goto do_load; case OEY2(LD4U_OPCODE_Y2, MODE_OPCODE_YB2): memop = MO_TEUL; - mnemonic = "ld4u"; + mnemonic = "ld4u"; /* prefetch_l3 */ + prefetch_nofault = (srcbdest == TILEGX_R_ZERO); goto do_load; case OEY2(LD_OPCODE_Y2, MODE_OPCODE_YB2): memop = MO_TEQ; mnemonic = "ld"; do_load: - tcg_gen_qemu_ld_tl(dest_gr(dc, srcbdest), load_gr(dc, srca), - dc->mmuidx, memop); + if (!prefetch_nofault) { + tcg_gen_qemu_ld_tl(dest_gr(dc, srcbdest), load_gr(dc, srca), + dc->mmuidx, memop); + } qemu_log_mask(CPU_LOG_TB_IN_ASM, "%s %s, %s", mnemonic, reg_names[srcbdest], reg_names[srca]); return TILEGX_EXCP_NONE; |