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Prefetch in y2 pipe 

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Merge remote-tracking branch 'remotes/rth/tags/pull-tile-20151030' into staging

Prefetch in y2 pipe

# gpg: Signature made Fri 30 Oct 2015 20:40:02 GMT using RSA key ID 4DD0279B
# gpg: Good signature from "Richard Henderson <rth7680@gmail.com>"
# gpg:                 aka "Richard Henderson <rth@redhat.com>"
# gpg:                 aka "Richard Henderson <rth@twiddle.net>"

* remotes/rth/tags/pull-tile-20151030:
  target-tilegx: Implement prefetch instructions in pipe y2

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
master
Peter Maydell 2015-10-30 21:59:48 +00:00
parent 3a958f559e 2a080ce266
commit 24f4a0f5c9
1 changed files with 14 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
target-tilegx/translate.c
View File

@ -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;