>From 14fe2a651b3f5729f1d402dfcd6eb5f7da0f42b1 Mon Sep 17 00:00:00 2001 From: Chen Gang <gang.chen.5...@gmail.com> Date: Tue, 20 Oct 2015 23:19:02 +0800 Subject: [PATCH] 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.5...@gmail.com>
---
target-tilegx/translate.c | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/target-tilegx/translate.c b/target-tilegx/translate.c
index 34d45f8..b8ca401 100644
--- a/target-tilegx/translate.c
+++ b/target-tilegx/translate.c
@@ -2105,6 +2105,7 @@ 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):
@@ -2114,6 +2115,7 @@ static TileExcp decode_y2(DisasContext *dc,
tilegx_bundle_bits bundle)
case OEY2(LD1U_OPCODE_Y2, MODE_OPCODE_YA2):
memop = MO_UB;
mnemonic = "ld1u";
+ prefetch_nofault = (srcbdest == TILEGX_R_ZERO);
goto do_load;
case OEY2(LD2S_OPCODE_Y2, MODE_OPCODE_YA2):
memop = MO_TESW;
@@ -2122,6 +2124,7 @@ static TileExcp decode_y2(DisasContext *dc,
tilegx_bundle_bits bundle)
case OEY2(LD2U_OPCODE_Y2, MODE_OPCODE_YA2):
memop = MO_TEUW;
mnemonic = "ld2u";
+ prefetch_nofault = (srcbdest == TILEGX_R_ZERO);
goto do_load;
case OEY2(LD4S_OPCODE_Y2, MODE_OPCODE_YB2):
memop = MO_TESL;
@@ -2130,13 +2133,16 @@ static TileExcp decode_y2(DisasContext *dc,
tilegx_bundle_bits bundle)
case OEY2(LD4U_OPCODE_Y2, MODE_OPCODE_YB2):
memop = MO_TEUL;
mnemonic = "ld4u";
+ 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;
--
1.9.3
0001-target-tilegx-Implement-prefetch-instructions-in-pip.patch
Description: Binary data
