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[Qemu-devel] [PATCH v14 19/33] target-tilegx: Handle unconditional jump
From: |
Richard Henderson |
Subject: |
[Qemu-devel] [PATCH v14 19/33] target-tilegx: Handle unconditional jump instructions |
Date: |
Mon, 24 Aug 2015 09:17:45 -0700 |
Signed-off-by: Richard Henderson <address@hidden>
---
target-tilegx/translate.c | 58 +++++++++++++++++++++++++++++++++--------------
1 file changed, 41 insertions(+), 17 deletions(-)
diff --git a/target-tilegx/translate.c b/target-tilegx/translate.c
index 37c6ec5..11dcd45 100644
--- a/target-tilegx/translate.c
+++ b/target-tilegx/translate.c
@@ -242,7 +242,7 @@ static TileExcp gen_rr_opcode(DisasContext *dc, unsigned
opext,
const char *mnemonic;
TCGMemOp memop;
- /* Eliminate nops before doing anything else. */
+ /* Eliminate nops and jumps before doing anything else. */
switch (opext) {
case OE_RR_Y0(NOP):
case OE_RR_Y1(NOP):
@@ -261,6 +261,31 @@ static TileExcp gen_rr_opcode(DisasContext *dc, unsigned
opext,
}
qemu_log_mask(CPU_LOG_TB_IN_ASM, "%s", mnemonic);
return TILEGX_EXCP_NONE;
+
+ case OE_RR_X1(JRP):
+ case OE_RR_Y1(JRP):
+ mnemonic = "jrp";
+ goto do_jr;
+ case OE_RR_X1(JR):
+ case OE_RR_Y1(JR):
+ mnemonic = "jr";
+ goto do_jr;
+ case OE_RR_X1(JALRP):
+ case OE_RR_Y1(JALRP):
+ mnemonic = "jalrp";
+ goto do_jalr;
+ case OE_RR_X1(JALR):
+ case OE_RR_Y1(JALR):
+ mnemonic = "jalr";
+ do_jalr:
+ tcg_gen_movi_tl(dest_gr(dc, TILEGX_R_LR),
+ dc->pc + TILEGX_BUNDLE_SIZE_IN_BYTES);
+ do_jr:
+ dc->jmp.cond = TCG_COND_ALWAYS;
+ dc->jmp.dest = tcg_temp_new();
+ tcg_gen_andi_tl(dc->jmp.dest, load_gr(dc, srca), ~7);
+ qemu_log_mask(CPU_LOG_TB_IN_ASM, "%s %s", mnemonic, reg_names[srca]);
+ return TILEGX_EXCP_NONE;
}
tdest = dest_gr(dc, dest);
@@ -289,14 +314,6 @@ static TileExcp gen_rr_opcode(DisasContext *dc, unsigned
opext,
case OE_RR_Y1(ILL):
case OE_RR_X1(INV):
case OE_RR_X1(IRET):
- case OE_RR_X1(JALRP):
- case OE_RR_Y1(JALRP):
- case OE_RR_X1(JALR):
- case OE_RR_Y1(JALR):
- case OE_RR_X1(JRP):
- case OE_RR_Y1(JRP):
- case OE_RR_X1(JR):
- case OE_RR_Y1(JR):
return TILEGX_EXCP_OPCODE_UNIMPLEMENTED;
case OE_RR_X1(LD1S):
memop = MO_SB;
@@ -363,6 +380,12 @@ static TileExcp gen_rr_opcode(DisasContext *dc, unsigned
opext,
break;
case OE_RR_X1(LNK):
case OE_RR_Y1(LNK):
+ if (srca) {
+ return TILEGX_EXCP_OPCODE_UNIMPLEMENTED;
+ }
+ tcg_gen_movi_tl(tdest, dc->pc + TILEGX_BUNDLE_SIZE_IN_BYTES);
+ mnemonic = "lnk";
+ break;
case OE_RR_X1(MF):
case OE_RR_X1(NAP):
return TILEGX_EXCP_OPCODE_UNIMPLEMENTED;
@@ -1086,18 +1109,19 @@ static TileExcp gen_branch_opcode_x1(DisasContext *dc,
unsigned ext,
return TILEGX_EXCP_NONE;
}
-static TileExcp gen_jump_opcode_x1(DisasContext *dc, unsigned ext,
- int off)
+static TileExcp gen_jump_opcode_x1(DisasContext *dc, unsigned ext, int off)
{
target_ulong tgt = dc->pc + off * TILEGX_BUNDLE_SIZE_IN_BYTES;
- const char *mnemonic;
+ const char *mnemonic = "j";
- switch (ext) {
- case JAL_JUMP_OPCODE_X1:
- case J_JUMP_OPCODE_X1:
- default:
- return TILEGX_EXCP_OPCODE_UNIMPLEMENTED;
+ /* The extension field is 1 bit, therefore we only have JAL and J. */
+ if (ext == JAL_JUMP_OPCODE_X1) {
+ tcg_gen_movi_tl(dest_gr(dc, TILEGX_R_LR),
+ dc->pc + TILEGX_BUNDLE_SIZE_IN_BYTES);
+ mnemonic = "jal";
}
+ dc->jmp.cond = TCG_COND_ALWAYS;
+ dc->jmp.dest = tcg_const_tl(tgt);
if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)) {
qemu_log("%s " TARGET_FMT_lx " <%s>",
--
2.4.3
- [Qemu-devel] [PATCH v14 15/33] target-tilegx: Handle arithmetic instructions, (continued)
- [Qemu-devel] [PATCH v14 16/33] target-tilegx: Handle most bit manipulation instructions, Richard Henderson, 2015/08/24
- [Qemu-devel] [PATCH v14 17/33] target-tilegx: Handle basic load and store instructions, Richard Henderson, 2015/08/24
- [Qemu-devel] [PATCH v14 19/33] target-tilegx: Handle unconditional jump instructions,
Richard Henderson <=
- [Qemu-devel] [PATCH v14 22/33] target-tilegx: Implement system and memory management instructions, Richard Henderson, 2015/08/24
- [Qemu-devel] [PATCH v14 20/33] target-tilegx: Handle conditional branch instructions, Richard Henderson, 2015/08/24
- [Qemu-devel] [PATCH v14 23/33] target-tilegx: Handle bitfield instructions, Richard Henderson, 2015/08/24
- [Qemu-devel] [PATCH v14 18/33] target-tilegx: Handle post-increment load and store instructions, Richard Henderson, 2015/08/24
- [Qemu-devel] [PATCH v14 21/33] target-tilegx: Handle comparison instructions, Richard Henderson, 2015/08/24