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target-tilegx: Handle unconditional jump instructions 

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Richard Henderson 2015-08-21 10:23:07 -07:00
parent 01cd675cfe
commit c230a9944d
1 changed files with 41 additions and 17 deletions
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58
target-tilegx/translate.c
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@ -249,7 +249,7 @@ 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):
@ -268,6 +268,31 @@ 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);
@ -296,14 +321,6 @@ 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;
@ -370,6 +387,12 @@ 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;
@ -1094,18 +1117,19 @@ 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>",