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| author | Richard Henderson <rth@twiddle.net> | 2015-08-21 10:23:07 -0700 |
|---|---|---|
| committer | Richard Henderson <rth@twiddle.net> | 2015-09-15 07:45:33 -0700 |
| commit | c230a9944dc902e595852b9cd764e4b12d0dc541 (patch) | |
| tree | 3e229b28800a26d9c16d0a7bdc66d2bb64be1960 /target-tilegx | |
| parent | 01cd675cfe89c62b27d3d6e28c0fae503c803bf0 (diff) | |
| download | qemu-c230a9944dc902e595852b9cd764e4b12d0dc541.zip | |
target-tilegx: Handle unconditional jump instructions
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <rth@twiddle.net>
Diffstat (limited to 'target-tilegx')
| -rw-r--r-- | target-tilegx/translate.c | 58 |
1 files changed, 41 insertions, 17 deletions
diff --git a/target-tilegx/translate.c b/target-tilegx/translate.c index 7fe42e891d..c08a3a6371 100644 --- a/target-tilegx/translate.c +++ b/target-tilegx/translate.c @@ -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>", |