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target-tilegx: Handle conditional branch instructions

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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 11:03:37 -07:00
parent c230a9944d
commit e04e98bf27
1 changed files with 38 additions and 13 deletions
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51
target-tilegx/translate.c
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@ -1089,30 +1089,55 @@ static TileExcp gen_branch_opcode_x1(DisasContext *dc, unsigned ext,
target_ulong tgt = dc->pc + off * TILEGX_BUNDLE_SIZE_IN_BYTES;
const char *mnemonic;
switch (ext) {
case BEQZT_BRANCH_OPCODE_X1:
dc->jmp.dest = tcg_const_tl(tgt);
dc->jmp.val1 = tcg_temp_new();
tcg_gen_mov_tl(dc->jmp.val1, load_gr(dc, srca));
/* Note that the "predict taken" opcodes have bit 0 clear.
Therefore, fold the two cases together by setting bit 0. */
switch (ext | 1) {
case BEQZ_BRANCH_OPCODE_X1:
case BNEZT_BRANCH_OPCODE_X1:
dc->jmp.cond = TCG_COND_EQ;
mnemonic = "beqz";
break;
case BNEZ_BRANCH_OPCODE_X1:
case BLBC_BRANCH_OPCODE_X1:
case BGEZT_BRANCH_OPCODE_X1:
dc->jmp.cond = TCG_COND_NE;
mnemonic = "bnez";
break;
case BGEZ_BRANCH_OPCODE_X1:
case BGTZT_BRANCH_OPCODE_X1:
dc->jmp.cond = TCG_COND_GE;
mnemonic = "bgez";
break;
case BGTZ_BRANCH_OPCODE_X1:
case BLBCT_BRANCH_OPCODE_X1:
case BLBST_BRANCH_OPCODE_X1:
case BLBS_BRANCH_OPCODE_X1:
case BLEZT_BRANCH_OPCODE_X1:
dc->jmp.cond = TCG_COND_GT;
mnemonic = "bgtz";
break;
case BLEZ_BRANCH_OPCODE_X1:
case BLTZT_BRANCH_OPCODE_X1:
dc->jmp.cond = TCG_COND_LE;
mnemonic = "blez";
break;
case BLTZ_BRANCH_OPCODE_X1:
dc->jmp.cond = TCG_COND_LT;
mnemonic = "bltz";
break;
case BLBC_BRANCH_OPCODE_X1:
dc->jmp.cond = TCG_COND_EQ;
tcg_gen_andi_tl(dc->jmp.val1, dc->jmp.val1, 1);
mnemonic = "blbc";
break;
case BLBS_BRANCH_OPCODE_X1:
dc->jmp.cond = TCG_COND_NE;
tcg_gen_andi_tl(dc->jmp.val1, dc->jmp.val1, 1);
mnemonic = "blbs";
break;
default:
return TILEGX_EXCP_OPCODE_UNIMPLEMENTED;
}
if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)) {
qemu_log("%s %s, " TARGET_FMT_lx " <%s>",
mnemonic, reg_names[srca], tgt, lookup_symbol(tgt));
qemu_log("%s%s %s, " TARGET_FMT_lx " <%s>",
mnemonic, ext & 1 ? "" : "t",
reg_names[srca], tgt, lookup_symbol(tgt));
}
return TILEGX_EXCP_NONE;
}