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authorRichard Henderson <rth@twiddle.net>2015-08-21 11:03:37 -0700
committerRichard Henderson <rth@twiddle.net>2015-09-15 07:45:33 -0700
commite04e98bf277309c3964cfd773c0d4c0428f64399 (patch)
tree2f0a137a5bbac7468f73377b80d68fc07c34ce65 /target-tilegx
parentc230a9944dc902e595852b9cd764e4b12d0dc541 (diff)
downloadqemu-arm-e04e98bf277309c3964cfd773c0d4c0428f64399.tar.gz
target-tilegx: Handle conditional branch 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.c51
1 files changed, 38 insertions, 13 deletions
diff --git a/target-tilegx/translate.c b/target-tilegx/translate.c
index c08a3a6371..9c95633fa0 100644
--- a/target-tilegx/translate.c
+++ b/target-tilegx/translate.c
@@ -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;
}