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[Qemu-devel] [RFC 11/28] target-xtensa: implement RST3 group
From: |
Max Filippov |
Subject: |
[Qemu-devel] [RFC 11/28] target-xtensa: implement RST3 group |
Date: |
Wed, 4 May 2011 04:59:11 +0400 |
- access to Special Registers (wsr, rsr);
- access to User Registers (wur, rur);
- misc. operations option (value clamp, sign extension, min, max);
- conditional moves.
Signed-off-by: Max Filippov <address@hidden>
---
target-xtensa/translate.c | 147 +++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 147 insertions(+), 0 deletions(-)
diff --git a/target-xtensa/translate.c b/target-xtensa/translate.c
index f1f01bc..031873e 100644
--- a/target-xtensa/translate.c
+++ b/target-xtensa/translate.c
@@ -102,6 +102,32 @@ void xtensa_translate_init(void)
}
}
+static void gen_rsr(TCGv_i32 d, int sr)
+{
+ if (sregnames[sr]) {
+ tcg_gen_mov_i32(d, cpu_SR[sr]);
+ } else {
+ printf("SR %d not implemented, ", sr);
+ }
+}
+
+static void gen_wsr(DisasContext *dc, uint32_t sr, TCGv_i32 s)
+{
+ static void (* const wsr_handler[256])(DisasContext *dc,
+ uint32_t sr, TCGv_i32 v) = {
+ };
+
+ if (sregnames[sr]) {
+ if (wsr_handler[sr]) {
+ wsr_handler[sr](dc, sr, s);
+ } else {
+ tcg_gen_mov_i32(cpu_SR[sr], s);
+ }
+ } else {
+ printf("SR %d not implemented, ", sr);
+ }
+}
+
static void gen_exception(int excp)
{
TCGv_i32 tmp = tcg_const_i32(excp);
@@ -172,6 +198,8 @@ static void disas_xtensa_insn(DisasContext *dc)
#define BRI8_IMM8 RRI8_IMM8
#define BRI8_IMM8_SE RRI8_IMM8_SE
+#define RSR_SR (_b1)
+
uint8_t _b0 = ldub_code(dc->pc);
uint8_t _b1 = ldub_code(dc->pc + 1);
uint8_t _b2 = ldub_code(dc->pc + 2);
@@ -336,6 +364,125 @@ static void disas_xtensa_insn(DisasContext *dc)
break;
case 3: /*RST3*/
+ switch (_OP2) {
+ case 0: /*RSR*/
+ gen_rsr(cpu_R[RRR_T], RSR_SR);
+ break;
+
+ case 1: /*WSR*/
+ gen_wsr(dc, RSR_SR, cpu_R[RRR_T]);
+ break;
+
+ case 2: /*SEXTu*/
+ HAS_OPTION(XTENSA_OPTION_MISC_OP);
+ {
+ TCGv_i32 tmp = tcg_temp_new_i32();
+ tcg_gen_shli_i32(tmp, cpu_R[RRR_S], 24 - RRR_T);
+ tcg_gen_sari_i32(cpu_R[RRR_R], tmp, 24 - RRR_T);
+ tcg_temp_free(tmp);
+ }
+ break;
+
+ case 3: /*CLAMPSu*/
+ HAS_OPTION(XTENSA_OPTION_MISC_OP);
+ {
+ TCGv_i32 tmp1 = tcg_temp_new_i32();
+ TCGv_i32 tmp2 = tcg_temp_new_i32();
+ int label = gen_new_label();
+
+ tcg_gen_sari_i32(tmp1, cpu_R[RRR_S], 24 - RRR_T);
+ tcg_gen_xor_i32(tmp2, tmp1, cpu_R[RRR_S]);
+ tcg_gen_andi_i32(tmp2, tmp2, 0xffffffff << (RRR_T + 7));
+ tcg_gen_mov_i32(cpu_R[RRR_R], cpu_R[RRR_S]);
+ tcg_gen_brcondi_i32(TCG_COND_EQ, tmp2, 0, label);
+
+ tcg_gen_sari_i32(tmp1, cpu_R[RRR_S], 31);
+ tcg_gen_xori_i32(cpu_R[RRR_R], tmp1,
+ 0xffffffff >> (25 - RRR_T));
+
+ gen_set_label(label);
+
+ tcg_temp_free(tmp1);
+ tcg_temp_free(tmp2);
+ }
+ break;
+
+ case 4: /*MINu*/
+ case 5: /*MAXu*/
+ case 6: /*MINUu*/
+ case 7: /*MAXUu*/
+ HAS_OPTION(XTENSA_OPTION_MISC_OP);
+ {
+ static const TCGCond cond[] = {
+ TCG_COND_LE,
+ TCG_COND_GE,
+ TCG_COND_LEU,
+ TCG_COND_GEU
+ };
+ int label = gen_new_label();
+
+ if (RRR_R != RRR_T) {
+ tcg_gen_mov_i32(cpu_R[RRR_R], cpu_R[RRR_S]);
+ tcg_gen_brcond_i32(cond[_OP2 - 4],
+ cpu_R[RRR_S], cpu_R[RRR_T], label);
+ tcg_gen_mov_i32(cpu_R[RRR_R], cpu_R[RRR_T]);
+ } else {
+ tcg_gen_brcond_i32(cond[_OP2 - 4],
+ cpu_R[RRR_T], cpu_R[RRR_S], label);
+ tcg_gen_mov_i32(cpu_R[RRR_R], cpu_R[RRR_S]);
+ }
+ gen_set_label(label);
+ }
+ break;
+
+ case 8: /*MOVEQZ*/
+ case 9: /*MOVNEZ*/
+ case 10: /*MOVLTZ*/
+ case 11: /*MOVGEZ*/
+ {
+ static const TCGCond cond[] = {
+ TCG_COND_NE,
+ TCG_COND_EQ,
+ TCG_COND_GE,
+ TCG_COND_LT
+ };
+ int label = gen_new_label();
+ tcg_gen_brcondi_i32(cond[_OP2 - 8], cpu_R[RRR_T], 0,
label);
+ tcg_gen_mov_i32(cpu_R[RRR_R], cpu_R[RRR_S]);
+ gen_set_label(label);
+ }
+ break;
+
+ case 12: /*MOVFp*/
+ HAS_OPTION(XTENSA_OPTION_BOOLEAN);
+ break;
+
+ case 13: /*MOVTp*/
+ HAS_OPTION(XTENSA_OPTION_BOOLEAN);
+ break;
+
+ case 14: /*RUR*/
+ {
+ int st = (RRR_S << 4) + RRR_T;
+ if (uregnames[st]) {
+ tcg_gen_mov_i32(cpu_R[RRR_R], cpu_UR[st]);
+ } else {
+ printf("rur %d not implemented, ", st);
+ }
+ }
+ break;
+
+ case 15: /*WUR*/
+ {
+ if (uregnames[RSR_SR]) {
+ tcg_gen_mov_i32(cpu_UR[RSR_SR], cpu_R[RRR_T]);
+ } else {
+ printf("wur %d not implemented, ", RSR_SR);
+ }
+ }
+ break;
+
+ }
break;
case 4: /*EXTUI*/
--
1.7.3.4
- [Qemu-devel] [RFC 03/28] target-xtensa: implement disas_xtensa_insn, (continued)
- [Qemu-devel] [RFC 03/28] target-xtensa: implement disas_xtensa_insn, Max Filippov, 2011/05/03
- [Qemu-devel] [RFC 04/28] target-xtensa: implement narrow instructions, Max Filippov, 2011/05/03
- [Qemu-devel] [RFC 05/28] target-xtensa: implement RT0 group, Max Filippov, 2011/05/03
- [Qemu-devel] [RFC 06/28] target-xtensa: add sample board, Max Filippov, 2011/05/03
- [Qemu-devel] [RFC 07/28] target-xtensa: add gdb support, Max Filippov, 2011/05/03
- [Qemu-devel] [RFC 08/28] target-xtensa: implement conditional jumps, Max Filippov, 2011/05/03
- [Qemu-devel] [RFC 09/28] target-xtensa: implement JX/RET0/CALLX, Max Filippov, 2011/05/03
- [Qemu-devel] [RFC 10/28] target-xtensa: add special and user registers, Max Filippov, 2011/05/03
- [Qemu-devel] [RFC 11/28] target-xtensa: implement RST3 group,
Max Filippov <=
- [Qemu-devel] [RFC 12/28] target-xtensa: implement shifts (ST1 and RST1 groups), Max Filippov, 2011/05/03
[Qemu-devel] [RFC 13/28] target-xtensa: implement LSAI group, Max Filippov, 2011/05/03
[Qemu-devel] [RFC 14/28] target-xtensa: mark reserved and TBD opcodes, Max Filippov, 2011/05/03
[Qemu-devel] [RFC 15/28] target-xtensa: big endian support, Max Filippov, 2011/05/03
[Qemu-devel] [RFC 16/28] target-xtensa: implement SYNC group, Max Filippov, 2011/05/03