- base + offset load/store operations for 1/2/4 byte values;
- cache operations (not implemented);
- multiprocessor synchronization operations.
Signed-off-by: Max Filippov <jcmvb...@gmail.com>
---
target-xtensa/cpu.h | 1 +
target-xtensa/translate.c | 89 +++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 90 insertions(+), 0 deletions(-)
diff --git a/target-xtensa/cpu.h b/target-xtensa/cpu.h
index f756b43..ac9bbb4 100644
--- a/target-xtensa/cpu.h
+++ b/target-xtensa/cpu.h
@@ -107,6 +107,7 @@ enum {
enum {
SAR = 3,
+ SCOMPARE1 = 12,
};
typedef struct XtensaConfig {
diff --git a/target-xtensa/translate.c b/target-xtensa/translate.c
index f55e68f..e37d75c 100644
--- a/target-xtensa/translate.c
+++ b/target-xtensa/translate.c
@@ -64,6 +64,7 @@ static TCGv_i32 cpu_UR[256];
static const char * const sregnames[256] = {
[SAR] = "SAR",
+ [SCOMPARE1] = "SCOMPARE1",
};
static const char * const uregnames[256] = {
@@ -860,7 +861,95 @@ static void disas_xtensa_insn(DisasContext *dc)
break;
case 2: /*LSAI*/
+#define gen_load_store(type, shift) do { \
+ TCGv_i32 addr = tcg_temp_new_i32(); \
+ tcg_gen_addi_i32(addr, cpu_R[RRI8_S], RRI8_IMM8 << shift); \
+ tcg_gen_qemu_##type(cpu_R[RRI8_T], addr, 0); \
+ tcg_temp_free(addr); \
+ } while (0)
+
+ switch (RRI8_R) {
+ case 0: /*L8UI*/
+ gen_load_store(ld8u, 0);
+ break;
+
+ case 1: /*L16UI*/
+ gen_load_store(ld16u, 1);
+ break;
+
+ case 2: /*L32I*/
+ gen_load_store(ld32u, 2);
+ break;
+
+ case 4: /*S8I*/
+ gen_load_store(st8, 0);
+ break;
+
+ case 5: /*S16I*/
+ gen_load_store(st16, 1);
+ break;
+
+ case 6: /*S32I*/
+ gen_load_store(st32, 2);
+ break;
+
+ case 7: /*CACHEc*/
+ break;
+
+ case 9: /*L16SI*/
+ gen_load_store(ld16s, 1);
+ break;
+
+ case 10: /*MOVI*/
+ tcg_gen_movi_i32(cpu_R[RRI8_T],
+ RRI8_IMM8 | (RRI8_S << 8) |
+ ((RRI8_S & 0x8) ? 0xfffff000 : 0));
+ break;
+
+ case 11: /*L32AIy*/
+ HAS_OPTION(XTENSA_OPTION_MP_SYNCHRO);
+ gen_load_store(ld32u, 2); /*TODO acquire?*/
+ break;
+
+ case 12: /*ADDI*/
+ tcg_gen_addi_i32(cpu_R[RRI8_T], cpu_R[RRI8_S], RRI8_IMM8_SE);
+ break;
+
+ case 13: /*ADDMI*/
+ tcg_gen_addi_i32(cpu_R[RRI8_T], cpu_R[RRI8_S], RRI8_IMM8_SE << 8);
+ break;
+
+ case 14: /*S32C1Iy*/
+ HAS_OPTION(XTENSA_OPTION_MP_SYNCHRO);
+ {
+ int label = gen_new_label();
+ TCGv_i32 tmp = tcg_temp_local_new_i32();
+ TCGv_i32 addr = tcg_temp_local_new_i32();
+
+ tcg_gen_mov_i32(tmp, cpu_R[RRI8_T]);
+ tcg_gen_addi_i32(addr, cpu_R[RRI8_S], RRI8_IMM8 << 2);
+ tcg_gen_qemu_ld32u(cpu_R[RRI8_T], addr, 0);
+ tcg_gen_brcond_i32(TCG_COND_NE, cpu_R[RRI8_T],
+ cpu_SR[SCOMPARE1], label);
+
+ tcg_gen_qemu_st32(tmp, addr, 0);
+
+ gen_set_label(label);
+ tcg_temp_free(addr);
+ tcg_temp_free(tmp);
+ }
+ break;
+
+ case 15: /*S32RIy*/
+ HAS_OPTION(XTENSA_OPTION_MP_SYNCHRO);
+ gen_load_store(st32, 2); /*TODO release?*/
+ break;
+
+ default: /*reserved*/
+ break;
+ }
break;
+#undef gen_load_store
case 3: /*LSCIp*/
HAS_OPTION(XTENSA_OPTION_COPROCESSOR);
--
1.7.6
