diff options
| -rw-r--r-- | target/mips/translate.c | 90 |
1 files changed, 87 insertions, 3 deletions
diff --git a/target/mips/translate.c b/target/mips/translate.c index 9d5bf7a4c2..cb7a24bb6a 100644 --- a/target/mips/translate.c +++ b/target/mips/translate.c @@ -24089,6 +24089,92 @@ static void gen_mxu_s32m2i(DisasContext *ctx) tcg_temp_free(t0); } +/* + * S8LDD XRa, Rb, s8, optn3 - Load a byte from memory to XRF + */ +static void gen_mxu_s8ldd(DisasContext *ctx) +{ + TCGv t0, t1; + TCGLabel *l0; + uint32_t XRa, Rb, s8, optn3; + + t0 = tcg_temp_new(); + t1 = tcg_temp_new(); + + l0 = gen_new_label(); + + XRa = extract32(ctx->opcode, 6, 4); + s8 = extract32(ctx->opcode, 10, 8); + optn3 = extract32(ctx->opcode, 18, 3); + Rb = extract32(ctx->opcode, 21, 5); + + gen_load_mxu_cr(t0); + tcg_gen_andi_tl(t0, t0, MXU_CR_MXU_EN); + tcg_gen_brcondi_tl(TCG_COND_NE, t0, MXU_CR_MXU_EN, l0); + + gen_load_gpr(t0, Rb); + tcg_gen_addi_tl(t0, t0, (int8_t)s8); + + switch (optn3) { + /* XRa[7:0] = tmp8 */ + case MXU_OPTN3_PTN0: + tcg_gen_qemu_ld_tl(t1, t0, ctx->mem_idx, MO_UB); + gen_load_mxu_gpr(t0, XRa); + tcg_gen_deposit_tl(t0, t0, t1, 0, 8); + break; + /* XRa[15:8] = tmp8 */ + case MXU_OPTN3_PTN1: + tcg_gen_qemu_ld_tl(t1, t0, ctx->mem_idx, MO_UB); + gen_load_mxu_gpr(t0, XRa); + tcg_gen_deposit_tl(t0, t0, t1, 8, 8); + break; + /* XRa[23:16] = tmp8 */ + case MXU_OPTN3_PTN2: + tcg_gen_qemu_ld_tl(t1, t0, ctx->mem_idx, MO_UB); + gen_load_mxu_gpr(t0, XRa); + tcg_gen_deposit_tl(t0, t0, t1, 16, 8); + break; + /* XRa[31:24] = tmp8 */ + case MXU_OPTN3_PTN3: + tcg_gen_qemu_ld_tl(t1, t0, ctx->mem_idx, MO_UB); + gen_load_mxu_gpr(t0, XRa); + tcg_gen_deposit_tl(t0, t0, t1, 24, 8); + break; + /* XRa = {8'b0, tmp8, 8'b0, tmp8} */ + case MXU_OPTN3_PTN4: + tcg_gen_qemu_ld_tl(t1, t0, ctx->mem_idx, MO_UB); + tcg_gen_deposit_tl(t0, t1, t1, 16, 16); + break; + /* XRa = {tmp8, 8'b0, tmp8, 8'b0} */ + case MXU_OPTN3_PTN5: + tcg_gen_qemu_ld_tl(t1, t0, ctx->mem_idx, MO_UB); + tcg_gen_shli_tl(t1, t1, 8); + tcg_gen_deposit_tl(t0, t1, t1, 16, 16); + break; + /* XRa = {{8{sign of tmp8}}, tmp8, {8{sign of tmp8}}, tmp8} */ + case MXU_OPTN3_PTN6: + tcg_gen_qemu_ld_tl(t1, t0, ctx->mem_idx, MO_SB); + tcg_gen_mov_tl(t0, t1); + tcg_gen_andi_tl(t0, t0, 0xFF00FFFF); + tcg_gen_shli_tl(t1, t1, 16); + tcg_gen_or_tl(t0, t0, t1); + break; + /* XRa = {tmp8, tmp8, tmp8, tmp8} */ + case MXU_OPTN3_PTN7: + tcg_gen_qemu_ld_tl(t1, t0, ctx->mem_idx, MO_UB); + tcg_gen_deposit_tl(t1, t1, t1, 8, 8); + tcg_gen_deposit_tl(t0, t1, t1, 16, 16); + break; + } + + gen_store_mxu_gpr(t0, XRa); + + gen_set_label(l0); + + tcg_temp_free(t0); + tcg_temp_free(t1); +} + /* * Decoding engine for MXU @@ -25134,9 +25220,7 @@ static void decode_opc_mxu(CPUMIPSState *env, DisasContext *ctx) generate_exception_end(ctx, EXCP_RI); break; case OPC_MXU_S8LDD: - /* TODO: Implement emulation of S8LDD instruction. */ - MIPS_INVAL("OPC_MXU_S8LDD"); - generate_exception_end(ctx, EXCP_RI); + gen_mxu_s8ldd(ctx); break; case OPC_MXU_S8STD: /* TODO: Implement emulation of S8STD instruction. */ |