Adds support for emulating the S8LDD MXU instruction. Signed-off-by: Craig Janeczek <jancr...@amazon.com> --- target/mips/translate.c | 82 ++++++++++++++++++++++++++++++++++++++++- 1 file changed, 81 insertions(+), 1 deletion(-)
diff --git a/target/mips/translate.c b/target/mips/translate.c index 381dfad36e..4ccccd5849 100644 --- a/target/mips/translate.c +++ b/target/mips/translate.c @@ -365,6 +365,7 @@ enum { OPC_DCLZ = 0x24 | OPC_SPECIAL2, OPC_DCLO = 0x25 | OPC_SPECIAL2, /* MXU */ + OPC_MXU_S8LDD = 0x22 | OPC_SPECIAL2, OPC_MXU_S32I2M = 0x2F | OPC_SPECIAL2, OPC_MXU_S32M2I = 0x2E | OPC_SPECIAL2, /* Special */ @@ -3784,14 +3785,24 @@ typedef union { uint32_t:5; uint32_t special2:6; } S32M2I; + + struct { + uint32_t op:6; + uint32_t xra:4; + uint32_t s8:8; + uint32_t optn3:3; + uint32_t rb:5; + uint32_t special2:6; + } S8LDD; } MXU_OPCODE; /* MXU Instructions */ static void gen_mxu(DisasContext *ctx, uint32_t opc) { #ifndef TARGET_MIPS64 /* Only works in 32 bit mode */ - TCGv t0; + TCGv t0, t1; t0 = tcg_temp_new(); + t1 = tcg_temp_new(); MXU_OPCODE *opcode = (MXU_OPCODE *)&ctx->opcode; switch (opc) { @@ -3804,9 +3815,77 @@ static void gen_mxu(DisasContext *ctx, uint32_t opc) gen_load_mxu_gpr(t0, opcode->S32M2I.xra); gen_store_gpr(t0, opcode->S32M2I.rb); break; + + case OPC_MXU_S8LDD: + gen_load_gpr(t0, opcode->S8LDD.rb); + tcg_gen_movi_tl(t1, opcode->S8LDD.s8); + tcg_gen_ext8s_tl(t1, t1); + tcg_gen_add_tl(t0, t0, t1); + tcg_gen_qemu_ld_tl(t1, t0, ctx->mem_idx, MO_SB); + switch (opcode->S8LDD.optn3) { + case 0: /*XRa[7:0] = tmp8 */ + tcg_gen_andi_tl(t1, t1, 0xFF); + gen_load_mxu_gpr(t0, opcode->S8LDD.xra); + tcg_gen_andi_tl(t0, t0, 0xFFFFFF00); + tcg_gen_or_tl(t0, t0, t1); + break; + case 1: /* XRa[15:8] = tmp8 */ + tcg_gen_andi_tl(t1, t1, 0xFF); + gen_load_mxu_gpr(t0, opcode->S8LDD.xra); + tcg_gen_andi_tl(t0, t0, 0xFFFF00FF); + tcg_gen_shli_tl(t1, t1, 8); + tcg_gen_or_tl(t0, t0, t1); + break; + case 2: /* XRa[23:16] = tmp8 */ + tcg_gen_andi_tl(t1, t1, 0xFF); + gen_load_mxu_gpr(t0, opcode->S8LDD.xra); + tcg_gen_andi_tl(t0, t0, 0xFF00FFFF); + tcg_gen_shli_tl(t1, t1, 16); + tcg_gen_or_tl(t0, t0, t1); + break; + case 3: /* XRa[31:24] = tmp8 */ + tcg_gen_andi_tl(t1, t1, 0xFF); + gen_load_mxu_gpr(t0, opcode->S8LDD.xra); + tcg_gen_andi_tl(t0, t0, 0x00FFFFFF); + tcg_gen_shli_tl(t1, t1, 24); + tcg_gen_or_tl(t0, t0, t1); + break; + case 4: /* XRa = {8'b0, tmp8, 8'b0, tmp8} */ + tcg_gen_andi_tl(t1, t1, 0xFF); + tcg_gen_mov_tl(t0, t1); + tcg_gen_shli_tl(t1, t1, 16); + tcg_gen_or_tl(t0, t0, t1); + break; + case 5: /* XRa = {tmp8, 8'b0, tmp8, 8'b0} */ + tcg_gen_andi_tl(t1, t1, 0xFF); + tcg_gen_shli_tl(t1, t1, 8); + tcg_gen_mov_tl(t0, t1); + tcg_gen_shli_tl(t1, t1, 16); + tcg_gen_or_tl(t0, t0, t1); + break; + case 6: /* XRa = {{8{sign of tmp8}}, tmp8, {8{sign of tmp8}}, tmp8} */ + 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; + case 7: /* XRa = {tmp8, tmp8, tmp8, tmp8} */ + tcg_gen_andi_tl(t1, t1, 0xFF); + tcg_gen_mov_tl(t0, t1); + tcg_gen_shli_tl(t1, t1, 8); + tcg_gen_or_tl(t0, t0, t1); + tcg_gen_shli_tl(t1, t1, 8); + tcg_gen_or_tl(t0, t0, t1); + tcg_gen_shli_tl(t1, t1, 8); + tcg_gen_or_tl(t0, t0, t1); + break; + } + gen_store_mxu_gpr(t0, opcode->S8LDD.xra); + break; } tcg_temp_free(t0); + tcg_temp_free(t1); #else generate_exception_end(ctx, EXCP_RI); #endif @@ -17895,6 +17974,7 @@ static void decode_opc_special2_legacy(CPUMIPSState *env, DisasContext *ctx) case OPC_MXU_S32I2M: case OPC_MXU_S32M2I: + case OPC_MXU_S8LDD: gen_mxu(ctx, op1); break; -- 2.18.0