diff options
| author | Jiaxun Yang <jiaxun.yang@flygoat.com> | 2020-06-14 16:00:46 +0800 |
|---|---|---|
| committer | Aleksandar Markovic <aleksandar.qemu.devel@gmail.com> | 2020-06-15 20:31:25 +0200 |
| commit | 8e2d5831e4b53720d4846aca9eabe3652e7192af (patch) | |
| tree | 35d0b465dad21d5a258ec018964863bfd85e457b /target/mips | |
| parent | 7d3660e79830a069f1848bb4fa1cdf8f666424fb (diff) | |
target/mips: Legalize Loongson insn flags
To match the actual status of Loongson insn, we split flags
for LMMI and LEXT from INSN_LOONGSON2F.
As Loongson-2F only implemented interger part of LEXT, we'll
not enable LEXT for the processor, but instead we're still using
INSN_LOONGSON2F as switch flag of these instructions.
All multimedia instructions have been moved to LMMI flag. Loongson-2F
and Loongson-3A are sharing these instructions.
Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Reviewed-by: Aleksandar Markovic <aleksandar.qemu.devel@gmail.com>
Signed-off-by: Aleksandar Markovic <aleksandar.qemu.devel@gmail.com>
Message-Id: <20200614080049.31134-2-jiaxun.yang@flygoat.com>
Diffstat (limited to 'target/mips')
| -rw-r--r-- | target/mips/mips-defs.h | 4 | ||||
| -rw-r--r-- | target/mips/translate.c | 13 |
2 files changed, 9 insertions, 8 deletions
diff --git a/target/mips/mips-defs.h b/target/mips/mips-defs.h index 0c129106c8..f1b833f947 100644 --- a/target/mips/mips-defs.h +++ b/target/mips/mips-defs.h @@ -70,7 +70,7 @@ #define CPU_VR54XX (CPU_MIPS4 | INSN_VR54XX) #define CPU_R5900 (CPU_MIPS3 | INSN_R5900) #define CPU_LOONGSON2E (CPU_MIPS3 | INSN_LOONGSON2E) -#define CPU_LOONGSON2F (CPU_MIPS3 | INSN_LOONGSON2F) +#define CPU_LOONGSON2F (CPU_MIPS3 | INSN_LOONGSON2F | ASE_LMMI) #define CPU_MIPS5 (CPU_MIPS4 | ISA_MIPS5) @@ -97,7 +97,7 @@ /* Wave Computing: "nanoMIPS" */ #define CPU_NANOMIPS32 (CPU_MIPS32R6 | ISA_NANOMIPS32) -#define CPU_LOONGSON3A (CPU_MIPS64R2 | INSN_LOONGSON3A) +#define CPU_LOONGSON3A (CPU_MIPS64R2 | INSN_LOONGSON3A | ASE_LMMI | ASE_LEXT) /* * Strictly follow the architecture standard: diff --git a/target/mips/translate.c b/target/mips/translate.c index 2caf4cba5a..e49f32f6ae 100644 --- a/target/mips/translate.c +++ b/target/mips/translate.c @@ -1046,7 +1046,7 @@ enum { OPC_BC2NEZ = (0x0D << 21) | OPC_CP2, }; -#define MASK_LMI(op) (MASK_OP_MAJOR(op) | (op & (0x1F << 21)) | (op & 0x1F)) +#define MASK_LMMI(op) (MASK_OP_MAJOR(op) | (op & (0x1F << 21)) | (op & 0x1F)) enum { OPC_PADDSH = (24 << 21) | (0x00) | OPC_CP2, @@ -3421,7 +3421,8 @@ static void gen_ld(DisasContext *ctx, uint32_t opc, TCGv t0, t1, t2; int mem_idx = ctx->mem_idx; - if (rt == 0 && ctx->insn_flags & (INSN_LOONGSON2E | INSN_LOONGSON2F)) { + if (rt == 0 && ctx->insn_flags & (INSN_LOONGSON2E | INSN_LOONGSON2F | + INSN_LOONGSON3A)) { /* * Loongson CPU uses a load to zero register for prefetch. * We emulate it as a NOP. On other CPU we must perform the @@ -5531,7 +5532,7 @@ static void gen_loongson_multimedia(DisasContext *ctx, int rd, int rs, int rt) TCGv_i64 t0, t1; TCGCond cond; - opc = MASK_LMI(ctx->opcode); + opc = MASK_LMMI(ctx->opcode); switch (opc) { case OPC_ADD_CP2: case OPC_SUB_CP2: @@ -27161,7 +27162,7 @@ static void decode_opc_special2_legacy(CPUMIPSState *env, DisasContext *ctx) case OPC_MULTU_G_2F: case OPC_MOD_G_2F: case OPC_MODU_G_2F: - check_insn(ctx, INSN_LOONGSON2F); + check_insn(ctx, INSN_LOONGSON2F | ASE_LEXT); gen_loongson_integer(ctx, op1, rd, rs, rt); break; case OPC_CLO: @@ -27194,7 +27195,7 @@ static void decode_opc_special2_legacy(CPUMIPSState *env, DisasContext *ctx) case OPC_DDIVU_G_2F: case OPC_DMOD_G_2F: case OPC_DMODU_G_2F: - check_insn(ctx, INSN_LOONGSON2F); + check_insn(ctx, INSN_LOONGSON2F | ASE_LEXT); gen_loongson_integer(ctx, op1, rd, rs, rt); break; #endif @@ -30641,7 +30642,7 @@ static void decode_opc(CPUMIPSState *env, DisasContext *ctx) } break; case OPC_CP2: - check_insn(ctx, INSN_LOONGSON2F); + check_insn(ctx, ASE_LMMI); /* Note that these instructions use different fields. */ gen_loongson_multimedia(ctx, sa, rd, rt); break; |