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| author | Yongbok Kim <yongbok.kim@mips.com> | 2018-08-02 16:16:11 +0200 |
|---|---|---|
| committer | Aleksandar Markovic <amarkovic@wavecomp.com> | 2018-08-24 17:51:59 +0200 |
| commit | 80845edf37bac0c1e8d378046bd2b741e4deefc8 (patch) | |
| tree | 5facaaef20a2273688ca075c186cc83f4abb0287 | |
| parent | 8bdb7029c3b73327ba39a59fdc2c6ee3d64b2b24 (diff) | |
| download | qemu-80845edf37bac0c1e8d378046bd2b741e4deefc8.zip | |
target/mips: Add emulation of nanoMIPS 16-bit logic instructions
Add emulation of NOT16, AND16, XOR16, OR16 instructions.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Yongbok Kim <yongbok.kim@mips.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Signed-off-by: Stefan Markovic <smarkovic@wavecomp.com>
| -rw-r--r-- | target/mips/translate.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/target/mips/translate.c b/target/mips/translate.c index 569e58a4b8..75f2b64956 100644 --- a/target/mips/translate.c +++ b/target/mips/translate.c @@ -16760,6 +16760,37 @@ static inline int decode_gpr_gpr4_zero(int r) } +/* extraction utilities */ + +#define NANOMIPS_EXTRACT_RD(op) ((op >> 7) & 0x7) +#define NANOMIPS_EXTRACT_RS(op) ((op >> 4) & 0x7) +#define NANOMIPS_EXTRACT_RS2(op) uMIPS_RS(op) +#define NANOMIPS_EXTRACT_RS1(op) ((op >> 1) & 0x7) +#define NANOMIPS_EXTRACT_RD5(op) ((op >> 5) & 0x1f) +#define NANOMIPS_EXTRACT_RS5(op) (op & 0x1f) + + +static void gen_pool16c_nanomips_insn(DisasContext *ctx) +{ + int rt = decode_gpr_gpr3(NANOMIPS_EXTRACT_RD(ctx->opcode)); + int rs = decode_gpr_gpr3(NANOMIPS_EXTRACT_RS(ctx->opcode)); + + switch (extract32(ctx->opcode, 2, 2)) { + case NM_NOT16: + gen_logic(ctx, OPC_NOR, rt, rs, 0); + break; + case NM_AND16: + gen_logic(ctx, OPC_AND, rt, rt, rs); + break; + case NM_XOR16: + gen_logic(ctx, OPC_XOR, rt, rt, rs); + break; + case NM_OR16: + gen_logic(ctx, OPC_OR, rt, rt, rs); + break; + } +} + static int decode_nanomips_opc(CPUMIPSState *env, DisasContext *ctx) { uint32_t op; @@ -16836,6 +16867,7 @@ static int decode_nanomips_opc(CPUMIPSState *env, DisasContext *ctx) case NM_P16C: switch (ctx->opcode & 1) { case NM_POOL16C_0: + gen_pool16c_nanomips_insn(ctx); break; case NM_LWXS16: gen_ldxs(ctx, rt, rs, rd); @@ -16910,6 +16942,12 @@ static int decode_nanomips_opc(CPUMIPSState *env, DisasContext *ctx) } break; case NM_ANDI16: + { + uint32_t u = extract32(ctx->opcode, 0, 4); + u = (u == 12) ? 0xff : + (u == 13) ? 0xffff : u; + gen_logic_imm(ctx, OPC_ANDI, rt, rs, u); + } break; case NM_P16_LB: offset = extract32(ctx->opcode, 0, 2); |