diff options
| author | Mateja Marjanovic <mateja.marjanovic@rt-rk.com> | 2019-03-04 16:13:14 +0100 |
|---|---|---|
| committer | Aleksandar Markovic <amarkovic@wavecomp.com> | 2019-06-01 20:20:20 +0200 |
| commit | b87eef31f2f8047077d79c3180e9c8e762d2a50f (patch) | |
| tree | f872bb08e3f1a916b5b5d1662df091632982a7c5 /target | |
| parent | d3434d9f785ddaf40e0fd521ded400643ac4be09 (diff) | |
target/mips: Add emulation of MMI instruction PCPYLD
Add emulation of MMI instruction PCPYLD. The emulation is implemented
using TCG front end operations directly to achieve better performance.
Signed-off-by: Mateja Marjanovic <mateja.marjanovic@rt-rk.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Reviewed-by: Aleksandar Rikalo <arikalo@wavecomp.com>
Message-Id: <1551712405-2530-3-git-send-email-mateja.marjanovic@rt-rk.com>
Diffstat (limited to 'target')
| -rw-r--r-- | target/mips/translate.c | 43 |
1 files changed, 42 insertions, 1 deletions
diff --git a/target/mips/translate.c b/target/mips/translate.c index 704eb2bad6..b4fcbb1780 100644 --- a/target/mips/translate.c +++ b/target/mips/translate.c @@ -24419,6 +24419,45 @@ static void gen_mmi_pcpyh(DisasContext *ctx) } } +/* + * PCPYLD rd, rs, rt + * + * Parallel Copy Lower Doubleword + * + * 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 + * +-----------+---------+---------+---------+---------+-----------+ + * | MMI | rs | rt | rd | PCPYLD | MMI2 | + * +-----------+---------+---------+---------+---------+-----------+ + */ +static void gen_mmi_pcpyld(DisasContext *ctx) +{ + uint32_t rs, rt, rd; + uint32_t opcode; + + opcode = ctx->opcode; + + rs = extract32(opcode, 21, 5); + rt = extract32(opcode, 16, 5); + rd = extract32(opcode, 11, 5); + + if (rd == 0) { + /* nop */ + } else { + if (rs == 0) { + tcg_gen_movi_i64(cpu_mmr[rd], 0); + } else { + tcg_gen_mov_i64(cpu_mmr[rd], cpu_gpr[rs]); + } + if (rt == 0) { + tcg_gen_movi_i64(cpu_gpr[rd], 0); + } else { + if (rd != rt) { + tcg_gen_mov_i64(cpu_gpr[rd], cpu_gpr[rt]); + } + } + } +} + #endif @@ -27433,7 +27472,6 @@ static void decode_mmi2(CPUMIPSState *env, DisasContext *ctx) case MMI_OPC_2_PINTH: /* TODO: MMI_OPC_2_PINTH */ case MMI_OPC_2_PMULTW: /* TODO: MMI_OPC_2_PMULTW */ case MMI_OPC_2_PDIVW: /* TODO: MMI_OPC_2_PDIVW */ - case MMI_OPC_2_PCPYLD: /* TODO: MMI_OPC_2_PCPYLD */ case MMI_OPC_2_PMADDH: /* TODO: MMI_OPC_2_PMADDH */ case MMI_OPC_2_PHMADH: /* TODO: MMI_OPC_2_PHMADH */ case MMI_OPC_2_PAND: /* TODO: MMI_OPC_2_PAND */ @@ -27448,6 +27486,9 @@ static void decode_mmi2(CPUMIPSState *env, DisasContext *ctx) case MMI_OPC_2_PROT3W: /* TODO: MMI_OPC_2_PROT3W */ generate_exception_end(ctx, EXCP_RI); /* TODO: MMI_OPC_CLASS_MMI2 */ break; + case MMI_OPC_2_PCPYLD: + gen_mmi_pcpyld(ctx); + break; default: MIPS_INVAL("TX79 MMI class MMI2"); generate_exception_end(ctx, EXCP_RI); |