From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([209.51.188.92]:57191) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1h0pIe-00041B-Pd for qemu-devel@nongnu.org; Mon, 04 Mar 2019 10:14:41 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1h0pIc-0007rS-R7 for qemu-devel@nongnu.org; Mon, 04 Mar 2019 10:14:40 -0500 Received: from mx2.rt-rk.com ([89.216.37.149]:39728 helo=mail.rt-rk.com) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1h0pIc-0007oB-9g for qemu-devel@nongnu.org; Mon, 04 Mar 2019 10:14:38 -0500 From: Mateja Marjanovic Date: Mon, 4 Mar 2019 16:13:18 +0100 Message-Id: <1551712405-2530-7-git-send-email-mateja.marjanovic@rt-rk.com> In-Reply-To: <1551712405-2530-1-git-send-email-mateja.marjanovic@rt-rk.com> References: <1551712405-2530-1-git-send-email-mateja.marjanovic@rt-rk.com> Subject: [Qemu-devel] [PATCH v3 06/13] target/mips: Add emulation of MMI instruction PEXEH List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: aurelien@aurel32.net, amarkovic@wavecomp.com, arikalo@wavecomp.com From: Mateja Marjanovic Add emulation of MMI instruction PEXEH. The emulation is implemented using TCG front end operations directly to achieve better performance. Signed-off-by: Mateja Marjanovic --- target/mips/translate.c | 75 ++++++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 74 insertions(+), 1 deletion(-) diff --git a/target/mips/translate.c b/target/mips/translate.c index 64eb10c..01efcde 100644 --- a/target/mips/translate.c +++ b/target/mips/translate.c @@ -24650,6 +24650,77 @@ static void gen_mmi_pexcw(DisasContext *ctx) } } +/* + * PEXEH rd, rt + * + * Parallel Exchange Even Halfword + * + * 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 |0 0 0 0 0| rt | rd | PEXEH | MMI2 | + * +-----------+---------+---------+---------+---------+-----------+ + */ + +static void gen_mmi_pexeh(DisasContext *ctx) +{ + uint32_t pd, rt, rd; + uint32_t opcode; + + opcode = ctx->opcode; + + pd = extract32(opcode, 21, 5); + rt = extract32(opcode, 16, 5); + rd = extract32(opcode, 11, 5); + + if (unlikely(pd != 0)) { + generate_exception_end(ctx, EXCP_RI); + } else if (rd == 0) { + /* nop */ + } else if (rt == 0) { + tcg_gen_movi_i64(cpu_gpr[rd], 0); + tcg_gen_movi_i64(cpu_mmr[rd], 0); + } else { + TCGv_i64 t0 = tcg_temp_new(); + TCGv_i64 t1 = tcg_temp_new(); + uint64_t mask0 = (1ULL << 16) - 1; + uint64_t mask1 = mask0 << 16; + uint64_t mask2 = mask1 << 16; + uint64_t mask3 = mask2 << 16; + + tcg_gen_movi_i64(t1, 0); + + tcg_gen_andi_i64(t0, cpu_gpr[rt], mask0); + tcg_gen_shli_i64(t0, t0, 32); + tcg_gen_or_i64(t1, t0, t1); + tcg_gen_andi_i64(t0, cpu_gpr[rt], mask1); + tcg_gen_or_i64(t1, t0, t1); + tcg_gen_andi_i64(t0, cpu_gpr[rt], mask2); + tcg_gen_shri_i64(t0, t0, 32); + tcg_gen_or_i64(t1, t0, t1); + tcg_gen_andi_i64(t0, cpu_gpr[rt], mask3); + tcg_gen_or_i64(t1, t0, t1); + + tcg_gen_mov_i64(cpu_gpr[rd], t1); + tcg_gen_movi_i64(t1, 0); + + tcg_gen_andi_i64(t0, cpu_mmr[rt], mask0); + tcg_gen_shli_i64(t0, t0, 32); + tcg_gen_or_i64(t1, t0, t1); + tcg_gen_andi_i64(t0, cpu_mmr[rt], mask1); + tcg_gen_or_i64(t1, t0, t1); + tcg_gen_andi_i64(t0, cpu_mmr[rt], mask2); + tcg_gen_shri_i64(t0, t0, 32); + tcg_gen_or_i64(t1, t0, t1); + tcg_gen_andi_i64(t0, cpu_mmr[rt], mask3); + tcg_gen_or_i64(t1, t0, t1); + + tcg_gen_mov_i64(cpu_mmr[rd], t1); + + tcg_temp_free(t0); + tcg_temp_free(t1); + } +} + #endif @@ -27670,7 +27741,6 @@ static void decode_mmi2(CPUMIPSState *env, DisasContext *ctx) case MMI_OPC_2_PXOR: /* TODO: MMI_OPC_2_PXOR */ case MMI_OPC_2_PMSUBH: /* TODO: MMI_OPC_2_PMSUBH */ case MMI_OPC_2_PHMSBH: /* TODO: MMI_OPC_2_PHMSBH */ - case MMI_OPC_2_PEXEH: /* TODO: MMI_OPC_2_PEXEH */ case MMI_OPC_2_PREVH: /* TODO: MMI_OPC_2_PREVH */ case MMI_OPC_2_PMULTH: /* TODO: MMI_OPC_2_PMULTH */ case MMI_OPC_2_PDIVBW: /* TODO: MMI_OPC_2_PDIVBW */ @@ -27681,6 +27751,9 @@ static void decode_mmi2(CPUMIPSState *env, DisasContext *ctx) case MMI_OPC_2_PCPYLD: gen_mmi_pcpyld(ctx); break; + case MMI_OPC_2_PEXEH: + gen_mmi_pexeh(ctx); + break; default: MIPS_INVAL("TX79 MMI class MMI2"); generate_exception_end(ctx, EXCP_RI); -- 2.7.4