target/ppc: add byte-reverse br[dwh] instructions
POWER ISA 3.1 introduces following byte-reverse instructions: brd: Byte-Reverse Doubleword X-form brw: Byte-Reverse Word X-form brh: Byte-Reverse Halfword X-form Signed-off-by: Lijun Pan <ljp@linux.ibm.com> Message-Id: <20200701234344.91843-4-ljp@linux.ibm.com> Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
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@ -6971,7 +6971,47 @@ static void gen_dform3D(DisasContext *ctx)
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return gen_invalid(ctx);
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}
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#if defined(TARGET_PPC64)
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/* brd */
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static void gen_brd(DisasContext *ctx)
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{
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tcg_gen_bswap64_i64(cpu_gpr[rA(ctx->opcode)], cpu_gpr[rS(ctx->opcode)]);
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}
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/* brw */
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static void gen_brw(DisasContext *ctx)
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{
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tcg_gen_bswap64_i64(cpu_gpr[rA(ctx->opcode)], cpu_gpr[rS(ctx->opcode)]);
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tcg_gen_rotli_i64(cpu_gpr[rA(ctx->opcode)], cpu_gpr[rA(ctx->opcode)], 32);
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}
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/* brh */
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static void gen_brh(DisasContext *ctx)
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{
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TCGv_i64 t0 = tcg_temp_new_i64();
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TCGv_i64 t1 = tcg_temp_new_i64();
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TCGv_i64 t2 = tcg_temp_new_i64();
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tcg_gen_movi_i64(t0, 0x00ff00ff00ff00ffull);
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tcg_gen_shri_i64(t1, cpu_gpr[rS(ctx->opcode)], 8);
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tcg_gen_and_i64(t2, t1, t0);
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tcg_gen_and_i64(t1, cpu_gpr[rS(ctx->opcode)], t0);
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tcg_gen_shli_i64(t1, t1, 8);
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tcg_gen_or_i64(cpu_gpr[rA(ctx->opcode)], t1, t2);
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tcg_temp_free_i64(t0);
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tcg_temp_free_i64(t1);
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tcg_temp_free_i64(t2);
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}
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#endif
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static opcode_t opcodes[] = {
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#if defined(TARGET_PPC64)
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GEN_HANDLER_E(brd, 0x1F, 0x1B, 0x05, 0x0000F801, PPC_NONE, PPC2_ISA310),
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GEN_HANDLER_E(brw, 0x1F, 0x1B, 0x04, 0x0000F801, PPC_NONE, PPC2_ISA310),
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GEN_HANDLER_E(brh, 0x1F, 0x1B, 0x06, 0x0000F801, PPC_NONE, PPC2_ISA310),
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#endif
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GEN_HANDLER(invalid, 0x00, 0x00, 0x00, 0xFFFFFFFF, PPC_NONE),
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GEN_HANDLER(cmp, 0x1F, 0x00, 0x00, 0x00400000, PPC_INTEGER),
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GEN_HANDLER(cmpi, 0x0B, 0xFF, 0xFF, 0x00400000, PPC_INTEGER),
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