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X-Received-From: 216.71.153.141 Subject: [Qemu-devel] [RFC v1 12/23] riscv: tcg-target: Add the mov and movi instruction X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: "alistair23@gmail.com" , Alistair Francis Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (found 2 invalid signatures) Content-Type: text/plain; charset="utf-8" Signed-off-by: Alistair Francis Signed-off-by: Michael Clark --- tcg/riscv/tcg-target.inc.c | 62 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 62 insertions(+) diff --git a/tcg/riscv/tcg-target.inc.c b/tcg/riscv/tcg-target.inc.c index 475feca906..0e891e24c9 100644 --- a/tcg/riscv/tcg-target.inc.c +++ b/tcg/riscv/tcg-target.inc.c @@ -422,6 +422,68 @@ static void patch_reloc(tcg_insn_unit *code_ptr, int t= ype, } } =20 +/* + * TCG intrinsics + */ + +static void tcg_out_mov(TCGContext *s, TCGType type, TCGReg ret, TCGReg ar= g) +{ + if (ret =3D=3D arg) { + return; + } + switch (type) { + case TCG_TYPE_I32: + case TCG_TYPE_I64: + tcg_out_opc_imm(s, OPC_ADDI, ret, arg, 0); + break; + default: + g_assert_not_reached(); + } +} + +static void tcg_out_movi(TCGContext *s, TCGType type, TCGReg rd, + tcg_target_long val) +{ + tcg_target_long lo =3D sextract32(val, 0, 12); + tcg_target_long hi =3D val - lo; + + RISCVInsn add32_op =3D TCG_TARGET_REG_BITS =3D=3D 64 ? OPC_ADDIW : OPC= _ADDI; + +#if TCG_TARGET_REG_BITS =3D=3D 64 + ptrdiff_t offset =3D tcg_pcrel_diff(s, (void *)val); +#endif + + if (val =3D=3D lo) { + tcg_out_opc_imm(s, OPC_ADDI, rd, TCG_REG_ZERO, val); + } else if (val && !(val & (val - 1))) { + /* power of 2 */ + tcg_out_opc_imm(s, OPC_ADDI, rd, TCG_REG_ZERO, 1); + tcg_out_opc_imm(s, OPC_SLLI, rd, rd, ctz64(val)); + } else if (TCG_TARGET_REG_BITS =3D=3D 64 && + !(val >> 31 =3D=3D 0 || val >> 31 =3D=3D -1)) { + int shift =3D 12 + ctz64(hi >> 12); + hi >>=3D shift; + tcg_out_movi(s, type, rd, hi); + tcg_out_opc_imm(s, OPC_SLLI, rd, rd, shift); + if (lo !=3D 0) { + tcg_out_opc_imm(s, OPC_ADDI, rd, rd, lo); + } +#if TCG_TARGET_REG_BITS =3D=3D 64 + } else if (offset =3D=3D sextract32(offset, 1, 31) << 1) { + tcg_out_opc_upper(s, OPC_AUIPC, rd, 0); + tcg_out_opc_imm(s, OPC_ADDI, rd, rd, 0); + reloc_call(s->code_ptr - 2, (tcg_insn_unit *)val); +#endif + } else { + if (hi !=3D 0) { + tcg_out_opc_upper(s, OPC_LUI, rd, hi); + } + if (lo !=3D 0) { + tcg_out_opc_imm(s, add32_op, rd, hi =3D=3D 0 ? TCG_REG_ZERO : = rd, lo); + } + } +} + void tb_target_set_jmp_target(uintptr_t tc_ptr, uintptr_t jmp_addr, uintptr_t addr) { --=20 2.19.1