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qemu/target/riscv/insn_trans/trans_rvi.c.inc
Richard Henderson a9814e3e08 target/riscv: Minimize the calls to decode_save_opc 
The set of instructions that require decode_save_opc for
unwinding is really fairly small -- only insns that can
raise ILLEGAL_INSN at runtime.  This includes CSR, anything
that uses a *new* fp rounding mode, and many privileged insns.

Since unwind info is stored as the difference from the
previous insn, storing a 0 for most insns minimizes the
size of the unwind info.

Booting a debian kernel image to the missing rootfs panic yields

- gen code size       22226819/1026886656
+ gen code size       21601907/1026886656

on 41k TranslationBlocks, a savings of 610kB or a bit less than 3%.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20220604231004.49990-4-richard.henderson@linaro.org>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
2022-07-03 10:03:20 +10:00

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/*
* RISC-V translation routines for the RVXI Base Integer Instruction Set.
*
* Copyright (c) 2016-2017 Sagar Karandikar, sagark@eecs.berkeley.edu
* Copyright (c) 2018 Peer Adelt, peer.adelt@hni.uni-paderborn.de
* Bastian Koppelmann, kbastian@mail.uni-paderborn.de
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2 or later, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
static bool trans_illegal(DisasContext *ctx, arg_empty *a)
{
gen_exception_illegal(ctx);
return true;
}
static bool trans_c64_illegal(DisasContext *ctx, arg_empty *a)
{
REQUIRE_64_OR_128BIT(ctx);
return trans_illegal(ctx, a);
}
static bool trans_lui(DisasContext *ctx, arg_lui *a)
{
gen_set_gpri(ctx, a->rd, a->imm);
return true;
}
static bool trans_auipc(DisasContext *ctx, arg_auipc *a)
{
gen_set_gpri(ctx, a->rd, a->imm + ctx->base.pc_next);
return true;
}
static bool trans_jal(DisasContext *ctx, arg_jal *a)
{
gen_jal(ctx, a->rd, a->imm);
return true;
}
static bool trans_jalr(DisasContext *ctx, arg_jalr *a)
{
TCGLabel *misaligned = NULL;
tcg_gen_addi_tl(cpu_pc, get_gpr(ctx, a->rs1, EXT_NONE), a->imm);
tcg_gen_andi_tl(cpu_pc, cpu_pc, (target_ulong)-2);
gen_set_pc(ctx, cpu_pc);
if (!has_ext(ctx, RVC)) {
TCGv t0 = tcg_temp_new();
misaligned = gen_new_label();
tcg_gen_andi_tl(t0, cpu_pc, 0x2);
tcg_gen_brcondi_tl(TCG_COND_NE, t0, 0x0, misaligned);
tcg_temp_free(t0);
}
gen_set_gpri(ctx, a->rd, ctx->pc_succ_insn);
tcg_gen_lookup_and_goto_ptr();
if (misaligned) {
gen_set_label(misaligned);
gen_exception_inst_addr_mis(ctx);
}
ctx->base.is_jmp = DISAS_NORETURN;
return true;
}
static TCGCond gen_compare_i128(bool bz, TCGv rl,
TCGv al, TCGv ah, TCGv bl, TCGv bh,
TCGCond cond)
{
TCGv rh = tcg_temp_new();
bool invert = false;
switch (cond) {
case TCG_COND_EQ:
case TCG_COND_NE:
if (bz) {
tcg_gen_or_tl(rl, al, ah);
} else {
tcg_gen_xor_tl(rl, al, bl);
tcg_gen_xor_tl(rh, ah, bh);
tcg_gen_or_tl(rl, rl, rh);
}
break;
case TCG_COND_GE:
case TCG_COND_LT:
if (bz) {
tcg_gen_mov_tl(rl, ah);
} else {
TCGv tmp = tcg_temp_new();
tcg_gen_sub2_tl(rl, rh, al, ah, bl, bh);
tcg_gen_xor_tl(rl, rh, ah);
tcg_gen_xor_tl(tmp, ah, bh);
tcg_gen_and_tl(rl, rl, tmp);
tcg_gen_xor_tl(rl, rh, rl);
tcg_temp_free(tmp);
}
break;
case TCG_COND_LTU:
invert = true;
/* fallthrough */
case TCG_COND_GEU:
{
TCGv tmp = tcg_temp_new();
TCGv zero = tcg_constant_tl(0);
TCGv one = tcg_constant_tl(1);
cond = TCG_COND_NE;
/* borrow in to second word */
tcg_gen_setcond_tl(TCG_COND_LTU, tmp, al, bl);
/* seed third word with 1, which will be result */
tcg_gen_sub2_tl(tmp, rh, ah, one, tmp, zero);
tcg_gen_sub2_tl(tmp, rl, tmp, rh, bh, zero);
tcg_temp_free(tmp);
}
break;
default:
g_assert_not_reached();
}
if (invert) {
cond = tcg_invert_cond(cond);
}
tcg_temp_free(rh);
return cond;
}
static void gen_setcond_i128(TCGv rl, TCGv rh,
TCGv src1l, TCGv src1h,
TCGv src2l, TCGv src2h,
TCGCond cond)
{
cond = gen_compare_i128(false, rl, src1l, src1h, src2l, src2h, cond);
tcg_gen_setcondi_tl(cond, rl, rl, 0);
tcg_gen_movi_tl(rh, 0);
}
static bool gen_branch(DisasContext *ctx, arg_b *a, TCGCond cond)
{
TCGLabel *l = gen_new_label();
TCGv src1 = get_gpr(ctx, a->rs1, EXT_SIGN);
TCGv src2 = get_gpr(ctx, a->rs2, EXT_SIGN);
if (get_xl(ctx) == MXL_RV128) {
TCGv src1h = get_gprh(ctx, a->rs1);
TCGv src2h = get_gprh(ctx, a->rs2);
TCGv tmp = tcg_temp_new();
cond = gen_compare_i128(a->rs2 == 0,
tmp, src1, src1h, src2, src2h, cond);
tcg_gen_brcondi_tl(cond, tmp, 0, l);
tcg_temp_free(tmp);
} else {
tcg_gen_brcond_tl(cond, src1, src2, l);
}
gen_goto_tb(ctx, 1, ctx->pc_succ_insn);
gen_set_label(l); /* branch taken */
if (!has_ext(ctx, RVC) && ((ctx->base.pc_next + a->imm) & 0x3)) {
/* misaligned */
gen_exception_inst_addr_mis(ctx);
} else {
gen_goto_tb(ctx, 0, ctx->base.pc_next + a->imm);
}
ctx->base.is_jmp = DISAS_NORETURN;
return true;
}
static bool trans_beq(DisasContext *ctx, arg_beq *a)
{
return gen_branch(ctx, a, TCG_COND_EQ);
}
static bool trans_bne(DisasContext *ctx, arg_bne *a)
{
return gen_branch(ctx, a, TCG_COND_NE);
}
static bool trans_blt(DisasContext *ctx, arg_blt *a)
{
return gen_branch(ctx, a, TCG_COND_LT);
}
static bool trans_bge(DisasContext *ctx, arg_bge *a)
{
return gen_branch(ctx, a, TCG_COND_GE);
}
static bool trans_bltu(DisasContext *ctx, arg_bltu *a)
{
return gen_branch(ctx, a, TCG_COND_LTU);
}
static bool trans_bgeu(DisasContext *ctx, arg_bgeu *a)
{
return gen_branch(ctx, a, TCG_COND_GEU);
}
static bool gen_load_tl(DisasContext *ctx, arg_lb *a, MemOp memop)
{
TCGv dest = dest_gpr(ctx, a->rd);
TCGv addr = get_address(ctx, a->rs1, a->imm);
tcg_gen_qemu_ld_tl(dest, addr, ctx->mem_idx, memop);
gen_set_gpr(ctx, a->rd, dest);
return true;
}
/* Compute only 64-bit addresses to use the address translation mechanism */
static bool gen_load_i128(DisasContext *ctx, arg_lb *a, MemOp memop)
{
TCGv src1l = get_gpr(ctx, a->rs1, EXT_NONE);
TCGv destl = dest_gpr(ctx, a->rd);
TCGv desth = dest_gprh(ctx, a->rd);
TCGv addrl = tcg_temp_new();
tcg_gen_addi_tl(addrl, src1l, a->imm);
if ((memop & MO_SIZE) <= MO_64) {
tcg_gen_qemu_ld_tl(destl, addrl, ctx->mem_idx, memop);
if (memop & MO_SIGN) {
tcg_gen_sari_tl(desth, destl, 63);
} else {
tcg_gen_movi_tl(desth, 0);
}
} else {
/* assume little-endian memory access for now */
tcg_gen_qemu_ld_tl(destl, addrl, ctx->mem_idx, MO_TEUQ);
tcg_gen_addi_tl(addrl, addrl, 8);
tcg_gen_qemu_ld_tl(desth, addrl, ctx->mem_idx, MO_TEUQ);
}
gen_set_gpr128(ctx, a->rd, destl, desth);
tcg_temp_free(addrl);
return true;
}
static bool gen_load(DisasContext *ctx, arg_lb *a, MemOp memop)
{
if (get_xl(ctx) == MXL_RV128) {
return gen_load_i128(ctx, a, memop);
} else {
return gen_load_tl(ctx, a, memop);
}
}
static bool trans_lb(DisasContext *ctx, arg_lb *a)
{
return gen_load(ctx, a, MO_SB);
}
static bool trans_lh(DisasContext *ctx, arg_lh *a)
{
return gen_load(ctx, a, MO_TESW);
}
static bool trans_lw(DisasContext *ctx, arg_lw *a)
{
return gen_load(ctx, a, MO_TESL);
}
static bool trans_ld(DisasContext *ctx, arg_ld *a)
{
REQUIRE_64_OR_128BIT(ctx);
return gen_load(ctx, a, MO_TESQ);
}
static bool trans_lq(DisasContext *ctx, arg_lq *a)
{
REQUIRE_128BIT(ctx);
return gen_load(ctx, a, MO_TEUO);
}
static bool trans_lbu(DisasContext *ctx, arg_lbu *a)
{
return gen_load(ctx, a, MO_UB);
}
static bool trans_lhu(DisasContext *ctx, arg_lhu *a)
{
return gen_load(ctx, a, MO_TEUW);
}
static bool trans_lwu(DisasContext *ctx, arg_lwu *a)
{
REQUIRE_64_OR_128BIT(ctx);
return gen_load(ctx, a, MO_TEUL);
}
static bool trans_ldu(DisasContext *ctx, arg_ldu *a)
{
REQUIRE_128BIT(ctx);
return gen_load(ctx, a, MO_TEUQ);
}
static bool gen_store_tl(DisasContext *ctx, arg_sb *a, MemOp memop)
{
TCGv addr = get_address(ctx, a->rs1, a->imm);
TCGv data = get_gpr(ctx, a->rs2, EXT_NONE);
tcg_gen_qemu_st_tl(data, addr, ctx->mem_idx, memop);
return true;
}
static bool gen_store_i128(DisasContext *ctx, arg_sb *a, MemOp memop)
{
TCGv src1l = get_gpr(ctx, a->rs1, EXT_NONE);
TCGv src2l = get_gpr(ctx, a->rs2, EXT_NONE);
TCGv src2h = get_gprh(ctx, a->rs2);
TCGv addrl = tcg_temp_new();
tcg_gen_addi_tl(addrl, src1l, a->imm);
if ((memop & MO_SIZE) <= MO_64) {
tcg_gen_qemu_st_tl(src2l, addrl, ctx->mem_idx, memop);
} else {
/* little-endian memory access assumed for now */
tcg_gen_qemu_st_tl(src2l, addrl, ctx->mem_idx, MO_TEUQ);
tcg_gen_addi_tl(addrl, addrl, 8);
tcg_gen_qemu_st_tl(src2h, addrl, ctx->mem_idx, MO_TEUQ);
}
tcg_temp_free(addrl);
return true;
}
static bool gen_store(DisasContext *ctx, arg_sb *a, MemOp memop)
{
if (get_xl(ctx) == MXL_RV128) {
return gen_store_i128(ctx, a, memop);
} else {
return gen_store_tl(ctx, a, memop);
}
}
static bool trans_sb(DisasContext *ctx, arg_sb *a)
{
return gen_store(ctx, a, MO_SB);
}
static bool trans_sh(DisasContext *ctx, arg_sh *a)
{
return gen_store(ctx, a, MO_TESW);
}
static bool trans_sw(DisasContext *ctx, arg_sw *a)
{
return gen_store(ctx, a, MO_TESL);
}
static bool trans_sd(DisasContext *ctx, arg_sd *a)
{
REQUIRE_64_OR_128BIT(ctx);
return gen_store(ctx, a, MO_TEUQ);
}
static bool trans_sq(DisasContext *ctx, arg_sq *a)
{
REQUIRE_128BIT(ctx);
return gen_store(ctx, a, MO_TEUO);
}
static bool trans_addd(DisasContext *ctx, arg_addd *a)
{
REQUIRE_128BIT(ctx);
ctx->ol = MXL_RV64;
return gen_arith(ctx, a, EXT_NONE, tcg_gen_add_tl, NULL);
}
static bool trans_addid(DisasContext *ctx, arg_addid *a)
{
REQUIRE_128BIT(ctx);
ctx->ol = MXL_RV64;
return gen_arith_imm_fn(ctx, a, EXT_NONE, tcg_gen_addi_tl, NULL);
}
static bool trans_subd(DisasContext *ctx, arg_subd *a)
{
REQUIRE_128BIT(ctx);
ctx->ol = MXL_RV64;
return gen_arith(ctx, a, EXT_NONE, tcg_gen_sub_tl, NULL);
}
static void gen_addi2_i128(TCGv retl, TCGv reth,
TCGv srcl, TCGv srch, target_long imm)
{
TCGv imml = tcg_constant_tl(imm);
TCGv immh = tcg_constant_tl(-(imm < 0));
tcg_gen_add2_tl(retl, reth, srcl, srch, imml, immh);
}
static bool trans_addi(DisasContext *ctx, arg_addi *a)
{
return gen_arith_imm_fn(ctx, a, EXT_NONE, tcg_gen_addi_tl, gen_addi2_i128);
}
static void gen_slt(TCGv ret, TCGv s1, TCGv s2)
{
tcg_gen_setcond_tl(TCG_COND_LT, ret, s1, s2);
}
static void gen_slt_i128(TCGv retl, TCGv reth,
TCGv s1l, TCGv s1h, TCGv s2l, TCGv s2h)
{
gen_setcond_i128(retl, reth, s1l, s1h, s2l, s2h, TCG_COND_LT);
}
static void gen_sltu(TCGv ret, TCGv s1, TCGv s2)
{
tcg_gen_setcond_tl(TCG_COND_LTU, ret, s1, s2);
}
static void gen_sltu_i128(TCGv retl, TCGv reth,
TCGv s1l, TCGv s1h, TCGv s2l, TCGv s2h)
{
gen_setcond_i128(retl, reth, s1l, s1h, s2l, s2h, TCG_COND_LTU);
}
static bool trans_slti(DisasContext *ctx, arg_slti *a)
{
return gen_arith_imm_tl(ctx, a, EXT_SIGN, gen_slt, gen_slt_i128);
}
static bool trans_sltiu(DisasContext *ctx, arg_sltiu *a)
{
return gen_arith_imm_tl(ctx, a, EXT_SIGN, gen_sltu, gen_sltu_i128);
}
static bool trans_xori(DisasContext *ctx, arg_xori *a)
{
return gen_logic_imm_fn(ctx, a, tcg_gen_xori_tl);
}
static bool trans_ori(DisasContext *ctx, arg_ori *a)
{
return gen_logic_imm_fn(ctx, a, tcg_gen_ori_tl);
}
static bool trans_andi(DisasContext *ctx, arg_andi *a)
{
return gen_logic_imm_fn(ctx, a, tcg_gen_andi_tl);
}
static void gen_slli_i128(TCGv retl, TCGv reth,
TCGv src1l, TCGv src1h,
target_long shamt)
{
if (shamt >= 64) {
tcg_gen_shli_tl(reth, src1l, shamt - 64);
tcg_gen_movi_tl(retl, 0);
} else {
tcg_gen_extract2_tl(reth, src1l, src1h, 64 - shamt);
tcg_gen_shli_tl(retl, src1l, shamt);
}
}
static bool trans_slli(DisasContext *ctx, arg_slli *a)
{
return gen_shift_imm_fn(ctx, a, EXT_NONE, tcg_gen_shli_tl, gen_slli_i128);
}
static void gen_srliw(TCGv dst, TCGv src, target_long shamt)
{
tcg_gen_extract_tl(dst, src, shamt, 32 - shamt);
}
static void gen_srli_i128(TCGv retl, TCGv reth,
TCGv src1l, TCGv src1h,
target_long shamt)
{
if (shamt >= 64) {
tcg_gen_shri_tl(retl, src1h, shamt - 64);
tcg_gen_movi_tl(reth, 0);
} else {
tcg_gen_extract2_tl(retl, src1l, src1h, shamt);
tcg_gen_shri_tl(reth, src1h, shamt);
}
}
static bool trans_srli(DisasContext *ctx, arg_srli *a)
{
return gen_shift_imm_fn_per_ol(ctx, a, EXT_NONE,
tcg_gen_shri_tl, gen_srliw, gen_srli_i128);
}
static void gen_sraiw(TCGv dst, TCGv src, target_long shamt)
{
tcg_gen_sextract_tl(dst, src, shamt, 32 - shamt);
}
static void gen_srai_i128(TCGv retl, TCGv reth,
TCGv src1l, TCGv src1h,
target_long shamt)
{
if (shamt >= 64) {
tcg_gen_sari_tl(retl, src1h, shamt - 64);
tcg_gen_sari_tl(reth, src1h, 63);
} else {
tcg_gen_extract2_tl(retl, src1l, src1h, shamt);
tcg_gen_sari_tl(reth, src1h, shamt);
}
}
static bool trans_srai(DisasContext *ctx, arg_srai *a)
{
return gen_shift_imm_fn_per_ol(ctx, a, EXT_NONE,
tcg_gen_sari_tl, gen_sraiw, gen_srai_i128);
}
static bool trans_add(DisasContext *ctx, arg_add *a)
{
return gen_arith(ctx, a, EXT_NONE, tcg_gen_add_tl, tcg_gen_add2_tl);
}
static bool trans_sub(DisasContext *ctx, arg_sub *a)
{
return gen_arith(ctx, a, EXT_NONE, tcg_gen_sub_tl, tcg_gen_sub2_tl);
}
static void gen_sll_i128(TCGv destl, TCGv desth,
TCGv src1l, TCGv src1h, TCGv shamt)
{
TCGv ls = tcg_temp_new();
TCGv rs = tcg_temp_new();
TCGv hs = tcg_temp_new();
TCGv ll = tcg_temp_new();
TCGv lr = tcg_temp_new();
TCGv h0 = tcg_temp_new();
TCGv h1 = tcg_temp_new();
TCGv zero = tcg_constant_tl(0);
tcg_gen_andi_tl(hs, shamt, 64);
tcg_gen_andi_tl(ls, shamt, 63);
tcg_gen_neg_tl(shamt, shamt);
tcg_gen_andi_tl(rs, shamt, 63);
tcg_gen_shl_tl(ll, src1l, ls);
tcg_gen_shl_tl(h0, src1h, ls);
tcg_gen_shr_tl(lr, src1l, rs);
tcg_gen_movcond_tl(TCG_COND_NE, lr, shamt, zero, lr, zero);
tcg_gen_or_tl(h1, h0, lr);
tcg_gen_movcond_tl(TCG_COND_NE, destl, hs, zero, zero, ll);
tcg_gen_movcond_tl(TCG_COND_NE, desth, hs, zero, ll, h1);
tcg_temp_free(ls);
tcg_temp_free(rs);
tcg_temp_free(hs);
tcg_temp_free(ll);
tcg_temp_free(lr);
tcg_temp_free(h0);
tcg_temp_free(h1);
}
static bool trans_sll(DisasContext *ctx, arg_sll *a)
{
return gen_shift(ctx, a, EXT_NONE, tcg_gen_shl_tl, gen_sll_i128);
}
static bool trans_slt(DisasContext *ctx, arg_slt *a)
{
return gen_arith(ctx, a, EXT_SIGN, gen_slt, gen_slt_i128);
}
static bool trans_sltu(DisasContext *ctx, arg_sltu *a)
{
return gen_arith(ctx, a, EXT_SIGN, gen_sltu, gen_sltu_i128);
}
static void gen_srl_i128(TCGv destl, TCGv desth,
TCGv src1l, TCGv src1h, TCGv shamt)
{
TCGv ls = tcg_temp_new();
TCGv rs = tcg_temp_new();
TCGv hs = tcg_temp_new();
TCGv ll = tcg_temp_new();
TCGv lr = tcg_temp_new();
TCGv h0 = tcg_temp_new();
TCGv h1 = tcg_temp_new();
TCGv zero = tcg_constant_tl(0);
tcg_gen_andi_tl(hs, shamt, 64);
tcg_gen_andi_tl(rs, shamt, 63);
tcg_gen_neg_tl(shamt, shamt);
tcg_gen_andi_tl(ls, shamt, 63);
tcg_gen_shr_tl(lr, src1l, rs);
tcg_gen_shr_tl(h1, src1h, rs);
tcg_gen_shl_tl(ll, src1h, ls);
tcg_gen_movcond_tl(TCG_COND_NE, ll, shamt, zero, ll, zero);
tcg_gen_or_tl(h0, ll, lr);
tcg_gen_movcond_tl(TCG_COND_NE, destl, hs, zero, h1, h0);
tcg_gen_movcond_tl(TCG_COND_NE, desth, hs, zero, zero, h1);
tcg_temp_free(ls);
tcg_temp_free(rs);
tcg_temp_free(hs);
tcg_temp_free(ll);
tcg_temp_free(lr);
tcg_temp_free(h0);
tcg_temp_free(h1);
}
static bool trans_srl(DisasContext *ctx, arg_srl *a)
{
return gen_shift(ctx, a, EXT_ZERO, tcg_gen_shr_tl, gen_srl_i128);
}
static void gen_sra_i128(TCGv destl, TCGv desth,
TCGv src1l, TCGv src1h, TCGv shamt)
{
TCGv ls = tcg_temp_new();
TCGv rs = tcg_temp_new();
TCGv hs = tcg_temp_new();
TCGv ll = tcg_temp_new();
TCGv lr = tcg_temp_new();
TCGv h0 = tcg_temp_new();
TCGv h1 = tcg_temp_new();
TCGv zero = tcg_constant_tl(0);
tcg_gen_andi_tl(hs, shamt, 64);
tcg_gen_andi_tl(rs, shamt, 63);
tcg_gen_neg_tl(shamt, shamt);
tcg_gen_andi_tl(ls, shamt, 63);
tcg_gen_shr_tl(lr, src1l, rs);
tcg_gen_sar_tl(h1, src1h, rs);
tcg_gen_shl_tl(ll, src1h, ls);
tcg_gen_movcond_tl(TCG_COND_NE, ll, shamt, zero, ll, zero);
tcg_gen_or_tl(h0, ll, lr);
tcg_gen_sari_tl(lr, src1h, 63);
tcg_gen_movcond_tl(TCG_COND_NE, destl, hs, zero, h1, h0);
tcg_gen_movcond_tl(TCG_COND_NE, desth, hs, zero, lr, h1);
tcg_temp_free(ls);
tcg_temp_free(rs);
tcg_temp_free(hs);
tcg_temp_free(ll);
tcg_temp_free(lr);
tcg_temp_free(h0);
tcg_temp_free(h1);
}
static bool trans_sra(DisasContext *ctx, arg_sra *a)
{
return gen_shift(ctx, a, EXT_SIGN, tcg_gen_sar_tl, gen_sra_i128);
}
static bool trans_xor(DisasContext *ctx, arg_xor *a)
{
return gen_logic(ctx, a, tcg_gen_xor_tl);
}
static bool trans_or(DisasContext *ctx, arg_or *a)
{
return gen_logic(ctx, a, tcg_gen_or_tl);
}
static bool trans_and(DisasContext *ctx, arg_and *a)
{
return gen_logic(ctx, a, tcg_gen_and_tl);
}
static bool trans_addiw(DisasContext *ctx, arg_addiw *a)
{
REQUIRE_64_OR_128BIT(ctx);
ctx->ol = MXL_RV32;
return gen_arith_imm_fn(ctx, a, EXT_NONE, tcg_gen_addi_tl, NULL);
}
static bool trans_slliw(DisasContext *ctx, arg_slliw *a)
{
REQUIRE_64_OR_128BIT(ctx);
ctx->ol = MXL_RV32;
return gen_shift_imm_fn(ctx, a, EXT_NONE, tcg_gen_shli_tl, NULL);
}
static bool trans_srliw(DisasContext *ctx, arg_srliw *a)
{
REQUIRE_64_OR_128BIT(ctx);
ctx->ol = MXL_RV32;
return gen_shift_imm_fn(ctx, a, EXT_NONE, gen_srliw, NULL);
}
static bool trans_sraiw(DisasContext *ctx, arg_sraiw *a)
{
REQUIRE_64_OR_128BIT(ctx);
ctx->ol = MXL_RV32;
return gen_shift_imm_fn(ctx, a, EXT_NONE, gen_sraiw, NULL);
}
static bool trans_sllid(DisasContext *ctx, arg_sllid *a)
{
REQUIRE_128BIT(ctx);
ctx->ol = MXL_RV64;
return gen_shift_imm_fn(ctx, a, EXT_NONE, tcg_gen_shli_tl, NULL);
}
static bool trans_srlid(DisasContext *ctx, arg_srlid *a)
{
REQUIRE_128BIT(ctx);
ctx->ol = MXL_RV64;
return gen_shift_imm_fn(ctx, a, EXT_NONE, tcg_gen_shri_tl, NULL);
}
static bool trans_sraid(DisasContext *ctx, arg_sraid *a)
{
REQUIRE_128BIT(ctx);
ctx->ol = MXL_RV64;
return gen_shift_imm_fn(ctx, a, EXT_NONE, tcg_gen_sari_tl, NULL);
}
static bool trans_addw(DisasContext *ctx, arg_addw *a)
{
REQUIRE_64_OR_128BIT(ctx);
ctx->ol = MXL_RV32;
return gen_arith(ctx, a, EXT_NONE, tcg_gen_add_tl, NULL);
}
static bool trans_subw(DisasContext *ctx, arg_subw *a)
{
REQUIRE_64_OR_128BIT(ctx);
ctx->ol = MXL_RV32;
return gen_arith(ctx, a, EXT_NONE, tcg_gen_sub_tl, NULL);
}
static bool trans_sllw(DisasContext *ctx, arg_sllw *a)
{
REQUIRE_64_OR_128BIT(ctx);
ctx->ol = MXL_RV32;
return gen_shift(ctx, a, EXT_NONE, tcg_gen_shl_tl, NULL);
}
static bool trans_srlw(DisasContext *ctx, arg_srlw *a)
{
REQUIRE_64_OR_128BIT(ctx);
ctx->ol = MXL_RV32;
return gen_shift(ctx, a, EXT_ZERO, tcg_gen_shr_tl, NULL);
}
static bool trans_sraw(DisasContext *ctx, arg_sraw *a)
{
REQUIRE_64_OR_128BIT(ctx);
ctx->ol = MXL_RV32;
return gen_shift(ctx, a, EXT_SIGN, tcg_gen_sar_tl, NULL);
}
static bool trans_slld(DisasContext *ctx, arg_slld *a)
{
REQUIRE_128BIT(ctx);
ctx->ol = MXL_RV64;
return gen_shift(ctx, a, EXT_NONE, tcg_gen_shl_tl, NULL);
}
static bool trans_srld(DisasContext *ctx, arg_srld *a)
{
REQUIRE_128BIT(ctx);
ctx->ol = MXL_RV64;
return gen_shift(ctx, a, EXT_ZERO, tcg_gen_shr_tl, NULL);
}
static bool trans_srad(DisasContext *ctx, arg_srad *a)
{
REQUIRE_128BIT(ctx);
ctx->ol = MXL_RV64;
return gen_shift(ctx, a, EXT_SIGN, tcg_gen_sar_tl, NULL);
}
static bool trans_fence(DisasContext *ctx, arg_fence *a)
{
/* FENCE is a full memory barrier. */
tcg_gen_mb(TCG_MO_ALL | TCG_BAR_SC);
return true;
}
static bool trans_fence_i(DisasContext *ctx, arg_fence_i *a)
{
if (!ctx->cfg_ptr->ext_ifencei) {
return false;
}
/*
* FENCE_I is a no-op in QEMU,
* however we need to end the translation block
*/
gen_set_pc_imm(ctx, ctx->pc_succ_insn);
tcg_gen_exit_tb(NULL, 0);
ctx->base.is_jmp = DISAS_NORETURN;
return true;
}
static bool do_csr_post(DisasContext *ctx)
{
/* The helper may raise ILLEGAL_INSN -- record binv for unwind. */
decode_save_opc(ctx);
/* We may have changed important cpu state -- exit to main loop. */
gen_set_pc_imm(ctx, ctx->pc_succ_insn);
tcg_gen_exit_tb(NULL, 0);
ctx->base.is_jmp = DISAS_NORETURN;
return true;
}
static bool do_csrr(DisasContext *ctx, int rd, int rc)
{
TCGv dest = dest_gpr(ctx, rd);
TCGv_i32 csr = tcg_constant_i32(rc);
if (tb_cflags(ctx->base.tb) & CF_USE_ICOUNT) {
gen_io_start();
}
gen_helper_csrr(dest, cpu_env, csr);
gen_set_gpr(ctx, rd, dest);
return do_csr_post(ctx);
}
static bool do_csrw(DisasContext *ctx, int rc, TCGv src)
{
TCGv_i32 csr = tcg_constant_i32(rc);
if (tb_cflags(ctx->base.tb) & CF_USE_ICOUNT) {
gen_io_start();
}
gen_helper_csrw(cpu_env, csr, src);
return do_csr_post(ctx);
}
static bool do_csrrw(DisasContext *ctx, int rd, int rc, TCGv src, TCGv mask)
{
TCGv dest = dest_gpr(ctx, rd);
TCGv_i32 csr = tcg_constant_i32(rc);
if (tb_cflags(ctx->base.tb) & CF_USE_ICOUNT) {
gen_io_start();
}
gen_helper_csrrw(dest, cpu_env, csr, src, mask);
gen_set_gpr(ctx, rd, dest);
return do_csr_post(ctx);
}
static bool do_csrr_i128(DisasContext *ctx, int rd, int rc)
{
TCGv destl = dest_gpr(ctx, rd);
TCGv desth = dest_gprh(ctx, rd);
TCGv_i32 csr = tcg_constant_i32(rc);
if (tb_cflags(ctx->base.tb) & CF_USE_ICOUNT) {
gen_io_start();
}
gen_helper_csrr_i128(destl, cpu_env, csr);
tcg_gen_ld_tl(desth, cpu_env, offsetof(CPURISCVState, retxh));
gen_set_gpr128(ctx, rd, destl, desth);
return do_csr_post(ctx);
}
static bool do_csrw_i128(DisasContext *ctx, int rc, TCGv srcl, TCGv srch)
{
TCGv_i32 csr = tcg_constant_i32(rc);
if (tb_cflags(ctx->base.tb) & CF_USE_ICOUNT) {
gen_io_start();
}
gen_helper_csrw_i128(cpu_env, csr, srcl, srch);
return do_csr_post(ctx);
}
static bool do_csrrw_i128(DisasContext *ctx, int rd, int rc,
TCGv srcl, TCGv srch, TCGv maskl, TCGv maskh)
{
TCGv destl = dest_gpr(ctx, rd);
TCGv desth = dest_gprh(ctx, rd);
TCGv_i32 csr = tcg_constant_i32(rc);
if (tb_cflags(ctx->base.tb) & CF_USE_ICOUNT) {
gen_io_start();
}
gen_helper_csrrw_i128(destl, cpu_env, csr, srcl, srch, maskl, maskh);
tcg_gen_ld_tl(desth, cpu_env, offsetof(CPURISCVState, retxh));
gen_set_gpr128(ctx, rd, destl, desth);
return do_csr_post(ctx);
}
static bool trans_csrrw(DisasContext *ctx, arg_csrrw *a)
{
RISCVMXL xl = get_xl(ctx);
if (xl < MXL_RV128) {
TCGv src = get_gpr(ctx, a->rs1, EXT_NONE);
/*
* If rd == 0, the insn shall not read the csr, nor cause any of the
* side effects that might occur on a csr read.
*/
if (a->rd == 0) {
return do_csrw(ctx, a->csr, src);
}
TCGv mask = tcg_constant_tl(xl == MXL_RV32 ? UINT32_MAX :
(target_ulong)-1);
return do_csrrw(ctx, a->rd, a->csr, src, mask);
} else {
TCGv srcl = get_gpr(ctx, a->rs1, EXT_NONE);
TCGv srch = get_gprh(ctx, a->rs1);
/*
* If rd == 0, the insn shall not read the csr, nor cause any of the
* side effects that might occur on a csr read.
*/
if (a->rd == 0) {
return do_csrw_i128(ctx, a->csr, srcl, srch);
}
TCGv mask = tcg_constant_tl(-1);
return do_csrrw_i128(ctx, a->rd, a->csr, srcl, srch, mask, mask);
}
}
static bool trans_csrrs(DisasContext *ctx, arg_csrrs *a)
{
/*
* If rs1 == 0, the insn shall not write to the csr at all, nor
* cause any of the side effects that might occur on a csr write.
* Note that if rs1 specifies a register other than x0, holding
* a zero value, the instruction will still attempt to write the
* unmodified value back to the csr and will cause side effects.
*/
if (get_xl(ctx) < MXL_RV128) {
if (a->rs1 == 0) {
return do_csrr(ctx, a->rd, a->csr);
}
TCGv ones = tcg_constant_tl(-1);
TCGv mask = get_gpr(ctx, a->rs1, EXT_ZERO);
return do_csrrw(ctx, a->rd, a->csr, ones, mask);
} else {
if (a->rs1 == 0) {
return do_csrr_i128(ctx, a->rd, a->csr);
}
TCGv ones = tcg_constant_tl(-1);
TCGv maskl = get_gpr(ctx, a->rs1, EXT_ZERO);
TCGv maskh = get_gprh(ctx, a->rs1);
return do_csrrw_i128(ctx, a->rd, a->csr, ones, ones, maskl, maskh);
}
}
static bool trans_csrrc(DisasContext *ctx, arg_csrrc *a)
{
/*
* If rs1 == 0, the insn shall not write to the csr at all, nor
* cause any of the side effects that might occur on a csr write.
* Note that if rs1 specifies a register other than x0, holding
* a zero value, the instruction will still attempt to write the
* unmodified value back to the csr and will cause side effects.
*/
if (get_xl(ctx) < MXL_RV128) {
if (a->rs1 == 0) {
return do_csrr(ctx, a->rd, a->csr);
}
TCGv mask = get_gpr(ctx, a->rs1, EXT_ZERO);
return do_csrrw(ctx, a->rd, a->csr, ctx->zero, mask);
} else {
if (a->rs1 == 0) {
return do_csrr_i128(ctx, a->rd, a->csr);
}
TCGv maskl = get_gpr(ctx, a->rs1, EXT_ZERO);
TCGv maskh = get_gprh(ctx, a->rs1);
return do_csrrw_i128(ctx, a->rd, a->csr,
ctx->zero, ctx->zero, maskl, maskh);
}
}
static bool trans_csrrwi(DisasContext *ctx, arg_csrrwi *a)
{
RISCVMXL xl = get_xl(ctx);
if (xl < MXL_RV128) {
TCGv src = tcg_constant_tl(a->rs1);
/*
* If rd == 0, the insn shall not read the csr, nor cause any of the
* side effects that might occur on a csr read.
*/
if (a->rd == 0) {
return do_csrw(ctx, a->csr, src);
}
TCGv mask = tcg_constant_tl(xl == MXL_RV32 ? UINT32_MAX :
(target_ulong)-1);
return do_csrrw(ctx, a->rd, a->csr, src, mask);
} else {
TCGv src = tcg_constant_tl(a->rs1);
/*
* If rd == 0, the insn shall not read the csr, nor cause any of the
* side effects that might occur on a csr read.
*/
if (a->rd == 0) {
return do_csrw_i128(ctx, a->csr, src, ctx->zero);
}
TCGv mask = tcg_constant_tl(-1);
return do_csrrw_i128(ctx, a->rd, a->csr, src, ctx->zero, mask, mask);
}
}
static bool trans_csrrsi(DisasContext *ctx, arg_csrrsi *a)
{
/*
* If rs1 == 0, the insn shall not write to the csr at all, nor
* cause any of the side effects that might occur on a csr write.
* Note that if rs1 specifies a register other than x0, holding
* a zero value, the instruction will still attempt to write the
* unmodified value back to the csr and will cause side effects.
*/
if (get_xl(ctx) < MXL_RV128) {
if (a->rs1 == 0) {
return do_csrr(ctx, a->rd, a->csr);
}
TCGv ones = tcg_constant_tl(-1);
TCGv mask = tcg_constant_tl(a->rs1);
return do_csrrw(ctx, a->rd, a->csr, ones, mask);
} else {
if (a->rs1 == 0) {
return do_csrr_i128(ctx, a->rd, a->csr);
}
TCGv ones = tcg_constant_tl(-1);
TCGv mask = tcg_constant_tl(a->rs1);
return do_csrrw_i128(ctx, a->rd, a->csr, ones, ones, mask, ctx->zero);
}
}
static bool trans_csrrci(DisasContext *ctx, arg_csrrci * a)
{
/*
* If rs1 == 0, the insn shall not write to the csr at all, nor
* cause any of the side effects that might occur on a csr write.
* Note that if rs1 specifies a register other than x0, holding
* a zero value, the instruction will still attempt to write the
* unmodified value back to the csr and will cause side effects.
*/
if (get_xl(ctx) < MXL_RV128) {
if (a->rs1 == 0) {
return do_csrr(ctx, a->rd, a->csr);
}
TCGv mask = tcg_constant_tl(a->rs1);
return do_csrrw(ctx, a->rd, a->csr, ctx->zero, mask);
} else {
if (a->rs1 == 0) {
return do_csrr_i128(ctx, a->rd, a->csr);
}
TCGv mask = tcg_constant_tl(a->rs1);
return do_csrrw_i128(ctx, a->rd, a->csr,
ctx->zero, ctx->zero, mask, ctx->zero);
}
}
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