2 * Power ISA decode for Fixed-Point Facility instructions
4 * Copyright (c) 2021 Instituto de Pesquisas Eldorado (eldorado.org.br)
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
21 * Fixed-Point Load/Store Instructions
24 static bool do_ldst(DisasContext *ctx, int rt, int ra, TCGv displ, bool update,
25 bool store, MemOp mop)
29 if (update && (ra == 0 || (!store && ra == rt))) {
33 gen_set_access_type(ctx, ACCESS_INT);
35 ea = do_ea_calc(ctx, ra, displ);
36 mop ^= ctx->default_tcg_memop_mask;
38 tcg_gen_qemu_st_tl(cpu_gpr[rt], ea, ctx->mem_idx, mop);
40 tcg_gen_qemu_ld_tl(cpu_gpr[rt], ea, ctx->mem_idx, mop);
43 tcg_gen_mov_tl(cpu_gpr[ra], ea);
48 static bool do_ldst_D(DisasContext *ctx, arg_D *a, bool update, bool store,
51 return do_ldst(ctx, a->rt, a->ra, tcg_constant_tl(a->si), update, store, mop);
54 static bool do_ldst_PLS_D(DisasContext *ctx, arg_PLS_D *a, bool update,
55 bool store, MemOp mop)
58 if (!resolve_PLS_D(ctx, &d, a)) {
61 return do_ldst_D(ctx, &d, update, store, mop);
64 static bool do_ldst_X(DisasContext *ctx, arg_X *a, bool update,
65 bool store, MemOp mop)
67 return do_ldst(ctx, a->rt, a->ra, cpu_gpr[a->rb], update, store, mop);
70 static bool do_ldst_quad(DisasContext *ctx, arg_D *a, bool store, bool prefixed)
72 #if defined(TARGET_PPC64)
74 TCGv_i64 low_addr_gpr, high_addr_gpr;
77 REQUIRE_INSNS_FLAGS(ctx, 64BX);
79 if (!prefixed && !(ctx->insns_flags2 & PPC2_LSQ_ISA207)) {
80 /* lq and stq were privileged prior to V. 2.07 */
89 if (!store && unlikely(a->ra == a->rt)) {
94 gen_set_access_type(ctx, ACCESS_INT);
95 ea = do_ea_calc(ctx, a->ra, tcg_constant_tl(a->si));
97 if (prefixed || !ctx->le_mode) {
98 low_addr_gpr = cpu_gpr[a->rt];
99 high_addr_gpr = cpu_gpr[a->rt + 1];
101 low_addr_gpr = cpu_gpr[a->rt + 1];
102 high_addr_gpr = cpu_gpr[a->rt];
104 t16 = tcg_temp_new_i128();
107 tcg_gen_concat_i64_i128(t16, low_addr_gpr, high_addr_gpr);
108 tcg_gen_qemu_st_i128(t16, ea, ctx->mem_idx, DEF_MEMOP(MO_128));
110 tcg_gen_qemu_ld_i128(t16, ea, ctx->mem_idx, DEF_MEMOP(MO_128));
111 tcg_gen_extr_i128_i64(low_addr_gpr, high_addr_gpr, t16);
114 qemu_build_not_reached();
120 static bool do_ldst_quad_PLS_D(DisasContext *ctx, arg_PLS_D *a, bool store)
123 if (!resolve_PLS_D(ctx, &d, a)) {
127 return do_ldst_quad(ctx, &d, store, true);
130 /* Load Byte and Zero */
131 TRANS(LBZ, do_ldst_D, false, false, MO_UB)
132 TRANS(LBZX, do_ldst_X, false, false, MO_UB)
133 TRANS(LBZU, do_ldst_D, true, false, MO_UB)
134 TRANS(LBZUX, do_ldst_X, true, false, MO_UB)
135 TRANS(PLBZ, do_ldst_PLS_D, false, false, MO_UB)
137 /* Load Halfword and Zero */
138 TRANS(LHZ, do_ldst_D, false, false, MO_UW)
139 TRANS(LHZX, do_ldst_X, false, false, MO_UW)
140 TRANS(LHZU, do_ldst_D, true, false, MO_UW)
141 TRANS(LHZUX, do_ldst_X, true, false, MO_UW)
142 TRANS(PLHZ, do_ldst_PLS_D, false, false, MO_UW)
144 /* Load Halfword Algebraic */
145 TRANS(LHA, do_ldst_D, false, false, MO_SW)
146 TRANS(LHAX, do_ldst_X, false, false, MO_SW)
147 TRANS(LHAU, do_ldst_D, true, false, MO_SW)
148 TRANS(LHAXU, do_ldst_X, true, false, MO_SW)
149 TRANS(PLHA, do_ldst_PLS_D, false, false, MO_SW)
151 /* Load Word and Zero */
152 TRANS(LWZ, do_ldst_D, false, false, MO_UL)
153 TRANS(LWZX, do_ldst_X, false, false, MO_UL)
154 TRANS(LWZU, do_ldst_D, true, false, MO_UL)
155 TRANS(LWZUX, do_ldst_X, true, false, MO_UL)
156 TRANS(PLWZ, do_ldst_PLS_D, false, false, MO_UL)
158 /* Load Word Algebraic */
159 TRANS64(LWA, do_ldst_D, false, false, MO_SL)
160 TRANS64(LWAX, do_ldst_X, false, false, MO_SL)
161 TRANS64(LWAUX, do_ldst_X, true, false, MO_SL)
162 TRANS64(PLWA, do_ldst_PLS_D, false, false, MO_SL)
164 /* Load Doubleword */
165 TRANS64(LD, do_ldst_D, false, false, MO_UQ)
166 TRANS64(LDX, do_ldst_X, false, false, MO_UQ)
167 TRANS64(LDU, do_ldst_D, true, false, MO_UQ)
168 TRANS64(LDUX, do_ldst_X, true, false, MO_UQ)
169 TRANS64(PLD, do_ldst_PLS_D, false, false, MO_UQ)
172 TRANS64(LQ, do_ldst_quad, false, false);
173 TRANS64(PLQ, do_ldst_quad_PLS_D, false);
176 TRANS(STB, do_ldst_D, false, true, MO_UB)
177 TRANS(STBX, do_ldst_X, false, true, MO_UB)
178 TRANS(STBU, do_ldst_D, true, true, MO_UB)
179 TRANS(STBUX, do_ldst_X, true, true, MO_UB)
180 TRANS(PSTB, do_ldst_PLS_D, false, true, MO_UB)
183 TRANS(STH, do_ldst_D, false, true, MO_UW)
184 TRANS(STHX, do_ldst_X, false, true, MO_UW)
185 TRANS(STHU, do_ldst_D, true, true, MO_UW)
186 TRANS(STHUX, do_ldst_X, true, true, MO_UW)
187 TRANS(PSTH, do_ldst_PLS_D, false, true, MO_UW)
190 TRANS(STW, do_ldst_D, false, true, MO_UL)
191 TRANS(STWX, do_ldst_X, false, true, MO_UL)
192 TRANS(STWU, do_ldst_D, true, true, MO_UL)
193 TRANS(STWUX, do_ldst_X, true, true, MO_UL)
194 TRANS(PSTW, do_ldst_PLS_D, false, true, MO_UL)
196 /* Store Doubleword */
197 TRANS64(STD, do_ldst_D, false, true, MO_UQ)
198 TRANS64(STDX, do_ldst_X, false, true, MO_UQ)
199 TRANS64(STDU, do_ldst_D, true, true, MO_UQ)
200 TRANS64(STDUX, do_ldst_X, true, true, MO_UQ)
201 TRANS64(PSTD, do_ldst_PLS_D, false, true, MO_UQ)
204 TRANS64(STQ, do_ldst_quad, true, false);
205 TRANS64(PSTQ, do_ldst_quad_PLS_D, true);
208 * Fixed-Point Compare Instructions
211 static bool do_cmp_X(DisasContext *ctx, arg_X_bfl *a, bool s)
213 if ((ctx->insns_flags & PPC_64B) == 0) {
215 * For 32-bit implementations, The Programming Environments Manual says
216 * that "the L field must be cleared, otherwise the instruction form is
217 * invalid." It seems, however, that most 32-bit CPUs ignore invalid
218 * forms (e.g., section "Instruction Formats" of the 405 and 440
219 * manuals, "Integer Compare Instructions" of the 601 manual), with the
220 * notable exception of the e500 and e500mc, where L=1 was reported to
221 * cause an exception.
224 if ((ctx->insns_flags2 & PPC2_BOOKE206)) {
226 * For 32-bit Book E v2.06 implementations (i.e. e500/e500mc),
227 * generate an illegal instruction exception.
231 qemu_log_mask(LOG_GUEST_ERROR,
232 "Invalid form of CMP%s at 0x" TARGET_FMT_lx ", L = 1\n",
233 s ? "" : "L", ctx->cia);
236 gen_op_cmp32(cpu_gpr[a->ra], cpu_gpr[a->rb], s, a->bf);
240 /* For 64-bit implementations, deal with bit L accordingly. */
242 gen_op_cmp(cpu_gpr[a->ra], cpu_gpr[a->rb], s, a->bf);
244 gen_op_cmp32(cpu_gpr[a->ra], cpu_gpr[a->rb], s, a->bf);
249 static bool do_cmp_D(DisasContext *ctx, arg_D_bf *a, bool s)
251 if ((ctx->insns_flags & PPC_64B) == 0) {
253 * For 32-bit implementations, The Programming Environments Manual says
254 * that "the L field must be cleared, otherwise the instruction form is
255 * invalid." It seems, however, that most 32-bit CPUs ignore invalid
256 * forms (e.g., section "Instruction Formats" of the 405 and 440
257 * manuals, "Integer Compare Instructions" of the 601 manual), with the
258 * notable exception of the e500 and e500mc, where L=1 was reported to
259 * cause an exception.
262 if ((ctx->insns_flags2 & PPC2_BOOKE206)) {
264 * For 32-bit Book E v2.06 implementations (i.e. e500/e500mc),
265 * generate an illegal instruction exception.
269 qemu_log_mask(LOG_GUEST_ERROR,
270 "Invalid form of CMP%s at 0x" TARGET_FMT_lx ", L = 1\n",
271 s ? "I" : "LI", ctx->cia);
274 gen_op_cmp32(cpu_gpr[a->ra], tcg_constant_tl(a->imm), s, a->bf);
278 /* For 64-bit implementations, deal with bit L accordingly. */
280 gen_op_cmp(cpu_gpr[a->ra], tcg_constant_tl(a->imm), s, a->bf);
282 gen_op_cmp32(cpu_gpr[a->ra], tcg_constant_tl(a->imm), s, a->bf);
287 TRANS(CMP, do_cmp_X, true);
288 TRANS(CMPL, do_cmp_X, false);
289 TRANS(CMPI, do_cmp_D, true);
290 TRANS(CMPLI, do_cmp_D, false);
293 * Fixed-Point Arithmetic Instructions
296 static bool trans_ADDI(DisasContext *ctx, arg_D *a)
299 tcg_gen_addi_tl(cpu_gpr[a->rt], cpu_gpr[a->ra], a->si);
301 tcg_gen_movi_tl(cpu_gpr[a->rt], a->si);
306 static bool trans_PADDI(DisasContext *ctx, arg_PLS_D *a)
309 if (!resolve_PLS_D(ctx, &d, a)) {
312 return trans_ADDI(ctx, &d);
315 static bool trans_ADDIS(DisasContext *ctx, arg_D *a)
318 return trans_ADDI(ctx, a);
321 static bool trans_ADDPCIS(DisasContext *ctx, arg_DX *a)
323 REQUIRE_INSNS_FLAGS2(ctx, ISA300);
324 tcg_gen_movi_tl(cpu_gpr[a->rt], ctx->base.pc_next + (a->d << 16));
328 static bool trans_INVALID(DisasContext *ctx, arg_INVALID *a)
334 static bool trans_PNOP(DisasContext *ctx, arg_PNOP *a)
339 static bool do_set_bool_cond(DisasContext *ctx, arg_X_bi *a, bool neg, bool rev)
341 REQUIRE_INSNS_FLAGS2(ctx, ISA310);
342 uint32_t mask = 0x08 >> (a->bi & 0x03);
343 TCGCond cond = rev ? TCG_COND_EQ : TCG_COND_NE;
344 TCGv temp = tcg_temp_new();
345 TCGv zero = tcg_constant_tl(0);
347 tcg_gen_extu_i32_tl(temp, cpu_crf[a->bi >> 2]);
348 tcg_gen_andi_tl(temp, temp, mask);
350 tcg_gen_negsetcond_tl(cond, cpu_gpr[a->rt], temp, zero);
352 tcg_gen_setcond_tl(cond, cpu_gpr[a->rt], temp, zero);
357 TRANS(SETBC, do_set_bool_cond, false, false)
358 TRANS(SETBCR, do_set_bool_cond, false, true)
359 TRANS(SETNBC, do_set_bool_cond, true, false)
360 TRANS(SETNBCR, do_set_bool_cond, true, true)
362 static bool trans_CFUGED(DisasContext *ctx, arg_X *a)
365 REQUIRE_INSNS_FLAGS2(ctx, ISA310);
366 #if defined(TARGET_PPC64)
367 gen_helper_CFUGED(cpu_gpr[a->ra], cpu_gpr[a->rt], cpu_gpr[a->rb]);
369 qemu_build_not_reached();
374 static void do_cntzdm(TCGv_i64 dst, TCGv_i64 src, TCGv_i64 mask, int64_t trail)
378 t0 = tcg_temp_new_i64();
379 t1 = tcg_temp_new_i64();
381 tcg_gen_and_i64(t0, src, mask);
383 tcg_gen_ctzi_i64(t0, t0, -1);
385 tcg_gen_clzi_i64(t0, t0, -1);
388 tcg_gen_setcondi_i64(TCG_COND_NE, t1, t0, -1);
389 tcg_gen_andi_i64(t0, t0, 63);
390 tcg_gen_xori_i64(t0, t0, 63);
392 tcg_gen_shl_i64(t0, mask, t0);
393 tcg_gen_shl_i64(t0, t0, t1);
395 tcg_gen_shr_i64(t0, mask, t0);
396 tcg_gen_shr_i64(t0, t0, t1);
399 tcg_gen_ctpop_i64(dst, t0);
402 static bool trans_CNTLZDM(DisasContext *ctx, arg_X *a)
405 REQUIRE_INSNS_FLAGS2(ctx, ISA310);
406 #if defined(TARGET_PPC64)
407 do_cntzdm(cpu_gpr[a->ra], cpu_gpr[a->rt], cpu_gpr[a->rb], false);
409 qemu_build_not_reached();
414 static bool trans_CNTTZDM(DisasContext *ctx, arg_X *a)
417 REQUIRE_INSNS_FLAGS2(ctx, ISA310);
418 #if defined(TARGET_PPC64)
419 do_cntzdm(cpu_gpr[a->ra], cpu_gpr[a->rt], cpu_gpr[a->rb], true);
421 qemu_build_not_reached();
426 static bool trans_PDEPD(DisasContext *ctx, arg_X *a)
429 REQUIRE_INSNS_FLAGS2(ctx, ISA310);
430 #if defined(TARGET_PPC64)
431 gen_helper_PDEPD(cpu_gpr[a->ra], cpu_gpr[a->rt], cpu_gpr[a->rb]);
433 qemu_build_not_reached();
438 static bool trans_PEXTD(DisasContext *ctx, arg_X *a)
441 REQUIRE_INSNS_FLAGS2(ctx, ISA310);
442 #if defined(TARGET_PPC64)
443 gen_helper_PEXTD(cpu_gpr[a->ra], cpu_gpr[a->rt], cpu_gpr[a->rb]);
445 qemu_build_not_reached();
450 static bool trans_ADDG6S(DisasContext *ctx, arg_X *a)
452 const target_ulong carry_bits = (target_ulong)-1 / 0xf;
453 TCGv in1, in2, carryl, carryh, tmp;
454 TCGv zero = tcg_constant_tl(0);
456 REQUIRE_INSNS_FLAGS2(ctx, BCDA_ISA206);
458 in1 = cpu_gpr[a->ra];
459 in2 = cpu_gpr[a->rb];
460 tmp = tcg_temp_new();
461 carryl = tcg_temp_new();
462 carryh = tcg_temp_new();
464 /* Addition with carry. */
465 tcg_gen_add2_tl(carryl, carryh, in1, zero, in2, zero);
466 /* Addition without carry. */
467 tcg_gen_xor_tl(tmp, in1, in2);
468 /* Difference between the two is carry in to each bit. */
469 tcg_gen_xor_tl(carryl, carryl, tmp);
472 * The carry-out that we're looking for is the carry-in to
473 * the next nibble. Shift the double-word down one nibble,
474 * which puts all of the bits back into one word.
476 tcg_gen_extract2_tl(carryl, carryl, carryh, 4);
478 /* Invert, isolate the carry bits, and produce 6's. */
479 tcg_gen_andc_tl(carryl, tcg_constant_tl(carry_bits), carryl);
480 tcg_gen_muli_tl(cpu_gpr[a->rt], carryl, 6);
484 static bool trans_CDTBCD(DisasContext *ctx, arg_X_sa *a)
486 REQUIRE_INSNS_FLAGS2(ctx, BCDA_ISA206);
487 gen_helper_CDTBCD(cpu_gpr[a->ra], cpu_gpr[a->rs]);
491 static bool trans_CBCDTD(DisasContext *ctx, arg_X_sa *a)
493 REQUIRE_INSNS_FLAGS2(ctx, BCDA_ISA206);
494 gen_helper_CBCDTD(cpu_gpr[a->ra], cpu_gpr[a->rs]);
498 static bool do_hash(DisasContext *ctx, arg_X *a, bool priv,
499 void (*helper)(TCGv_ptr, TCGv, TCGv, TCGv))
503 if (!(ctx->insns_flags2 & PPC2_ISA310)) {
504 /* if version is before v3.1, this operation is a nop */
509 /* if instruction is privileged but the context is in user space */
513 if (unlikely(a->ra == 0)) {
514 /* if RA=0, the instruction form is invalid */
519 ea = do_ea_calc(ctx, a->ra, tcg_constant_tl(a->rt));
520 helper(cpu_env, ea, cpu_gpr[a->ra], cpu_gpr[a->rb]);
524 TRANS(HASHST, do_hash, false, gen_helper_HASHST)
525 TRANS(HASHCHK, do_hash, false, gen_helper_HASHCHK)
526 TRANS(HASHSTP, do_hash, true, gen_helper_HASHSTP)
527 TRANS(HASHCHKP, do_hash, true, gen_helper_HASHCHKP)