target/ppc/translate/fixedpoint-impl.c.inc - qemu - Git at Google

 /*
  * Power ISA decode for Fixed-Point Facility instructions
  *
  * Copyright (c) 2021 Instituto de Pesquisas Eldorado (eldorado.org.br)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  */

 /*
  * Incorporate CIA into the constant when R=1.
  * Validate that when R=1, RA=0.
  */
 static bool resolve_PLS_D(DisasContext *ctx, arg_D *d, arg_PLS_D *a)
 {
     d->rt = a->rt;
     d->ra = a->ra;
     d->si = a->si;
     if (a->r) {
         if (unlikely(a->ra != 0)) {
             gen_invalid(ctx);
             return false;
         }
         d->si += ctx->cia;
     }
     return true;
 }

 /*
  * Fixed-Point Load/Store Instructions
  */

 static bool do_ldst(DisasContext *ctx, int rt, int ra, TCGv displ, bool update,
                     bool store, MemOp mop)
 {
     TCGv ea;

     if (update && (ra == 0 || (!store && ra == rt))) {
         gen_invalid(ctx);
         return true;
     }
     gen_set_access_type(ctx, ACCESS_INT);

     ea = tcg_temp_new();
     if (ra) {
         tcg_gen_add_tl(ea, cpu_gpr[ra], displ);
     } else {
         tcg_gen_mov_tl(ea, displ);
     }
     if (NARROW_MODE(ctx)) {
         tcg_gen_ext32u_tl(ea, ea);
     }
     mop ^= ctx->default_tcg_memop_mask;
     if (store) {
         tcg_gen_qemu_st_tl(cpu_gpr[rt], ea, ctx->mem_idx, mop);
     } else {
         tcg_gen_qemu_ld_tl(cpu_gpr[rt], ea, ctx->mem_idx, mop);
     }
     if (update) {
         tcg_gen_mov_tl(cpu_gpr[ra], ea);
     }
     tcg_temp_free(ea);

     return true;
 }

 static bool do_ldst_D(DisasContext *ctx, arg_D *a, bool update, bool store,
                       MemOp mop)
 {
     return do_ldst(ctx, a->rt, a->ra, tcg_constant_tl(a->si), update, store, mop);
 }

 static bool do_ldst_PLS_D(DisasContext *ctx, arg_PLS_D *a, bool update,
                           bool store, MemOp mop)
 {
     arg_D d;
     if (!resolve_PLS_D(ctx, &d, a)) {
         return true;
     }
     return do_ldst_D(ctx, &d, update, store, mop);
 }

 static bool do_ldst_X(DisasContext *ctx, arg_X *a, bool update,
                       bool store, MemOp mop)
 {
     return do_ldst(ctx, a->rt, a->ra, cpu_gpr[a->rb], update, store, mop);
 }

 /* Load Byte and Zero */
 TRANS(LBZ, do_ldst_D, false, false, MO_UB)
 TRANS(LBZX, do_ldst_X, false, false, MO_UB)
 TRANS(LBZU, do_ldst_D, true, false, MO_UB)
 TRANS(LBZUX, do_ldst_X, true, false, MO_UB)
 TRANS(PLBZ, do_ldst_PLS_D, false, false, MO_UB)

 /* Load Halfword and Zero */
 TRANS(LHZ, do_ldst_D, false, false, MO_UW)
 TRANS(LHZX, do_ldst_X, false, false, MO_UW)
 TRANS(LHZU, do_ldst_D, true, false, MO_UW)
 TRANS(LHZUX, do_ldst_X, true, false, MO_UW)
 TRANS(PLHZ, do_ldst_PLS_D, false, false, MO_UW)

 /* Load Halfword Algebraic */
 TRANS(LHA, do_ldst_D, false, false, MO_SW)
 TRANS(LHAX, do_ldst_X, false, false, MO_SW)
 TRANS(LHAU, do_ldst_D, true, false, MO_SW)
 TRANS(LHAXU, do_ldst_X, true, false, MO_SW)
 TRANS(PLHA, do_ldst_PLS_D, false, false, MO_SW)

 /* Load Word and Zero */
 TRANS(LWZ, do_ldst_D, false, false, MO_UL)
 TRANS(LWZX, do_ldst_X, false, false, MO_UL)
 TRANS(LWZU, do_ldst_D, true, false, MO_UL)
 TRANS(LWZUX, do_ldst_X, true, false, MO_UL)
 TRANS(PLWZ, do_ldst_PLS_D, false, false, MO_UL)

 /* Load Word Algebraic */
 TRANS64(LWA, do_ldst_D, false, false, MO_SL)
 TRANS64(LWAX, do_ldst_X, false, false, MO_SL)
 TRANS64(LWAUX, do_ldst_X, true, false, MO_SL)
 TRANS64(PLWA, do_ldst_PLS_D, false, false, MO_SL)

 /* Load Doubleword */
 TRANS64(LD, do_ldst_D, false, false, MO_Q)
 TRANS64(LDX, do_ldst_X, false, false, MO_Q)
 TRANS64(LDU, do_ldst_D, true, false, MO_Q)
 TRANS64(LDUX, do_ldst_X, true, false, MO_Q)
 TRANS64(PLD, do_ldst_PLS_D, false, false, MO_Q)

 /* Store Byte */
 TRANS(STB, do_ldst_D, false, true, MO_UB)
 TRANS(STBX, do_ldst_X, false, true, MO_UB)
 TRANS(STBU, do_ldst_D, true, true, MO_UB)
 TRANS(STBUX, do_ldst_X, true, true, MO_UB)
 TRANS(PSTB, do_ldst_PLS_D, false, true, MO_UB)

 /* Store Halfword */
 TRANS(STH, do_ldst_D, false, true, MO_UW)
 TRANS(STHX, do_ldst_X, false, true, MO_UW)
 TRANS(STHU, do_ldst_D, true, true, MO_UW)
 TRANS(STHUX, do_ldst_X, true, true, MO_UW)
 TRANS(PSTH, do_ldst_PLS_D, false, true, MO_UW)

 /* Store Word */
 TRANS(STW, do_ldst_D, false, true, MO_UL)
 TRANS(STWX, do_ldst_X, false, true, MO_UL)
 TRANS(STWU, do_ldst_D, true, true, MO_UL)
 TRANS(STWUX, do_ldst_X, true, true, MO_UL)
 TRANS(PSTW, do_ldst_PLS_D, false, true, MO_UL)

 /* Store Doubleword */
 TRANS64(STD, do_ldst_D, false, true, MO_Q)
 TRANS64(STDX, do_ldst_X, false, true, MO_Q)
 TRANS64(STDU, do_ldst_D, true, true, MO_Q)
 TRANS64(STDUX, do_ldst_X, true, true, MO_Q)
 TRANS64(PSTD, do_ldst_PLS_D, false, true, MO_Q)

 /*
  * Fixed-Point Compare Instructions
  */

 static bool do_cmp_X(DisasContext *ctx, arg_X_bfl *a, bool s)
 {
     if ((ctx->insns_flags & PPC_64B) == 0) {
         /*
          * For 32-bit implementations, The Programming Environments Manual says
          * that "the L field must be cleared, otherwise the instruction form is
          * invalid." It seems, however, that most 32-bit CPUs ignore invalid
          * forms (e.g., section "Instruction Formats" of the 405 and 440
          * manuals, "Integer Compare Instructions" of the 601 manual), with the
          * notable exception of the e500 and e500mc, where L=1 was reported to
          * cause an exception.
          */
         if (a->l) {
             if ((ctx->insns_flags2 & PPC2_BOOKE206)) {
                 /*
                  * For 32-bit Book E v2.06 implementations (i.e. e500/e500mc),
                  * generate an illegal instruction exception.
                  */
                 return false;
             } else {
                 qemu_log_mask(LOG_GUEST_ERROR,
                         "Invalid form of CMP%s at 0x" TARGET_FMT_lx ", L = 1\n",
                         s ? "" : "L", ctx->cia);
             }
         }
         gen_op_cmp32(cpu_gpr[a->ra], cpu_gpr[a->rb], s, a->bf);
         return true;
     }

     /* For 64-bit implementations, deal with bit L accordingly. */
     if (a->l) {
         gen_op_cmp(cpu_gpr[a->ra], cpu_gpr[a->rb], s, a->bf);
     } else {
         gen_op_cmp32(cpu_gpr[a->ra], cpu_gpr[a->rb], s, a->bf);
     }
     return true;
 }

 static bool do_cmp_D(DisasContext *ctx, arg_D_bf *a, bool s)
 {
     if ((ctx->insns_flags & PPC_64B) == 0) {
         /*
          * For 32-bit implementations, The Programming Environments Manual says
          * that "the L field must be cleared, otherwise the instruction form is
          * invalid." It seems, however, that most 32-bit CPUs ignore invalid
          * forms (e.g., section "Instruction Formats" of the 405 and 440
          * manuals, "Integer Compare Instructions" of the 601 manual), with the
          * notable exception of the e500 and e500mc, where L=1 was reported to
          * cause an exception.
          */
         if (a->l) {
             if ((ctx->insns_flags2 & PPC2_BOOKE206)) {
                 /*
                  * For 32-bit Book E v2.06 implementations (i.e. e500/e500mc),
                  * generate an illegal instruction exception.
                  */
                 return false;
             } else {
                 qemu_log_mask(LOG_GUEST_ERROR,
                         "Invalid form of CMP%s at 0x" TARGET_FMT_lx ", L = 1\n",
                         s ? "I" : "LI", ctx->cia);
             }
         }
         gen_op_cmp32(cpu_gpr[a->ra], tcg_constant_tl(a->imm), s, a->bf);
         return true;
     }

     /* For 64-bit implementations, deal with bit L accordingly. */
     if (a->l) {
         gen_op_cmp(cpu_gpr[a->ra], tcg_constant_tl(a->imm), s, a->bf);
     } else {
         gen_op_cmp32(cpu_gpr[a->ra], tcg_constant_tl(a->imm), s, a->bf);
     }
     return true;
 }

 TRANS(CMP, do_cmp_X, true);
 TRANS(CMPL, do_cmp_X, false);
 TRANS(CMPI, do_cmp_D, true);
 TRANS(CMPLI, do_cmp_D, false);

 /*
  * Fixed-Point Arithmetic Instructions
  */

 static bool trans_ADDI(DisasContext *ctx, arg_D *a)
 {
     if (a->ra) {
         tcg_gen_addi_tl(cpu_gpr[a->rt], cpu_gpr[a->ra], a->si);
     } else {
         tcg_gen_movi_tl(cpu_gpr[a->rt], a->si);
     }
     return true;
 }

 static bool trans_PADDI(DisasContext *ctx, arg_PLS_D *a)
 {
     arg_D d;
     if (!resolve_PLS_D(ctx, &d, a)) {
         return true;
     }
     return trans_ADDI(ctx, &d);
 }

 static bool trans_ADDIS(DisasContext *ctx, arg_D *a)
 {
     a->si <<= 16;
     return trans_ADDI(ctx, a);
 }

 static bool trans_ADDPCIS(DisasContext *ctx, arg_DX *a)
 {
     REQUIRE_INSNS_FLAGS2(ctx, ISA300);
     tcg_gen_movi_tl(cpu_gpr[a->rt], ctx->base.pc_next + (a->d << 16));
     return true;
 }

 static bool trans_INVALID(DisasContext *ctx, arg_INVALID *a)
 {
     gen_invalid(ctx);
     return true;
 }

 static bool trans_PNOP(DisasContext *ctx, arg_PNOP *a)
 {
     return true;
 }

 static bool do_set_bool_cond(DisasContext *ctx, arg_X_bi *a, bool neg, bool rev)
 {
     REQUIRE_INSNS_FLAGS2(ctx, ISA310);
     uint32_t mask = 0x08 >> (a->bi & 0x03);
     TCGCond cond = rev ? TCG_COND_EQ : TCG_COND_NE;
     TCGv temp = tcg_temp_new();

     tcg_gen_extu_i32_tl(temp, cpu_crf[a->bi >> 2]);
     tcg_gen_andi_tl(temp, temp, mask);
     tcg_gen_setcondi_tl(cond, cpu_gpr[a->rt], temp, 0);
     if (neg) {
         tcg_gen_neg_tl(cpu_gpr[a->rt], cpu_gpr[a->rt]);
     }
     tcg_temp_free(temp);

     return true;
 }

 TRANS(SETBC, do_set_bool_cond, false, false)
 TRANS(SETBCR, do_set_bool_cond, false, true)
 TRANS(SETNBC, do_set_bool_cond, true, false)
 TRANS(SETNBCR, do_set_bool_cond, true, true)

 static bool trans_CFUGED(DisasContext *ctx, arg_X *a)
 {
     REQUIRE_64BIT(ctx);
     REQUIRE_INSNS_FLAGS2(ctx, ISA310);
 #if defined(TARGET_PPC64)
     gen_helper_cfuged(cpu_gpr[a->ra], cpu_gpr[a->rt], cpu_gpr[a->rb]);
 #else
     qemu_build_not_reached();
 #endif
     return true;
 }
	/*
	* Power ISA decode for Fixed-Point Facility instructions
	*
	* Copyright (c) 2021 Instituto de Pesquisas Eldorado (eldorado.org.br)
	*
	* This library is free software; you can redistribute it and/or
	* modify it under the terms of the GNU Lesser General Public
	* License as published by the Free Software Foundation; either
	* version 2.1 of the License, or (at your option) any later version.
	*
	* This library is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	* Lesser General Public License for more details.
	*
	* You should have received a copy of the GNU Lesser General Public
	* License along with this library; if not, see <http://www.gnu.org/licenses/>.
	*/

	/*
	* Incorporate CIA into the constant when R=1.
	* Validate that when R=1, RA=0.
	*/
	static bool resolve_PLS_D(DisasContext ctx, arg_D d, arg_PLS_D *a)
	{
	d->rt = a->rt;
	d->ra = a->ra;
	d->si = a->si;
	if (a->r) {
	if (unlikely(a->ra != 0)) {
	gen_invalid(ctx);
	return false;
	}
	d->si += ctx->cia;
	}
	return true;
	}

	/*
	* Fixed-Point Load/Store Instructions
	*/

	static bool do_ldst(DisasContext *ctx, int rt, int ra, TCGv displ, bool update,
	bool store, MemOp mop)
	{
	TCGv ea;

	if (update && (ra == 0 \|\| (!store && ra == rt))) {
	gen_invalid(ctx);
	return true;
	}
	gen_set_access_type(ctx, ACCESS_INT);

	ea = tcg_temp_new();
	if (ra) {
	tcg_gen_add_tl(ea, cpu_gpr[ra], displ);
	} else {
	tcg_gen_mov_tl(ea, displ);
	}
	if (NARROW_MODE(ctx)) {
	tcg_gen_ext32u_tl(ea, ea);
	}
	mop ^= ctx->default_tcg_memop_mask;
	if (store) {
	tcg_gen_qemu_st_tl(cpu_gpr[rt], ea, ctx->mem_idx, mop);
	} else {
	tcg_gen_qemu_ld_tl(cpu_gpr[rt], ea, ctx->mem_idx, mop);
	}
	if (update) {
	tcg_gen_mov_tl(cpu_gpr[ra], ea);
	}
	tcg_temp_free(ea);

	return true;
	}

	static bool do_ldst_D(DisasContext ctx, arg_D a, bool update, bool store,
	MemOp mop)
	{
	return do_ldst(ctx, a->rt, a->ra, tcg_constant_tl(a->si), update, store, mop);
	}

	static bool do_ldst_PLS_D(DisasContext ctx, arg_PLS_D a, bool update,
	bool store, MemOp mop)
	{
	arg_D d;
	if (!resolve_PLS_D(ctx, &d, a)) {
	return true;
	}
	return do_ldst_D(ctx, &d, update, store, mop);
	}

	static bool do_ldst_X(DisasContext ctx, arg_X a, bool update,
	bool store, MemOp mop)
	{
	return do_ldst(ctx, a->rt, a->ra, cpu_gpr[a->rb], update, store, mop);
	}

	/* Load Byte and Zero */
	TRANS(LBZ, do_ldst_D, false, false, MO_UB)
	TRANS(LBZX, do_ldst_X, false, false, MO_UB)
	TRANS(LBZU, do_ldst_D, true, false, MO_UB)
	TRANS(LBZUX, do_ldst_X, true, false, MO_UB)
	TRANS(PLBZ, do_ldst_PLS_D, false, false, MO_UB)

	/* Load Halfword and Zero */
	TRANS(LHZ, do_ldst_D, false, false, MO_UW)
	TRANS(LHZX, do_ldst_X, false, false, MO_UW)
	TRANS(LHZU, do_ldst_D, true, false, MO_UW)
	TRANS(LHZUX, do_ldst_X, true, false, MO_UW)
	TRANS(PLHZ, do_ldst_PLS_D, false, false, MO_UW)

	/* Load Halfword Algebraic */
	TRANS(LHA, do_ldst_D, false, false, MO_SW)
	TRANS(LHAX, do_ldst_X, false, false, MO_SW)
	TRANS(LHAU, do_ldst_D, true, false, MO_SW)
	TRANS(LHAXU, do_ldst_X, true, false, MO_SW)
	TRANS(PLHA, do_ldst_PLS_D, false, false, MO_SW)

	/* Load Word and Zero */
	TRANS(LWZ, do_ldst_D, false, false, MO_UL)
	TRANS(LWZX, do_ldst_X, false, false, MO_UL)
	TRANS(LWZU, do_ldst_D, true, false, MO_UL)
	TRANS(LWZUX, do_ldst_X, true, false, MO_UL)
	TRANS(PLWZ, do_ldst_PLS_D, false, false, MO_UL)

	/* Load Word Algebraic */
	TRANS64(LWA, do_ldst_D, false, false, MO_SL)
	TRANS64(LWAX, do_ldst_X, false, false, MO_SL)
	TRANS64(LWAUX, do_ldst_X, true, false, MO_SL)
	TRANS64(PLWA, do_ldst_PLS_D, false, false, MO_SL)

	/* Load Doubleword */
	TRANS64(LD, do_ldst_D, false, false, MO_Q)
	TRANS64(LDX, do_ldst_X, false, false, MO_Q)
	TRANS64(LDU, do_ldst_D, true, false, MO_Q)
	TRANS64(LDUX, do_ldst_X, true, false, MO_Q)
	TRANS64(PLD, do_ldst_PLS_D, false, false, MO_Q)

	/* Store Byte */
	TRANS(STB, do_ldst_D, false, true, MO_UB)
	TRANS(STBX, do_ldst_X, false, true, MO_UB)
	TRANS(STBU, do_ldst_D, true, true, MO_UB)
	TRANS(STBUX, do_ldst_X, true, true, MO_UB)
	TRANS(PSTB, do_ldst_PLS_D, false, true, MO_UB)

	/* Store Halfword */
	TRANS(STH, do_ldst_D, false, true, MO_UW)
	TRANS(STHX, do_ldst_X, false, true, MO_UW)
	TRANS(STHU, do_ldst_D, true, true, MO_UW)
	TRANS(STHUX, do_ldst_X, true, true, MO_UW)
	TRANS(PSTH, do_ldst_PLS_D, false, true, MO_UW)

	/* Store Word */
	TRANS(STW, do_ldst_D, false, true, MO_UL)
	TRANS(STWX, do_ldst_X, false, true, MO_UL)
	TRANS(STWU, do_ldst_D, true, true, MO_UL)
	TRANS(STWUX, do_ldst_X, true, true, MO_UL)
	TRANS(PSTW, do_ldst_PLS_D, false, true, MO_UL)

	/* Store Doubleword */
	TRANS64(STD, do_ldst_D, false, true, MO_Q)
	TRANS64(STDX, do_ldst_X, false, true, MO_Q)
	TRANS64(STDU, do_ldst_D, true, true, MO_Q)
	TRANS64(STDUX, do_ldst_X, true, true, MO_Q)
	TRANS64(PSTD, do_ldst_PLS_D, false, true, MO_Q)

	/*
	* Fixed-Point Compare Instructions
	*/

	static bool do_cmp_X(DisasContext ctx, arg_X_bfl a, bool s)
	{
	if ((ctx->insns_flags & PPC_64B) == 0) {
	/*
	* For 32-bit implementations, The Programming Environments Manual says
	* that "the L field must be cleared, otherwise the instruction form is
	* invalid." It seems, however, that most 32-bit CPUs ignore invalid
	* forms (e.g., section "Instruction Formats" of the 405 and 440
	* manuals, "Integer Compare Instructions" of the 601 manual), with the
	* notable exception of the e500 and e500mc, where L=1 was reported to
	* cause an exception.
	*/
	if (a->l) {
	if ((ctx->insns_flags2 & PPC2_BOOKE206)) {
	/*
	* For 32-bit Book E v2.06 implementations (i.e. e500/e500mc),
	* generate an illegal instruction exception.
	*/
	return false;
	} else {
	qemu_log_mask(LOG_GUEST_ERROR,
	"Invalid form of CMP%s at 0x" TARGET_FMT_lx ", L = 1\n",
	s ? "" : "L", ctx->cia);
	}
	}
	gen_op_cmp32(cpu_gpr[a->ra], cpu_gpr[a->rb], s, a->bf);
	return true;
	}

	/* For 64-bit implementations, deal with bit L accordingly. */
	if (a->l) {
	gen_op_cmp(cpu_gpr[a->ra], cpu_gpr[a->rb], s, a->bf);
	} else {
	gen_op_cmp32(cpu_gpr[a->ra], cpu_gpr[a->rb], s, a->bf);
	}
	return true;
	}

	static bool do_cmp_D(DisasContext ctx, arg_D_bf a, bool s)
	{
	if ((ctx->insns_flags & PPC_64B) == 0) {
	/*
	* For 32-bit implementations, The Programming Environments Manual says
	* that "the L field must be cleared, otherwise the instruction form is
	* invalid." It seems, however, that most 32-bit CPUs ignore invalid
	* forms (e.g., section "Instruction Formats" of the 405 and 440
	* manuals, "Integer Compare Instructions" of the 601 manual), with the
	* notable exception of the e500 and e500mc, where L=1 was reported to
	* cause an exception.
	*/
	if (a->l) {
	if ((ctx->insns_flags2 & PPC2_BOOKE206)) {
	/*
	* For 32-bit Book E v2.06 implementations (i.e. e500/e500mc),
	* generate an illegal instruction exception.
	*/
	return false;
	} else {
	qemu_log_mask(LOG_GUEST_ERROR,
	"Invalid form of CMP%s at 0x" TARGET_FMT_lx ", L = 1\n",
	s ? "I" : "LI", ctx->cia);
	}
	}
	gen_op_cmp32(cpu_gpr[a->ra], tcg_constant_tl(a->imm), s, a->bf);
	return true;
	}

	/* For 64-bit implementations, deal with bit L accordingly. */
	if (a->l) {
	gen_op_cmp(cpu_gpr[a->ra], tcg_constant_tl(a->imm), s, a->bf);
	} else {
	gen_op_cmp32(cpu_gpr[a->ra], tcg_constant_tl(a->imm), s, a->bf);
	}
	return true;
	}

	TRANS(CMP, do_cmp_X, true);
	TRANS(CMPL, do_cmp_X, false);
	TRANS(CMPI, do_cmp_D, true);
	TRANS(CMPLI, do_cmp_D, false);

	/*
	* Fixed-Point Arithmetic Instructions
	*/

	static bool trans_ADDI(DisasContext ctx, arg_D a)
	{
	if (a->ra) {
	tcg_gen_addi_tl(cpu_gpr[a->rt], cpu_gpr[a->ra], a->si);
	} else {
	tcg_gen_movi_tl(cpu_gpr[a->rt], a->si);
	}
	return true;
	}

	static bool trans_PADDI(DisasContext ctx, arg_PLS_D a)
	{
	arg_D d;
	if (!resolve_PLS_D(ctx, &d, a)) {
	return true;
	}
	return trans_ADDI(ctx, &d);
	}

	static bool trans_ADDIS(DisasContext ctx, arg_D a)
	{
	a->si <<= 16;
	return trans_ADDI(ctx, a);
	}

	static bool trans_ADDPCIS(DisasContext ctx, arg_DX a)
	{
	REQUIRE_INSNS_FLAGS2(ctx, ISA300);
	tcg_gen_movi_tl(cpu_gpr[a->rt], ctx->base.pc_next + (a->d << 16));
	return true;
	}

	static bool trans_INVALID(DisasContext ctx, arg_INVALID a)
	{
	gen_invalid(ctx);
	return true;
	}

	static bool trans_PNOP(DisasContext ctx, arg_PNOP a)
	{
	return true;
	}

	static bool do_set_bool_cond(DisasContext ctx, arg_X_bi a, bool neg, bool rev)
	{
	REQUIRE_INSNS_FLAGS2(ctx, ISA310);
	uint32_t mask = 0x08 >> (a->bi & 0x03);
	TCGCond cond = rev ? TCG_COND_EQ : TCG_COND_NE;
	TCGv temp = tcg_temp_new();

	tcg_gen_extu_i32_tl(temp, cpu_crf[a->bi >> 2]);
	tcg_gen_andi_tl(temp, temp, mask);
	tcg_gen_setcondi_tl(cond, cpu_gpr[a->rt], temp, 0);
	if (neg) {
	tcg_gen_neg_tl(cpu_gpr[a->rt], cpu_gpr[a->rt]);
	}
	tcg_temp_free(temp);

	return true;
	}

	TRANS(SETBC, do_set_bool_cond, false, false)
	TRANS(SETBCR, do_set_bool_cond, false, true)
	TRANS(SETNBC, do_set_bool_cond, true, false)
	TRANS(SETNBCR, do_set_bool_cond, true, true)

	static bool trans_CFUGED(DisasContext ctx, arg_X a)
	{
	REQUIRE_64BIT(ctx);
	REQUIRE_INSNS_FLAGS2(ctx, ISA310);
	#if defined(TARGET_PPC64)
	gen_helper_cfuged(cpu_gpr[a->ra], cpu_gpr[a->rt], cpu_gpr[a->rb]);
	#else
	qemu_build_not_reached();
	#endif
	return true;
	}