2 * RISC-V emulation for qemu: main translation routines.
4 * Copyright (c) 2016-2017 Sagar Karandikar, sagark@eecs.berkeley.edu
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms and conditions of the GNU General Public License,
8 * version 2 or later, as published by the Free Software Foundation.
10 * This program is distributed in the hope it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 * You should have received a copy of the GNU General Public License along with
16 * this program. If not, see <http://www.gnu.org/licenses/>.
19 #include "qemu/osdep.h"
22 #include "tcg/tcg-op.h"
23 #include "disas/disas.h"
24 #include "exec/cpu_ldst.h"
25 #include "exec/exec-all.h"
26 #include "exec/helper-proto.h"
27 #include "exec/helper-gen.h"
29 #include "exec/translator.h"
31 #include "semihosting/semihost.h"
34 #include "internals.h"
36 /* global register indices */
37 static TCGv cpu_gpr
[32], cpu_gprh
[32], cpu_pc
, cpu_vl
, cpu_vstart
;
38 static TCGv_i64 cpu_fpr
[32]; /* assume F and D extensions */
41 /* globals for PM CSRs */
45 #include "exec/gen-icount.h"
48 * If an operation is being performed on less than TARGET_LONG_BITS,
49 * it may require the inputs to be sign- or zero-extended; which will
50 * depend on the exact operation being performed.
58 typedef struct DisasContext
{
59 DisasContextBase base
;
60 /* pc_succ_insn points to the instruction following base.pc_next */
61 target_ulong pc_succ_insn
;
62 target_ulong priv_ver
;
63 RISCVMXL misa_mxl_max
;
69 uint32_t mstatus_hs_fs
;
70 uint32_t mstatus_hs_vs
;
72 /* Remember the rounding mode encoded in the previous fp instruction,
73 which we have already installed into env->fp_status. Or -1 for
74 no previous fp instruction. Note that we exit the TB when writing
75 to any system register, which includes CSR_FRM, so we do not have
76 to reset this known value. */
81 const RISCVCPUConfig
*cfg_ptr
;
83 /* vector extension */
86 * Encode LMUL to lmul as follows:
107 /* Space for 3 operands plus 1 extra for address computation. */
109 /* Space for 4 operands(1 dest and <=3 src) for float point computation */
112 /* PointerMasking extension */
113 bool pm_mask_enabled
;
114 bool pm_base_enabled
;
115 /* Use icount trigger for native debug */
117 /* FRM is known to contain a valid value. */
119 /* TCG of the current insn_start */
123 static inline bool has_ext(DisasContext
*ctx
, uint32_t ext
)
125 return ctx
->misa_ext
& ext
;
128 static bool always_true_p(DisasContext
*ctx
__attribute__((__unused__
)))
133 #define MATERIALISE_EXT_PREDICATE(ext) \
134 static bool has_ ## ext ## _p(DisasContext *ctx) \
136 return ctx->cfg_ptr->ext_ ## ext ; \
139 MATERIALISE_EXT_PREDICATE(XVentanaCondOps
);
141 #ifdef TARGET_RISCV32
142 #define get_xl(ctx) MXL_RV32
143 #elif defined(CONFIG_USER_ONLY)
144 #define get_xl(ctx) MXL_RV64
146 #define get_xl(ctx) ((ctx)->xl)
149 /* The word size for this machine mode. */
150 static inline int __attribute__((unused
)) get_xlen(DisasContext
*ctx
)
152 return 16 << get_xl(ctx
);
155 /* The operation length, as opposed to the xlen. */
156 #ifdef TARGET_RISCV32
157 #define get_ol(ctx) MXL_RV32
159 #define get_ol(ctx) ((ctx)->ol)
162 static inline int get_olen(DisasContext
*ctx
)
164 return 16 << get_ol(ctx
);
167 /* The maximum register length */
168 #ifdef TARGET_RISCV32
169 #define get_xl_max(ctx) MXL_RV32
171 #define get_xl_max(ctx) ((ctx)->misa_mxl_max)
175 * RISC-V requires NaN-boxing of narrower width floating point values.
176 * This applies when a 32-bit value is assigned to a 64-bit FP register.
177 * For consistency and simplicity, we nanbox results even when the RVD
178 * extension is not present.
180 static void gen_nanbox_s(TCGv_i64 out
, TCGv_i64 in
)
182 tcg_gen_ori_i64(out
, in
, MAKE_64BIT_MASK(32, 32));
185 static void gen_nanbox_h(TCGv_i64 out
, TCGv_i64 in
)
187 tcg_gen_ori_i64(out
, in
, MAKE_64BIT_MASK(16, 48));
191 * A narrow n-bit operation, where n < FLEN, checks that input operands
192 * are correctly Nan-boxed, i.e., all upper FLEN - n bits are 1.
193 * If so, the least-significant bits of the input are used, otherwise the
194 * input value is treated as an n-bit canonical NaN (v2.2 section 9.2).
196 * Here, the result is always nan-boxed, even the canonical nan.
198 static void gen_check_nanbox_h(TCGv_i64 out
, TCGv_i64 in
)
200 TCGv_i64 t_max
= tcg_const_i64(0xffffffffffff0000ull
);
201 TCGv_i64 t_nan
= tcg_const_i64(0xffffffffffff7e00ull
);
203 tcg_gen_movcond_i64(TCG_COND_GEU
, out
, in
, t_max
, in
, t_nan
);
204 tcg_temp_free_i64(t_max
);
205 tcg_temp_free_i64(t_nan
);
208 static void gen_check_nanbox_s(TCGv_i64 out
, TCGv_i64 in
)
210 TCGv_i64 t_max
= tcg_constant_i64(0xffffffff00000000ull
);
211 TCGv_i64 t_nan
= tcg_constant_i64(0xffffffff7fc00000ull
);
213 tcg_gen_movcond_i64(TCG_COND_GEU
, out
, in
, t_max
, in
, t_nan
);
216 static void decode_save_opc(DisasContext
*ctx
)
218 assert(ctx
->insn_start
!= NULL
);
219 tcg_set_insn_start_param(ctx
->insn_start
, 1, ctx
->opcode
);
220 ctx
->insn_start
= NULL
;
223 static void gen_set_pc_imm(DisasContext
*ctx
, target_ulong dest
)
225 if (get_xl(ctx
) == MXL_RV32
) {
226 dest
= (int32_t)dest
;
228 tcg_gen_movi_tl(cpu_pc
, dest
);
231 static void gen_set_pc(DisasContext
*ctx
, TCGv dest
)
233 if (get_xl(ctx
) == MXL_RV32
) {
234 tcg_gen_ext32s_tl(cpu_pc
, dest
);
236 tcg_gen_mov_tl(cpu_pc
, dest
);
240 static void generate_exception(DisasContext
*ctx
, int excp
)
242 gen_set_pc_imm(ctx
, ctx
->base
.pc_next
);
243 gen_helper_raise_exception(cpu_env
, tcg_constant_i32(excp
));
244 ctx
->base
.is_jmp
= DISAS_NORETURN
;
247 static void gen_exception_illegal(DisasContext
*ctx
)
249 tcg_gen_st_i32(tcg_constant_i32(ctx
->opcode
), cpu_env
,
250 offsetof(CPURISCVState
, bins
));
251 if (ctx
->virt_inst_excp
) {
252 generate_exception(ctx
, RISCV_EXCP_VIRT_INSTRUCTION_FAULT
);
254 generate_exception(ctx
, RISCV_EXCP_ILLEGAL_INST
);
258 static void gen_exception_inst_addr_mis(DisasContext
*ctx
)
260 tcg_gen_st_tl(cpu_pc
, cpu_env
, offsetof(CPURISCVState
, badaddr
));
261 generate_exception(ctx
, RISCV_EXCP_INST_ADDR_MIS
);
264 static void lookup_and_goto_ptr(DisasContext
*ctx
)
266 #ifndef CONFIG_USER_ONLY
268 gen_helper_itrigger_match(cpu_env
);
271 tcg_gen_lookup_and_goto_ptr();
274 static void exit_tb(DisasContext
*ctx
)
276 #ifndef CONFIG_USER_ONLY
278 gen_helper_itrigger_match(cpu_env
);
281 tcg_gen_exit_tb(NULL
, 0);
284 static void gen_goto_tb(DisasContext
*ctx
, int n
, target_ulong dest
)
287 * Under itrigger, instruction executes one by one like singlestep,
288 * direct block chain benefits will be small.
290 if (translator_use_goto_tb(&ctx
->base
, dest
) && !ctx
->itrigger
) {
292 gen_set_pc_imm(ctx
, dest
);
293 tcg_gen_exit_tb(ctx
->base
.tb
, n
);
295 gen_set_pc_imm(ctx
, dest
);
296 lookup_and_goto_ptr(ctx
);
301 * Wrappers for getting reg values.
303 * The $zero register does not have cpu_gpr[0] allocated -- we supply the
304 * constant zero as a source, and an uninitialized sink as destination.
306 * Further, we may provide an extension for word operations.
308 static TCGv
temp_new(DisasContext
*ctx
)
310 assert(ctx
->ntemp
< ARRAY_SIZE(ctx
->temp
));
311 return ctx
->temp
[ctx
->ntemp
++] = tcg_temp_new();
314 static TCGv
get_gpr(DisasContext
*ctx
, int reg_num
, DisasExtend ext
)
322 switch (get_ol(ctx
)) {
329 tcg_gen_ext32s_tl(t
, cpu_gpr
[reg_num
]);
333 tcg_gen_ext32u_tl(t
, cpu_gpr
[reg_num
]);
336 g_assert_not_reached();
343 g_assert_not_reached();
345 return cpu_gpr
[reg_num
];
348 static TCGv
get_gprh(DisasContext
*ctx
, int reg_num
)
350 assert(get_xl(ctx
) == MXL_RV128
);
354 return cpu_gprh
[reg_num
];
357 static TCGv
dest_gpr(DisasContext
*ctx
, int reg_num
)
359 if (reg_num
== 0 || get_olen(ctx
) < TARGET_LONG_BITS
) {
360 return temp_new(ctx
);
362 return cpu_gpr
[reg_num
];
365 static TCGv
dest_gprh(DisasContext
*ctx
, int reg_num
)
368 return temp_new(ctx
);
370 return cpu_gprh
[reg_num
];
373 static void gen_set_gpr(DisasContext
*ctx
, int reg_num
, TCGv t
)
376 switch (get_ol(ctx
)) {
378 tcg_gen_ext32s_tl(cpu_gpr
[reg_num
], t
);
382 tcg_gen_mov_tl(cpu_gpr
[reg_num
], t
);
385 g_assert_not_reached();
388 if (get_xl_max(ctx
) == MXL_RV128
) {
389 tcg_gen_sari_tl(cpu_gprh
[reg_num
], cpu_gpr
[reg_num
], 63);
394 static void gen_set_gpri(DisasContext
*ctx
, int reg_num
, target_long imm
)
397 switch (get_ol(ctx
)) {
399 tcg_gen_movi_tl(cpu_gpr
[reg_num
], (int32_t)imm
);
403 tcg_gen_movi_tl(cpu_gpr
[reg_num
], imm
);
406 g_assert_not_reached();
409 if (get_xl_max(ctx
) == MXL_RV128
) {
410 tcg_gen_movi_tl(cpu_gprh
[reg_num
], -(imm
< 0));
415 static void gen_set_gpr128(DisasContext
*ctx
, int reg_num
, TCGv rl
, TCGv rh
)
417 assert(get_ol(ctx
) == MXL_RV128
);
419 tcg_gen_mov_tl(cpu_gpr
[reg_num
], rl
);
420 tcg_gen_mov_tl(cpu_gprh
[reg_num
], rh
);
424 static TCGv_i64
ftemp_new(DisasContext
*ctx
)
426 assert(ctx
->nftemp
< ARRAY_SIZE(ctx
->ftemp
));
427 return ctx
->ftemp
[ctx
->nftemp
++] = tcg_temp_new_i64();
430 static TCGv_i64
get_fpr_hs(DisasContext
*ctx
, int reg_num
)
432 if (!ctx
->cfg_ptr
->ext_zfinx
) {
433 return cpu_fpr
[reg_num
];
437 return tcg_constant_i64(0);
439 switch (get_xl(ctx
)) {
441 #ifdef TARGET_RISCV32
443 TCGv_i64 t
= ftemp_new(ctx
);
444 tcg_gen_ext_i32_i64(t
, cpu_gpr
[reg_num
]);
450 return cpu_gpr
[reg_num
];
453 g_assert_not_reached();
457 static TCGv_i64
get_fpr_d(DisasContext
*ctx
, int reg_num
)
459 if (!ctx
->cfg_ptr
->ext_zfinx
) {
460 return cpu_fpr
[reg_num
];
464 return tcg_constant_i64(0);
466 switch (get_xl(ctx
)) {
469 TCGv_i64 t
= ftemp_new(ctx
);
470 tcg_gen_concat_tl_i64(t
, cpu_gpr
[reg_num
], cpu_gpr
[reg_num
+ 1]);
473 #ifdef TARGET_RISCV64
475 return cpu_gpr
[reg_num
];
478 g_assert_not_reached();
482 static TCGv_i64
dest_fpr(DisasContext
*ctx
, int reg_num
)
484 if (!ctx
->cfg_ptr
->ext_zfinx
) {
485 return cpu_fpr
[reg_num
];
489 return ftemp_new(ctx
);
492 switch (get_xl(ctx
)) {
494 return ftemp_new(ctx
);
495 #ifdef TARGET_RISCV64
497 return cpu_gpr
[reg_num
];
500 g_assert_not_reached();
504 /* assume t is nanboxing (for normal) or sign-extended (for zfinx) */
505 static void gen_set_fpr_hs(DisasContext
*ctx
, int reg_num
, TCGv_i64 t
)
507 if (!ctx
->cfg_ptr
->ext_zfinx
) {
508 tcg_gen_mov_i64(cpu_fpr
[reg_num
], t
);
512 switch (get_xl(ctx
)) {
514 #ifdef TARGET_RISCV32
515 tcg_gen_extrl_i64_i32(cpu_gpr
[reg_num
], t
);
520 tcg_gen_mov_i64(cpu_gpr
[reg_num
], t
);
524 g_assert_not_reached();
529 static void gen_set_fpr_d(DisasContext
*ctx
, int reg_num
, TCGv_i64 t
)
531 if (!ctx
->cfg_ptr
->ext_zfinx
) {
532 tcg_gen_mov_i64(cpu_fpr
[reg_num
], t
);
537 switch (get_xl(ctx
)) {
539 #ifdef TARGET_RISCV32
540 tcg_gen_extr_i64_i32(cpu_gpr
[reg_num
], cpu_gpr
[reg_num
+ 1], t
);
543 tcg_gen_ext32s_i64(cpu_gpr
[reg_num
], t
);
544 tcg_gen_sari_i64(cpu_gpr
[reg_num
+ 1], t
, 32);
547 tcg_gen_mov_i64(cpu_gpr
[reg_num
], t
);
551 g_assert_not_reached();
556 static void gen_jal(DisasContext
*ctx
, int rd
, target_ulong imm
)
558 target_ulong next_pc
;
560 /* check misaligned: */
561 next_pc
= ctx
->base
.pc_next
+ imm
;
562 if (!has_ext(ctx
, RVC
)) {
563 if ((next_pc
& 0x3) != 0) {
564 gen_exception_inst_addr_mis(ctx
);
569 gen_set_gpri(ctx
, rd
, ctx
->pc_succ_insn
);
570 gen_goto_tb(ctx
, 0, ctx
->base
.pc_next
+ imm
); /* must use this for safety */
571 ctx
->base
.is_jmp
= DISAS_NORETURN
;
574 /* Compute a canonical address from a register plus offset. */
575 static TCGv
get_address(DisasContext
*ctx
, int rs1
, int imm
)
577 TCGv addr
= temp_new(ctx
);
578 TCGv src1
= get_gpr(ctx
, rs1
, EXT_NONE
);
580 tcg_gen_addi_tl(addr
, src1
, imm
);
581 if (ctx
->pm_mask_enabled
) {
582 tcg_gen_andc_tl(addr
, addr
, pm_mask
);
583 } else if (get_xl(ctx
) == MXL_RV32
) {
584 tcg_gen_ext32u_tl(addr
, addr
);
586 if (ctx
->pm_base_enabled
) {
587 tcg_gen_or_tl(addr
, addr
, pm_base
);
592 #ifndef CONFIG_USER_ONLY
593 /* The states of mstatus_fs are:
594 * 0 = disabled, 1 = initial, 2 = clean, 3 = dirty
595 * We will have already diagnosed disabled state,
596 * and need to turn initial/clean into dirty.
598 static void mark_fs_dirty(DisasContext
*ctx
)
602 if (!has_ext(ctx
, RVF
)) {
606 if (ctx
->mstatus_fs
!= MSTATUS_FS
) {
607 /* Remember the state change for the rest of the TB. */
608 ctx
->mstatus_fs
= MSTATUS_FS
;
610 tmp
= tcg_temp_new();
611 tcg_gen_ld_tl(tmp
, cpu_env
, offsetof(CPURISCVState
, mstatus
));
612 tcg_gen_ori_tl(tmp
, tmp
, MSTATUS_FS
);
613 tcg_gen_st_tl(tmp
, cpu_env
, offsetof(CPURISCVState
, mstatus
));
617 if (ctx
->virt_enabled
&& ctx
->mstatus_hs_fs
!= MSTATUS_FS
) {
618 /* Remember the stage change for the rest of the TB. */
619 ctx
->mstatus_hs_fs
= MSTATUS_FS
;
621 tmp
= tcg_temp_new();
622 tcg_gen_ld_tl(tmp
, cpu_env
, offsetof(CPURISCVState
, mstatus_hs
));
623 tcg_gen_ori_tl(tmp
, tmp
, MSTATUS_FS
);
624 tcg_gen_st_tl(tmp
, cpu_env
, offsetof(CPURISCVState
, mstatus_hs
));
629 static inline void mark_fs_dirty(DisasContext
*ctx
) { }
632 #ifndef CONFIG_USER_ONLY
633 /* The states of mstatus_vs are:
634 * 0 = disabled, 1 = initial, 2 = clean, 3 = dirty
635 * We will have already diagnosed disabled state,
636 * and need to turn initial/clean into dirty.
638 static void mark_vs_dirty(DisasContext
*ctx
)
642 if (ctx
->mstatus_vs
!= MSTATUS_VS
) {
643 /* Remember the state change for the rest of the TB. */
644 ctx
->mstatus_vs
= MSTATUS_VS
;
646 tmp
= tcg_temp_new();
647 tcg_gen_ld_tl(tmp
, cpu_env
, offsetof(CPURISCVState
, mstatus
));
648 tcg_gen_ori_tl(tmp
, tmp
, MSTATUS_VS
);
649 tcg_gen_st_tl(tmp
, cpu_env
, offsetof(CPURISCVState
, mstatus
));
653 if (ctx
->virt_enabled
&& ctx
->mstatus_hs_vs
!= MSTATUS_VS
) {
654 /* Remember the stage change for the rest of the TB. */
655 ctx
->mstatus_hs_vs
= MSTATUS_VS
;
657 tmp
= tcg_temp_new();
658 tcg_gen_ld_tl(tmp
, cpu_env
, offsetof(CPURISCVState
, mstatus_hs
));
659 tcg_gen_ori_tl(tmp
, tmp
, MSTATUS_VS
);
660 tcg_gen_st_tl(tmp
, cpu_env
, offsetof(CPURISCVState
, mstatus_hs
));
665 static inline void mark_vs_dirty(DisasContext
*ctx
) { }
668 static void gen_set_rm(DisasContext
*ctx
, int rm
)
670 if (ctx
->frm
== rm
) {
675 if (rm
== RISCV_FRM_DYN
) {
676 /* The helper will return only if frm valid. */
677 ctx
->frm_valid
= true;
680 /* The helper may raise ILLEGAL_INSN -- record binv for unwind. */
681 decode_save_opc(ctx
);
682 gen_helper_set_rounding_mode(cpu_env
, tcg_constant_i32(rm
));
685 static void gen_set_rm_chkfrm(DisasContext
*ctx
, int rm
)
687 if (ctx
->frm
== rm
&& ctx
->frm_valid
) {
691 ctx
->frm_valid
= true;
693 /* The helper may raise ILLEGAL_INSN -- record binv for unwind. */
694 decode_save_opc(ctx
);
695 gen_helper_set_rounding_mode_chkfrm(cpu_env
, tcg_constant_i32(rm
));
698 static int ex_plus_1(DisasContext
*ctx
, int nf
)
703 #define EX_SH(amount) \
704 static int ex_shift_##amount(DisasContext *ctx, int imm) \
706 return imm << amount; \
714 #define REQUIRE_EXT(ctx, ext) do { \
715 if (!has_ext(ctx, ext)) { \
720 #define REQUIRE_32BIT(ctx) do { \
721 if (get_xl(ctx) != MXL_RV32) { \
726 #define REQUIRE_64BIT(ctx) do { \
727 if (get_xl(ctx) != MXL_RV64) { \
732 #define REQUIRE_128BIT(ctx) do { \
733 if (get_xl(ctx) != MXL_RV128) { \
738 #define REQUIRE_64_OR_128BIT(ctx) do { \
739 if (get_xl(ctx) == MXL_RV32) { \
744 #define REQUIRE_EITHER_EXT(ctx, A, B) do { \
745 if (!ctx->cfg_ptr->ext_##A && \
746 !ctx->cfg_ptr->ext_##B) { \
751 static int ex_rvc_register(DisasContext
*ctx
, int reg
)
756 static int ex_rvc_shiftli(DisasContext
*ctx
, int imm
)
758 /* For RV128 a shamt of 0 means a shift by 64. */
759 if (get_ol(ctx
) == MXL_RV128
) {
760 imm
= imm
? imm
: 64;
765 static int ex_rvc_shiftri(DisasContext
*ctx
, int imm
)
768 * For RV128 a shamt of 0 means a shift by 64, furthermore, for right
769 * shifts, the shamt is sign-extended.
771 if (get_ol(ctx
) == MXL_RV128
) {
772 imm
= imm
| (imm
& 32) << 1;
773 imm
= imm
? imm
: 64;
778 /* Include the auto-generated decoder for 32 bit insn */
779 #include "decode-insn32.c.inc"
781 static bool gen_logic_imm_fn(DisasContext
*ctx
, arg_i
*a
,
782 void (*func
)(TCGv
, TCGv
, target_long
))
784 TCGv dest
= dest_gpr(ctx
, a
->rd
);
785 TCGv src1
= get_gpr(ctx
, a
->rs1
, EXT_NONE
);
787 func(dest
, src1
, a
->imm
);
789 if (get_xl(ctx
) == MXL_RV128
) {
790 TCGv src1h
= get_gprh(ctx
, a
->rs1
);
791 TCGv desth
= dest_gprh(ctx
, a
->rd
);
793 func(desth
, src1h
, -(a
->imm
< 0));
794 gen_set_gpr128(ctx
, a
->rd
, dest
, desth
);
796 gen_set_gpr(ctx
, a
->rd
, dest
);
802 static bool gen_logic(DisasContext
*ctx
, arg_r
*a
,
803 void (*func
)(TCGv
, TCGv
, TCGv
))
805 TCGv dest
= dest_gpr(ctx
, a
->rd
);
806 TCGv src1
= get_gpr(ctx
, a
->rs1
, EXT_NONE
);
807 TCGv src2
= get_gpr(ctx
, a
->rs2
, EXT_NONE
);
809 func(dest
, src1
, src2
);
811 if (get_xl(ctx
) == MXL_RV128
) {
812 TCGv src1h
= get_gprh(ctx
, a
->rs1
);
813 TCGv src2h
= get_gprh(ctx
, a
->rs2
);
814 TCGv desth
= dest_gprh(ctx
, a
->rd
);
816 func(desth
, src1h
, src2h
);
817 gen_set_gpr128(ctx
, a
->rd
, dest
, desth
);
819 gen_set_gpr(ctx
, a
->rd
, dest
);
825 static bool gen_arith_imm_fn(DisasContext
*ctx
, arg_i
*a
, DisasExtend ext
,
826 void (*func
)(TCGv
, TCGv
, target_long
),
827 void (*f128
)(TCGv
, TCGv
, TCGv
, TCGv
, target_long
))
829 TCGv dest
= dest_gpr(ctx
, a
->rd
);
830 TCGv src1
= get_gpr(ctx
, a
->rs1
, ext
);
832 if (get_ol(ctx
) < MXL_RV128
) {
833 func(dest
, src1
, a
->imm
);
834 gen_set_gpr(ctx
, a
->rd
, dest
);
840 TCGv src1h
= get_gprh(ctx
, a
->rs1
);
841 TCGv desth
= dest_gprh(ctx
, a
->rd
);
843 f128(dest
, desth
, src1
, src1h
, a
->imm
);
844 gen_set_gpr128(ctx
, a
->rd
, dest
, desth
);
849 static bool gen_arith_imm_tl(DisasContext
*ctx
, arg_i
*a
, DisasExtend ext
,
850 void (*func
)(TCGv
, TCGv
, TCGv
),
851 void (*f128
)(TCGv
, TCGv
, TCGv
, TCGv
, TCGv
, TCGv
))
853 TCGv dest
= dest_gpr(ctx
, a
->rd
);
854 TCGv src1
= get_gpr(ctx
, a
->rs1
, ext
);
855 TCGv src2
= tcg_constant_tl(a
->imm
);
857 if (get_ol(ctx
) < MXL_RV128
) {
858 func(dest
, src1
, src2
);
859 gen_set_gpr(ctx
, a
->rd
, dest
);
865 TCGv src1h
= get_gprh(ctx
, a
->rs1
);
866 TCGv src2h
= tcg_constant_tl(-(a
->imm
< 0));
867 TCGv desth
= dest_gprh(ctx
, a
->rd
);
869 f128(dest
, desth
, src1
, src1h
, src2
, src2h
);
870 gen_set_gpr128(ctx
, a
->rd
, dest
, desth
);
875 static bool gen_arith(DisasContext
*ctx
, arg_r
*a
, DisasExtend ext
,
876 void (*func
)(TCGv
, TCGv
, TCGv
),
877 void (*f128
)(TCGv
, TCGv
, TCGv
, TCGv
, TCGv
, TCGv
))
879 TCGv dest
= dest_gpr(ctx
, a
->rd
);
880 TCGv src1
= get_gpr(ctx
, a
->rs1
, ext
);
881 TCGv src2
= get_gpr(ctx
, a
->rs2
, ext
);
883 if (get_ol(ctx
) < MXL_RV128
) {
884 func(dest
, src1
, src2
);
885 gen_set_gpr(ctx
, a
->rd
, dest
);
891 TCGv src1h
= get_gprh(ctx
, a
->rs1
);
892 TCGv src2h
= get_gprh(ctx
, a
->rs2
);
893 TCGv desth
= dest_gprh(ctx
, a
->rd
);
895 f128(dest
, desth
, src1
, src1h
, src2
, src2h
);
896 gen_set_gpr128(ctx
, a
->rd
, dest
, desth
);
901 static bool gen_arith_per_ol(DisasContext
*ctx
, arg_r
*a
, DisasExtend ext
,
902 void (*f_tl
)(TCGv
, TCGv
, TCGv
),
903 void (*f_32
)(TCGv
, TCGv
, TCGv
),
904 void (*f_128
)(TCGv
, TCGv
, TCGv
, TCGv
, TCGv
, TCGv
))
906 int olen
= get_olen(ctx
);
908 if (olen
!= TARGET_LONG_BITS
) {
911 } else if (olen
!= 128) {
912 g_assert_not_reached();
915 return gen_arith(ctx
, a
, ext
, f_tl
, f_128
);
918 static bool gen_shift_imm_fn(DisasContext
*ctx
, arg_shift
*a
, DisasExtend ext
,
919 void (*func
)(TCGv
, TCGv
, target_long
),
920 void (*f128
)(TCGv
, TCGv
, TCGv
, TCGv
, target_long
))
923 int max_len
= get_olen(ctx
);
925 if (a
->shamt
>= max_len
) {
929 dest
= dest_gpr(ctx
, a
->rd
);
930 src1
= get_gpr(ctx
, a
->rs1
, ext
);
933 func(dest
, src1
, a
->shamt
);
934 gen_set_gpr(ctx
, a
->rd
, dest
);
936 TCGv src1h
= get_gprh(ctx
, a
->rs1
);
937 TCGv desth
= dest_gprh(ctx
, a
->rd
);
942 f128(dest
, desth
, src1
, src1h
, a
->shamt
);
943 gen_set_gpr128(ctx
, a
->rd
, dest
, desth
);
948 static bool gen_shift_imm_fn_per_ol(DisasContext
*ctx
, arg_shift
*a
,
950 void (*f_tl
)(TCGv
, TCGv
, target_long
),
951 void (*f_32
)(TCGv
, TCGv
, target_long
),
952 void (*f_128
)(TCGv
, TCGv
, TCGv
, TCGv
,
955 int olen
= get_olen(ctx
);
956 if (olen
!= TARGET_LONG_BITS
) {
959 } else if (olen
!= 128) {
960 g_assert_not_reached();
963 return gen_shift_imm_fn(ctx
, a
, ext
, f_tl
, f_128
);
966 static bool gen_shift_imm_tl(DisasContext
*ctx
, arg_shift
*a
, DisasExtend ext
,
967 void (*func
)(TCGv
, TCGv
, TCGv
))
969 TCGv dest
, src1
, src2
;
970 int max_len
= get_olen(ctx
);
972 if (a
->shamt
>= max_len
) {
976 dest
= dest_gpr(ctx
, a
->rd
);
977 src1
= get_gpr(ctx
, a
->rs1
, ext
);
978 src2
= tcg_constant_tl(a
->shamt
);
980 func(dest
, src1
, src2
);
982 gen_set_gpr(ctx
, a
->rd
, dest
);
986 static bool gen_shift(DisasContext
*ctx
, arg_r
*a
, DisasExtend ext
,
987 void (*func
)(TCGv
, TCGv
, TCGv
),
988 void (*f128
)(TCGv
, TCGv
, TCGv
, TCGv
, TCGv
))
990 TCGv src2
= get_gpr(ctx
, a
->rs2
, EXT_NONE
);
991 TCGv ext2
= tcg_temp_new();
992 int max_len
= get_olen(ctx
);
994 tcg_gen_andi_tl(ext2
, src2
, max_len
- 1);
996 TCGv dest
= dest_gpr(ctx
, a
->rd
);
997 TCGv src1
= get_gpr(ctx
, a
->rs1
, ext
);
1000 func(dest
, src1
, ext2
);
1001 gen_set_gpr(ctx
, a
->rd
, dest
);
1003 TCGv src1h
= get_gprh(ctx
, a
->rs1
);
1004 TCGv desth
= dest_gprh(ctx
, a
->rd
);
1009 f128(dest
, desth
, src1
, src1h
, ext2
);
1010 gen_set_gpr128(ctx
, a
->rd
, dest
, desth
);
1012 tcg_temp_free(ext2
);
1016 static bool gen_shift_per_ol(DisasContext
*ctx
, arg_r
*a
, DisasExtend ext
,
1017 void (*f_tl
)(TCGv
, TCGv
, TCGv
),
1018 void (*f_32
)(TCGv
, TCGv
, TCGv
),
1019 void (*f_128
)(TCGv
, TCGv
, TCGv
, TCGv
, TCGv
))
1021 int olen
= get_olen(ctx
);
1022 if (olen
!= TARGET_LONG_BITS
) {
1025 } else if (olen
!= 128) {
1026 g_assert_not_reached();
1029 return gen_shift(ctx
, a
, ext
, f_tl
, f_128
);
1032 static bool gen_unary(DisasContext
*ctx
, arg_r2
*a
, DisasExtend ext
,
1033 void (*func
)(TCGv
, TCGv
))
1035 TCGv dest
= dest_gpr(ctx
, a
->rd
);
1036 TCGv src1
= get_gpr(ctx
, a
->rs1
, ext
);
1040 gen_set_gpr(ctx
, a
->rd
, dest
);
1044 static bool gen_unary_per_ol(DisasContext
*ctx
, arg_r2
*a
, DisasExtend ext
,
1045 void (*f_tl
)(TCGv
, TCGv
),
1046 void (*f_32
)(TCGv
, TCGv
))
1048 int olen
= get_olen(ctx
);
1050 if (olen
!= TARGET_LONG_BITS
) {
1054 g_assert_not_reached();
1057 return gen_unary(ctx
, a
, ext
, f_tl
);
1060 static uint32_t opcode_at(DisasContextBase
*dcbase
, target_ulong pc
)
1062 DisasContext
*ctx
= container_of(dcbase
, DisasContext
, base
);
1063 CPUState
*cpu
= ctx
->cs
;
1064 CPURISCVState
*env
= cpu
->env_ptr
;
1066 return cpu_ldl_code(env
, pc
);
1069 /* Include insn module translation function */
1070 #include "insn_trans/trans_rvi.c.inc"
1071 #include "insn_trans/trans_rvm.c.inc"
1072 #include "insn_trans/trans_rva.c.inc"
1073 #include "insn_trans/trans_rvf.c.inc"
1074 #include "insn_trans/trans_rvd.c.inc"
1075 #include "insn_trans/trans_rvh.c.inc"
1076 #include "insn_trans/trans_rvv.c.inc"
1077 #include "insn_trans/trans_rvb.c.inc"
1078 #include "insn_trans/trans_rvzawrs.c.inc"
1079 #include "insn_trans/trans_rvzfh.c.inc"
1080 #include "insn_trans/trans_rvk.c.inc"
1081 #include "insn_trans/trans_privileged.c.inc"
1082 #include "insn_trans/trans_svinval.c.inc"
1083 #include "insn_trans/trans_xventanacondops.c.inc"
1085 /* Include the auto-generated decoder for 16 bit insn */
1086 #include "decode-insn16.c.inc"
1087 /* Include decoders for factored-out extensions */
1088 #include "decode-XVentanaCondOps.c.inc"
1090 /* The specification allows for longer insns, but not supported by qemu. */
1091 #define MAX_INSN_LEN 4
1093 static inline int insn_len(uint16_t first_word
)
1095 return (first_word
& 3) == 3 ? 4 : 2;
1098 static void decode_opc(CPURISCVState
*env
, DisasContext
*ctx
, uint16_t opcode
)
1101 * A table with predicate (i.e., guard) functions and decoder functions
1102 * that are tested in-order until a decoder matches onto the opcode.
1104 static const struct {
1105 bool (*guard_func
)(DisasContext
*);
1106 bool (*decode_func
)(DisasContext
*, uint32_t);
1108 { always_true_p
, decode_insn32
},
1109 { has_XVentanaCondOps_p
, decode_XVentanaCodeOps
},
1112 ctx
->virt_inst_excp
= false;
1113 /* Check for compressed insn */
1114 if (insn_len(opcode
) == 2) {
1115 ctx
->opcode
= opcode
;
1116 ctx
->pc_succ_insn
= ctx
->base
.pc_next
+ 2;
1117 if (has_ext(ctx
, RVC
) && decode_insn16(ctx
, opcode
)) {
1121 uint32_t opcode32
= opcode
;
1122 opcode32
= deposit32(opcode32
, 16, 16,
1123 translator_lduw(env
, &ctx
->base
,
1124 ctx
->base
.pc_next
+ 2));
1125 ctx
->opcode
= opcode32
;
1126 ctx
->pc_succ_insn
= ctx
->base
.pc_next
+ 4;
1128 for (size_t i
= 0; i
< ARRAY_SIZE(decoders
); ++i
) {
1129 if (decoders
[i
].guard_func(ctx
) &&
1130 decoders
[i
].decode_func(ctx
, opcode32
)) {
1136 gen_exception_illegal(ctx
);
1139 static void riscv_tr_init_disas_context(DisasContextBase
*dcbase
, CPUState
*cs
)
1141 DisasContext
*ctx
= container_of(dcbase
, DisasContext
, base
);
1142 CPURISCVState
*env
= cs
->env_ptr
;
1143 RISCVCPU
*cpu
= RISCV_CPU(cs
);
1144 uint32_t tb_flags
= ctx
->base
.tb
->flags
;
1146 ctx
->pc_succ_insn
= ctx
->base
.pc_first
;
1147 ctx
->mem_idx
= FIELD_EX32(tb_flags
, TB_FLAGS
, MEM_IDX
);
1148 ctx
->mstatus_fs
= tb_flags
& TB_FLAGS_MSTATUS_FS
;
1149 ctx
->mstatus_vs
= tb_flags
& TB_FLAGS_MSTATUS_VS
;
1150 ctx
->priv_ver
= env
->priv_ver
;
1151 #if !defined(CONFIG_USER_ONLY)
1152 if (riscv_has_ext(env
, RVH
)) {
1153 ctx
->virt_enabled
= riscv_cpu_virt_enabled(env
);
1155 ctx
->virt_enabled
= false;
1158 ctx
->virt_enabled
= false;
1160 ctx
->misa_ext
= env
->misa_ext
;
1161 ctx
->frm
= -1; /* unknown rounding mode */
1162 ctx
->cfg_ptr
= &(cpu
->cfg
);
1163 ctx
->mstatus_hs_fs
= FIELD_EX32(tb_flags
, TB_FLAGS
, MSTATUS_HS_FS
);
1164 ctx
->mstatus_hs_vs
= FIELD_EX32(tb_flags
, TB_FLAGS
, MSTATUS_HS_VS
);
1165 ctx
->hlsx
= FIELD_EX32(tb_flags
, TB_FLAGS
, HLSX
);
1166 ctx
->vill
= FIELD_EX32(tb_flags
, TB_FLAGS
, VILL
);
1167 ctx
->sew
= FIELD_EX32(tb_flags
, TB_FLAGS
, SEW
);
1168 ctx
->lmul
= sextract32(FIELD_EX32(tb_flags
, TB_FLAGS
, LMUL
), 0, 3);
1169 ctx
->vta
= FIELD_EX32(tb_flags
, TB_FLAGS
, VTA
) && cpu
->cfg
.rvv_ta_all_1s
;
1170 ctx
->vma
= FIELD_EX32(tb_flags
, TB_FLAGS
, VMA
) && cpu
->cfg
.rvv_ma_all_1s
;
1171 ctx
->cfg_vta_all_1s
= cpu
->cfg
.rvv_ta_all_1s
;
1172 ctx
->vstart
= env
->vstart
;
1173 ctx
->vl_eq_vlmax
= FIELD_EX32(tb_flags
, TB_FLAGS
, VL_EQ_VLMAX
);
1174 ctx
->misa_mxl_max
= env
->misa_mxl_max
;
1175 ctx
->xl
= FIELD_EX32(tb_flags
, TB_FLAGS
, XL
);
1178 memset(ctx
->temp
, 0, sizeof(ctx
->temp
));
1180 memset(ctx
->ftemp
, 0, sizeof(ctx
->ftemp
));
1181 ctx
->pm_mask_enabled
= FIELD_EX32(tb_flags
, TB_FLAGS
, PM_MASK_ENABLED
);
1182 ctx
->pm_base_enabled
= FIELD_EX32(tb_flags
, TB_FLAGS
, PM_BASE_ENABLED
);
1183 ctx
->itrigger
= FIELD_EX32(tb_flags
, TB_FLAGS
, ITRIGGER
);
1184 ctx
->zero
= tcg_constant_tl(0);
1187 static void riscv_tr_tb_start(DisasContextBase
*db
, CPUState
*cpu
)
1191 static void riscv_tr_insn_start(DisasContextBase
*dcbase
, CPUState
*cpu
)
1193 DisasContext
*ctx
= container_of(dcbase
, DisasContext
, base
);
1195 tcg_gen_insn_start(ctx
->base
.pc_next
, 0);
1196 ctx
->insn_start
= tcg_last_op();
1199 static void riscv_tr_translate_insn(DisasContextBase
*dcbase
, CPUState
*cpu
)
1201 DisasContext
*ctx
= container_of(dcbase
, DisasContext
, base
);
1202 CPURISCVState
*env
= cpu
->env_ptr
;
1203 uint16_t opcode16
= translator_lduw(env
, &ctx
->base
, ctx
->base
.pc_next
);
1207 decode_opc(env
, ctx
, opcode16
);
1208 ctx
->base
.pc_next
= ctx
->pc_succ_insn
;
1210 for (i
= ctx
->ntemp
- 1; i
>= 0; --i
) {
1211 tcg_temp_free(ctx
->temp
[i
]);
1212 ctx
->temp
[i
] = NULL
;
1215 for (i
= ctx
->nftemp
- 1; i
>= 0; --i
) {
1216 tcg_temp_free_i64(ctx
->ftemp
[i
]);
1217 ctx
->ftemp
[i
] = NULL
;
1221 /* Only the first insn within a TB is allowed to cross a page boundary. */
1222 if (ctx
->base
.is_jmp
== DISAS_NEXT
) {
1223 if (ctx
->itrigger
|| !is_same_page(&ctx
->base
, ctx
->base
.pc_next
)) {
1224 ctx
->base
.is_jmp
= DISAS_TOO_MANY
;
1226 unsigned page_ofs
= ctx
->base
.pc_next
& ~TARGET_PAGE_MASK
;
1228 if (page_ofs
> TARGET_PAGE_SIZE
- MAX_INSN_LEN
) {
1229 uint16_t next_insn
= cpu_lduw_code(env
, ctx
->base
.pc_next
);
1230 int len
= insn_len(next_insn
);
1232 if (!is_same_page(&ctx
->base
, ctx
->base
.pc_next
+ len
)) {
1233 ctx
->base
.is_jmp
= DISAS_TOO_MANY
;
1240 static void riscv_tr_tb_stop(DisasContextBase
*dcbase
, CPUState
*cpu
)
1242 DisasContext
*ctx
= container_of(dcbase
, DisasContext
, base
);
1244 switch (ctx
->base
.is_jmp
) {
1245 case DISAS_TOO_MANY
:
1246 gen_goto_tb(ctx
, 0, ctx
->base
.pc_next
);
1248 case DISAS_NORETURN
:
1251 g_assert_not_reached();
1255 static void riscv_tr_disas_log(const DisasContextBase
*dcbase
,
1256 CPUState
*cpu
, FILE *logfile
)
1258 #ifndef CONFIG_USER_ONLY
1259 RISCVCPU
*rvcpu
= RISCV_CPU(cpu
);
1260 CPURISCVState
*env
= &rvcpu
->env
;
1263 fprintf(logfile
, "IN: %s\n", lookup_symbol(dcbase
->pc_first
));
1264 #ifndef CONFIG_USER_ONLY
1265 fprintf(logfile
, "Priv: "TARGET_FMT_ld
"; Virt: "TARGET_FMT_ld
"\n",
1266 env
->priv
, env
->virt
);
1268 target_disas(logfile
, cpu
, dcbase
->pc_first
, dcbase
->tb
->size
);
1271 static const TranslatorOps riscv_tr_ops
= {
1272 .init_disas_context
= riscv_tr_init_disas_context
,
1273 .tb_start
= riscv_tr_tb_start
,
1274 .insn_start
= riscv_tr_insn_start
,
1275 .translate_insn
= riscv_tr_translate_insn
,
1276 .tb_stop
= riscv_tr_tb_stop
,
1277 .disas_log
= riscv_tr_disas_log
,
1280 void gen_intermediate_code(CPUState
*cs
, TranslationBlock
*tb
, int max_insns
,
1281 target_ulong pc
, void *host_pc
)
1285 translator_loop(cs
, tb
, max_insns
, pc
, host_pc
, &riscv_tr_ops
, &ctx
.base
);
1288 void riscv_translate_init(void)
1293 * cpu_gpr[0] is a placeholder for the zero register. Do not use it.
1294 * Use the gen_set_gpr and get_gpr helper functions when accessing regs,
1295 * unless you specifically block reads/writes to reg 0.
1300 for (i
= 1; i
< 32; i
++) {
1301 cpu_gpr
[i
] = tcg_global_mem_new(cpu_env
,
1302 offsetof(CPURISCVState
, gpr
[i
]), riscv_int_regnames
[i
]);
1303 cpu_gprh
[i
] = tcg_global_mem_new(cpu_env
,
1304 offsetof(CPURISCVState
, gprh
[i
]), riscv_int_regnamesh
[i
]);
1307 for (i
= 0; i
< 32; i
++) {
1308 cpu_fpr
[i
] = tcg_global_mem_new_i64(cpu_env
,
1309 offsetof(CPURISCVState
, fpr
[i
]), riscv_fpr_regnames
[i
]);
1312 cpu_pc
= tcg_global_mem_new(cpu_env
, offsetof(CPURISCVState
, pc
), "pc");
1313 cpu_vl
= tcg_global_mem_new(cpu_env
, offsetof(CPURISCVState
, vl
), "vl");
1314 cpu_vstart
= tcg_global_mem_new(cpu_env
, offsetof(CPURISCVState
, vstart
),
1316 load_res
= tcg_global_mem_new(cpu_env
, offsetof(CPURISCVState
, load_res
),
1318 load_val
= tcg_global_mem_new(cpu_env
, offsetof(CPURISCVState
, load_val
),
1320 /* Assign PM CSRs to tcg globals */
1321 pm_mask
= tcg_global_mem_new(cpu_env
, offsetof(CPURISCVState
, cur_pmmask
),
1323 pm_base
= tcg_global_mem_new(cpu_env
, offsetof(CPURISCVState
, cur_pmbase
),