[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-riscv] [PULL 07/11] RISC-V: Add misa.MAFD checks to translate
|
From: |
Palmer Dabbelt |
|
Subject: |
[Qemu-riscv] [PULL 07/11] RISC-V: Add misa.MAFD checks to translate |
|
Date: |
Wed, 13 Feb 2019 07:44:46 -0800 |
From: Michael Clark <address@hidden>
Add misa checks for M, A, F and D extensions and if they are
not present generate illegal instructions. This improves
emulation accurary for harts with a limited set of extensions.
Signed-off-by: Michael Clark <address@hidden>
Signed-off-by: Alistair Francis <address@hidden>
Reviewed-by: Richard Henderson <address@hidden>
Signed-off-by: Palmer Dabbelt <address@hidden>
---
target/riscv/translate.c | 158 +++++++++++++++++++++++++++++++++++++++
1 file changed, 158 insertions(+)
diff --git a/target/riscv/translate.c b/target/riscv/translate.c
index bb80387088e2..b7176cbf98e1 100644
--- a/target/riscv/translate.c
+++ b/target/riscv/translate.c
@@ -291,24 +291,42 @@ static void gen_arith(DisasContext *ctx, uint32_t opc,
int rd, int rs1,
tcg_gen_and_tl(source1, source1, source2);
break;
CASE_OP_32_64(OPC_RISC_MUL):
+ if (!has_ext(ctx, RVM)) {
+ goto do_illegal;
+ }
tcg_gen_mul_tl(source1, source1, source2);
break;
case OPC_RISC_MULH:
+ if (!has_ext(ctx, RVM)) {
+ goto do_illegal;
+ }
tcg_gen_muls2_tl(source2, source1, source1, source2);
break;
case OPC_RISC_MULHSU:
+ if (!has_ext(ctx, RVM)) {
+ goto do_illegal;
+ }
gen_mulhsu(source1, source1, source2);
break;
case OPC_RISC_MULHU:
+ if (!has_ext(ctx, RVM)) {
+ goto do_illegal;
+ }
tcg_gen_mulu2_tl(source2, source1, source1, source2);
break;
#if defined(TARGET_RISCV64)
case OPC_RISC_DIVW:
+ if (!has_ext(ctx, RVM)) {
+ goto do_illegal;
+ }
tcg_gen_ext32s_tl(source1, source1);
tcg_gen_ext32s_tl(source2, source2);
/* fall through to DIV */
#endif
case OPC_RISC_DIV:
+ if (!has_ext(ctx, RVM)) {
+ goto do_illegal;
+ }
/* Handle by altering args to tcg_gen_div to produce req'd results:
* For overflow: want source1 in source1 and 1 in source2
* For div by zero: want -1 in source1 and 1 in source2 -> -1 result */
@@ -340,11 +358,17 @@ static void gen_arith(DisasContext *ctx, uint32_t opc,
int rd, int rs1,
break;
#if defined(TARGET_RISCV64)
case OPC_RISC_DIVUW:
+ if (!has_ext(ctx, RVM)) {
+ goto do_illegal;
+ }
tcg_gen_ext32u_tl(source1, source1);
tcg_gen_ext32u_tl(source2, source2);
/* fall through to DIVU */
#endif
case OPC_RISC_DIVU:
+ if (!has_ext(ctx, RVM)) {
+ goto do_illegal;
+ }
cond1 = tcg_temp_new();
zeroreg = tcg_const_tl(0);
resultopt1 = tcg_temp_new();
@@ -364,11 +388,17 @@ static void gen_arith(DisasContext *ctx, uint32_t opc,
int rd, int rs1,
break;
#if defined(TARGET_RISCV64)
case OPC_RISC_REMW:
+ if (!has_ext(ctx, RVM)) {
+ goto do_illegal;
+ }
tcg_gen_ext32s_tl(source1, source1);
tcg_gen_ext32s_tl(source2, source2);
/* fall through to REM */
#endif
case OPC_RISC_REM:
+ if (!has_ext(ctx, RVM)) {
+ goto do_illegal;
+ }
cond1 = tcg_temp_new();
cond2 = tcg_temp_new();
zeroreg = tcg_const_tl(0);
@@ -396,11 +426,17 @@ static void gen_arith(DisasContext *ctx, uint32_t opc,
int rd, int rs1,
break;
#if defined(TARGET_RISCV64)
case OPC_RISC_REMUW:
+ if (!has_ext(ctx, RVM)) {
+ goto do_illegal;
+ }
tcg_gen_ext32u_tl(source1, source1);
tcg_gen_ext32u_tl(source2, source2);
/* fall through to REMU */
#endif
case OPC_RISC_REMU:
+ if (!has_ext(ctx, RVM)) {
+ goto do_illegal;
+ }
cond1 = tcg_temp_new();
zeroreg = tcg_const_tl(0);
resultopt1 = tcg_temp_new();
@@ -418,6 +454,7 @@ static void gen_arith(DisasContext *ctx, uint32_t opc, int
rd, int rs1,
tcg_temp_free(zeroreg);
tcg_temp_free(resultopt1);
break;
+ do_illegal:
default:
gen_exception_illegal(ctx);
return;
@@ -698,13 +735,20 @@ static void gen_fp_load(DisasContext *ctx, uint32_t opc,
int rd,
switch (opc) {
case OPC_RISC_FLW:
+ if (!has_ext(ctx, RVF)) {
+ goto do_illegal;
+ }
tcg_gen_qemu_ld_i64(cpu_fpr[rd], t0, ctx->mem_idx, MO_TEUL);
/* RISC-V requires NaN-boxing of narrower width floating point values
*/
tcg_gen_ori_i64(cpu_fpr[rd], cpu_fpr[rd], 0xffffffff00000000ULL);
break;
case OPC_RISC_FLD:
+ if (!has_ext(ctx, RVD)) {
+ goto do_illegal;
+ }
tcg_gen_qemu_ld_i64(cpu_fpr[rd], t0, ctx->mem_idx, MO_TEQ);
break;
+ do_illegal:
default:
gen_exception_illegal(ctx);
break;
@@ -730,11 +774,18 @@ static void gen_fp_store(DisasContext *ctx, uint32_t opc,
int rs1,
switch (opc) {
case OPC_RISC_FSW:
+ if (!has_ext(ctx, RVF)) {
+ goto do_illegal;
+ }
tcg_gen_qemu_st_i64(cpu_fpr[rs2], t0, ctx->mem_idx, MO_TEUL);
break;
case OPC_RISC_FSD:
+ if (!has_ext(ctx, RVD)) {
+ goto do_illegal;
+ }
tcg_gen_qemu_st_i64(cpu_fpr[rs2], t0, ctx->mem_idx, MO_TEQ);
break;
+ do_illegal:
default:
gen_exception_illegal(ctx);
break;
@@ -898,15 +949,22 @@ static void gen_fp_fmadd(DisasContext *ctx, uint32_t opc,
int rd,
{
switch (opc) {
case OPC_RISC_FMADD_S:
+ if (!has_ext(ctx, RVF)) {
+ goto do_illegal;
+ }
gen_set_rm(ctx, rm);
gen_helper_fmadd_s(cpu_fpr[rd], cpu_env, cpu_fpr[rs1],
cpu_fpr[rs2], cpu_fpr[rs3]);
break;
case OPC_RISC_FMADD_D:
+ if (!has_ext(ctx, RVD)) {
+ goto do_illegal;
+ }
gen_set_rm(ctx, rm);
gen_helper_fmadd_d(cpu_fpr[rd], cpu_env, cpu_fpr[rs1],
cpu_fpr[rs2], cpu_fpr[rs3]);
break;
+ do_illegal:
default:
gen_exception_illegal(ctx);
break;
@@ -918,15 +976,22 @@ static void gen_fp_fmsub(DisasContext *ctx, uint32_t opc,
int rd,
{
switch (opc) {
case OPC_RISC_FMSUB_S:
+ if (!has_ext(ctx, RVF)) {
+ goto do_illegal;
+ }
gen_set_rm(ctx, rm);
gen_helper_fmsub_s(cpu_fpr[rd], cpu_env, cpu_fpr[rs1],
cpu_fpr[rs2], cpu_fpr[rs3]);
break;
case OPC_RISC_FMSUB_D:
+ if (!has_ext(ctx, RVD)) {
+ goto do_illegal;
+ }
gen_set_rm(ctx, rm);
gen_helper_fmsub_d(cpu_fpr[rd], cpu_env, cpu_fpr[rs1],
cpu_fpr[rs2], cpu_fpr[rs3]);
break;
+ do_illegal:
default:
gen_exception_illegal(ctx);
break;
@@ -938,15 +1003,22 @@ static void gen_fp_fnmsub(DisasContext *ctx, uint32_t
opc, int rd,
{
switch (opc) {
case OPC_RISC_FNMSUB_S:
+ if (!has_ext(ctx, RVF)) {
+ goto do_illegal;
+ }
gen_set_rm(ctx, rm);
gen_helper_fnmsub_s(cpu_fpr[rd], cpu_env, cpu_fpr[rs1],
cpu_fpr[rs2], cpu_fpr[rs3]);
break;
case OPC_RISC_FNMSUB_D:
+ if (!has_ext(ctx, RVD)) {
+ goto do_illegal;
+ }
gen_set_rm(ctx, rm);
gen_helper_fnmsub_d(cpu_fpr[rd], cpu_env, cpu_fpr[rs1],
cpu_fpr[rs2], cpu_fpr[rs3]);
break;
+ do_illegal:
default:
gen_exception_illegal(ctx);
break;
@@ -958,15 +1030,22 @@ static void gen_fp_fnmadd(DisasContext *ctx, uint32_t
opc, int rd,
{
switch (opc) {
case OPC_RISC_FNMADD_S:
+ if (!has_ext(ctx, RVF)) {
+ goto do_illegal;
+ }
gen_set_rm(ctx, rm);
gen_helper_fnmadd_s(cpu_fpr[rd], cpu_env, cpu_fpr[rs1],
cpu_fpr[rs2], cpu_fpr[rs3]);
break;
case OPC_RISC_FNMADD_D:
+ if (!has_ext(ctx, RVD)) {
+ goto do_illegal;
+ }
gen_set_rm(ctx, rm);
gen_helper_fnmadd_d(cpu_fpr[rd], cpu_env, cpu_fpr[rs1],
cpu_fpr[rs2], cpu_fpr[rs3]);
break;
+ do_illegal:
default:
gen_exception_illegal(ctx);
break;
@@ -985,30 +1064,51 @@ static void gen_fp_arith(DisasContext *ctx, uint32_t
opc, int rd,
switch (opc) {
case OPC_RISC_FADD_S:
+ if (!has_ext(ctx, RVF)) {
+ goto do_illegal;
+ }
gen_set_rm(ctx, rm);
gen_helper_fadd_s(cpu_fpr[rd], cpu_env, cpu_fpr[rs1], cpu_fpr[rs2]);
break;
case OPC_RISC_FSUB_S:
+ if (!has_ext(ctx, RVF)) {
+ goto do_illegal;
+ }
gen_set_rm(ctx, rm);
gen_helper_fsub_s(cpu_fpr[rd], cpu_env, cpu_fpr[rs1], cpu_fpr[rs2]);
break;
case OPC_RISC_FMUL_S:
+ if (!has_ext(ctx, RVF)) {
+ goto do_illegal;
+ }
gen_set_rm(ctx, rm);
gen_helper_fmul_s(cpu_fpr[rd], cpu_env, cpu_fpr[rs1], cpu_fpr[rs2]);
break;
case OPC_RISC_FDIV_S:
+ if (!has_ext(ctx, RVF)) {
+ goto do_illegal;
+ }
gen_set_rm(ctx, rm);
gen_helper_fdiv_s(cpu_fpr[rd], cpu_env, cpu_fpr[rs1], cpu_fpr[rs2]);
break;
case OPC_RISC_FSQRT_S:
+ if (!has_ext(ctx, RVF)) {
+ goto do_illegal;
+ }
gen_set_rm(ctx, rm);
gen_helper_fsqrt_s(cpu_fpr[rd], cpu_env, cpu_fpr[rs1]);
break;
case OPC_RISC_FSGNJ_S:
+ if (!has_ext(ctx, RVF)) {
+ goto do_illegal;
+ }
gen_fsgnj(ctx, rd, rs1, rs2, rm, INT32_MIN);
break;
case OPC_RISC_FMIN_S:
+ if (!has_ext(ctx, RVF)) {
+ goto do_illegal;
+ }
/* also handles: OPC_RISC_FMAX_S */
switch (rm) {
case 0x0:
@@ -1024,6 +1124,9 @@ static void gen_fp_arith(DisasContext *ctx, uint32_t opc,
int rd,
case OPC_RISC_FEQ_S:
/* also handles: OPC_RISC_FLT_S, OPC_RISC_FLE_S */
+ if (!has_ext(ctx, RVF)) {
+ goto do_illegal;
+ }
t0 = tcg_temp_new();
switch (rm) {
case 0x0:
@@ -1045,6 +1148,9 @@ static void gen_fp_arith(DisasContext *ctx, uint32_t opc,
int rd,
case OPC_RISC_FCVT_W_S:
/* also OPC_RISC_FCVT_WU_S, OPC_RISC_FCVT_L_S, OPC_RISC_FCVT_LU_S */
+ if (!has_ext(ctx, RVF)) {
+ goto do_illegal;
+ }
t0 = tcg_temp_new();
switch (rs2) {
case 0: /* FCVT_W_S */
@@ -1075,6 +1181,9 @@ static void gen_fp_arith(DisasContext *ctx, uint32_t opc,
int rd,
case OPC_RISC_FCVT_S_W:
/* also OPC_RISC_FCVT_S_WU, OPC_RISC_FCVT_S_L, OPC_RISC_FCVT_S_LU */
+ if (!has_ext(ctx, RVF)) {
+ goto do_illegal;
+ }
t0 = tcg_temp_new();
gen_get_gpr(t0, rs1);
switch (rs2) {
@@ -1104,6 +1213,9 @@ static void gen_fp_arith(DisasContext *ctx, uint32_t opc,
int rd,
case OPC_RISC_FMV_X_S:
/* also OPC_RISC_FCLASS_S */
+ if (!has_ext(ctx, RVF)) {
+ goto do_illegal;
+ }
t0 = tcg_temp_new();
switch (rm) {
case 0: /* FMV */
@@ -1125,6 +1237,9 @@ static void gen_fp_arith(DisasContext *ctx, uint32_t opc,
int rd,
break;
case OPC_RISC_FMV_S_X:
+ if (!has_ext(ctx, RVF)) {
+ goto do_illegal;
+ }
t0 = tcg_temp_new();
gen_get_gpr(t0, rs1);
#if defined(TARGET_RISCV64)
@@ -1137,22 +1252,37 @@ static void gen_fp_arith(DisasContext *ctx, uint32_t
opc, int rd,
/* double */
case OPC_RISC_FADD_D:
+ if (!has_ext(ctx, RVD)) {
+ goto do_illegal;
+ }
gen_set_rm(ctx, rm);
gen_helper_fadd_d(cpu_fpr[rd], cpu_env, cpu_fpr[rs1], cpu_fpr[rs2]);
break;
case OPC_RISC_FSUB_D:
+ if (!has_ext(ctx, RVD)) {
+ goto do_illegal;
+ }
gen_set_rm(ctx, rm);
gen_helper_fsub_d(cpu_fpr[rd], cpu_env, cpu_fpr[rs1], cpu_fpr[rs2]);
break;
case OPC_RISC_FMUL_D:
+ if (!has_ext(ctx, RVD)) {
+ goto do_illegal;
+ }
gen_set_rm(ctx, rm);
gen_helper_fmul_d(cpu_fpr[rd], cpu_env, cpu_fpr[rs1], cpu_fpr[rs2]);
break;
case OPC_RISC_FDIV_D:
+ if (!has_ext(ctx, RVD)) {
+ goto do_illegal;
+ }
gen_set_rm(ctx, rm);
gen_helper_fdiv_d(cpu_fpr[rd], cpu_env, cpu_fpr[rs1], cpu_fpr[rs2]);
break;
case OPC_RISC_FSQRT_D:
+ if (!has_ext(ctx, RVD)) {
+ goto do_illegal;
+ }
gen_set_rm(ctx, rm);
gen_helper_fsqrt_d(cpu_fpr[rd], cpu_env, cpu_fpr[rs1]);
break;
@@ -1162,6 +1292,9 @@ static void gen_fp_arith(DisasContext *ctx, uint32_t opc,
int rd,
case OPC_RISC_FMIN_D:
/* also OPC_RISC_FMAX_D */
+ if (!has_ext(ctx, RVD)) {
+ goto do_illegal;
+ }
switch (rm) {
case 0:
gen_helper_fmin_d(cpu_fpr[rd], cpu_env, cpu_fpr[rs1],
cpu_fpr[rs2]);
@@ -1175,6 +1308,9 @@ static void gen_fp_arith(DisasContext *ctx, uint32_t opc,
int rd,
break;
case OPC_RISC_FCVT_S_D:
+ if (!has_ext(ctx, RVD)) {
+ goto do_illegal;
+ }
switch (rs2) {
case 1:
gen_set_rm(ctx, rm);
@@ -1186,6 +1322,9 @@ static void gen_fp_arith(DisasContext *ctx, uint32_t opc,
int rd,
break;
case OPC_RISC_FCVT_D_S:
+ if (!has_ext(ctx, RVD)) {
+ goto do_illegal;
+ }
switch (rs2) {
case 0:
gen_set_rm(ctx, rm);
@@ -1198,6 +1337,9 @@ static void gen_fp_arith(DisasContext *ctx, uint32_t opc,
int rd,
case OPC_RISC_FEQ_D:
/* also OPC_RISC_FLT_D, OPC_RISC_FLE_D */
+ if (!has_ext(ctx, RVD)) {
+ goto do_illegal;
+ }
t0 = tcg_temp_new();
switch (rm) {
case 0:
@@ -1219,6 +1361,9 @@ static void gen_fp_arith(DisasContext *ctx, uint32_t opc,
int rd,
case OPC_RISC_FCVT_W_D:
/* also OPC_RISC_FCVT_WU_D, OPC_RISC_FCVT_L_D, OPC_RISC_FCVT_LU_D */
+ if (!has_ext(ctx, RVD)) {
+ goto do_illegal;
+ }
t0 = tcg_temp_new();
switch (rs2) {
case 0:
@@ -1249,6 +1394,9 @@ static void gen_fp_arith(DisasContext *ctx, uint32_t opc,
int rd,
case OPC_RISC_FCVT_D_W:
/* also OPC_RISC_FCVT_D_WU, OPC_RISC_FCVT_D_L, OPC_RISC_FCVT_D_LU */
+ if (!has_ext(ctx, RVD)) {
+ goto do_illegal;
+ }
t0 = tcg_temp_new();
gen_get_gpr(t0, rs1);
switch (rs2) {
@@ -1278,6 +1426,9 @@ static void gen_fp_arith(DisasContext *ctx, uint32_t opc,
int rd,
case OPC_RISC_FMV_X_D:
/* also OPC_RISC_FCLASS_D */
+ if (!has_ext(ctx, RVD)) {
+ goto do_illegal;
+ }
switch (rm) {
#if defined(TARGET_RISCV64)
case 0: /* FMV */
@@ -1298,6 +1449,9 @@ static void gen_fp_arith(DisasContext *ctx, uint32_t opc,
int rd,
#if defined(TARGET_RISCV64)
case OPC_RISC_FMV_D_X:
+ if (!has_ext(ctx, RVD)) {
+ goto do_illegal;
+ }
t0 = tcg_temp_new();
gen_get_gpr(t0, rs1);
tcg_gen_mov_tl(cpu_fpr[rd], t0);
@@ -1797,6 +1951,9 @@ static void decode_RV32_64G(DisasContext *ctx)
GET_STORE_IMM(ctx->opcode));
break;
case OPC_RISC_ATOMIC:
+ if (!has_ext(ctx, RVA)) {
+ goto do_illegal;
+ }
gen_atomic(ctx, MASK_OP_ATOMIC(ctx->opcode), rd, rs1, rs2);
break;
case OPC_RISC_FMADD:
@@ -1835,6 +1992,7 @@ static void decode_RV32_64G(DisasContext *ctx)
gen_system(ctx, MASK_OP_SYSTEM(ctx->opcode), rd, rs1,
(ctx->opcode & 0xFFF00000) >> 20);
break;
+ do_illegal:
default:
gen_exception_illegal(ctx);
break;
--
2.18.1
- [Qemu-riscv] [PULL 02/11] RISC-V: Mark mstatus.fs dirty, (continued)
- [Qemu-riscv] [PULL 02/11] RISC-V: Mark mstatus.fs dirty, Palmer Dabbelt, 2019/02/13
- [Qemu-riscv] [PULL 01/11] RISC-V: Split out mstatus_fs from tb_flags, Palmer Dabbelt, 2019/02/13
- [Qemu-riscv] [PULL 04/11] RISC-V: Use riscv prefix consistently on cpu helpers, Palmer Dabbelt, 2019/02/13
- [Qemu-riscv] [PULL 05/11] RISC-V: Add priv_ver to DisasContext, Palmer Dabbelt, 2019/02/13
- [Qemu-riscv] [PULL 11/11] riscv: Ensure the kernel start address is correctly cast, Palmer Dabbelt, 2019/02/13
- [Qemu-riscv] [PULL 09/11] MAINTAINERS: Remove Michael Clark as a RISC-V Maintainer, Palmer Dabbelt, 2019/02/13
- [Qemu-riscv] [PULL 08/11] RISC-V: Add misa runtime write support, Palmer Dabbelt, 2019/02/13
- [Qemu-riscv] [PULL 10/11] target/riscv: fix counter-enable checks in ctr(), Palmer Dabbelt, 2019/02/13
- [Qemu-riscv] [PULL 03/11] RISC-V: Implement mstatus.TSR/TW/TVM, Palmer Dabbelt, 2019/02/13
- [Qemu-riscv] [PULL 06/11] RISC-V: Add misa to DisasContext, Palmer Dabbelt, 2019/02/13
- [Qemu-riscv] [PULL 07/11] RISC-V: Add misa.MAFD checks to translate,
Palmer Dabbelt <=
- Re: [Qemu-riscv] [PULL] RISC-V Patches for the 4.0 Soft Freeze, Part 1, Peter Maydell, 2019/02/14