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qemu/target/mips/tcg/mips16e_translate.c.inc
Peter Maydell b35d74015b target/mips: Honour -semihosting-config userspace=on 
Honour the commandline -semihosting-config userspace=on option,
instead of always permitting userspace semihosting calls in system
emulation mode, by passing the correct value to the is_userspace
argument of semihosting_enabled().

Note that this is a behaviour change: if the user wants to
do semihosting calls from userspace they must now specifically
enable them on the command line.

MIPS semihosting is not implemented for linux-user builds.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220822141230.3658237-5-peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2022-09-13 17:18:21 +01:00

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/*
* MIPS16 extension (Code Compaction) ASE translation routines
*
* Copyright (c) 2004-2005 Jocelyn Mayer
* Copyright (c) 2006 Marius Groeger (FPU operations)
* Copyright (c) 2006 Thiemo Seufer (MIPS32R2 support)
* Copyright (c) 2009 CodeSourcery (MIPS16 and microMIPS support)
*
* SPDX-License-Identifier: LGPL-2.1-or-later
*/
/* MIPS16 major opcodes */
enum {
M16_OPC_ADDIUSP = 0x00,
M16_OPC_ADDIUPC = 0x01,
M16_OPC_B = 0x02,
M16_OPC_JAL = 0x03,
M16_OPC_BEQZ = 0x04,
M16_OPC_BNEQZ = 0x05,
M16_OPC_SHIFT = 0x06,
M16_OPC_LD = 0x07,
M16_OPC_RRIA = 0x08,
M16_OPC_ADDIU8 = 0x09,
M16_OPC_SLTI = 0x0a,
M16_OPC_SLTIU = 0x0b,
M16_OPC_I8 = 0x0c,
M16_OPC_LI = 0x0d,
M16_OPC_CMPI = 0x0e,
M16_OPC_SD = 0x0f,
M16_OPC_LB = 0x10,
M16_OPC_LH = 0x11,
M16_OPC_LWSP = 0x12,
M16_OPC_LW = 0x13,
M16_OPC_LBU = 0x14,
M16_OPC_LHU = 0x15,
M16_OPC_LWPC = 0x16,
M16_OPC_LWU = 0x17,
M16_OPC_SB = 0x18,
M16_OPC_SH = 0x19,
M16_OPC_SWSP = 0x1a,
M16_OPC_SW = 0x1b,
M16_OPC_RRR = 0x1c,
M16_OPC_RR = 0x1d,
M16_OPC_EXTEND = 0x1e,
M16_OPC_I64 = 0x1f
};
/* I8 funct field */
enum {
I8_BTEQZ = 0x0,
I8_BTNEZ = 0x1,
I8_SWRASP = 0x2,
I8_ADJSP = 0x3,
I8_SVRS = 0x4,
I8_MOV32R = 0x5,
I8_MOVR32 = 0x7
};
/* RRR f field */
enum {
RRR_DADDU = 0x0,
RRR_ADDU = 0x1,
RRR_DSUBU = 0x2,
RRR_SUBU = 0x3
};
/* RR funct field */
enum {
RR_JR = 0x00,
RR_SDBBP = 0x01,
RR_SLT = 0x02,
RR_SLTU = 0x03,
RR_SLLV = 0x04,
RR_BREAK = 0x05,
RR_SRLV = 0x06,
RR_SRAV = 0x07,
RR_DSRL = 0x08,
RR_CMP = 0x0a,
RR_NEG = 0x0b,
RR_AND = 0x0c,
RR_OR = 0x0d,
RR_XOR = 0x0e,
RR_NOT = 0x0f,
RR_MFHI = 0x10,
RR_CNVT = 0x11,
RR_MFLO = 0x12,
RR_DSRA = 0x13,
RR_DSLLV = 0x14,
RR_DSRLV = 0x16,
RR_DSRAV = 0x17,
RR_MULT = 0x18,
RR_MULTU = 0x19,
RR_DIV = 0x1a,
RR_DIVU = 0x1b,
RR_DMULT = 0x1c,
RR_DMULTU = 0x1d,
RR_DDIV = 0x1e,
RR_DDIVU = 0x1f
};
/* I64 funct field */
enum {
I64_LDSP = 0x0,
I64_SDSP = 0x1,
I64_SDRASP = 0x2,
I64_DADJSP = 0x3,
I64_LDPC = 0x4,
I64_DADDIU5 = 0x5,
I64_DADDIUPC = 0x6,
I64_DADDIUSP = 0x7
};
/* RR ry field for CNVT */
enum {
RR_RY_CNVT_ZEB = 0x0,
RR_RY_CNVT_ZEH = 0x1,
RR_RY_CNVT_ZEW = 0x2,
RR_RY_CNVT_SEB = 0x4,
RR_RY_CNVT_SEH = 0x5,
RR_RY_CNVT_SEW = 0x6,
};
static int xlat(int r)
{
static int map[] = { 16, 17, 2, 3, 4, 5, 6, 7 };
return map[r];
}
static void gen_mips16_save(DisasContext *ctx,
int xsregs, int aregs,
int do_ra, int do_s0, int do_s1,
int framesize)
{
TCGv t0 = tcg_temp_new();
TCGv t1 = tcg_temp_new();
TCGv t2 = tcg_temp_new();
int args, astatic;
switch (aregs) {
case 0:
case 1:
case 2:
case 3:
case 11:
args = 0;
break;
case 4:
case 5:
case 6:
case 7:
args = 1;
break;
case 8:
case 9:
case 10:
args = 2;
break;
case 12:
case 13:
args = 3;
break;
case 14:
args = 4;
break;
default:
gen_reserved_instruction(ctx);
return;
}
switch (args) {
case 4:
gen_base_offset_addr(ctx, t0, 29, 12);
gen_load_gpr(t1, 7);
tcg_gen_qemu_st_tl(t1, t0, ctx->mem_idx, MO_TEUL);
/* Fall through */
case 3:
gen_base_offset_addr(ctx, t0, 29, 8);
gen_load_gpr(t1, 6);
tcg_gen_qemu_st_tl(t1, t0, ctx->mem_idx, MO_TEUL);
/* Fall through */
case 2:
gen_base_offset_addr(ctx, t0, 29, 4);
gen_load_gpr(t1, 5);
tcg_gen_qemu_st_tl(t1, t0, ctx->mem_idx, MO_TEUL);
/* Fall through */
case 1:
gen_base_offset_addr(ctx, t0, 29, 0);
gen_load_gpr(t1, 4);
tcg_gen_qemu_st_tl(t1, t0, ctx->mem_idx, MO_TEUL);
}
gen_load_gpr(t0, 29);
#define DECR_AND_STORE(reg) do { \
tcg_gen_movi_tl(t2, -4); \
gen_op_addr_add(ctx, t0, t0, t2); \
gen_load_gpr(t1, reg); \
tcg_gen_qemu_st_tl(t1, t0, ctx->mem_idx, MO_TEUL); \
} while (0)
if (do_ra) {
DECR_AND_STORE(31);
}
switch (xsregs) {
case 7:
DECR_AND_STORE(30);
/* Fall through */
case 6:
DECR_AND_STORE(23);
/* Fall through */
case 5:
DECR_AND_STORE(22);
/* Fall through */
case 4:
DECR_AND_STORE(21);
/* Fall through */
case 3:
DECR_AND_STORE(20);
/* Fall through */
case 2:
DECR_AND_STORE(19);
/* Fall through */
case 1:
DECR_AND_STORE(18);
}
if (do_s1) {
DECR_AND_STORE(17);
}
if (do_s0) {
DECR_AND_STORE(16);
}
switch (aregs) {
case 0:
case 4:
case 8:
case 12:
case 14:
astatic = 0;
break;
case 1:
case 5:
case 9:
case 13:
astatic = 1;
break;
case 2:
case 6:
case 10:
astatic = 2;
break;
case 3:
case 7:
astatic = 3;
break;
case 11:
astatic = 4;
break;
default:
gen_reserved_instruction(ctx);
return;
}
if (astatic > 0) {
DECR_AND_STORE(7);
if (astatic > 1) {
DECR_AND_STORE(6);
if (astatic > 2) {
DECR_AND_STORE(5);
if (astatic > 3) {
DECR_AND_STORE(4);
}
}
}
}
#undef DECR_AND_STORE
tcg_gen_movi_tl(t2, -framesize);
gen_op_addr_add(ctx, cpu_gpr[29], cpu_gpr[29], t2);
tcg_temp_free(t0);
tcg_temp_free(t1);
tcg_temp_free(t2);
}
static void gen_mips16_restore(DisasContext *ctx,
int xsregs, int aregs,
int do_ra, int do_s0, int do_s1,
int framesize)
{
int astatic;
TCGv t0 = tcg_temp_new();
TCGv t1 = tcg_temp_new();
TCGv t2 = tcg_temp_new();
tcg_gen_movi_tl(t2, framesize);
gen_op_addr_add(ctx, t0, cpu_gpr[29], t2);
#define DECR_AND_LOAD(reg) do { \
tcg_gen_movi_tl(t2, -4); \
gen_op_addr_add(ctx, t0, t0, t2); \
tcg_gen_qemu_ld_tl(t1, t0, ctx->mem_idx, MO_TESL); \
gen_store_gpr(t1, reg); \
} while (0)
if (do_ra) {
DECR_AND_LOAD(31);
}
switch (xsregs) {
case 7:
DECR_AND_LOAD(30);
/* Fall through */
case 6:
DECR_AND_LOAD(23);
/* Fall through */
case 5:
DECR_AND_LOAD(22);
/* Fall through */
case 4:
DECR_AND_LOAD(21);
/* Fall through */
case 3:
DECR_AND_LOAD(20);
/* Fall through */
case 2:
DECR_AND_LOAD(19);
/* Fall through */
case 1:
DECR_AND_LOAD(18);
}
if (do_s1) {
DECR_AND_LOAD(17);
}
if (do_s0) {
DECR_AND_LOAD(16);
}
switch (aregs) {
case 0:
case 4:
case 8:
case 12:
case 14:
astatic = 0;
break;
case 1:
case 5:
case 9:
case 13:
astatic = 1;
break;
case 2:
case 6:
case 10:
astatic = 2;
break;
case 3:
case 7:
astatic = 3;
break;
case 11:
astatic = 4;
break;
default:
gen_reserved_instruction(ctx);
return;
}
if (astatic > 0) {
DECR_AND_LOAD(7);
if (astatic > 1) {
DECR_AND_LOAD(6);
if (astatic > 2) {
DECR_AND_LOAD(5);
if (astatic > 3) {
DECR_AND_LOAD(4);
}
}
}
}
#undef DECR_AND_LOAD
tcg_gen_movi_tl(t2, framesize);
gen_op_addr_add(ctx, cpu_gpr[29], cpu_gpr[29], t2);
tcg_temp_free(t0);
tcg_temp_free(t1);
tcg_temp_free(t2);
}
#if defined(TARGET_MIPS64)
static void decode_i64_mips16(DisasContext *ctx,
int ry, int funct, int16_t offset,
int extended)
{
switch (funct) {
case I64_LDSP:
check_insn(ctx, ISA_MIPS3);
check_mips_64(ctx);
offset = extended ? offset : offset << 3;
gen_ld(ctx, OPC_LD, ry, 29, offset);
break;
case I64_SDSP:
check_insn(ctx, ISA_MIPS3);
check_mips_64(ctx);
offset = extended ? offset : offset << 3;
gen_st(ctx, OPC_SD, ry, 29, offset);
break;
case I64_SDRASP:
check_insn(ctx, ISA_MIPS3);
check_mips_64(ctx);
offset = extended ? offset : (ctx->opcode & 0xff) << 3;
gen_st(ctx, OPC_SD, 31, 29, offset);
break;
case I64_DADJSP:
check_insn(ctx, ISA_MIPS3);
check_mips_64(ctx);
offset = extended ? offset : ((int8_t)ctx->opcode) << 3;
gen_arith_imm(ctx, OPC_DADDIU, 29, 29, offset);
break;
case I64_LDPC:
check_insn(ctx, ISA_MIPS3);
check_mips_64(ctx);
if (extended && (ctx->hflags & MIPS_HFLAG_BMASK)) {
gen_reserved_instruction(ctx);
} else {
offset = extended ? offset : offset << 3;
gen_ld(ctx, OPC_LDPC, ry, 0, offset);
}
break;
case I64_DADDIU5:
check_insn(ctx, ISA_MIPS3);
check_mips_64(ctx);
offset = extended ? offset : ((int8_t)(offset << 3)) >> 3;
gen_arith_imm(ctx, OPC_DADDIU, ry, ry, offset);
break;
case I64_DADDIUPC:
check_insn(ctx, ISA_MIPS3);
check_mips_64(ctx);
offset = extended ? offset : offset << 2;
gen_addiupc(ctx, ry, offset, 1, extended);
break;
case I64_DADDIUSP:
check_insn(ctx, ISA_MIPS3);
check_mips_64(ctx);
offset = extended ? offset : offset << 2;
gen_arith_imm(ctx, OPC_DADDIU, ry, 29, offset);
break;
}
}
#endif
static int decode_extended_mips16_opc(CPUMIPSState *env, DisasContext *ctx)
{
int extend = translator_lduw(env, &ctx->base, ctx->base.pc_next + 2);
int op, rx, ry, funct, sa;
int16_t imm, offset;
ctx->opcode = (ctx->opcode << 16) | extend;
op = (ctx->opcode >> 11) & 0x1f;
sa = (ctx->opcode >> 22) & 0x1f;
funct = (ctx->opcode >> 8) & 0x7;
rx = xlat((ctx->opcode >> 8) & 0x7);
ry = xlat((ctx->opcode >> 5) & 0x7);
offset = imm = (int16_t) (((ctx->opcode >> 16) & 0x1f) << 11
| ((ctx->opcode >> 21) & 0x3f) << 5
| (ctx->opcode & 0x1f));
/*
* The extended opcodes cleverly reuse the opcodes from their 16-bit
* counterparts.
*/
switch (op) {
case M16_OPC_ADDIUSP:
gen_arith_imm(ctx, OPC_ADDIU, rx, 29, imm);
break;
case M16_OPC_ADDIUPC:
gen_addiupc(ctx, rx, imm, 0, 1);
break;
case M16_OPC_B:
gen_compute_branch(ctx, OPC_BEQ, 4, 0, 0, offset << 1, 0);
/* No delay slot, so just process as a normal instruction */
break;
case M16_OPC_BEQZ:
gen_compute_branch(ctx, OPC_BEQ, 4, rx, 0, offset << 1, 0);
/* No delay slot, so just process as a normal instruction */
break;
case M16_OPC_BNEQZ:
gen_compute_branch(ctx, OPC_BNE, 4, rx, 0, offset << 1, 0);
/* No delay slot, so just process as a normal instruction */
break;
case M16_OPC_SHIFT:
switch (ctx->opcode & 0x3) {
case 0x0:
gen_shift_imm(ctx, OPC_SLL, rx, ry, sa);
break;
case 0x1:
#if defined(TARGET_MIPS64)
check_mips_64(ctx);
gen_shift_imm(ctx, OPC_DSLL, rx, ry, sa);
#else
gen_reserved_instruction(ctx);
#endif
break;
case 0x2:
gen_shift_imm(ctx, OPC_SRL, rx, ry, sa);
break;
case 0x3:
gen_shift_imm(ctx, OPC_SRA, rx, ry, sa);
break;
}
break;
#if defined(TARGET_MIPS64)
case M16_OPC_LD:
check_insn(ctx, ISA_MIPS3);
check_mips_64(ctx);
gen_ld(ctx, OPC_LD, ry, rx, offset);
break;
#endif
case M16_OPC_RRIA:
imm = ctx->opcode & 0xf;
imm = imm | ((ctx->opcode >> 20) & 0x7f) << 4;
imm = imm | ((ctx->opcode >> 16) & 0xf) << 11;
imm = (int16_t) (imm << 1) >> 1;
if ((ctx->opcode >> 4) & 0x1) {
#if defined(TARGET_MIPS64)
check_mips_64(ctx);
gen_arith_imm(ctx, OPC_DADDIU, ry, rx, imm);
#else
gen_reserved_instruction(ctx);
#endif
} else {
gen_arith_imm(ctx, OPC_ADDIU, ry, rx, imm);
}
break;
case M16_OPC_ADDIU8:
gen_arith_imm(ctx, OPC_ADDIU, rx, rx, imm);
break;
case M16_OPC_SLTI:
gen_slt_imm(ctx, OPC_SLTI, 24, rx, imm);
break;
case M16_OPC_SLTIU:
gen_slt_imm(ctx, OPC_SLTIU, 24, rx, imm);
break;
case M16_OPC_I8:
switch (funct) {
case I8_BTEQZ:
gen_compute_branch(ctx, OPC_BEQ, 4, 24, 0, offset << 1, 0);
break;
case I8_BTNEZ:
gen_compute_branch(ctx, OPC_BNE, 4, 24, 0, offset << 1, 0);
break;
case I8_SWRASP:
gen_st(ctx, OPC_SW, 31, 29, imm);
break;
case I8_ADJSP:
gen_arith_imm(ctx, OPC_ADDIU, 29, 29, imm);
break;
case I8_SVRS:
check_insn(ctx, ISA_MIPS_R1);
{
int xsregs = (ctx->opcode >> 24) & 0x7;
int aregs = (ctx->opcode >> 16) & 0xf;
int do_ra = (ctx->opcode >> 6) & 0x1;
int do_s0 = (ctx->opcode >> 5) & 0x1;
int do_s1 = (ctx->opcode >> 4) & 0x1;
int framesize = (((ctx->opcode >> 20) & 0xf) << 4
| (ctx->opcode & 0xf)) << 3;
if (ctx->opcode & (1 << 7)) {
gen_mips16_save(ctx, xsregs, aregs,
do_ra, do_s0, do_s1,
framesize);
} else {
gen_mips16_restore(ctx, xsregs, aregs,
do_ra, do_s0, do_s1,
framesize);
}
}
break;
default:
gen_reserved_instruction(ctx);
break;
}
break;
case M16_OPC_LI:
tcg_gen_movi_tl(cpu_gpr[rx], (uint16_t) imm);
break;
case M16_OPC_CMPI:
tcg_gen_xori_tl(cpu_gpr[24], cpu_gpr[rx], (uint16_t) imm);
break;
#if defined(TARGET_MIPS64)
case M16_OPC_SD:
check_insn(ctx, ISA_MIPS3);
check_mips_64(ctx);
gen_st(ctx, OPC_SD, ry, rx, offset);
break;
#endif
case M16_OPC_LB:
gen_ld(ctx, OPC_LB, ry, rx, offset);
break;
case M16_OPC_LH:
gen_ld(ctx, OPC_LH, ry, rx, offset);
break;
case M16_OPC_LWSP:
gen_ld(ctx, OPC_LW, rx, 29, offset);
break;
case M16_OPC_LW:
gen_ld(ctx, OPC_LW, ry, rx, offset);
break;
case M16_OPC_LBU:
gen_ld(ctx, OPC_LBU, ry, rx, offset);
break;
case M16_OPC_LHU:
gen_ld(ctx, OPC_LHU, ry, rx, offset);
break;
case M16_OPC_LWPC:
gen_ld(ctx, OPC_LWPC, rx, 0, offset);
break;
#if defined(TARGET_MIPS64)
case M16_OPC_LWU:
check_insn(ctx, ISA_MIPS3);
check_mips_64(ctx);
gen_ld(ctx, OPC_LWU, ry, rx, offset);
break;
#endif
case M16_OPC_SB:
gen_st(ctx, OPC_SB, ry, rx, offset);
break;
case M16_OPC_SH:
gen_st(ctx, OPC_SH, ry, rx, offset);
break;
case M16_OPC_SWSP:
gen_st(ctx, OPC_SW, rx, 29, offset);
break;
case M16_OPC_SW:
gen_st(ctx, OPC_SW, ry, rx, offset);
break;
#if defined(TARGET_MIPS64)
case M16_OPC_I64:
decode_i64_mips16(ctx, ry, funct, offset, 1);
break;
#endif
default:
gen_reserved_instruction(ctx);
break;
}
return 4;
}
static int decode_ase_mips16e(CPUMIPSState *env, DisasContext *ctx)
{
int rx, ry;
int sa;
int op, cnvt_op, op1, offset;
int funct;
int n_bytes;
op = (ctx->opcode >> 11) & 0x1f;
sa = (ctx->opcode >> 2) & 0x7;
sa = sa == 0 ? 8 : sa;
rx = xlat((ctx->opcode >> 8) & 0x7);
cnvt_op = (ctx->opcode >> 5) & 0x7;
ry = xlat((ctx->opcode >> 5) & 0x7);
op1 = offset = ctx->opcode & 0x1f;
n_bytes = 2;
switch (op) {
case M16_OPC_ADDIUSP:
{
int16_t imm = ((uint8_t) ctx->opcode) << 2;
gen_arith_imm(ctx, OPC_ADDIU, rx, 29, imm);
}
break;
case M16_OPC_ADDIUPC:
gen_addiupc(ctx, rx, ((uint8_t) ctx->opcode) << 2, 0, 0);
break;
case M16_OPC_B:
offset = (ctx->opcode & 0x7ff) << 1;
offset = (int16_t)(offset << 4) >> 4;
gen_compute_branch(ctx, OPC_BEQ, 2, 0, 0, offset, 0);
/* No delay slot, so just process as a normal instruction */
break;
case M16_OPC_JAL:
offset = translator_lduw(env, &ctx->base, ctx->base.pc_next + 2);
offset = (((ctx->opcode & 0x1f) << 21)
| ((ctx->opcode >> 5) & 0x1f) << 16
| offset) << 2;
op = ((ctx->opcode >> 10) & 0x1) ? OPC_JALX : OPC_JAL;
gen_compute_branch(ctx, op, 4, rx, ry, offset, 2);
n_bytes = 4;
break;
case M16_OPC_BEQZ:
gen_compute_branch(ctx, OPC_BEQ, 2, rx, 0,
((int8_t)ctx->opcode) << 1, 0);
/* No delay slot, so just process as a normal instruction */
break;
case M16_OPC_BNEQZ:
gen_compute_branch(ctx, OPC_BNE, 2, rx, 0,
((int8_t)ctx->opcode) << 1, 0);
/* No delay slot, so just process as a normal instruction */
break;
case M16_OPC_SHIFT:
switch (ctx->opcode & 0x3) {
case 0x0:
gen_shift_imm(ctx, OPC_SLL, rx, ry, sa);
break;
case 0x1:
#if defined(TARGET_MIPS64)
check_insn(ctx, ISA_MIPS3);
check_mips_64(ctx);
gen_shift_imm(ctx, OPC_DSLL, rx, ry, sa);
#else
gen_reserved_instruction(ctx);
#endif
break;
case 0x2:
gen_shift_imm(ctx, OPC_SRL, rx, ry, sa);
break;
case 0x3:
gen_shift_imm(ctx, OPC_SRA, rx, ry, sa);
break;
}
break;
#if defined(TARGET_MIPS64)
case M16_OPC_LD:
check_insn(ctx, ISA_MIPS3);
check_mips_64(ctx);
gen_ld(ctx, OPC_LD, ry, rx, offset << 3);
break;
#endif
case M16_OPC_RRIA:
{
int16_t imm = (int8_t)((ctx->opcode & 0xf) << 4) >> 4;
if ((ctx->opcode >> 4) & 1) {
#if defined(TARGET_MIPS64)
check_insn(ctx, ISA_MIPS3);
check_mips_64(ctx);
gen_arith_imm(ctx, OPC_DADDIU, ry, rx, imm);
#else
gen_reserved_instruction(ctx);
#endif
} else {
gen_arith_imm(ctx, OPC_ADDIU, ry, rx, imm);
}
}
break;
case M16_OPC_ADDIU8:
{
int16_t imm = (int8_t) ctx->opcode;
gen_arith_imm(ctx, OPC_ADDIU, rx, rx, imm);
}
break;
case M16_OPC_SLTI:
{
int16_t imm = (uint8_t) ctx->opcode;
gen_slt_imm(ctx, OPC_SLTI, 24, rx, imm);
}
break;
case M16_OPC_SLTIU:
{
int16_t imm = (uint8_t) ctx->opcode;
gen_slt_imm(ctx, OPC_SLTIU, 24, rx, imm);
}
break;
case M16_OPC_I8:
{
int reg32;
funct = (ctx->opcode >> 8) & 0x7;
switch (funct) {
case I8_BTEQZ:
gen_compute_branch(ctx, OPC_BEQ, 2, 24, 0,
((int8_t)ctx->opcode) << 1, 0);
break;
case I8_BTNEZ:
gen_compute_branch(ctx, OPC_BNE, 2, 24, 0,
((int8_t)ctx->opcode) << 1, 0);
break;
case I8_SWRASP:
gen_st(ctx, OPC_SW, 31, 29, (ctx->opcode & 0xff) << 2);
break;
case I8_ADJSP:
gen_arith_imm(ctx, OPC_ADDIU, 29, 29,
((int8_t)ctx->opcode) << 3);
break;
case I8_SVRS:
check_insn(ctx, ISA_MIPS_R1);
{
int do_ra = ctx->opcode & (1 << 6);
int do_s0 = ctx->opcode & (1 << 5);
int do_s1 = ctx->opcode & (1 << 4);
int framesize = ctx->opcode & 0xf;
if (framesize == 0) {
framesize = 128;
} else {
framesize = framesize << 3;
}
if (ctx->opcode & (1 << 7)) {
gen_mips16_save(ctx, 0, 0,
do_ra, do_s0, do_s1, framesize);
} else {
gen_mips16_restore(ctx, 0, 0,
do_ra, do_s0, do_s1, framesize);
}
}
break;
case I8_MOV32R:
{
int rz = xlat(ctx->opcode & 0x7);
reg32 = (((ctx->opcode >> 3) & 0x3) << 3) |
((ctx->opcode >> 5) & 0x7);
gen_arith(ctx, OPC_ADDU, reg32, rz, 0);
}
break;
case I8_MOVR32:
reg32 = ctx->opcode & 0x1f;
gen_arith(ctx, OPC_ADDU, ry, reg32, 0);
break;
default:
gen_reserved_instruction(ctx);
break;
}
}
break;
case M16_OPC_LI:
{
int16_t imm = (uint8_t) ctx->opcode;
gen_arith_imm(ctx, OPC_ADDIU, rx, 0, imm);
}
break;
case M16_OPC_CMPI:
{
int16_t imm = (uint8_t) ctx->opcode;
gen_logic_imm(ctx, OPC_XORI, 24, rx, imm);
}
break;
#if defined(TARGET_MIPS64)
case M16_OPC_SD:
check_insn(ctx, ISA_MIPS3);
check_mips_64(ctx);
gen_st(ctx, OPC_SD, ry, rx, offset << 3);
break;
#endif
case M16_OPC_LB:
gen_ld(ctx, OPC_LB, ry, rx, offset);
break;
case M16_OPC_LH:
gen_ld(ctx, OPC_LH, ry, rx, offset << 1);
break;
case M16_OPC_LWSP:
gen_ld(ctx, OPC_LW, rx, 29, ((uint8_t)ctx->opcode) << 2);
break;
case M16_OPC_LW:
gen_ld(ctx, OPC_LW, ry, rx, offset << 2);
break;
case M16_OPC_LBU:
gen_ld(ctx, OPC_LBU, ry, rx, offset);
break;
case M16_OPC_LHU:
gen_ld(ctx, OPC_LHU, ry, rx, offset << 1);
break;
case M16_OPC_LWPC:
gen_ld(ctx, OPC_LWPC, rx, 0, ((uint8_t)ctx->opcode) << 2);
break;
#if defined(TARGET_MIPS64)
case M16_OPC_LWU:
check_insn(ctx, ISA_MIPS3);
check_mips_64(ctx);
gen_ld(ctx, OPC_LWU, ry, rx, offset << 2);
break;
#endif
case M16_OPC_SB:
gen_st(ctx, OPC_SB, ry, rx, offset);
break;
case M16_OPC_SH:
gen_st(ctx, OPC_SH, ry, rx, offset << 1);
break;
case M16_OPC_SWSP:
gen_st(ctx, OPC_SW, rx, 29, ((uint8_t)ctx->opcode) << 2);
break;
case M16_OPC_SW:
gen_st(ctx, OPC_SW, ry, rx, offset << 2);
break;
case M16_OPC_RRR:
{
int rz = xlat((ctx->opcode >> 2) & 0x7);
int mips32_op;
switch (ctx->opcode & 0x3) {
case RRR_ADDU:
mips32_op = OPC_ADDU;
break;
case RRR_SUBU:
mips32_op = OPC_SUBU;
break;
#if defined(TARGET_MIPS64)
case RRR_DADDU:
mips32_op = OPC_DADDU;
check_insn(ctx, ISA_MIPS3);
check_mips_64(ctx);
break;
case RRR_DSUBU:
mips32_op = OPC_DSUBU;
check_insn(ctx, ISA_MIPS3);
check_mips_64(ctx);
break;
#endif
default:
gen_reserved_instruction(ctx);
goto done;
}
gen_arith(ctx, mips32_op, rz, rx, ry);
done:
;
}
break;
case M16_OPC_RR:
switch (op1) {
case RR_JR:
{
int nd = (ctx->opcode >> 7) & 0x1;
int link = (ctx->opcode >> 6) & 0x1;
int ra = (ctx->opcode >> 5) & 0x1;
if (nd) {
check_insn(ctx, ISA_MIPS_R1);
}
if (link) {
op = OPC_JALR;
} else {
op = OPC_JR;
}
gen_compute_branch(ctx, op, 2, ra ? 31 : rx, 31, 0,
(nd ? 0 : 2));
}
break;
case RR_SDBBP:
if (is_uhi(ctx, extract32(ctx->opcode, 5, 6))) {
ctx->base.is_jmp = DISAS_SEMIHOST;
} else {
/*
* XXX: not clear which exception should be raised
* when in debug mode...
*/
check_insn(ctx, ISA_MIPS_R1);
generate_exception_end(ctx, EXCP_DBp);
}
break;
case RR_SLT:
gen_slt(ctx, OPC_SLT, 24, rx, ry);
break;
case RR_SLTU:
gen_slt(ctx, OPC_SLTU, 24, rx, ry);
break;
case RR_BREAK:
generate_exception_break(ctx, extract32(ctx->opcode, 5, 6));
break;
case RR_SLLV:
gen_shift(ctx, OPC_SLLV, ry, rx, ry);
break;
case RR_SRLV:
gen_shift(ctx, OPC_SRLV, ry, rx, ry);
break;
case RR_SRAV:
gen_shift(ctx, OPC_SRAV, ry, rx, ry);
break;
#if defined(TARGET_MIPS64)
case RR_DSRL:
check_insn(ctx, ISA_MIPS3);
check_mips_64(ctx);
gen_shift_imm(ctx, OPC_DSRL, ry, ry, sa);
break;
#endif
case RR_CMP:
gen_logic(ctx, OPC_XOR, 24, rx, ry);
break;
case RR_NEG:
gen_arith(ctx, OPC_SUBU, rx, 0, ry);
break;
case RR_AND:
gen_logic(ctx, OPC_AND, rx, rx, ry);
break;
case RR_OR:
gen_logic(ctx, OPC_OR, rx, rx, ry);
break;
case RR_XOR:
gen_logic(ctx, OPC_XOR, rx, rx, ry);
break;
case RR_NOT:
gen_logic(ctx, OPC_NOR, rx, ry, 0);
break;
case RR_MFHI:
gen_HILO(ctx, OPC_MFHI, 0, rx);
break;
case RR_CNVT:
check_insn(ctx, ISA_MIPS_R1);
switch (cnvt_op) {
case RR_RY_CNVT_ZEB:
tcg_gen_ext8u_tl(cpu_gpr[rx], cpu_gpr[rx]);
break;
case RR_RY_CNVT_ZEH:
tcg_gen_ext16u_tl(cpu_gpr[rx], cpu_gpr[rx]);
break;
case RR_RY_CNVT_SEB:
tcg_gen_ext8s_tl(cpu_gpr[rx], cpu_gpr[rx]);
break;
case RR_RY_CNVT_SEH:
tcg_gen_ext16s_tl(cpu_gpr[rx], cpu_gpr[rx]);
break;
#if defined(TARGET_MIPS64)
case RR_RY_CNVT_ZEW:
check_insn(ctx, ISA_MIPS_R1);
check_mips_64(ctx);
tcg_gen_ext32u_tl(cpu_gpr[rx], cpu_gpr[rx]);
break;
case RR_RY_CNVT_SEW:
check_insn(ctx, ISA_MIPS_R1);
check_mips_64(ctx);
tcg_gen_ext32s_tl(cpu_gpr[rx], cpu_gpr[rx]);
break;
#endif
default:
gen_reserved_instruction(ctx);
break;
}
break;
case RR_MFLO:
gen_HILO(ctx, OPC_MFLO, 0, rx);
break;
#if defined(TARGET_MIPS64)
case RR_DSRA:
check_insn(ctx, ISA_MIPS3);
check_mips_64(ctx);
gen_shift_imm(ctx, OPC_DSRA, ry, ry, sa);
break;
case RR_DSLLV:
check_insn(ctx, ISA_MIPS3);
check_mips_64(ctx);
gen_shift(ctx, OPC_DSLLV, ry, rx, ry);
break;
case RR_DSRLV:
check_insn(ctx, ISA_MIPS3);
check_mips_64(ctx);
gen_shift(ctx, OPC_DSRLV, ry, rx, ry);
break;
case RR_DSRAV:
check_insn(ctx, ISA_MIPS3);
check_mips_64(ctx);
gen_shift(ctx, OPC_DSRAV, ry, rx, ry);
break;
#endif
case RR_MULT:
gen_muldiv(ctx, OPC_MULT, 0, rx, ry);
break;
case RR_MULTU:
gen_muldiv(ctx, OPC_MULTU, 0, rx, ry);
break;
case RR_DIV:
gen_muldiv(ctx, OPC_DIV, 0, rx, ry);
break;
case RR_DIVU:
gen_muldiv(ctx, OPC_DIVU, 0, rx, ry);
break;
#if defined(TARGET_MIPS64)
case RR_DMULT:
check_insn(ctx, ISA_MIPS3);
check_mips_64(ctx);
gen_muldiv(ctx, OPC_DMULT, 0, rx, ry);
break;
case RR_DMULTU:
check_insn(ctx, ISA_MIPS3);
check_mips_64(ctx);
gen_muldiv(ctx, OPC_DMULTU, 0, rx, ry);
break;
case RR_DDIV:
check_insn(ctx, ISA_MIPS3);
check_mips_64(ctx);
gen_muldiv(ctx, OPC_DDIV, 0, rx, ry);
break;
case RR_DDIVU:
check_insn(ctx, ISA_MIPS3);
check_mips_64(ctx);
gen_muldiv(ctx, OPC_DDIVU, 0, rx, ry);
break;
#endif
default:
gen_reserved_instruction(ctx);
break;
}
break;
case M16_OPC_EXTEND:
decode_extended_mips16_opc(env, ctx);
n_bytes = 4;
break;
#if defined(TARGET_MIPS64)
case M16_OPC_I64:
funct = (ctx->opcode >> 8) & 0x7;
decode_i64_mips16(ctx, ry, funct, offset, 0);
break;
#endif
default:
gen_reserved_instruction(ctx);
break;
}
return n_bytes;
}
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