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target/m68k: add move16

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move16 moves the source line to the destination line. Lines are aligned
to 16-byte boundaries and are 16 bytes long.

Backports commit 9d4f0429f3dc1dc6c67de3eaa3106e6c1cfa1524 from qemu
This commit is contained in:
Laurent Vivier 2018-03-06 08:14:17 -05:00 committed by Lioncash
parent c652028eb5
commit 03096cb560
No known key found for this signature in database
GPG key ID: 4E3C3CC1031BA9C7
3 changed files with 85 additions and 1 deletions
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10
qemu/target/m68k/cpu.c
View file

@ -131,7 +131,15 @@ static void m68020_cpu_initfn(struct uc_struct *uc, Object *obj, void *opaque)
m68k_set_feature(env, M68K_FEATURE_CHK2);
}
#define m68030_cpu_initfn m68020_cpu_initfn
#define m68040_cpu_initfn m68020_cpu_initfn
static void m68040_cpu_initfn(struct uc_struct *uc, Object *obj, void *opaque)
{
M68kCPU *cpu = M68K_CPU(uc, obj);
CPUM68KState *env = &cpu->env;
m68020_cpu_initfn(uc, obj, opaque);
m68k_set_feature(env, M68K_FEATURE_M68040);
}
static void m68060_cpu_initfn(struct uc_struct *uc, Object *obj, void *opaque)
{

1
qemu/target/m68k/cpu.h
View file

@ -304,6 +304,7 @@ enum m68k_features {
M68K_FEATURE_BKPT,
M68K_FEATURE_RTD,
M68K_FEATURE_CHK2,
M68K_FEATURE_M68040, /* instructions specific to MC68040 */
};
static inline int m68k_feature(CPUM68KState *env, int feature)

75
qemu/target/m68k/translate.c
View file

@ -4445,6 +4445,79 @@ DISAS_INSN(chk2)
tcg_temp_free(tcg_ctx, reg);
}
static void m68k_copy_line(DisasContext *s, TCGv dst, TCGv src, int index)
{
TCGContext *tcg_ctx = s->uc->tcg_ctx;
TCGv addr;
TCGv_i64 t0, t1;
addr = tcg_temp_new(tcg_ctx);
t0 = tcg_temp_new_i64(tcg_ctx);
t1 = tcg_temp_new_i64(tcg_ctx);
tcg_gen_andi_i32(tcg_ctx, addr, src, ~15);
tcg_gen_qemu_ld64(s->uc, t0, addr, index);
tcg_gen_addi_i32(tcg_ctx, addr, addr, 8);
tcg_gen_qemu_ld64(s->uc, t1, addr, index);
tcg_gen_andi_i32(tcg_ctx, addr, dst, ~15);
tcg_gen_qemu_st64(s->uc, t0, addr, index);
tcg_gen_addi_i32(tcg_ctx, addr, addr, 8);
tcg_gen_qemu_st64(s->uc, t1, addr, index);
tcg_temp_free_i64(tcg_ctx, t0);
tcg_temp_free_i64(tcg_ctx, t1);
tcg_temp_free(tcg_ctx, addr);
}
DISAS_INSN(move16_reg)
{
TCGContext *tcg_ctx = s->uc->tcg_ctx;
int index = IS_USER(s);
TCGv tmp;
uint16_t ext;
ext = read_im16(env, s);
if ((ext & (1 << 15)) == 0) {
gen_exception(s, s->insn_pc, EXCP_ILLEGAL);
}
m68k_copy_line(s, AREG(ext, 12), AREG(insn, 0), index);
/* Ax can be Ay, so save Ay before incrementing Ax */
tmp = tcg_temp_new(tcg_ctx);
tcg_gen_mov_i32(tcg_ctx, tmp, AREG(ext, 12));
tcg_gen_addi_i32(tcg_ctx, AREG(insn, 0), AREG(insn, 0), 16);
tcg_gen_addi_i32(tcg_ctx, AREG(ext, 12), tmp, 16);
tcg_temp_free(tcg_ctx, tmp);
}
DISAS_INSN(move16_mem)
{
TCGContext *tcg_ctx = s->uc->tcg_ctx;
int index = IS_USER(s);
TCGv reg, addr;
reg = AREG(insn, 0);
addr = tcg_const_i32(tcg_ctx, read_im32(env, s));
if ((insn >> 3) & 1) {
/* MOVE16 (xxx).L, (Ay) */
m68k_copy_line(s, reg, addr, index);
} else {
/* MOVE16 (Ay), (xxx).L */
m68k_copy_line(s, addr, reg, index);
}
tcg_temp_free(tcg_ctx, addr);
if (((insn >> 3) & 2) == 0) {
/* (Ay)+ */
tcg_gen_addi_i32(tcg_ctx, reg, reg, 16);
}
}
static TCGv gen_get_sr(DisasContext *s)
{
TCGContext *tcg_ctx = s->uc->tcg_ctx;
@ -5785,6 +5858,8 @@ void register_m68k_insns (CPUM68KState *env)
INSN(fsave, f300, ffc0, FPU);
INSN(intouch, f340, ffc0, CF_ISA_A);
INSN(cpushl, f428, ff38, CF_ISA_A);
INSN(move16_mem, f600, ffe0, M68040);
INSN(move16_reg, f620, fff8, M68040);
INSN(wddata, fb00, ff00, CF_ISA_A);
INSN(wdebug, fbc0, ffc0, CF_ISA_A);
#undef INSN