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target/m68k: add move16 

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

Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20180104012913.30763-9-laurent@vivier.eu>
This commit is contained in:
Laurent Vivier 2018-01-04 02:29:04 +01:00
parent 8bf6cbaf39
commit 9d4f0429f3
3 changed files with 82 additions and 1 deletions
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10
target/m68k/cpu.c
View File

@ -137,7 +137,15 @@ static void m68020_cpu_initfn(Object *obj)
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(Object *obj)
{
M68kCPU *cpu = M68K_CPU(obj);
CPUM68KState *env = &cpu->env;
m68020_cpu_initfn(obj);
m68k_set_feature(env, M68K_FEATURE_M68040);
}
static void m68060_cpu_initfn(Object *obj)
{

1
target/m68k/cpu.h
View File

@ -306,6 +306,7 @@ 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)

72
target/m68k/translate.c
View File

@ -4277,6 +4277,76 @@ DISAS_INSN(chk2)
tcg_temp_free(reg);
}
static void m68k_copy_line(TCGv dst, TCGv src, int index)
{
TCGv addr;
TCGv_i64 t0, t1;
addr = tcg_temp_new();
t0 = tcg_temp_new_i64();
t1 = tcg_temp_new_i64();
tcg_gen_andi_i32(addr, src, ~15);
tcg_gen_qemu_ld64(t0, addr, index);
tcg_gen_addi_i32(addr, addr, 8);
tcg_gen_qemu_ld64(t1, addr, index);
tcg_gen_andi_i32(addr, dst, ~15);
tcg_gen_qemu_st64(t0, addr, index);
tcg_gen_addi_i32(addr, addr, 8);
tcg_gen_qemu_st64(t1, addr, index);
tcg_temp_free_i64(t0);
tcg_temp_free_i64(t1);
tcg_temp_free(addr);
}
DISAS_INSN(move16_reg)
{
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(AREG(ext, 12), AREG(insn, 0), index);
/* Ax can be Ay, so save Ay before incrementing Ax */
tmp = tcg_temp_new();
tcg_gen_mov_i32(tmp, AREG(ext, 12));
tcg_gen_addi_i32(AREG(insn, 0), AREG(insn, 0), 16);
tcg_gen_addi_i32(AREG(ext, 12), tmp, 16);
tcg_temp_free(tmp);
}
DISAS_INSN(move16_mem)
{
int index = IS_USER(s);
TCGv reg, addr;
reg = AREG(insn, 0);
addr = tcg_const_i32(read_im32(env, s));
if ((insn >> 3) & 1) {
/* MOVE16 (xxx).L, (Ay) */
m68k_copy_line(reg, addr, index);
} else {
/* MOVE16 (Ay), (xxx).L */
m68k_copy_line(addr, reg, index);
}
tcg_temp_free(addr);
if (((insn >> 3) & 2) == 0) {
/* (Ay)+ */
tcg_gen_addi_i32(reg, reg, 16);
}
}
static TCGv gen_get_sr(DisasContext *s)
{
TCGv ccr;
@ -5578,6 +5648,8 @@ 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