ColdFire EMAC support.

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2895 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
pbrook 2007-05-29 14:57:59 +00:00
parent 2b8bdefc3a
commit acf930aaa3
6 changed files with 763 additions and 3 deletions

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@ -196,7 +196,9 @@ static inline TranslationBlock *tb_find_fast(void)
cs_base = 0;
pc = env->PC;
#elif defined(TARGET_M68K)
flags = (env->fpcr & M68K_FPCR_PREC) | (env->sr & SR_S);
flags = (env->fpcr & M68K_FPCR_PREC) /* Bit 6 */
| (env->sr & SR_S) /* Bit 13 */
| ((env->macsr >> 4) & 0xf); /* Bits 0-3 */
cs_base = 0;
pc = env->pc;
#elif defined(TARGET_SH4)

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@ -71,6 +71,14 @@ typedef struct CPUM68KState {
uint32_t fpsr;
float_status fp_status;
uint64_t mactmp;
/* EMAC Hardware deals with 48-bit values composed of one 32-bit and
two 8-bit parts. We store a single 64-bit value and
rearrange/extend this when changing modes. */
uint64_t macc[4];
uint32_t macsr;
uint32_t mac_mask;
/* Temporary storage for DIV helpers. */
uint32_t div1;
uint32_t div2;
@ -143,11 +151,22 @@ enum {
#define SR_S 0x2000
#define SR_T 0x8000
#define MACSR_PAV0 0x100
#define MACSR_OMC 0x080
#define MACSR_SU 0x040
#define MACSR_FI 0x020
#define MACSR_RT 0x010
#define MACSR_N 0x008
#define MACSR_Z 0x004
#define MACSR_V 0x002
#define MACSR_EV 0x001
typedef struct m68k_def_t m68k_def_t;
int cpu_m68k_set_model(CPUM68KState *env, const char * name);
void m68k_set_irq_level(CPUM68KState *env, int level, uint8_t vector);
void m68k_set_macsr(CPUM68KState *env, uint32_t val);
#define M68K_FPCR_PREC (1 << 6)

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@ -69,7 +69,6 @@ int cpu_m68k_set_model(CPUM68KState *env, const char * name)
m68k_set_feature(env, M68K_FEATURE_CF_ISA_B);
m68k_set_feature(env, M68K_FEATURE_CF_ISA_C);
m68k_set_feature(env, M68K_FEATURE_CF_FPU);
m68k_set_feature(env, M68K_FEATURE_CF_MAC);
m68k_set_feature(env, M68K_FEATURE_CF_EMAC);
break;
case M68K_CPUID_ANY:
@ -77,7 +76,8 @@ int cpu_m68k_set_model(CPUM68KState *env, const char * name)
m68k_set_feature(env, M68K_FEATURE_CF_ISA_B);
m68k_set_feature(env, M68K_FEATURE_CF_ISA_C);
m68k_set_feature(env, M68K_FEATURE_CF_FPU);
m68k_set_feature(env, M68K_FEATURE_CF_MAC);
/* MAC and EMAC are mututally exclusive, so pick EMAC.
It's mostly backwards compatible. */
m68k_set_feature(env, M68K_FEATURE_CF_EMAC);
m68k_set_feature(env, M68K_FEATURE_EXT_FULL);
break;
@ -227,6 +227,40 @@ void helper_movec(CPUM68KState *env, int reg, uint32_t val)
}
}
void m68k_set_macsr(CPUM68KState *env, uint32_t val)
{
uint32_t acc;
int8_t exthigh;
uint8_t extlow;
uint64_t regval;
int i;
if ((env->macsr ^ val) & (MACSR_FI | MACSR_SU)) {
for (i = 0; i < 4; i++) {
regval = env->macc[i];
exthigh = regval >> 40;
if (env->macsr & MACSR_FI) {
acc = regval >> 8;
extlow = regval;
} else {
acc = regval;
extlow = regval >> 32;
}
if (env->macsr & MACSR_FI) {
regval = (((uint64_t)acc) << 8) | extlow;
regval |= ((int64_t)exthigh) << 40;
} else if (env->macsr & MACSR_SU) {
regval = acc | (((int64_t)extlow) << 32);
regval |= ((int64_t)exthigh) << 40;
} else {
regval = acc | (((uint64_t)extlow) << 32);
regval |= ((uint64_t)(uint8_t)exthigh) << 40;
}
env->macc[i] = regval;
}
}
env->macsr = val;
}
/* MMU */
/* TODO: This will need fixing once the MMU is implemented. */

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@ -285,6 +285,16 @@ OP(shr_cc)
FORCE_RET();
}
OP(sar32)
{
int32_t op2 = get_op(PARAM2);
uint32_t op3 = get_op(PARAM3);
uint32_t result;
result = op2 >> op3;
set_op(PARAM1, result);
FORCE_RET();
}
OP(sar_cc)
{
int32_t op1 = get_op(PARAM1);
@ -651,3 +661,410 @@ OP(movec)
#define MEMSUFFIX _kernel
#include "op_mem.h"
#endif
/* MAC unit. */
/* TODO: The MAC instructions use 64-bit arithmetic fairly extensively.
This results in fairly large ops (and sometimes other issues) on 32-bit
hosts. Maybe move most of them into helpers. */
OP(macmuls)
{
uint32_t op1 = get_op(PARAM1);
uint32_t op2 = get_op(PARAM2);
int64_t product;
int64_t res;
product = (uint64_t)op1 * op2;
res = (product << 24) >> 24;
if (res != product) {
env->macsr |= MACSR_V;
if (env->macsr & MACSR_OMC) {
/* Make sure the accumulate operation overflows. */
if (product < 0)
res = ~(1ll << 50);
else
res = 1ll << 50;
}
}
env->mactmp = res;
FORCE_RET();
}
OP(macmulu)
{
uint32_t op1 = get_op(PARAM1);
uint32_t op2 = get_op(PARAM2);
uint64_t product;
product = (uint64_t)op1 * op2;
if (product & (0xffffffull << 40)) {
env->macsr |= MACSR_V;
if (env->macsr & MACSR_OMC) {
/* Make sure the accumulate operation overflows. */
product = 1ll << 50;
} else {
product &= ((1ull << 40) - 1);
}
}
env->mactmp = product;
FORCE_RET();
}
OP(macmulf)
{
int32_t op1 = get_op(PARAM1);
int32_t op2 = get_op(PARAM2);
uint64_t product;
uint32_t remainder;
product = (uint64_t)op1 * op2;
if (env->macsr & MACSR_RT) {
remainder = product & 0xffffff;
product >>= 24;
if (remainder > 0x800000)
product++;
else if (remainder == 0x800000)
product += (product & 1);
} else {
product >>= 24;
}
env->mactmp = product;
FORCE_RET();
}
OP(macshl)
{
env->mactmp <<= 1;
}
OP(macshr)
{
env->mactmp >>= 1;
}
OP(macadd)
{
int acc = PARAM1;
env->macc[acc] += env->mactmp;
FORCE_RET();
}
OP(macsub)
{
int acc = PARAM1;
env->macc[acc] -= env->mactmp;
FORCE_RET();
}
OP(macsats)
{
int acc = PARAM1;
int64_t sum;
int64_t result;
sum = env->macc[acc];
result = (sum << 16) >> 16;
if (result != sum) {
env->macsr |= MACSR_V;
}
if (env->macsr & MACSR_V) {
env->macsr |= MACSR_PAV0 << acc;
if (env->macsr & MACSR_OMC) {
/* The result is saturated to 32 bits, despite overflow occuring
at 48 bits. Seems weird, but that's what the hardware docs
say. */
result = (result >> 63) ^ 0x7fffffff;
}
}
env->macc[acc] = result;
FORCE_RET();
}
OP(macsatu)
{
int acc = PARAM1;
uint64_t sum;
sum = env->macc[acc];
if (sum & (0xffffull << 48)) {
env->macsr |= MACSR_V;
}
if (env->macsr & MACSR_V) {
env->macsr |= MACSR_PAV0 << acc;
if (env->macsr & MACSR_OMC) {
if (sum > (1ull << 53))
sum = 0;
else
sum = (1ull << 48) - 1;
} else {
sum &= ((1ull << 48) - 1);
}
}
FORCE_RET();
}
OP(macsatf)
{
int acc = PARAM1;
int64_t sum;
int64_t result;
sum = env->macc[acc];
result = (sum << 16) >> 16;
if (result != sum) {
env->macsr |= MACSR_V;
}
if (env->macsr & MACSR_V) {
env->macsr |= MACSR_PAV0 << acc;
if (env->macsr & MACSR_OMC) {
result = (result >> 63) ^ 0x7fffffffffffll;
}
}
env->macc[acc] = result;
FORCE_RET();
}
OP(mac_clear_flags)
{
env->macsr &= ~(MACSR_V | MACSR_Z | MACSR_N | MACSR_EV);
}
OP(mac_set_flags)
{
int acc = PARAM1;
uint64_t val;
val = env->macc[acc];
if (val == 0)
env->macsr |= MACSR_Z;
else if (val & (1ull << 47));
env->macsr |= MACSR_N;
if (env->macsr & (MACSR_PAV0 << acc)) {
env->macsr |= MACSR_V;
}
if (env->macsr & MACSR_FI) {
val = ((int64_t)val) >> 40;
if (val != 0 && val != -1)
env->macsr |= MACSR_EV;
} else if (env->macsr & MACSR_SU) {
val = ((int64_t)val) >> 32;
if (val != 0 && val != -1)
env->macsr |= MACSR_EV;
} else {
if ((val >> 32) != 0)
env->macsr |= MACSR_EV;
}
FORCE_RET();
}
OP(get_macf)
{
int acc = PARAM2;
int64_t val;
int rem;
uint32_t result;
val = env->macc[acc];
if (env->macsr & MACSR_SU) {
/* 16-bit rounding. */
rem = val & 0xffffff;
val = (val >> 24) & 0xffffu;
if (rem > 0x800000)
val++;
else if (rem == 0x800000)
val += (val & 1);
} else if (env->macsr & MACSR_RT) {
/* 32-bit rounding. */
rem = val & 0xff;
val >>= 8;
if (rem > 0x80)
val++;
else if (rem == 0x80)
val += (val & 1);
} else {
/* No rounding. */
val >>= 8;
}
if (env->macsr & MACSR_OMC) {
/* Saturate. */
if (env->macsr & MACSR_SU) {
if (val != (uint16_t) val) {
result = ((val >> 63) ^ 0x7fff) & 0xffff;
} else {
result = val & 0xffff;
}
} else {
if (val != (uint32_t)val) {
result = ((uint32_t)(val >> 63) & 0x7fffffff);
} else {
result = (uint32_t)val;
}
}
} else {
/* No saturation. */
if (env->macsr & MACSR_SU) {
result = val & 0xffff;
} else {
result = (uint32_t)val;
}
}
set_op(PARAM1, result);
FORCE_RET();
}
OP(get_maci)
{
int acc = PARAM2;
set_op(PARAM1, (uint32_t)env->macc[acc]);
FORCE_RET();
}
OP(get_macs)
{
int acc = PARAM2;
int64_t val = env->macc[acc];
uint32_t result;
if (val == (int32_t)val) {
result = (int32_t)val;
} else {
result = (val >> 61) ^ 0x7fffffff;
}
set_op(PARAM1, result);
FORCE_RET();
}
OP(get_macu)
{
int acc = PARAM2;
uint64_t val = env->macc[acc];
uint32_t result;
if ((val >> 32) == 0) {
result = (uint32_t)val;
} else {
result = 0xffffffffu;
}
set_op(PARAM1, result);
FORCE_RET();
}
OP(clear_mac)
{
int acc = PARAM1;
env->macc[acc] = 0;
env->macsr &= ~(MACSR_PAV0 << acc);
FORCE_RET();
}
OP(move_mac)
{
int dest = PARAM1;
int src = PARAM2;
uint32_t mask;
env->macc[dest] = env->macc[src];
mask = MACSR_PAV0 << dest;
if (env->macsr & (MACSR_PAV0 << src))
env->macsr |= mask;
else
env->macsr &= ~mask;
FORCE_RET();
}
OP(get_mac_extf)
{
uint32_t val;
int acc = PARAM2;
val = env->macc[acc] & 0x00ff;
val = (env->macc[acc] >> 32) & 0xff00;
val |= (env->macc[acc + 1] << 16) & 0x00ff0000;
val |= (env->macc[acc + 1] >> 16) & 0xff000000;
set_op(PARAM1, val);
FORCE_RET();
}
OP(get_mac_exti)
{
uint32_t val;
int acc = PARAM2;
val = (env->macc[acc] >> 32) & 0xffff;
val |= (env->macc[acc + 1] >> 16) & 0xffff0000;
set_op(PARAM1, val);
FORCE_RET();
}
OP(set_macf)
{
int acc = PARAM2;
int32_t val = get_op(PARAM1);
env->macc[acc] = ((int64_t)val) << 8;
env->macsr &= ~(MACSR_PAV0 << acc);
FORCE_RET();
}
OP(set_macs)
{
int acc = PARAM2;
int32_t val = get_op(PARAM1);
env->macc[acc] = val;
env->macsr &= ~(MACSR_PAV0 << acc);
FORCE_RET();
}
OP(set_macu)
{
int acc = PARAM2;
uint32_t val = get_op(PARAM1);
env->macc[acc] = val;
env->macsr &= ~(MACSR_PAV0 << acc);
FORCE_RET();
}
OP(set_mac_extf)
{
int acc = PARAM2;
int32_t val = get_op(PARAM1);
int64_t res;
int32_t tmp;
res = env->macc[acc] & 0xffffffff00ull;
tmp = (int16_t)(val & 0xff00);
res |= ((int64_t)tmp) << 32;
res |= val & 0xff;
env->macc[acc] = res;
res = env->macc[acc + 1] & 0xffffffff00ull;
tmp = (val & 0xff000000);
res |= ((int64_t)tmp) << 16;
res |= (val >> 16) & 0xff;
env->macc[acc + 1] = res;
}
OP(set_mac_exts)
{
int acc = PARAM2;
int32_t val = get_op(PARAM1);
int64_t res;
int32_t tmp;
res = (uint32_t)env->macc[acc];
tmp = (int16_t)val;
res |= ((int64_t)tmp) << 32;
env->macc[acc] = res;
res = (uint32_t)env->macc[acc + 1];
tmp = val & 0xffff0000;
res |= (int64_t)tmp << 16;
env->macc[acc + 1] = res;
}
OP(set_mac_extu)
{
int acc = PARAM2;
int32_t val = get_op(PARAM1);
uint64_t res;
res = (uint32_t)env->macc[acc];
res |= ((uint64_t)(val & 0xffff)) << 32;
env->macc[acc] = res;
res = (uint32_t)env->macc[acc + 1];
res |= (uint64_t)(val & 0xffff0000) << 16;
env->macc[acc + 1] = res;
}
OP(set_macsr)
{
m68k_set_macsr(env, get_op(PARAM1));
}

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@ -33,3 +33,5 @@ DEFO32(CC_X, cc_x)
DEFO32(DIV1, div1)
DEFO32(DIV2, div2)
DEFO32(EXCEPTION, exception_index)
DEFO32(MACSR, macsr)
DEFO32(MAC_MASK, mac_mask)

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@ -2433,6 +2433,279 @@ DISAS_INSN(fsave)
qemu_assert(0, "FSAVE not implemented");
}
static inline int gen_mac_extract_word(DisasContext *s, int val, int upper)
{
int tmp = gen_new_qreg(QMODE_I32);
if (s->env->macsr & MACSR_FI) {
if (upper)
gen_op_and32(tmp, val, gen_im32(0xffff0000));
else
gen_op_shl32(tmp, val, gen_im32(16));
} else if (s->env->macsr & MACSR_SU) {
if (upper)
gen_op_sar32(tmp, val, gen_im32(16));
else
gen_op_ext16s32(tmp, val);
} else {
if (upper)
gen_op_shr32(tmp, val, gen_im32(16));
else
gen_op_ext16u32(tmp, val);
}
return tmp;
}
DISAS_INSN(mac)
{
int rx;
int ry;
uint16_t ext;
int acc;
int l1;
int tmp;
int addr;
int loadval;
int dual;
int saved_flags = -1;
ext = lduw_code(s->pc);
s->pc += 2;
acc = ((insn >> 7) & 1) | ((ext >> 3) & 2);
dual = ((insn & 0x30) != 0 && (ext & 3) != 0);
if (insn & 0x30) {
/* MAC with load. */
tmp = gen_lea(s, insn, OS_LONG);
addr = gen_new_qreg(QMODE_I32);
gen_op_and32(addr, tmp, QREG_MAC_MASK);
/* Load the value now to ensure correct exception behavior.
Perform writeback after reading the MAC inputs. */
loadval = gen_load(s, OS_LONG, addr, 0);
acc ^= 1;
rx = (ext & 0x8000) ? AREG(ext, 12) : DREG(insn, 12);
ry = (ext & 8) ? AREG(ext, 0) : DREG(ext, 0);
} else {
loadval = addr = -1;
rx = (insn & 0x40) ? AREG(insn, 9) : DREG(insn, 9);
ry = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0);
}
gen_op_mac_clear_flags();
l1 = -1;
if ((s->env->macsr & MACSR_OMC) != 0 && !dual) {
/* Skip the multiply if we know we will ignore it. */
l1 = gen_new_label();
tmp = gen_new_qreg(QMODE_I32);
gen_op_and32(tmp, QREG_MACSR, gen_im32(1 << (acc + 8)));
gen_op_jmp_nz32(tmp, l1);
}
if ((ext & 0x0800) == 0) {
/* Word. */
rx = gen_mac_extract_word(s, rx, (ext & 0x80) != 0);
ry = gen_mac_extract_word(s, ry, (ext & 0x40) != 0);
}
if (s->env->macsr & MACSR_FI) {
gen_op_macmulf(rx, ry);
} else {
if (s->env->macsr & MACSR_SU)
gen_op_macmuls(rx, ry);
else
gen_op_macmulu(rx, ry);
switch ((ext >> 9) & 3) {
case 1:
gen_op_macshl();
break;
case 3:
gen_op_macshr();
break;
}
}
if (dual) {
/* Save the overflow flag from the multiply. */
saved_flags = gen_new_qreg(QMODE_I32);
gen_op_mov32(saved_flags, QREG_MACSR);
}
if ((s->env->macsr & MACSR_OMC) != 0 && dual) {
/* Skip the accumulate if the value is already saturated. */
l1 = gen_new_label();
tmp = gen_new_qreg(QMODE_I32);
gen_op_and32(tmp, QREG_MACSR, gen_im32(MACSR_PAV0 << acc));
gen_op_jmp_nz32(tmp, l1);
}
if (insn & 0x100)
gen_op_macsub(acc);
else
gen_op_macadd(acc);
if (s->env->macsr & MACSR_FI)
gen_op_macsatf(acc);
else if (s->env->macsr & MACSR_SU)
gen_op_macsats(acc);
else
gen_op_macsatu(acc);
if (l1 != -1)
gen_set_label(l1);
if (dual) {
/* Dual accumulate variant. */
acc = (ext >> 2) & 3;
/* Restore the overflow flag from the multiplier. */
gen_op_mov32(QREG_MACSR, saved_flags);
if ((s->env->macsr & MACSR_OMC) != 0) {
/* Skip the accumulate if the value is already saturated. */
l1 = gen_new_label();
tmp = gen_new_qreg(QMODE_I32);
gen_op_and32(tmp, QREG_MACSR, gen_im32(MACSR_PAV0 << acc));
gen_op_jmp_nz32(tmp, l1);
}
if (ext & 2)
gen_op_macsub(acc);
else
gen_op_macadd(acc);
if (s->env->macsr & MACSR_FI)
gen_op_macsatf(acc);
else if (s->env->macsr & MACSR_SU)
gen_op_macsats(acc);
else
gen_op_macsatu(acc);
if (l1 != -1)
gen_set_label(l1);
}
gen_op_mac_set_flags(acc);
if (insn & 0x30) {
int rw;
rw = (insn & 0x40) ? AREG(insn, 9) : DREG(insn, 9);
gen_op_mov32(rw, loadval);
/* FIXME: Should address writeback happen with the masked or
unmasked value? */
switch ((insn >> 3) & 7) {
case 3: /* Post-increment. */
gen_op_add32(AREG(insn, 0), addr, gen_im32(4));
break;
case 4: /* Pre-decrement. */
gen_op_mov32(AREG(insn, 0), addr);
}
}
}
DISAS_INSN(from_mac)
{
int rx;
int acc;
rx = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0);
acc = (insn >> 9) & 3;
if (s->env->macsr & MACSR_FI) {
gen_op_get_macf(rx, acc);
} else if ((s->env->macsr & MACSR_OMC) == 0) {
gen_op_get_maci(rx, acc);
} else if (s->env->macsr & MACSR_SU) {
gen_op_get_macs(rx, acc);
} else {
gen_op_get_macu(rx, acc);
}
if (insn & 0x40)
gen_op_clear_mac(acc);
}
DISAS_INSN(move_mac)
{
int src;
int dest;
src = insn & 3;
dest = (insn >> 9) & 3;
gen_op_move_mac(dest, src);
gen_op_mac_clear_flags();
gen_op_mac_set_flags(dest);
}
DISAS_INSN(from_macsr)
{
int reg;
reg = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0);
gen_op_mov32(reg, QREG_MACSR);
}
DISAS_INSN(from_mask)
{
int reg;
reg = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0);
gen_op_mov32(reg, QREG_MAC_MASK);
}
DISAS_INSN(from_mext)
{
int reg;
int acc;
reg = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0);
acc = (insn & 0x400) ? 2 : 0;
if (s->env->macsr & MACSR_FI)
gen_op_get_mac_extf(reg, acc);
else
gen_op_get_mac_exti(reg, acc);
}
DISAS_INSN(macsr_to_ccr)
{
gen_op_mov32(QREG_CC_X, gen_im32(0));
gen_op_and32(QREG_CC_DEST, QREG_MACSR, gen_im32(0xf));
s->cc_op = CC_OP_FLAGS;
}
DISAS_INSN(to_mac)
{
int acc;
int val;
acc = (insn >>9) & 3;
SRC_EA(val, OS_LONG, 0, NULL);
if (s->env->macsr & MACSR_FI) {
gen_op_set_macf(val, acc);
} else if (s->env->macsr & MACSR_SU) {
gen_op_set_macs(val, acc);
} else {
gen_op_set_macu(val, acc);
}
gen_op_mac_clear_flags();
gen_op_mac_set_flags(acc);
}
DISAS_INSN(to_macsr)
{
int val;
SRC_EA(val, OS_LONG, 0, NULL);
gen_op_set_macsr(val);
gen_lookup_tb(s);
}
DISAS_INSN(to_mask)
{
int val;
SRC_EA(val, OS_LONG, 0, NULL);
gen_op_or32(QREG_MAC_MASK, val, gen_im32(0xffff0000));
}
DISAS_INSN(to_mext)
{
int val;
int acc;
SRC_EA(val, OS_LONG, 0, NULL);
acc = (insn & 0x400) ? 2 : 0;
if (s->env->macsr & MACSR_FI)
gen_op_set_mac_extf(val, acc);
else if (s->env->macsr & MACSR_SU)
gen_op_set_mac_exts(val, acc);
else
gen_op_set_mac_extu(val, acc);
}
static disas_proc opcode_table[65536];
static void
@ -2545,7 +2818,20 @@ void register_m68k_insns (CPUM68KState *env)
INSN(addsub, 9000, f000, CF_ISA_A);
INSN(subx, 9180, f1f8, CF_ISA_A);
INSN(suba, 91c0, f1c0, CF_ISA_A);
INSN(undef_mac, a000, f000, CF_ISA_A);
INSN(mac, a000, f100, CF_EMAC);
INSN(from_mac, a180, f9b0, CF_EMAC);
INSN(move_mac, a110, f9fc, CF_EMAC);
INSN(from_macsr,a980, f9f0, CF_EMAC);
INSN(from_mask, ad80, fff0, CF_EMAC);
INSN(from_mext, ab80, fbf0, CF_EMAC);
INSN(macsr_to_ccr, a9c0, ffff, CF_EMAC);
INSN(to_mac, a100, f9c0, CF_EMAC);
INSN(to_macsr, a900, ffc0, CF_EMAC);
INSN(to_mext, ab00, fbc0, CF_EMAC);
INSN(to_mask, ad00, ffc0, CF_EMAC);
INSN(mov3q, a140, f1c0, CF_ISA_B);
INSN(cmp, b000, f1c0, CF_ISA_B); /* cmp.b */
INSN(cmp, b040, f1c0, CF_ISA_B); /* cmp.w */