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-rw-r--r--linux-user/main.c7
-rw-r--r--target/m68k/cpu.h4
-rw-r--r--target/m68k/helper.h8
-rw-r--r--target/m68k/op_helper.c183
-rw-r--r--target/m68k/qregs.def2
-rw-r--r--target/m68k/translate.c84
6 files changed, 218 insertions, 70 deletions
diff --git a/linux-user/main.c b/linux-user/main.c
index 75b199f274..c1d5eb4d6f 100644
--- a/linux-user/main.c
+++ b/linux-user/main.c
@@ -2864,6 +2864,13 @@ void cpu_loop(CPUM68KState *env)
info._sifields._sigfault._addr = env->pc;
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
break;
+ case EXCP_DIV0:
+ info.si_signo = TARGET_SIGFPE;
+ info.si_errno = 0;
+ info.si_code = TARGET_FPE_INTDIV;
+ info._sifields._sigfault._addr = env->pc;
+ queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
+ break;
case EXCP_TRAP0:
{
abi_long ret;
diff --git a/target/m68k/cpu.h b/target/m68k/cpu.h
index 6dfb54eb70..0b4ed7b8a6 100644
--- a/target/m68k/cpu.h
+++ b/target/m68k/cpu.h
@@ -95,10 +95,6 @@ typedef struct CPUM68KState {
uint32_t macsr;
uint32_t mac_mask;
- /* Temporary storage for DIV helpers. */
- uint32_t div1;
- uint32_t div2;
-
/* MMU status. */
struct {
uint32_t ar;
diff --git a/target/m68k/helper.h b/target/m68k/helper.h
index 2697e32d0b..6180dc5643 100644
--- a/target/m68k/helper.h
+++ b/target/m68k/helper.h
@@ -1,8 +1,12 @@
DEF_HELPER_1(bitrev, i32, i32)
DEF_HELPER_1(ff1, i32, i32)
DEF_HELPER_FLAGS_2(sats, TCG_CALL_NO_RWG_SE, i32, i32, i32)
-DEF_HELPER_2(divu, void, env, i32)
-DEF_HELPER_2(divs, void, env, i32)
+DEF_HELPER_3(divuw, void, env, int, i32)
+DEF_HELPER_3(divsw, void, env, int, s32)
+DEF_HELPER_4(divul, void, env, int, int, i32)
+DEF_HELPER_4(divsl, void, env, int, int, s32)
+DEF_HELPER_4(divull, void, env, int, int, i32)
+DEF_HELPER_4(divsll, void, env, int, int, s32)
DEF_HELPER_3(shl_cc, i32, env, i32, i32)
DEF_HELPER_3(shr_cc, i32, env, i32, i32)
DEF_HELPER_3(sar_cc, i32, env, i32, i32)
diff --git a/target/m68k/op_helper.c b/target/m68k/op_helper.c
index 48e02e4062..04246a92b4 100644
--- a/target/m68k/op_helper.c
+++ b/target/m68k/op_helper.c
@@ -166,12 +166,17 @@ bool m68k_cpu_exec_interrupt(CPUState *cs, int interrupt_request)
return false;
}
-static void raise_exception(CPUM68KState *env, int tt)
+static void raise_exception_ra(CPUM68KState *env, int tt, uintptr_t raddr)
{
CPUState *cs = CPU(m68k_env_get_cpu(env));
cs->exception_index = tt;
- cpu_loop_exit(cs);
+ cpu_loop_exit_restore(cs, raddr);
+}
+
+static void raise_exception(CPUM68KState *env, int tt)
+{
+ raise_exception_ra(env, tt, 0);
}
void HELPER(raise_exception)(CPUM68KState *env, uint32_t tt)
@@ -179,51 +184,179 @@ void HELPER(raise_exception)(CPUM68KState *env, uint32_t tt)
raise_exception(env, tt);
}
-void HELPER(divu)(CPUM68KState *env, uint32_t word)
+void HELPER(divuw)(CPUM68KState *env, int destr, uint32_t den)
{
- uint32_t num;
- uint32_t den;
- uint32_t quot;
- uint32_t rem;
+ uint32_t num = env->dregs[destr];
+ uint32_t quot, rem;
+
+ if (den == 0) {
+ raise_exception_ra(env, EXCP_DIV0, GETPC());
+ }
+ quot = num / den;
+ rem = num % den;
+
+ env->cc_c = 0; /* always cleared, even if overflow */
+ if (quot > 0xffff) {
+ env->cc_v = -1;
+ /* real 68040 keeps N and unset Z on overflow,
+ * whereas documentation says "undefined"
+ */
+ env->cc_z = 1;
+ return;
+ }
+ env->dregs[destr] = deposit32(quot, 16, 16, rem);
+ env->cc_z = (int16_t)quot;
+ env->cc_n = (int16_t)quot;
+ env->cc_v = 0;
+}
+
+void HELPER(divsw)(CPUM68KState *env, int destr, int32_t den)
+{
+ int32_t num = env->dregs[destr];
+ uint32_t quot, rem;
- num = env->div1;
- den = env->div2;
- /* ??? This needs to make sure the throwing location is accurate. */
if (den == 0) {
- raise_exception(env, EXCP_DIV0);
+ raise_exception_ra(env, EXCP_DIV0, GETPC());
}
quot = num / den;
rem = num % den;
- env->cc_v = (word && quot > 0xffff ? -1 : 0);
+ env->cc_c = 0; /* always cleared, even if overflow */
+ if (quot != (int16_t)quot) {
+ env->cc_v = -1;
+ /* nothing else is modified */
+ /* real 68040 keeps N and unset Z on overflow,
+ * whereas documentation says "undefined"
+ */
+ env->cc_z = 1;
+ return;
+ }
+ env->dregs[destr] = deposit32(quot, 16, 16, rem);
+ env->cc_z = (int16_t)quot;
+ env->cc_n = (int16_t)quot;
+ env->cc_v = 0;
+}
+
+void HELPER(divul)(CPUM68KState *env, int numr, int regr, uint32_t den)
+{
+ uint32_t num = env->dregs[numr];
+ uint32_t quot, rem;
+
+ if (den == 0) {
+ raise_exception_ra(env, EXCP_DIV0, GETPC());
+ }
+ quot = num / den;
+ rem = num % den;
+
+ env->cc_c = 0;
env->cc_z = quot;
env->cc_n = quot;
+ env->cc_v = 0;
+
+ if (m68k_feature(env, M68K_FEATURE_CF_ISA_A)) {
+ if (numr == regr) {
+ env->dregs[numr] = quot;
+ } else {
+ env->dregs[regr] = rem;
+ }
+ } else {
+ env->dregs[regr] = rem;
+ env->dregs[numr] = quot;
+ }
+}
+
+void HELPER(divsl)(CPUM68KState *env, int numr, int regr, int32_t den)
+{
+ int32_t num = env->dregs[numr];
+ int32_t quot, rem;
+
+ if (den == 0) {
+ raise_exception_ra(env, EXCP_DIV0, GETPC());
+ }
+ quot = num / den;
+ rem = num % den;
+
env->cc_c = 0;
+ env->cc_z = quot;
+ env->cc_n = quot;
+ env->cc_v = 0;
+
+ if (m68k_feature(env, M68K_FEATURE_CF_ISA_A)) {
+ if (numr == regr) {
+ env->dregs[numr] = quot;
+ } else {
+ env->dregs[regr] = rem;
+ }
+ } else {
+ env->dregs[regr] = rem;
+ env->dregs[numr] = quot;
+ }
+}
+
+void HELPER(divull)(CPUM68KState *env, int numr, int regr, uint32_t den)
+{
+ uint64_t num = deposit64(env->dregs[numr], 32, 32, env->dregs[regr]);
+ uint64_t quot;
+ uint32_t rem;
+
+ if (den == 0) {
+ raise_exception_ra(env, EXCP_DIV0, GETPC());
+ }
+ quot = num / den;
+ rem = num % den;
- env->div1 = quot;
- env->div2 = rem;
+ env->cc_c = 0; /* always cleared, even if overflow */
+ if (quot > 0xffffffffULL) {
+ env->cc_v = -1;
+ /* real 68040 keeps N and unset Z on overflow,
+ * whereas documentation says "undefined"
+ */
+ env->cc_z = 1;
+ return;
+ }
+ env->cc_z = quot;
+ env->cc_n = quot;
+ env->cc_v = 0;
+
+ /*
+ * If Dq and Dr are the same, the quotient is returned.
+ * therefore we set Dq last.
+ */
+
+ env->dregs[regr] = rem;
+ env->dregs[numr] = quot;
}
-void HELPER(divs)(CPUM68KState *env, uint32_t word)
+void HELPER(divsll)(CPUM68KState *env, int numr, int regr, int32_t den)
{
- int32_t num;
- int32_t den;
- int32_t quot;
+ int64_t num = deposit64(env->dregs[numr], 32, 32, env->dregs[regr]);
+ int64_t quot;
int32_t rem;
- num = env->div1;
- den = env->div2;
if (den == 0) {
- raise_exception(env, EXCP_DIV0);
+ raise_exception_ra(env, EXCP_DIV0, GETPC());
}
quot = num / den;
rem = num % den;
- env->cc_v = (word && quot != (int16_t)quot ? -1 : 0);
+ env->cc_c = 0; /* always cleared, even if overflow */
+ if (quot != (int32_t)quot) {
+ env->cc_v = -1;
+ /* real 68040 keeps N and unset Z on overflow,
+ * whereas documentation says "undefined"
+ */
+ env->cc_z = 1;
+ return;
+ }
env->cc_z = quot;
env->cc_n = quot;
- env->cc_c = 0;
+ env->cc_v = 0;
+
+ /*
+ * If Dq and Dr are the same, the quotient is returned.
+ * therefore we set Dq last.
+ */
- env->div1 = quot;
- env->div2 = rem;
+ env->dregs[regr] = rem;
+ env->dregs[numr] = quot;
}
diff --git a/target/m68k/qregs.def b/target/m68k/qregs.def
index 156c0f558f..51ff43bf33 100644
--- a/target/m68k/qregs.def
+++ b/target/m68k/qregs.def
@@ -7,7 +7,5 @@ DEFO32(CC_C, cc_c)
DEFO32(CC_N, cc_n)
DEFO32(CC_V, cc_v)
DEFO32(CC_Z, cc_z)
-DEFO32(DIV1, div1)
-DEFO32(DIV2, div2)
DEFO32(MACSR, macsr)
DEFO32(MAC_MASK, mac_mask)
diff --git a/target/m68k/translate.c b/target/m68k/translate.c
index 6678b57b97..737009e0b5 100644
--- a/target/m68k/translate.c
+++ b/target/m68k/translate.c
@@ -1242,64 +1242,74 @@ DISAS_INSN(mulw)
DISAS_INSN(divw)
{
- TCGv reg;
- TCGv tmp;
- TCGv src;
int sign;
+ TCGv src;
+ TCGv destr;
+
+ /* divX.w <EA>,Dn 32/16 -> 16r:16q */
sign = (insn & 0x100) != 0;
- reg = DREG(insn, 9);
- if (sign) {
- tcg_gen_ext16s_i32(QREG_DIV1, reg);
- } else {
- tcg_gen_ext16u_i32(QREG_DIV1, reg);
- }
+
+ /* dest.l / src.w */
+
SRC_EA(env, src, OS_WORD, sign, NULL);
- tcg_gen_mov_i32(QREG_DIV2, src);
+ destr = tcg_const_i32(REG(insn, 9));
if (sign) {
- gen_helper_divs(cpu_env, tcg_const_i32(1));
+ gen_helper_divsw(cpu_env, destr, src);
} else {
- gen_helper_divu(cpu_env, tcg_const_i32(1));
+ gen_helper_divuw(cpu_env, destr, src);
}
-
- tmp = tcg_temp_new();
- src = tcg_temp_new();
- tcg_gen_ext16u_i32(tmp, QREG_DIV1);
- tcg_gen_shli_i32(src, QREG_DIV2, 16);
- tcg_gen_or_i32(reg, tmp, src);
+ tcg_temp_free(destr);
set_cc_op(s, CC_OP_FLAGS);
}
DISAS_INSN(divl)
{
- TCGv num;
- TCGv den;
- TCGv reg;
+ TCGv num, reg, den;
+ int sign;
uint16_t ext;
ext = read_im16(env, s);
- if (ext & 0x87f8) {
- gen_exception(s, s->pc - 4, EXCP_UNSUPPORTED);
+
+ sign = (ext & 0x0800) != 0;
+
+ if (ext & 0x400) {
+ if (!m68k_feature(s->env, M68K_FEATURE_QUAD_MULDIV)) {
+ gen_exception(s, s->insn_pc, EXCP_ILLEGAL);
+ return;
+ }
+
+ /* divX.l <EA>, Dr:Dq 64/32 -> 32r:32q */
+
+ SRC_EA(env, den, OS_LONG, 0, NULL);
+ num = tcg_const_i32(REG(ext, 12));
+ reg = tcg_const_i32(REG(ext, 0));
+ if (sign) {
+ gen_helper_divsll(cpu_env, num, reg, den);
+ } else {
+ gen_helper_divull(cpu_env, num, reg, den);
+ }
+ tcg_temp_free(reg);
+ tcg_temp_free(num);
+ set_cc_op(s, CC_OP_FLAGS);
return;
}
- num = DREG(ext, 12);
- reg = DREG(ext, 0);
- tcg_gen_mov_i32(QREG_DIV1, num);
+
+ /* divX.l <EA>, Dq 32/32 -> 32q */
+ /* divXl.l <EA>, Dr:Dq 32/32 -> 32r:32q */
+
SRC_EA(env, den, OS_LONG, 0, NULL);
- tcg_gen_mov_i32(QREG_DIV2, den);
- if (ext & 0x0800) {
- gen_helper_divs(cpu_env, tcg_const_i32(0));
- } else {
- gen_helper_divu(cpu_env, tcg_const_i32(0));
- }
- if ((ext & 7) == ((ext >> 12) & 7)) {
- /* div */
- tcg_gen_mov_i32 (reg, QREG_DIV1);
+ num = tcg_const_i32(REG(ext, 12));
+ reg = tcg_const_i32(REG(ext, 0));
+ if (sign) {
+ gen_helper_divsl(cpu_env, num, reg, den);
} else {
- /* rem */
- tcg_gen_mov_i32 (reg, QREG_DIV2);
+ gen_helper_divul(cpu_env, num, reg, den);
}
+ tcg_temp_free(reg);
+ tcg_temp_free(num);
+
set_cc_op(s, CC_OP_FLAGS);
}
generated by cgit v1.2.3 (git 2.26.2) at 2024-11-28 11:29:07 +0000