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Diffstat (limited to 'src/emu/cpu/arcompact/arcompactdasm_ops.c')
-rw-r--r--src/emu/cpu/arcompact/arcompactdasm_ops.c90
1 files changed, 78 insertions, 12 deletions
diff --git a/src/emu/cpu/arcompact/arcompactdasm_ops.c b/src/emu/cpu/arcompact/arcompactdasm_ops.c
index 2d5adea704a..6c4c0ce2f9a 100644
--- a/src/emu/cpu/arcompact/arcompactdasm_ops.c
+++ b/src/emu/cpu/arcompact/arcompactdasm_ops.c
@@ -212,6 +212,15 @@ static const char *regnames[0x40] =
int B_temp = (op & 0x00007000) >> 12; op &= ~0x00007000; \
int breg = b_temp | (B_temp << 3); \
+#define COMMON32_GET_s12 \
+ int S_temp = (op & 0x0000003f) >> 0; op &= ~0x0000003f; \
+ int s_temp = (op & 0x00000fc0) >> 6; op &= ~0x00000fc0; \
+ int S = s_temp | (S_temp<<6); \
+
+#define COMMON32_GET_CONDITION \
+ UINT8 condition = op & 0x0000001f; op &= ~0x0000001f;
+
+
#define COMMON16_GET_breg \
breg = ((op & 0x0700) >>8); \
op &= ~0x0700; \
@@ -272,7 +281,7 @@ int arcompact_handle00_00_dasm(DASM_OPS_32)
address |= ((op & 0x0000ffc0) >> 6) << 10;
if (address & 0x800000) address = -0x800000 + (address & 0x7fffff);
int n = (op & 0x00000020) >> 5; op &= ~0x00000020;
- UINT8 condition = op & 0x0000001f;
+ COMMON32_GET_CONDITION
output += sprintf( output, "B%s(%s) %08x", delaybit[n], conditions[condition], PC_ALIGNED32 + (address * 2));
return size;
@@ -307,7 +316,7 @@ int arcompact_handle01_00_00dasm(DASM_OPS_32)
if (address & 0x800000) address = -0x800000 + (address&0x7fffff);
int n = (op & 0x00000020) >> 5; op &= ~0x00000020;
- UINT8 condition = op & 0x0000001f;
+ COMMON32_GET_CONDITION
output += sprintf( output, "BL%s(%s) %08x", delaybit[n], conditions[condition], PC_ALIGNED32 + (address *2) );
return size;
@@ -629,18 +638,18 @@ int arcompact_handle04_helper_dasm(DASM_OPS_32, const char* optext, int ignore_d
}
else if (p == 2)
{
- int S = (op & 0x00000fff) >> 0; op &= ~0x00000fff;
+ COMMON32_GET_s12;
+
output += sprintf( output, "S(%02x)", S);
}
else if (p == 3)
{
int M = (op & 0x00000020) >> 5; op &= ~0x00000020;
- int Q = (op & 0x0000001f) >> 0; op &= ~0x0000001f;
-
+ COMMON32_GET_CONDITION
output += sprintf( output, " M(%d)", M);
- output += sprintf( output, " Cond<%s> ", conditions[Q]);
+ output += sprintf( output, " Cond<%s> ", conditions[condition]);
if (M == 0)
{
@@ -851,7 +860,44 @@ int arcompact_handle04_23_dasm(DASM_OPS_32)
-int arcompact_handle04_28_dasm(DASM_OPS_32) { print("LPcc (%08x)", op); return 4;}
+int arcompact_handle04_28_dasm(DASM_OPS_32) // LPcc (loop setup)
+{
+ COMMON32_GET_breg; // breg is reserved
+ int p = (op & 0x00c00000) >> 22; op &= ~0x00c00000;
+
+ if (p == 0x00)
+ {
+ print("<illegal LPcc, p = 0x00)");
+ }
+ else if (p == 0x01)
+ {
+ print("<illegal LPcc, p = 0x01)");
+ }
+ else if (p == 0x02) // Loop unconditional
+ { // 0010 0RRR 1010 1000 0RRR ssss ssSS SSSS
+ COMMON32_GET_s12
+ if (S & 0x800) S = -0x800 + (S&0x7ff);
+
+ output += sprintf(output, "LP (start %08x, end %08x)", pc + 4, pc + S*2);
+ }
+ else if (p == 0x03) // Loop conditional
+ { // 0010 0RRR 1110 1000 0RRR uuuu uu1Q QQQQ
+ int u = (op & 0x00000fc0)>>6;
+ COMMON32_GET_CONDITION
+ output += sprintf(output, "LP<%s> (start %08x, end %08x)", conditions[condition], pc + 4, pc + u*2);
+
+ int unused = (op & 0x00000020)>>5;
+ if (unused==0) output += sprintf(output, "(unused bit not set)");
+
+ }
+
+ if (breg) output += sprintf(output, "(reseved B bits set %02x)", breg);
+
+ return 4;
+}
+
+
+
int arcompact_handle04_29_dasm(DASM_OPS_32) { print("FLAG (%08x)", op); return 4;}
int arcompact_handle04_2a_dasm(DASM_OPS_32) { print("LR (%08x)", op); return 4;}
int arcompact_handle04_2b_dasm(DASM_OPS_32) { print("SR (%08x)", op); return 4;}
@@ -871,9 +917,15 @@ int arcompact_handle04_2f_helper_dasm(DASM_OPS_32, const char* optext)
output += sprintf( output, "%s", flagbit[F]);
// output += sprintf( output, " p(%d)", p);
-
- output += sprintf(output, " %s, ", regnames[breg]);
-
+ if (breg == LIMM_REG)
+ {
+ output += sprintf(output, " <no dst>, ");
+ // if using the 'EX' opcode this is illegal
+ }
+ else
+ {
+ output += sprintf(output, " %s, ", regnames[breg]);
+ }
if (p == 0)
{
@@ -943,7 +995,7 @@ int arcompact_handle04_2f_3f_05_dasm(DASM_OPS_32) { print("BRK (%08x)", op); re
int arcompact_handle04_3x_helper_dasm(DASM_OPS_32, int dsize, int extend)
{
int size = 4;
- UINT32 limm;
+ UINT32 limm=0;
int got_limm = 0;
output += sprintf(output, "LD");
@@ -1341,7 +1393,21 @@ int arcompact_handle0f_1d_dasm(DASM_OPS_16) { return arcompact_handle0f_0x_help
int arcompact_handle0f_0c_dasm(DASM_OPS_16) { print("MUL64_S mulres <- b * c (%08x)", op); return 2;} // special
int arcompact_handle0f_1e_dasm(DASM_OPS_16) { print("TRAP_S (%08x)", op); return 2;} // special
-int arcompact_handle0f_1f_dasm(DASM_OPS_16) { print("BRK_S (%08x)", op); return 2;} // special
+
+int arcompact_handle0f_1f_dasm(DASM_OPS_16) // special
+{
+ int bc = (op & 0x07e0)>>5; op &= ~0x07e0;
+
+ if (bc == 0x003f)
+ {
+ print("BRK_S");
+ }
+ else
+ {
+ print("<illegal BRK_S>");
+ }
+ return 2;
+}
int arcompact_handle_ld_helper_dasm(DASM_OPS_16, const char* optext, int shift, int swap)