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i960: Preliminary support for CALLS instruction and WIP on FAULTx instructions. [R. Belmont]

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This commit is contained in:
arbee 2016-12-22 23:02:20 -05:00
parent 20a3f043dd
commit f448fa7c54
3 changed files with 62 additions and 1 deletions
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60
src/devices/cpu/i960/i960.cpp
View File

@ -368,6 +368,13 @@ void i960_cpu_device::bxx(uint32_t opcode, int mask)
}
}
void i960_cpu_device::fxx(uint32_t opcode, int mask)
{
if(m_AC & mask) {
fatalerror("Taking the fault on a FAULT insn not yet supported\n");
}
}
void i960_cpu_device::bxx_s(uint32_t opcode, int mask)
{
if(m_AC & mask) {
@ -650,6 +657,48 @@ void i960_cpu_device::execute_op(uint32_t opcode)
m_icount--;
bxx(opcode, 7);
break;
case 0x18: // faultno
m_icount--;
if(!(m_AC & 7)) {
m_IP += get_disp(opcode);
}
break;
case 0x19: // faultg
m_icount--;
fxx(opcode, 1);
break;
case 0x1a: // faulte
m_icount--;
fxx(opcode, 2);
break;
case 0x1b: // faultge
m_icount--;
fxx(opcode, 3);
break;
case 0x1c: // faultl
m_icount--;
fxx(opcode, 4);
break;
case 0x1d: // faultne
m_icount--;
fxx(opcode, 5);
break;
case 0x1e: // faultle
m_icount--;
fxx(opcode, 6);
break;
case 0x1f: // faulto
m_icount--;
fxx(opcode, 7);
break;
case 0x20: // testno
m_icount--;
@ -1328,6 +1377,17 @@ void i960_cpu_device::execute_op(uint32_t opcode)
case 0x66:
switch((opcode >> 7) & 0xf) {
case 0x0: // calls
t1 = get_1_ri(opcode);
t2 = m_program->read_dword(m_SAT + 152); // get pointer to system procedure table
t2 = m_program->read_dword(t2 + 48 + (t1 * 4));
if ((t2 & 3) != 0)
{
fatalerror("I960: system calls that jump into supervisor mode aren't yet supported\n");
}
do_call(t2, 0, m_r[I960_SP]);
break;
case 0xd: // flushreg
if (m_rcache_pos > 4)
{

1
src/devices/cpu/i960/i960.h
View File

@ -161,6 +161,7 @@ private:
void cmp_d(double v1, double v2);
void bxx(uint32_t opcode, int mask);
void bxx_s(uint32_t opcode, int mask);
void fxx(uint32_t opcode, int mask);
void test(uint32_t opcode, int mask);
void execute_op(uint32_t opcode);
void take_interrupt(int vector, int lvl);

2
src/devices/cpu/i960/i960dis.cpp
View File

@ -22,7 +22,7 @@ static const mnemonic_t mnemonic[256] = {
{ "b", 8 }, { "call", 8 }, { "ret", 9 }, { "bal", 8 }, { "?", 0 }, { "?", 0 }, { "?", 0 }, { "?", 0 },
{ "bno", 8 }, { "bg", 8 }, { "be", 8 }, { "bge", 8 }, { "bl", 8 }, { "bne", 8 }, { "ble", 8 }, { "bo", 8 }, // 10
{ "?", 0 }, { "?", 0 }, { "?", 0 }, { "?", 0 }, { "?", 0 }, { "?", 0 }, { "?", 0 }, { "?", 0 },
{ "faultno", 0 }, { "faultg", 0 }, { "faulte", 0 }, { "faultge", 0 }, { "faultl", 0 }, { "faultne", 0 }, { "faultle", 0 }, { "faulto", 0 },
{ "testno", 10 }, { "testg", 10 }, { "teste", 10 }, { "testge", 10 }, { "testl", 10 }, { "testne", 10 }, { "testle", 10 }, { "testo", 10 }, // 20
{ "?", 0 }, { "?", 0 }, { "?", 0 }, { "?", 0 }, { "?", 0 }, { "?", 0 }, { "?", 0 }, { "?", 0 },