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i960: implement logr and expr opcodes (for Model2 Power Sled)

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This commit is contained in:
MetalliC 2019-04-29 14:22:13 +03:00
parent b60ce1de73
commit dfeccacffc
1 changed files with 12 additions and 0 deletions
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12
src/devices/cpu/i960/i960.cpp
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@ -1530,6 +1530,12 @@ void i960_cpu_device::execute_op(uint32_t opcode)
set_rif(opcode, t2f*log(t1f+1.0)/log(2.0));
break;
case 0x2: // logr
m_icount -= 400; // checkme
t1f = get_1_rif(opcode);
set_rif(opcode, log(t1f));
break;
case 0x3: // remr
m_icount -= 67; // (67 to 75878 depending on opcodes!!!)
t1f = get_1_rif(opcode);
@ -1550,6 +1556,12 @@ void i960_cpu_device::execute_op(uint32_t opcode)
set_rif(opcode, sqrt(t1f));
break;
case 0x9: // expr
m_icount -= 334; // checkme
t1f = get_1_rif(opcode);
set_rif(opcode, pow(2.0, t1f) - 1.0);
break;
case 0xa: // logbnr
m_icount -= 37;
t1f = get_1_rif(opcode);