alpha: Correct opcode mnemonics

Four corrections to typos in mnemonics in const char *opcode[] in alpha_sys.c:
_L should be _C for opcodes 2E and 2F.

Alpha simulator V4.0-0 Current git commit id: 3c1c92d
sim> ; Opcode 2E
sim> ev -m 0xB8000000
0: STL_L R0,0(R0)
4: 00000000B8000000
sim>
sim> ; Opcode 2F
sim> ev -m 0xBC000000
0: STQ_L R0,0(R0)
4: 00000000BC000000
sim>

According to, Alpha Architecture Handbook V4, October 1998, Table C2:
There are no instructions with the mnemonics STL_L or STQ_L, but there are STL_C and STQ_C.

The nmemonics are correct in https://github.com/simh/simh/blob/master/alpha/alpha_cpu.c
case OP_STL_C: /* STL_C /
case OP_STQ_C: / STQ_C */

but in https://github.com/simh/simh/blob/master/alpha/alpha_sys.c
In const char *opcode[] = { the line:

"STL", "STQ", "STL_L", "STQ_L",

has been corrected to be:

"STL", "STQ", "STL_C", "STQ_C",

=====

BF should be FB in mnemonic for Opcode 36.

Alpha simulator V4.0-0 Current git commit id: 3c1c92d
sim> ; Opcode 36
sim> ev -m 0xD8000000
0: BFGE R0,4
4: 00000000D8000000
sim>

According to, Alpha Architecture Handbook V4, October 1998, Table C2:

FBGE Bra 36 Floating branch if ≥ zero

This is correct in https://github.com/simh/simh/blob/master/alpha/alpha_cpu.c
case OP_FBGT: /* FBGT */

but in https://github.com/simh/simh/blob/master/alpha/alpha_sys.c
In const char *opcode[] = { the line

"BSR", "FBNE", "BFGE", "FBGT",

has been corrected to be...

"BSR", "FBNE", "FBGE", "FBGT",

=====

MULLQ/V should MULQ/V as the mnemonic for Opcode 13.60

sim> ; Opcode 13.60
sim> ev -m 0x4C000C00
0: MULLQ/V R0,R0,R0
4: 000000004C000C00
sim>

According to, Alpha Architecture Handbook V4, October 1998, Table C2:

MULQ/V Opr 13.60 Multiply quadword

This is correct in https://github.com/simh/simh/blob/master/alpha/alpha_cpu.c
case 0x60: /* MULQ/V */

but in https://github.com/simh/simh/blob/master/alpha/alpha_sys.c
In const char *opcode[] = { the line

"MULL/V", "MULLQ/V",

has been corrected to be:

"MULL/V", "MULQ/V",

alpha/alpha_sys.c

@@ -204,7 +204,7 @@ const char *opcode[] = {
  "MSKLH", "INSLH", "EXTLH",
  "MSKQH", "INSQH", "EXTQH",
  "MULL", "MULQ", "UMULH",
- "MULL/V", "MULLQ/V",
+ "MULL/V", "MULQ/V",
  "ITOFS", "ITOFF", "ITOFT",
  "SQRTF/C", "SQRTF", "SQRTF/UC", "SQRTF/U",
  "SQRTF/SC", "SQRTF/S", "SQRTF/SUC", "SQRTF/SU",
@@ -309,9 +309,9 @@ const char *opcode[] = {
  "LDF", "LDG", "LDS", "LDT",
  "STS", "STG", "STS", "STT",
  "LDL", "LDQ", "LDL_L", "LDQ_L",
- "STL", "STQ", "STL_L", "STQ_L",
+ "STL", "STQ", "STL_C", "STQ_C",
  "BR", "FBEQ", "FBLT", "FBLE",
- "BSR", "FBNE", "BFGE", "FBGT",
+ "BSR", "FBNE", "FBGE", "FBGT",
  "BLBC", "BEQ", "BLT", "BLE",
  "BLBS", "BNE", "BGE", "BGT",
  NULL