[mips sim]: Fix check for negative dmult operands

[cgd@broadcom.com]

At Sun, 15 Jun 2003 17:04:28 +0000 (UTC), "Andrew Cagney" wrote:
> Yes, just add a comment reminding the reader that op1 is already 64 bits.

op1 and op2 and defined approximately 10 lines above as:

  unsigned64 op1 = GPR[rs];
  unsigned64 op2 = GPR[rt];

so IMO their 64-bitness is fairly clear already.


cgd