Title [lDebug] NASM of 2025-10-06 fails to assemble fptostr.asm, "error: invalid combination of opcode and operands"
AuthorE. C. Masloch
Created2026-06-06 16:30:35 +0200 Jun Sat
State closed

The "error: invalid combination of opcode and operands" is produced when trying to assemble the following instruction:

    fmulp st1, st0

This is with NASM git 755593b of 2025-10-06.

E. C. Masloch on 2026-06-06 17:07:54 +0200 Jun Sat

Fixed by hg 100d41d5314c on 2026-03-20. Refer to https://github.com/netwide-assembler/nasm/issues/206#issuecomment-4101099270