(inline assembly in C) Assembler messages: Error: unknown pseudo-op:

Question

I have written a short C \"wrapper\" function for an asm inline assembly, as below. The assembly code consists of a while loop, computing several vector dot product

Answer 1

Because your .while is not defined as a label, it's being seen as a [non-existent] pseudo-op.

Change:

".while%=\n\t"

Into:

".while%=:\n\t"

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UPDATE:

Per your request.

A "pseudo-op" is [terminology for] an assember directive that doesn't correspond to an instruction.

Some examples:

.globl main to specify that the main label is a global variable.

.text to specify that what follows should be placed in the "text" segment (likewise for .data).

The . prefix is [generally] reserved for pseudo ops. That's why you got the Error: unknown pseudo-op: message.

If you had done "while%=\n\t" instead [still wrong because there was no : to denote a label], you would have gotten a different message: Error: no such instruction: