curly braces in generated asm code

Felix M.

I want to parse assembler code. There are "{" appearing in the generated code by C compiler like:

CMP.W	20(R1), R12 { JGE	.L3

Shouldn't be this two lines?!

test1.s was created with gcc -S test1.c

test1.s

Fullscreen test1.c Download

#define MAX 10

int main() {
	int a[MAX];
	int index;
	for (index = 0; index < MAX; index++) {
		a[index] = index*index;
	}
	return 0;
}

over 10 years ago

0 Nick Clifton over 10 years ago

Intellectual 390 points

Hi Felix,

The { character is a "line separator" for MSP430 assembler. So in effect you are actually looking at two lines.

GCC could have emitted the code as two physical lines instead, it just made things a little bit easier (for the compiler writers) to have one single line instead.

Cheers
Nick

0 Felix M. over 10 years ago in reply to Nick Clifton

Intellectual 290 points

ok. Is this documented anywhere? I didn't found it.

0 Nick Clifton over 10 years ago in reply to Felix M.

Intellectual 390 points

Hi Felix,

I cannot speak to the documentation provided by T.I. but it is documented in the FSF Binutils sources. For example see:

sourceware.org/.../MSP430_002dChars.html

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curly braces in generated asm code