[9fans] acid fpr()

[erik quanstrom <quanstro@coraid.com>]

after updating libmach and acid (and double-checking header files
in /sys/include and /386/include), i still get odd results from acid
on mutiple intel machines.

is there something else that needs updating?

- erik

using
	void
	main(void)
	{
		double x;

		x = atof("3.5");
		x += 3.14;
		exits(0);
	}

i get:

acid: new()
165488: system call	_main	SUBL	$0x48,SP
165488: breakpoint	main+0x3	MOVL	$.string(SB),AX
acid: bpset(main+16)
acid: cont()
165488: breakpoint	main+0x10	FMOVDP	F0,x+0x14(SP)
acid: fpr()
F0	 0.
F1	 0.
F2	 0.
F3	 0.
F4	 0.
F5	 0.
F6	 0.
F7	 0.
control	0x0272
status	0x3900
tag	0x3fff
ip offset	0x0000175d
cs selector	0x0023
opcode	0xe907
data operand offset	0xeee8
operand selector	0x001b
acid: step()
165488: breakpoint	main+0x14	FMOVD	x+0x14(SP),F0
acid: step()
165488: breakpoint	main+0x18	FADDD	$51eb851f.40091eb8(SB),F0
acid: step()
165488: breakpoint	main+0x1e	FMOVDP	F0,x+0x14(SP)
acid: fpr()
F0	-3.37649908e-11
F1	 0.
F2	 0.
F3	 0.
F4	 0.
F5	 0.
F6	 0.
F7	 0.
control	0x0272
status	0x3b20
tag	0x3fff
ip offset	0x00001038
cs selector	0x0023
opcode	0xe907
data operand offset	0x6044
operand selector	0x001b