Lines Matching +full:ls +full:- +full:bits

1 /* SPDX-License-Identifier: GPL-2.0 */
3 /*---------------------------------------------------------------------------+
10  |                       Australia.  E-mail billm@suburbia.net               |
20  |    Return value is the tag of the answer, or-ed with FPU_Exception if     |
21  |    one was raised, or -1 on internal error.                               |
26  +---------------------------------------------------------------------------*/
28 /*---------------------------------------------------------------------------+
47  |   must be non-zero.                                                       |
48  |   If the significand extension is non-zero then the significand is        |
50  |   greater than zero and less than one ls bit of the significand.          |
52  |   non-zero values:                                                        |
53  |       less than 0x80000000  <=> the significand is less than 1/2 an ls    |
56  |         exactly 0x80000000  <=> the significand is exactly 1/2 an ls bit  |
59  |    greater than 0x80000000  <=> the significand is more than 1/2 an ls    |
63  +---------------------------------------------------------------------------*/
65 /*---------------------------------------------------------------------------+
73  +---------------------------------------------------------------------------*/
90 /*	Make the code re-entrant by putting
96 /*	Not re-entrant, so we can gain speed by putting
138 	jle	L_Make_denorm			/* The number is a de-normal */
140 	movb	$0,FPU_denormal			/* 0 -> not a de-normal */
143 	movb	$0,FPU_bits_lost		/* No bits yet lost in rounding */
157 /* With the precision control bits set to 01 "(reserved)", a real 80486
158    behaves as if the precision control bits were set to 11 "64 bits" */
184 	cmpl	RC_DOWN,%ecx		/* Towards -infinity */
218 	/* Possibly half, we need to check the ls bits */
231 	andl	$0xffffff00,%eax	/* Truncate to 24 bits */
245 	andl	$0xffffff00,%eax	/* Truncate to 24 bits */
264 	cmpl	RC_DOWN,%ecx		/* Towards -infinity */
297 	/* Possibly half, we need to check the ls bits */
308 	andl	$0xfffff800,%ebx	/* Truncate to 53 bits */
321 	andl	$0xfffff800,%ebx	/* Truncate to 53 bits */
338 	cmpl	RC_DOWN,%ecx		/* Towards -infinity */
367 	/* Now test for round-to-even */
445  * round-up.
470  * Shift the number right the required number of bits, which will
485 	cmpw	$64,%cx	/* shrd only works for 0..31 bits */
488 	cmpw	$32,%cx	/* shrd only works for 0..31 bits */
493  *   is for a small de-normalising shift.
494  * Shift by [1..31] bits
498 	setne	%ch		/* Save whether %edx is non-zero */
507 /* Shift by [32..63] bits */
518 	orl	%edx,%edx		/* test these 32 bits */
528 /* Shift by [64..) bits */
550 /* This is easy, %eax must be non-zero, so.. */
563 /* Undo the de-normalisation. */
584 	orl	%eax,%eax		/* ms bits */
587 	orl	%eax,%eax		/* ms bits */
600 	testb	$0xff,FPU_bits_lost	/* bits lost == underflow */
645 	/* The number may have been changed to a non-denormal */
707 	mov	$-1,%eax