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author | 2015-08-04 12:17:53 -0700 | |
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committer | 2015-08-04 15:44:42 -0700 | |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/arch/m68k/fpsp040/ssinh.S | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/arch/m68k/fpsp040/ssinh.S')
-rw-r--r-- | kernel/arch/m68k/fpsp040/ssinh.S | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/kernel/arch/m68k/fpsp040/ssinh.S b/kernel/arch/m68k/fpsp040/ssinh.S new file mode 100644 index 000000000..8a560edc7 --- /dev/null +++ b/kernel/arch/m68k/fpsp040/ssinh.S @@ -0,0 +1,134 @@ +| +| ssinh.sa 3.1 12/10/90 +| +| The entry point sSinh computes the hyperbolic sine of +| an input argument; sSinhd does the same except for denormalized +| input. +| +| Input: Double-extended number X in location pointed to +| by address register a0. +| +| Output: The value sinh(X) returned in floating-point register Fp0. +| +| Accuracy and Monotonicity: The returned result is within 3 ulps in +| 64 significant bit, i.e. within 0.5001 ulp to 53 bits if the +| result is subsequently rounded to double precision. The +| result is provably monotonic in double precision. +| +| Speed: The program sSINH takes approximately 280 cycles. +| +| Algorithm: +| +| SINH +| 1. If |X| > 16380 log2, go to 3. +| +| 2. (|X| <= 16380 log2) Sinh(X) is obtained by the formulae +| y = |X|, sgn = sign(X), and z = expm1(Y), +| sinh(X) = sgn*(1/2)*( z + z/(1+z) ). +| Exit. +| +| 3. If |X| > 16480 log2, go to 5. +| +| 4. (16380 log2 < |X| <= 16480 log2) +| sinh(X) = sign(X) * exp(|X|)/2. +| However, invoking exp(|X|) may cause premature overflow. +| Thus, we calculate sinh(X) as follows: +| Y := |X| +| sgn := sign(X) +| sgnFact := sgn * 2**(16380) +| Y' := Y - 16381 log2 +| sinh(X) := sgnFact * exp(Y'). +| Exit. +| +| 5. (|X| > 16480 log2) sinh(X) must overflow. Return +| sign(X)*Huge*Huge to generate overflow and an infinity with +| the appropriate sign. Huge is the largest finite number in +| extended format. Exit. +| + +| Copyright (C) Motorola, Inc. 1990 +| All Rights Reserved +| +| For details on the license for this file, please see the +| file, README, in this same directory. + +|SSINH idnt 2,1 | Motorola 040 Floating Point Software Package + + |section 8 + +T1: .long 0x40C62D38,0xD3D64634 | ... 16381 LOG2 LEAD +T2: .long 0x3D6F90AE,0xB1E75CC7 | ... 16381 LOG2 TRAIL + + |xref t_frcinx + |xref t_ovfl + |xref t_extdnrm + |xref setox + |xref setoxm1 + + .global ssinhd +ssinhd: +|--SINH(X) = X FOR DENORMALIZED X + + bra t_extdnrm + + .global ssinh +ssinh: + fmovex (%a0),%fp0 | ...LOAD INPUT + + movel (%a0),%d0 + movew 4(%a0),%d0 + movel %d0,%a1 | save a copy of original (compacted) operand + andl #0x7FFFFFFF,%d0 + cmpl #0x400CB167,%d0 + bgts SINHBIG + +|--THIS IS THE USUAL CASE, |X| < 16380 LOG2 +|--Y = |X|, Z = EXPM1(Y), SINH(X) = SIGN(X)*(1/2)*( Z + Z/(1+Z) ) + + fabsx %fp0 | ...Y = |X| + + moveml %a1/%d1,-(%sp) + fmovemx %fp0-%fp0,(%a0) + clrl %d1 + bsr setoxm1 | ...FP0 IS Z = EXPM1(Y) + fmovel #0,%fpcr + moveml (%sp)+,%a1/%d1 + + fmovex %fp0,%fp1 + fadds #0x3F800000,%fp1 | ...1+Z + fmovex %fp0,-(%sp) + fdivx %fp1,%fp0 | ...Z/(1+Z) + movel %a1,%d0 + andl #0x80000000,%d0 + orl #0x3F000000,%d0 + faddx (%sp)+,%fp0 + movel %d0,-(%sp) + + fmovel %d1,%fpcr + fmuls (%sp)+,%fp0 |last fp inst - possible exceptions set + + bra t_frcinx + +SINHBIG: + cmpl #0x400CB2B3,%d0 + bgt t_ovfl + fabsx %fp0 + fsubd T1(%pc),%fp0 | ...(|X|-16381LOG2_LEAD) + movel #0,-(%sp) + movel #0x80000000,-(%sp) + movel %a1,%d0 + andl #0x80000000,%d0 + orl #0x7FFB0000,%d0 + movel %d0,-(%sp) | ...EXTENDED FMT + fsubd T2(%pc),%fp0 | ...|X| - 16381 LOG2, ACCURATE + + movel %d1,-(%sp) + clrl %d1 + fmovemx %fp0-%fp0,(%a0) + bsr setox + fmovel (%sp)+,%fpcr + + fmulx (%sp)+,%fp0 |possible exception + bra t_frcinx + + |end |