Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 104 insertions, 0 deletions

diff --git a/arch/m68k/fpsp040/sasin.S b/arch/m68k/fpsp040/sasin.S
new file mode 100644
index 000000000000..5647a6043903
--- /dev/null
+++ b/arch/m68k/fpsp040/sasin.S
@@ -0,0 +1,104 @@
+|
+|       sasin.sa 3.3 12/19/90
+|
+|       Description: The entry point sAsin computes the inverse sine of
+|               an input argument; sAsind does the same except for denormalized
+|               input.
+|
+|       Input: Double-extended number X in location pointed to
+|               by address register a0.
+|
+|       Output: The value arcsin(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 sASIN takes approximately 310 cycles.
+|
+|       Algorithm:
+|
+|       ASIN
+|       1. If |X| >= 1, go to 3.
+|
+|       2. (|X| < 1) Calculate asin(X) by
+|               z := sqrt( [1-X][1+X] )
+|               asin(X) = atan( x / z ).
+|               Exit.
+|
+|       3. If |X| > 1, go to 5.
+|
+|       4. (|X| = 1) sgn := sign(X), return asin(X) := sgn * Pi/2. Exit.
+|
+|       5. (|X| > 1) Generate an invalid operation by 0 * infinity.
+|               Exit.
+|
+
+|               Copyright (C) Motorola, Inc. 1990
+|                       All Rights Reserved
+|
+|       THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF MOTOROLA
+|       The copyright notice above does not evidence any
+|       actual or intended publication of such source code.
+
+|SASIN  idnt    2,1 | Motorola 040 Floating Point Software Package
+
+        |section        8
+
+PIBY2:  .long 0x3FFF0000,0xC90FDAA2,0x2168C235,0x00000000
+
+        |xref   t_operr
+        |xref   t_frcinx
+        |xref   t_extdnrm
+        |xref   satan
+
+        .global sasind
+sasind:
+|--ASIN(X) = X FOR DENORMALIZED X
+
+        bra             t_extdnrm
+
+        .global sasin
+sasin:
+        fmovex          (%a0),%fp0      | ...LOAD INPUT
+
+        movel           (%a0),%d0
+        movew           4(%a0),%d0
+        andil           #0x7FFFFFFF,%d0
+        cmpil           #0x3FFF8000,%d0
+        bges            asinbig
+
+|--THIS IS THE USUAL CASE, |X| < 1
+|--ASIN(X) = ATAN( X / SQRT( (1-X)(1+X) ) )
+
+        fmoves          #0x3F800000,%fp1
+        fsubx           %fp0,%fp1               | ...1-X
+        fmovemx %fp2-%fp2,-(%a7)
+        fmoves          #0x3F800000,%fp2
+        faddx           %fp0,%fp2               | ...1+X
+        fmulx           %fp2,%fp1               | ...(1+X)(1-X)
+        fmovemx (%a7)+,%fp2-%fp2
+        fsqrtx          %fp1            | ...SQRT([1-X][1+X])
+        fdivx           %fp1,%fp0               | ...X/SQRT([1-X][1+X])
+        fmovemx %fp0-%fp0,(%a0)
+        bsr             satan
+        bra             t_frcinx
+
+asinbig:
+        fabsx           %fp0     | ...|X|
+        fcmps           #0x3F800000,%fp0
+        fbgt            t_operr         |cause an operr exception
+
+|--|X| = 1, ASIN(X) = +- PI/2.
+
+        fmovex          PIBY2,%fp0
+        movel           (%a0),%d0
+        andil           #0x80000000,%d0 | ...SIGN BIT OF X
+        oril            #0x3F800000,%d0 | ...+-1 IN SGL FORMAT
+        movel           %d0,-(%sp)      | ...push SIGN(X) IN SGL-FMT
+        fmovel          %d1,%FPCR
+        fmuls           (%sp)+,%fp0
+        bra             t_frcinx
+
+        |end