Rev 4973 | Go to most recent revision | Only display areas with differences | Regard whitespace | Details | Blame | Last modification | View Log | RSS feed
| Rev 4973 | Rev 5098 | ||
|---|---|---|---|
| 1 | /* Copyright (C) 1999 DJ Delorie, see COPYING.DJ for details */ |
1 | /* Copyright (C) 1999 DJ Delorie, see COPYING.DJ for details */ |
| 2 | #include |
2 | #include |
| 3 | 3 | ||
| 4 | NaN: |
4 | NaN: |
| 5 | .long 0x00000000, 0xFFF80000 |
5 | .long 0x00000000, 0xFFF80000 |
| 6 | 6 | ||
| 7 | MK_C_SYM(sincos) |
7 | MK_C_SYM(sincos) |
| 8 | 8 | ||
| 9 | /* void sincos(double *cosine, double *sine, double x); */ |
9 | /* void sincos(double x, double *sine, double *cosine); */ |
| 10 | 10 | ||
| 11 | movl 16(%esp), %ecx |
11 | movl 8(%esp), %ecx |
| 12 | 12 | ||
| 13 | movl 4(%esp), %eax /* Point to cosine. */ |
13 | movl 16(%esp), %eax /* Point to cosine. */ |
| 14 | movl 8(%esp), %edx /* Point to sine. */ |
14 | movl 12(%esp), %edx /* Point to sine. */ |
| 15 | 15 | ||
| 16 | andl $0x7FF00000, %ecx /* Examine exponent of x. */ |
16 | andl $0x7FF00000, %ecx /* Examine exponent of x. */ |
| 17 | cmpl $0x43E00000, %ecx /* |x| >= 2^63 */ |
17 | cmpl $0x43E00000, %ecx /* |x| >= 2^63 */ |
| 18 | jae bigarg |
18 | jae bigarg |
| 19 | 19 | ||
| 20 | fldl 12(%esp) |
20 | fldl 4(%esp) |
| 21 | fsincos |
21 | fsincos |
| 22 | fstpl (%eax) /* cos */ |
22 | fstpl (%eax) /* cos */ |
| 23 | fstpl (%edx) /* sin */ |
23 | fstpl (%edx) /* sin */ |
| 24 | ret |
24 | ret |
| 25 | 25 | ||
| 26 | bigarg: |
26 | bigarg: |
| 27 | cmpl $0x7FF00000, %ecx /* x is INF or NaN. */ |
27 | cmpl $0x7FF00000, %ecx /* x is INF or NaN. */ |
| 28 | jb finite |
28 | jb finite |
| 29 | movl NaN, %ecx /* Return -NaN */ |
29 | movl NaN, %ecx /* Return -NaN */ |
| 30 | movl %ecx, (%eax) |
30 | movl %ecx, (%eax) |
| 31 | movl %ecx, (%edx) |
31 | movl %ecx, (%edx) |
| 32 | movl NaN+4, %ecx |
32 | movl NaN+4, %ecx |
| 33 | movl %ecx, 4(%eax) |
33 | movl %ecx, 4(%eax) |
| 34 | movl %ecx, 4(%edx) |
34 | movl %ecx, 4(%edx) |
| 35 | movl $1, C_SYM(errno) |
35 | movl $1, C_SYM(errno) |
| 36 | ret |
36 | ret |
| 37 | 37 | ||
| 38 | finite: |
38 | finite: |
| 39 | fld1 |
39 | fld1 |
| 40 | fstpl (%eax) /* cos = 1. */ |
40 | fstpl (%eax) /* cos = 1. */ |
| 41 | fldz |
41 | fldz |
| 42 | fstpl (%edx) /* sin = 0. */ |
42 | fstpl (%edx) /* sin = 0. */ |
| 43 | ret |
43 | ret |