Mercurial > sdl-ios-xcode
annotate src/video/Xext/extensions/xme.h @ 2752:edd2839b36f7
http://sources.redhat.com/ml/newlib/2002/msg00230.html
Stephen L Moshier wrote:
>
> pow(x,y) returns 0 when x is very close to -1.0 and y is very large.
> The following test program prints
>
> pow(1.0000000000000002e+00 4.5035996273704970e+15) = 2.7182818284590455e+00
> pow(-1.0000000000000002e+00 4.5035996273704970e+15) =0.0000000000000000e+00
> pow(9.9999999999999978e-01 4.5035996273704970e+15) = 3.6787944117144222e-01
> pow(-9.9999999999999978e-01 4.5035996273704970e+15) = 0.0000000000000000e+00
>
> which is incorrect for the negative arguments raised to an odd integer
> power.
>
> -----
> double pow (double, double);
>
> int
> main ()
> {
> double x, y, z;
>
> x = 1.0 + pow (2.0, -52.0);
> y = 1.0 + pow (2.0, 52.0);
> z = pow (x, y);
> printf ("pow(%.16e %.16e) = %.16e\n", x, y, z);
> x = -x;
> z = pow (x, y);
> printf ("pow(%.16e %.16e) = %.16e\n", x, y, z);
> x = 1.0 - pow (2.0, -52.0);
> z = pow (x, y);
> printf ("pow(%.16e %.16e) = %.16e\n", x, y, z);
> x = -x;
> z = pow (x, y);
> printf ("pow(%.16e %.16e) = %.16e\n", x, y, z);
> }
> -----
>
> Here is a patch for newlib/libm/math/epow.c:
Patch checked in and duplicated for ef_pow.c. Thanks.
-- Jeff J.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Mon, 15 Sep 2008 04:31:30 +0000 |
| parents | dea73e1d07b0 |
| children |
| rev | line source |
|---|---|
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caf0328c8058
Add XME hooks to X11 driver instead of relying on libxme...libxme hasn't
Ryan C. Gordon <icculus@icculus.org>
parents:
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1 /* |
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Add XME hooks to X11 driver instead of relying on libxme...libxme hasn't
Ryan C. Gordon <icculus@icculus.org>
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2 * Copyright 1993-2001 by Xi Graphics, Inc. |
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3 * All Rights Reserved. |
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4 * |
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5 * Please see the LICENSE file accompanying this distribution for licensing |
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6 * information. |
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7 * |
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8 * Please send any bug fixes and modifications to src@xig.com. |
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caf0328c8058
Add XME hooks to X11 driver instead of relying on libxme...libxme hasn't
Ryan C. Gordon <icculus@icculus.org>
parents:
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9 * |
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Add XME hooks to X11 driver instead of relying on libxme...libxme hasn't
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parents:
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10 * $XiGId: xme.h,v 1.1.1.1 2001/11/19 19:01:10 jon Exp $ |
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11 * |
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12 */ |
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Ryan C. Gordon <icculus@icculus.org>
parents:
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13 |
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Add XME hooks to X11 driver instead of relying on libxme...libxme hasn't
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
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14 |
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1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
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15 #ifndef _XME_H_INCLUDED |
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Add XME hooks to X11 driver instead of relying on libxme...libxme hasn't
Ryan C. Gordon <icculus@icculus.org>
parents:
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16 #define _XME_H_INCLUDED |
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caf0328c8058
Add XME hooks to X11 driver instead of relying on libxme...libxme hasn't
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parents:
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17 |
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c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
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18 typedef struct |
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c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1242
diff
changeset
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19 { |
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c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1242
diff
changeset
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20 short x; |
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c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1242
diff
changeset
|
21 short y; |
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c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1242
diff
changeset
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22 unsigned short w; |
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c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1242
diff
changeset
|
23 unsigned short h; |
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1242
caf0328c8058
Add XME hooks to X11 driver instead of relying on libxme...libxme hasn't
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
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24 } XiGMiscViewInfo; |
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caf0328c8058
Add XME hooks to X11 driver instead of relying on libxme...libxme hasn't
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
25 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1242
diff
changeset
|
26 typedef struct |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1242
diff
changeset
|
27 { |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1242
diff
changeset
|
28 unsigned short width; |
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c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1242
diff
changeset
|
29 unsigned short height; |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1242
diff
changeset
|
30 int refresh; |
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1242
caf0328c8058
Add XME hooks to X11 driver instead of relying on libxme...libxme hasn't
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
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31 } XiGMiscResolutionInfo; |
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caf0328c8058
Add XME hooks to X11 driver instead of relying on libxme...libxme hasn't
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
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32 |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1242
diff
changeset
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33 extern Bool XiGMiscQueryVersion(Display * dpy, int *major, int *minor); |
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c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1242
diff
changeset
|
34 extern int XiGMiscQueryViews(Display * dpy, int screen, |
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c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1242
diff
changeset
|
35 XiGMiscViewInfo ** pviews); |
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c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1242
diff
changeset
|
36 extern int XiGMiscQueryResolutions(Display * dpy, int screen, int view, |
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c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1242
diff
changeset
|
37 int *pactive, |
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c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1242
diff
changeset
|
38 XiGMiscResolutionInfo ** presolutions); |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1242
diff
changeset
|
39 extern void XiGMiscChangeResolution(Display * dpy, int screen, int view, |
|
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1242
diff
changeset
|
40 int width, int height, int refresh); |
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2063
dea73e1d07b0
Merged Ryan's fix, in case we need it later.
Sam Lantinga <slouken@libsdl.org>
parents:
1895
diff
changeset
|
41 |
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dea73e1d07b0
Merged Ryan's fix, in case we need it later.
Sam Lantinga <slouken@libsdl.org>
parents:
1895
diff
changeset
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42 /* SDL addition from Ryan: free memory used by xme. */ |
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dea73e1d07b0
Merged Ryan's fix, in case we need it later.
Sam Lantinga <slouken@libsdl.org>
parents:
1895
diff
changeset
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43 extern void XiGMiscDestroy(void); |
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dea73e1d07b0
Merged Ryan's fix, in case we need it later.
Sam Lantinga <slouken@libsdl.org>
parents:
1895
diff
changeset
|
44 |
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1242
caf0328c8058
Add XME hooks to X11 driver instead of relying on libxme...libxme hasn't
Ryan C. Gordon <icculus@icculus.org>
parents:
diff
changeset
|
45 #endif /* _XME_H_INCLUDED */ |
|
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1242
diff
changeset
|
46 /* vi: set ts=4 sw=4 expandtab: */ |