[PATCH] Update ppc ulps

[PATCH] Update ppc ulps

[Jakub Jelinek]

Hi!

I'm getting on both ppc and ppc64 2.125 ulp error on clog10 (> 2ulp
allowed), 0.75ulp on y0 1/8 and 1ulp on imag csinh (-2-3i).

2006-09-24  Jakub Jelinek  <jakub@redhat.com>

	* sysdeps/powerpc/fpu/libm-test-ulps: Updated.

--- libc/sysdeps/powerpc/fpu/libm-test-ulps.jj	2006-01-31 22:31:27.000000000 +0100
+++ libc/sysdeps/powerpc/fpu/libm-test-ulps	2006-09-24 11:55:42.000000000 +0200
@@ -264,8 +264,8 @@ ldouble: 1
 Test "Real part of: clog10 (0.75 + 1.25 i) == 0.163679467193165171449476605077428975 + 0.447486970040493067069984724340855636 i":
 float: 1
 ifloat: 1
-ildouble: 2
-ldouble: 2
+ildouble: 3
+ldouble: 3
 Test "Imaginary part of: clog10 (3 + inf i) == inf + pi/2*log10(e) i":
 double: 1
 float: 1
@@ -364,6 +364,8 @@ ldouble: 2
 Test "Imaginary part of: csinh (-2 - 3 i) == 3.59056458998577995201256544779481679 - 0.530921086248519805267040090660676560 i":
 double: 1
 idouble: 1
+ildouble: 1
+ldouble: 1
 Test "Real part of: csinh (0.75 + 1.25 i) == 0.259294854551162779153349830618433028 + 1.22863452409509552219214606515777594 i":
 float: 1
 ifloat: 1
@@ -739,6 +741,9 @@ idouble: 1
 ifloat: 1
 
 # y0
+Test "y0 (0.125) == -1.38968062514384052915582277745018693":
+ildouble: 1
+ldouble: 1
 Test "y0 (0.75) == -0.137172769385772397522814379396581855":
 ildouble: 1
 ldouble: 1
@@ -800,6 +805,9 @@ ildouble: 2
 ldouble: 2
 
 # yn
+Test "yn (0, 0.125) == -1.38968062514384052915582277745018693":
+ildouble: 1
+ldouble: 1
 Test "yn (0, 0.75) == -0.137172769385772397522814379396581855":
 ildouble: 1
 ldouble: 1
@@ -1066,8 +1074,8 @@ ldouble: 1
 Function: Real part of "clog10":
 float: 1
 ifloat: 1
-ildouble: 2
-ldouble: 2
+ildouble: 3
+ldouble: 3
 
 Function: Imaginary part of "clog10":
 double: 1

	Jakub

Re: [PATCH] Update ppc ulps

[Steven Munroe]

Jakub Jelinek wrote:

>Hi!
>
>I'm getting on both ppc and ppc64 2.125 ulp error on clog10 (> 2ulp
>allowed), 0.75ulp on y0 1/8 and 1ulp on imag csinh (-2-3i).
>
>  
>
Which gcc are you using? I found that gcc-4.2 or gcc-4.1.1 with the 
reassociation patch backport causes upls errors in ppc that are not 
there for just gcc-4.1.1.

I have not had time to tract this down to a simple test case that I can 
hand to the gcc folks.

Re: [PATCH] Update ppc ulps

[Jakub Jelinek]

On Sun, Sep 24, 2006 at 03:11:45PM -0500, Steven Munroe wrote:
> >I'm getting on both ppc and ppc64 2.125 ulp error on clog10 (> 2ulp
> >allowed), 0.75ulp on y0 1/8 and 1ulp on imag csinh (-2-3i).
> >
> Which gcc are you using? I found that gcc-4.2 or gcc-4.1.1 with the 
> reassociation patch backport causes upls errors in ppc that are not 
> there for just gcc-4.1.1.

I have reassoc backport in.  That's one of the reasons why I haven't
regenerated the ulps, just merged, so that both vanilla 4.1.x, 4.1.x
with reassoc etc. pass.  While in the above 4 cases gcc with reassoc
generates worse code, for several ones there is an improvement too.

	Jakub