Add more tests of log, log10, log1p, log2 [committed]

[Joseph Myers <joseph at codesourcery dot com>]

This patch adds some randomly-generated tests of log, log10, log1p and
log2 that are observed to increase ulps on x86_64.

Tested for x86_64 and x86 and ulps updated accordingly.  Committed.

(auto-libm-test-out diffs omitted below.)

2015-05-01  Joseph Myers  <joseph@codesourcery.com>

	* math/auto-libm-test-in: Add more tests of log, log10, log2 and
	log1p.
	* math/auto-libm-test-out: Regenerated.
	* sysdeps/i386/fpu/libm-test-ulps: Update.
	* sysdeps/x86_64/fpu/libm-test-ulps: Likewise.

diff --git a/math/auto-libm-test-in b/math/auto-libm-test-in
index 051c068..7a8a67b 100644
--- a/math/auto-libm-test-in
+++ b/math/auto-libm-test-in
@@ -1768,6 +1768,11 @@ log 0.75
 log min
 log min_subnorm
 
+log 0xb.0d5dfp-4
+log 0x1.6c3f6p+0
+log 0xa.ae688p-4
+log 0x1.017f8ap+44
+
 log10 1
 log10 0.1
 log10 10.0
@@ -1778,6 +1783,12 @@ log10 0.75
 log10 min
 log10 min_subnorm
 
+log10 0x9.ad6e3p-4
+log10 0x1.7163aep+0
+log10 0xa.9d0d4p-4
+log10 0x1.251ec6p+0
+log10 0x1.022e82p+0
+
 log1p 0
 log1p -0
 log1p e-1
@@ -1797,6 +1808,16 @@ log1p 0x1p100
 log1p 0x1p1000
 log1p max
 
+log1p 0x7.2a4368p-4
+log1p 0x6.d3a118p-4
+log1p 0x5.03f228p+0
+log1p 0x7.264963888ac9p-4
+log1p 0x8.786bdp-4
+log1p 0x7.89dc17790eeb4p-4
+log1p 0x9.81ccf8887c24a7bp-4
+log1p 0xa.5028608bd65f38dp-4
+log1p 0x5.bf78873e20a2d468p-4
+
 log2 1
 log2 e
 log2 2.0
@@ -1809,6 +1830,8 @@ log2 0x1.63d202d04392cp+0
 log2 0xf.d9ce0b1a50e08p-4
 log2 0x1.07465bdc7e41b52ep+0
 log2 0xf.4dfb4p-48
+log2 0x1.0a588ep+0
+log2 0xb.e77c6p-4
 log2 min
 log2 min_subnorm
 
diff --git a/sysdeps/i386/fpu/libm-test-ulps b/sysdeps/i386/fpu/libm-test-ulps
index 91e5c63..ae64aae 100644
--- a/sysdeps/i386/fpu/libm-test-ulps
+++ b/sysdeps/i386/fpu/libm-test-ulps
@@ -1604,16 +1604,16 @@ double: 1
 float: 1
 idouble: 1
 ifloat: 1
-ildouble: 1
-ldouble: 1
+ildouble: 2
+ldouble: 2
 
 Function: "log10_towardzero":
 double: 1
 float: 1
 idouble: 1
 ifloat: 1
-ildouble: 1
-ldouble: 1
+ildouble: 2
+ldouble: 2
 
 Function: "log10_upward":
 double: 1
@@ -1624,32 +1624,32 @@ ildouble: 1
 ldouble: 1
 
 Function: "log1p":
-ildouble: 1
-ldouble: 1
+ildouble: 2
+ldouble: 2
 
 Function: "log1p_downward":
 double: 1
 float: 1
 idouble: 1
 ifloat: 1
-ildouble: 2
-ldouble: 2
+ildouble: 3
+ldouble: 3
 
 Function: "log1p_towardzero":
 double: 1
 float: 1
 idouble: 1
 ifloat: 1
-ildouble: 2
-ldouble: 2
+ildouble: 3
+ldouble: 3
 
 Function: "log1p_upward":
 double: 1
 float: 1
 idouble: 1
 ifloat: 1
-ildouble: 1
-ldouble: 1
+ildouble: 3
+ldouble: 3
 
 Function: "log2":
 ildouble: 1
@@ -1676,12 +1676,12 @@ ildouble: 1
 ldouble: 1
 
 Function: "log_downward":
-ildouble: 1
-ldouble: 1
+ildouble: 2
+ldouble: 2
 
 Function: "log_towardzero":
-ildouble: 1
-ldouble: 1
+ildouble: 2
+ldouble: 2
 
 Function: "log_upward":
 ildouble: 1
diff --git a/sysdeps/x86_64/fpu/libm-test-ulps b/sysdeps/x86_64/fpu/libm-test-ulps
index 8b4cdd4..f0ece1e 100644
--- a/sysdeps/x86_64/fpu/libm-test-ulps
+++ b/sysdeps/x86_64/fpu/libm-test-ulps
@@ -1710,36 +1710,30 @@ ildouble: 1
 ldouble: 1
 
 Function: "log10_downward":
-double: 1
-float: 1
-idouble: 1
-ifloat: 1
-ildouble: 1
-ldouble: 1
+double: 2
+float: 2
+idouble: 2
+ifloat: 2
+ildouble: 2
+ldouble: 2
 
 Function: "log10_towardzero":
-double: 1
-float: 1
-idouble: 1
-ifloat: 1
-ildouble: 1
-ldouble: 1
+double: 2
+float: 2
+idouble: 2
+ifloat: 2
+ildouble: 2
+ldouble: 2
 
 Function: "log10_upward":
-double: 1
-float: 1
-idouble: 1
-ifloat: 1
+double: 2
+float: 2
+idouble: 2
+ifloat: 2
 ildouble: 1
 ldouble: 1
 
 Function: "log1p":
-float: 1
-ifloat: 1
-ildouble: 1
-ldouble: 1
-
-Function: "log1p_downward":
 double: 1
 float: 1
 idouble: 1
@@ -1747,21 +1741,29 @@ ifloat: 1
 ildouble: 2
 ldouble: 2
 
-Function: "log1p_towardzero":
-double: 1
+Function: "log1p_downward":
+double: 2
 float: 1
-idouble: 1
+idouble: 2
 ifloat: 1
-ildouble: 2
-ldouble: 2
+ildouble: 3
+ldouble: 3
+
+Function: "log1p_towardzero":
+double: 2
+float: 2
+idouble: 2
+ifloat: 2
+ildouble: 3
+ldouble: 3
 
 Function: "log1p_upward":
-double: 1
-float: 1
-idouble: 1
-ifloat: 1
-ildouble: 1
-ldouble: 1
+double: 2
+float: 2
+idouble: 2
+ifloat: 2
+ildouble: 3
+ldouble: 3
 
 Function: "log2":
 double: 1
@@ -1780,34 +1782,36 @@ ildouble: 1
 ldouble: 1
 
 Function: "log2_towardzero":
-double: 1
+double: 2
 float: 2
-idouble: 1
+idouble: 2
 ifloat: 2
 ildouble: 1
 ldouble: 1
 
 Function: "log2_upward":
 double: 3
-float: 2
+float: 3
 idouble: 3
-ifloat: 2
+ifloat: 3
 ildouble: 1
 ldouble: 1
 
 Function: "log_downward":
-float: 1
-ifloat: 1
-ildouble: 1
-ldouble: 1
+float: 2
+ifloat: 2
+ildouble: 2
+ldouble: 2
 
 Function: "log_towardzero":
-ildouble: 1
-ldouble: 1
+float: 2
+ifloat: 2
+ildouble: 2
+ldouble: 2
 
 Function: "log_upward":
-float: 1
-ifloat: 1
+float: 2
+ifloat: 2
 ildouble: 1
 ldouble: 1
 

-- 
Joseph S. Myers
joseph@codesourcery.com