Add more tests of exp, exp10, exp2, expm1.

This patch adds some randomly-generated tests of exp, exp10, exp2 and
expm1 that are observed to increase ulps on x86_64.

Tested for x86_64 and x86 and ulps updated accordingly.

	* math/auto-libm-test-in: Add more tests of exp, exp10, exp2 and
	expm1.
	* math/auto-libm-test-out: Regenerated.
	* sysdeps/i386/fpu/libm-test-ulps: Update.
	* sysdeps/x86_64/fpu/libm-test-ulps: Likewise.

2 files changed, 85 insertions, 29 deletions

diff --git a/sysdeps/i386/fpu/libm-test-ulps b/sysdeps/i386/fpu/libm-test-ulps
index 4d8054f..91e5c63 100644
--- a/sysdeps/i386/fpu/libm-test-ulps
+++ b/sysdeps/i386/fpu/libm-test-ulps
@@ -1339,6 +1339,10 @@ ifloat: 2
 ildouble: 4
 ldouble: 4
 
+Function: "exp":
+ildouble: 1
+ldouble: 1
+
 Function: "exp10":
 ildouble: 1
 ldouble: 1
@@ -1356,24 +1360,46 @@ double: 1
 float: 1
 idouble: 1
 ifloat: 1
-ildouble: 1
-ldouble: 1
+ildouble: 2
+ldouble: 2
 
 Function: "exp10_upward":
 double: 1
 float: 1
 idouble: 1
 ifloat: 1
+ildouble: 2
+ldouble: 2
+
+Function: "exp2":
+double: 1
+idouble: 1
+ildouble: 1
+ldouble: 1
+
+Function: "exp2_downward":
+ildouble: 1
+ldouble: 1
+
+Function: "exp2_towardzero":
+ildouble: 1
+ldouble: 1
+
+Function: "exp2_upward":
 ildouble: 1
 ldouble: 1
 
 Function: "exp_downward":
 double: 1
 idouble: 1
+ildouble: 1
+ldouble: 1
 
 Function: "exp_towardzero":
 double: 1
 idouble: 1
+ildouble: 1
+ldouble: 1
 
 Function: "exp_upward":
 ildouble: 1
@@ -1404,8 +1430,8 @@ double: 1
 float: 1
 idouble: 1
 ifloat: 1
-ildouble: 3
-ldouble: 3
+ildouble: 4
+ldouble: 4
 
 Function: "gamma":
 double: 1
@@ -1682,16 +1708,16 @@ double: 1
 float: 1
 idouble: 1
 ifloat: 1
-ildouble: 1
-ldouble: 1
+ildouble: 2
+ldouble: 2
 
 Function: "pow10_upward":
 double: 1
 float: 1
 idouble: 1
 ifloat: 1
-ildouble: 1
-ldouble: 1
+ildouble: 2
+ldouble: 2
 
 Function: "pow_downward":
 double: 1
diff --git a/sysdeps/x86_64/fpu/libm-test-ulps b/sysdeps/x86_64/fpu/libm-test-ulps
index 2a7cc4d..8b4cdd4 100644
--- a/sysdeps/x86_64/fpu/libm-test-ulps
+++ b/sysdeps/x86_64/fpu/libm-test-ulps
@@ -1429,21 +1429,41 @@ ifloat: 5
 ildouble: 4
 ldouble: 4
 
+Function: "exp":
+ildouble: 1
+ldouble: 1
+
 Function: "exp10":
-double: 1
-idouble: 1
+double: 2
+idouble: 2
 ildouble: 1
 ldouble: 1
 
 Function: "exp10_downward":
-double: 1
+double: 2
 float: 1
-idouble: 1
+idouble: 2
 ifloat: 1
 ildouble: 2
 ldouble: 2
 
 Function: "exp10_towardzero":
+double: 2
+float: 1
+idouble: 2
+ifloat: 1
+ildouble: 2
+ldouble: 2
+
+Function: "exp10_upward":
+double: 2
+float: 1
+idouble: 2
+ifloat: 1
+ildouble: 2
+ldouble: 2
+
+Function: "exp2":
 double: 1
 float: 1
 idouble: 1
@@ -1451,10 +1471,16 @@ ifloat: 1
 ildouble: 1
 ldouble: 1
 
-Function: "exp10_upward":
-double: 1
+Function: "exp2_downward":
+ildouble: 1
+ldouble: 1
+
+Function: "exp2_towardzero":
+ildouble: 1
+ldouble: 1
+
+Function: "exp2_upward":
 float: 1
-idouble: 1
 ifloat: 1
 ildouble: 1
 ldouble: 1
@@ -1462,10 +1488,14 @@ ldouble: 1
 Function: "exp_downward":
 double: 1
 idouble: 1
+ildouble: 1
+ldouble: 1
 
 Function: "exp_towardzero":
 double: 1
 idouble: 1
+ildouble: 1
+ldouble: 1
 
 Function: "exp_upward":
 double: 1
@@ -1502,8 +1532,8 @@ double: 1
 float: 1
 idouble: 1
 ifloat: 1
-ildouble: 3
-ldouble: 3
+ildouble: 4
+ldouble: 4
 
 Function: "gamma":
 double: 1
@@ -1788,34 +1818,34 @@ ildouble: 1
 ldouble: 1
 
 Function: "pow10":
-double: 1
-idouble: 1
+double: 2
+idouble: 2
 ildouble: 1
 ldouble: 1
 
 Function: "pow10_downward":
-double: 1
+double: 2
 float: 1
-idouble: 1
+idouble: 2
 ifloat: 1
 ildouble: 2
 ldouble: 2
 
 Function: "pow10_towardzero":
-double: 1
+double: 2
 float: 1
-idouble: 1
+idouble: 2
 ifloat: 1
-ildouble: 1
-ldouble: 1
+ildouble: 2
+ldouble: 2
 
 Function: "pow10_upward":
-double: 1
+double: 2
 float: 1
-idouble: 1
+idouble: 2
 ifloat: 1
-ildouble: 1
-ldouble: 1
+ildouble: 2
+ldouble: 2
 
 Function: "pow_downward":
 double: 1