CPU_SET.3: Add description of CPU_AND(), CPU_OR, CPU_XOR(), and CPU_EQUAL()

Plus a few other small clean-ups of the text

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

man3/CPU_SET.3

@@ -24,7 +24,8 @@
 .\"
 .TH CPU_SET 2 2008-11-12 "Linux" "Linux Programmer's Manual"
 .SH NAME
-CPU_SET, CPU_CLR, CPU_ISSET, CPU_ZERO, CPU_COUNT \-
+CPU_SET, CPU_CLR, CPU_ISSET, CPU_ZERO, CPU_COUNT,
+CPU_AND, CPU_OR, CPU_XOR, CPU_EQUAL \-
 macros for manipulating CPU sets
 .SH SYNOPSIS
 .nf
@@ -32,14 +33,21 @@ macros for manipulating CPU sets
 .B #include <sched.h>
 .sp
 .BI "void CPU_ZERO(cpu_set_t *" set );
-.br
+.sp
 .BI "void CPU_SET(int " cpu ", cpu_set_t *" set );
-.br
 .BI "void CPU_CLR(int " cpu ", cpu_set_t *" set );
-.br
 .BI "int  CPU_ISSET(int " cpu ", cpu_set_t *" set );
-.br
+.sp
 .BI "void CPU_COUNT(cpu_set_t *" set );
+.sp
+.BI "void CPU_AND(cpu_set_t *" destset , 
+.BI "             cpu_set_t *" srcset1 ", cpu_set_t *" srcset2 );
+.BI "void CPU_OR(cpu_set_t *" destset , 
+.BI "             cpu_set_t *" srcset1 ", cpu_set_t *" srcset2 );
+.BI "void CPU_XOR(cpu_set_t *" destset , 
+.BI "             cpu_set_t *" srcset1 ", cpu_set_t *" srcset2 );
+.sp
+.BI "int  CPU_EQUAL(cpu_set_t *" set1 ", cpu_set_t *" set2 );
 .fi
 .SH DESCRIPTION
 The
@@ -53,30 +61,30 @@ The following macros are provided to operate on the CPU set
 .IR set :
 .TP 16
 .BR CPU_ZERO ()
-clears
-.I set
+Clears
+.IR set ,
 so that it contains no CPUs.
 .TP
 .BR CPU_SET ()
-adds CPU
+Add CPU
 .I cpu
 to
 .IR set .
 .TP
 .BR CPU_CLR ()
-removes CPU
+Remove CPU
 .I cpu
 from
 .IR set .
 .TP
 .BR CPU_ISSET ()
-tests to see if CPU
+Test to see if CPU
 .I cpu
 is a member of
 .IR set .
 .TP
 .BR CPU_COUNT ()
-returns the number of CPUs in
+Return the number of CPUs in
 .IR set .
 .PP
 Where a
@@ -93,6 +101,38 @@ The constant
 .B CPU_SETSIZE
 (currently 1024) specifies a value one greater than the maximum CPU
 number that can be stored in a CPU set.
+
+The following macros perform logical operations on SPU sets:
+.TP 16
+.BR CPU_AND ()
+Store the logical AND of the sets
+.I srcset1
+and
+.I srcset2
+in
+.I destset
+(which may be one of the source sets).
+.TP
+.BR CPU_OR ()
+Store the logical OR of the sets
+.I srcset1
+and
+.I srcset2
+in
+.I destset
+(which may be one of the source sets).
+.TP
+.BR CPU_XOR ()
+Store the logical XOR of the sets
+.I srcset1
+and
+.I srcset2
+in
+.I destset
+(which may be one of the source sets).
+.TP
+.BR CPU_EQUAL ()
+Tests whether two CPU set contain the same CPUs.
 .SH "RETURN VALUE"
 .BR CPU_ISSET ()
 returns non-zero if
@@ -105,6 +145,9 @@ otherwise, it returns 0.
 returns the number of CPUs in
 .IR set .
 
+.BR CPU_EQUAL ()
+returns non-zero if the two CPU sets are equal; otherwise it returns 0.
+
 The other functions do not return a value.
 .\" .SH ERRORS
 .\" AFAICT, no E* errors are occur.
@@ -119,6 +162,13 @@ macros were added in glibc 2.3.3.
 
 .BR CPU_COUNT ()
 first appeared in glibc 2.6.
+
+.BR CPU_AND (),
+.BR CPU_OR (),
+.BR CPU_XOR (),
+and
+.BR CPU_EQUAL ()
+first appeared in glibc 2.7.
 .SH "CONFORMING TO"
 These interfaces are Linux-specific.
 .SH "SEE ALSO"