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/-------------------------------------------------------------------------
/
/ sunstudio_x86.s
/ compare and swap for Sun Studio on x86
/
/ Portions Copyright (c) 1996-2022, PostgreSQL Global Development Group
/ Portions Copyright (c) 1994, Regents of the University of California
/
/ IDENTIFICATION
/ src/backend/port/tas/sunstudio_x86.s
/
/-------------------------------------------------------------------------
/ Fortunately the Sun compiler can process cpp conditionals with -P
/ '/' is the comment for x86, while '!' is the comment for Sparc
.file "tas.s"
#if defined(__amd64)
.code64
#endif
.globl pg_atomic_cas
.type pg_atomic_cas, @function
.section .text, "ax"
.align 16
pg_atomic_cas:
#if defined(__amd64)
movl %edx,%eax
lock
cmpxchgl %esi,(%rdi)
#else
movl 4(%esp), %edx
movl 8(%esp), %ecx
movl 12(%esp), %eax
lock
cmpxchgl %ecx, (%edx)
#endif
ret
.size pg_atomic_cas, . - pg_atomic_cas
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