/------------------------------------------------------------------------- / / sunstudio_x86.s / compare and swap for Sun Studio on x86 / / Portions Copyright (c) 1996-2021, 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