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// rb_ia64_flushrs and rb_ia64_bsp is written in IA64 assembly language // because Intel Compiler for IA64 doesn’t support inline assembly. // // This file is based on following C program compiled by gcc. // // void rb_ia64_flushrs(void) { __builtin_ia64_flushrs(); } // void *rb_ia64_bsp(void) { return __builtin_ia64_bsp(); } // // Note that rb_ia64_flushrs and rb_ia64_bsp works in its own stack frame. // It’s because BSP is updated by br.call/brl.call (not alloc instruction). // So rb_ia64_flushrs flushes stack frames including caller’s one. // rb_ia64_bsp returns the address next to caller’s register stack frame. // // See also // Intel Itanium Architecture Software Developer’s Manual // Volume 2: System Architecture. //

.file   "ia64.c"
.text
.align 16
.global rb_ia64_flushrs#
.proc rb_ia64_flushrs#

rb_ia64_flushrs:

.prologue
.body
flushrs
;;
nop.i 0
br.ret.sptk.many b0
.endp rb_ia64_flushrs#
.align 16
.global rb_ia64_bsp#
.proc rb_ia64_bsp#

rb_ia64_bsp:

.prologue
.body
nop.m 0
;;
mov r8 = ar.bsp
br.ret.sptk.many b0
.endp rb_ia64_bsp#
.ident  "GCC: (GNU) 3.3.5 (Debian 1:3.3.5-13)"