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dd523215af
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@12794 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
42 lines
1.1 KiB
ArmAsm
42 lines
1.1 KiB
ArmAsm
// rb_ia64_flushrs and rb_ia64_bsp is written in IA64 assembly language
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// because Intel Compiler for IA64 doesn't support inline assembly.
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//
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// This file is based on following C program compiled by gcc.
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//
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// void rb_ia64_flushrs(void) { __builtin_ia64_flushrs(); }
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// void *rb_ia64_bsp(void) { return __builtin_ia64_bsp(); }
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//
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// Note that rb_ia64_flushrs and rb_ia64_bsp works in its own stack frame.
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// It's because BSP is updated by br.call/brl.call (not alloc instruction).
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// So rb_ia64_flushrs flushes stack frames including caller's one.
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// rb_ia64_bsp returns the address next to caller's register stack frame.
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//
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// See also
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// Intel Itanium Architecture Software Developer's Manual
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// Volume 2: System Architecture.
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//
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.file "ia64.c"
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.text
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.align 16
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.global rb_ia64_flushrs#
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.proc rb_ia64_flushrs#
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rb_ia64_flushrs:
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.prologue
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.body
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flushrs
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;;
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nop.i 0
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br.ret.sptk.many b0
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.endp rb_ia64_flushrs#
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.align 16
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.global rb_ia64_bsp#
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.proc rb_ia64_bsp#
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rb_ia64_bsp:
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.prologue
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.body
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nop.m 0
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;;
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mov r8 = ar.bsp
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br.ret.sptk.many b0
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.endp rb_ia64_bsp#
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.ident "GCC: (GNU) 3.3.5 (Debian 1:3.3.5-13)"
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