diff options
| author | yugui <yugui@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2008-08-25 15:02:05 +0000 |
|---|---|---|
| committer | yugui <yugui@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2008-08-25 15:02:05 +0000 |
| commit | 0dc342de848a642ecce8db697b8fecd83a63e117 (patch) | |
| tree | 2b7ed4724aff1f86073e4740134bda9c4aac1a39 /trunk/ia64.s | |
| parent | ef70cf7138ab8034b5b806f466e4b484b24f0f88 (diff) | |
added tag v1_9_0_4
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/tags/v1_9_0_4@18845 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'trunk/ia64.s')
| -rw-r--r-- | trunk/ia64.s | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/trunk/ia64.s b/trunk/ia64.s new file mode 100644 index 0000000000..92415b4e97 --- /dev/null +++ b/trunk/ia64.s @@ -0,0 +1,42 @@ +// 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)" |