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| author | Jari Vetoniemi <jari.vetoniemi@indooratlas.com> | 2020-03-16 18:49:26 +0900 |
|---|---|---|
| committer | Jari Vetoniemi <jari.vetoniemi@indooratlas.com> | 2020-03-30 00:39:06 +0900 |
| commit | fcbf63e62c627deae76c1b8cb8c0876c536ed811 (patch) | |
| tree | 64cb17de3f41a2b6fef2368028fbd00349946994 /jni/ruby/ia64.s | |
Fresh start
Diffstat (limited to 'jni/ruby/ia64.s')
| -rw-r--r-- | jni/ruby/ia64.s | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/jni/ruby/ia64.s b/jni/ruby/ia64.s new file mode 100644 index 0000000..1087105 --- /dev/null +++ b/jni/ruby/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)" |