diff options
| author | samuel <samuel@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2018-11-24 11:35:29 +0000 |
|---|---|---|
| committer | samuel <samuel@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2018-11-24 11:35:29 +0000 |
| commit | e64f71f812324d098bed12ed68c2bc1d6e780c90 (patch) | |
| tree | b47548dacef6f68c8f85fbfcd87cc984430243d3 /ia64.S | |
| parent | 091422388e943de1e67ace6faac3d71ed08c14d2 (diff) | |
Change Makefile rule for assembly to use .S rather than .s
It is more conventional to use compiler to pre-process and
assemble the `.S` file rather than forcing Makefile to use `.s`.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@65952 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'ia64.S')
| -rw-r--r-- | ia64.S | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/ia64.S b/ia64.S new file mode 100644 index 0000000000..1087105585 --- /dev/null +++ b/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)" |