x86_64-asm: =m operand fixes

The problem was with tcctest.c:

    unsigned set;
    __asm__("btsl %1,%0" : "=m"(set) : "Ir"(20) : "cc");

when with tcc compiled with the HAVE_SELINUX option, run with
tcc -run, it would use large addresses far beyond the 32bits
range when tcc did not use the pc-relative mode for accessing
'set' in global data memory.  In fact the assembler did not
know about %rip at all.

Changes:
- memory operands use (%rax) not (%eax)
- conversion from VT_LLOCAL: use type VT_PTR
- support 'k' modifier
- support %rip register
- support X(%rip) pc-relative addresses

The test in tcctest.c is from Michael Matz.

1 files changed, 1 insertions, 0 deletions

diff --git a/i386-tok.h b/i386-tok.h
index fde386f..17d17ce 100644
--- a/i386-tok.h
+++ b/i386-tok.h
@@ -35,6 +35,7 @@
  DEF_ASM(rbp)
  DEF_ASM(rsi)
  DEF_ASM(rdi)
+ DEF_ASM(rip)
 #endif
  DEF_ASM(mm0)
  DEF_ASM(mm1)