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[Bug other/21398] gcc emits invalid operands for xchgb %b0, %h0
- From: "pluto at pld-linux dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 5 May 2005 14:22:40 -0000
- Subject: [Bug other/21398] gcc emits invalid operands for xchgb %b0, %h0
- References: <20050505134452.21398.pluto@pld-linux.org>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From pluto at pld-linux dot org 2005-05-05 14:22 -------
in online docs i see that "q" means "byte addressable register (a,b,c,d)".
in i386.h i see something differ for x86_64. did i miss something in docs?
#define REG_CLASS_FROM_LETTER(C) \
((C) == 'r' ? GENERAL_REGS : \
(C) == 'R' ? LEGACY_REGS : \
(C) == 'q' ? TARGET_64BIT ? GENERAL_REGS : Q_REGS : \
^^^^^^^^^^^^^^^^^^^^^^^^^^^
(C) == 'Q' ? Q_REGS : \
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21398