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authorVictor van den Elzen <victor.vde@gmail.com>2009-03-31 04:59:44 +0200
committerVictor van den Elzen <victor.vde@gmail.com>2010-07-24 22:00:12 +0200
commitac732cb6a599836bf4c988e59ac6de4498758c72 (patch)
tree9983e099a978cd40786f9529eb687a6d5a14d265 /nasm.h
parent088d151130b427367766057feadd8351e03ee19b (diff)
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Improve process_ea and introduce -OL
Two fixes: 1. Optimization of [bx+0xFFFF] etc 0xFFFF is an sbyte under 16-bit semantics, so make sure to check it right. 2. Don't optimize displacements in -O0 Displacements that fit into an sbyte or can be removed should *not* be optimized in -O0. Implicit zero displacements are still optimized, e.g.: [eax] -> 0 bit displacement, [ebp] -> 8 bit displacement. However explicit displacements are not optimized: [eax+0] -> 32 bit displacement, [ebp+0] -> 32 bit displacement. Because #2 breaks compatibility with 0.98, I introduced a new optimization level: -OL, legacy.
Diffstat (limited to 'nasm.h')
-rw-r--r--nasm.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/nasm.h b/nasm.h
index 76f561f..7ff1902 100644
--- a/nasm.h
+++ b/nasm.h
@@ -480,7 +480,8 @@ enum ea_flags { /* special EA flags */
EAF_TIMESTWO = 4, /* really do EAX*2 not EAX+EAX */
EAF_REL = 8, /* IP-relative addressing */
EAF_ABS = 16, /* non-IP-relative addressing */
- EAF_FSGS = 32 /* fs/gs segment override present */
+ EAF_FSGS = 32, /* fs/gs segment override present */
+ EAF_NO_OFFS = 64 /* no explicit offset in source */
};
enum eval_hint { /* values for `hinttype' */