This creates a new UInstr for multiply. This is mainly so that memcheck
can treat it like add and generate partially-defined results of multiply
with partially defined arguments. It may also speed things up a bit,
if they use lots of multiplies.
This change only deals with signed "new style" multiplies. That the x86
has two quite different kinds of multiply instructions: the "old-style"
signed and unsigned multiply which uses fixed registers (eax:edx) and
generates a result twice the size of the arguments, and the newer signed
multiple which takes general addressing modes. It seems that gcc always
(almost always?) generates the new signed multiply instructions, except
for byte-sized multiplies.
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@1925 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/include/vg_skin.h b/include/vg_skin.h
index 697126d..d8d168a 100644
--- a/include/vg_skin.h
+++ b/include/vg_skin.h
@@ -551,6 +551,7 @@
CMOV, /* Used for cmpxchg and cmov */
/* Arithmetic/logical ops */
+ MUL, UMUL, /* Multiply */
ADD, ADC, SUB, SBB, /* Add/subtract (w/wo carry) */
AND, OR, XOR, NOT, /* Boolean ops */
SHL, SHR, SAR, ROL, ROR, RCL, RCR, /* Shift/rotate (w/wo carry) */