[llvm-commits] CVS: llvm/lib/Target/X86/README.txt

[Evan Cheng]

Changes in directory llvm/lib/Target/X86:

README.txt updated: 1.115 -> 1.116
---
Log message:

A few new entries.

---
Diffs of the changes:  (+19 -0)

 README.txt |   19 +++++++++++++++++++
 1 files changed, 19 insertions(+)


Index: llvm/lib/Target/X86/README.txt
diff -u llvm/lib/Target/X86/README.txt:1.115 llvm/lib/Target/X86/README.txt:1.116
--- llvm/lib/Target/X86/README.txt:1.115	Tue May 30 02:37:37 2006
+++ llvm/lib/Target/X86/README.txt	Sun Jun  4 04:08:00 2006
@@ -538,6 +538,9 @@
 	sarl $24, %eax
 	ret
 
+SIGN_EXTEND_INREG can be implemented as (sext (trunc)) to take advantage of 
+sub-registers.
+
 //===---------------------------------------------------------------------===//
 
 Consider this:
@@ -649,3 +652,19 @@
 
 However, if we care more about code size, then imull is better. It's two bytes
 shorter than movl + leal.
+
+//===---------------------------------------------------------------------===//
+
+Implement CTTZ, CTLZ with bsf and bsr.
+
+//===---------------------------------------------------------------------===//
+
+It appears gcc place string data with linkonce linkage in
+.section __TEXT,__const_coal,coalesced instead of
+.section __DATA,__const_coal,coalesced.
+Take a look at darwin.h, there are other Darwin assembler directives that we
+do not make use of.
+
+//===---------------------------------------------------------------------===//
+
+We should handle __attribute__ ((__visibility__ ("hidden"))).