mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-10-31 16:02:52 +01:00
95a2f42a75
In particular: movsbw %al, %ax --> cbtw movswl %ax, %eax --> cwtl movslq %eax, %rax --> cltq According to Intel's manual those have the same performance characteristics but come with a smaller encoding. llvm-svn: 186174
13 lines
325 B
LLVM
13 lines
325 B
LLVM
; RUN: llc < %s -march=x86 -mattr=+sse42 | FileCheck %s
|
|
; CHECK: cwtl
|
|
; CHECK: cwtl
|
|
|
|
; sign extension v2i32 to v2i16
|
|
|
|
define void @convert(<2 x i32>* %dst.addr, <2 x i16> %src) nounwind {
|
|
entry:
|
|
%signext = sext <2 x i16> %src to <2 x i32> ; <<12 x i8>> [#uses=1]
|
|
store <2 x i32> %signext, <2 x i32>* %dst.addr
|
|
ret void
|
|
}
|