From 93c740bbbb47280cee38872eb58bfad70f93be66 Mon Sep 17 00:00:00 2001 From: Nate Begeman Date: Thu, 2 Feb 2006 07:27:56 +0000 Subject: [PATCH] Update the README git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25902 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Target/PowerPC/README.txt | 22 +++------------------- 1 file changed, 3 insertions(+), 19 deletions(-) diff --git a/lib/Target/PowerPC/README.txt b/lib/Target/PowerPC/README.txt index eccdae71e03..d77d20d85ad 100644 --- a/lib/Target/PowerPC/README.txt +++ b/lib/Target/PowerPC/README.txt @@ -94,19 +94,6 @@ more than one use. Itanium will want this too. ===-------------------------------------------------------------------------=== -int foo(int a, int b) { return a == b ? 16 : 0; } -_foo: - cmpw cr7, r3, r4 - mfcr r2 - rlwinm r2, r2, 31, 31, 31 - slwi r3, r2, 4 - blr - -If we exposed the srl & mask ops after the MFCR that we are doing to select -the correct CR bit, then we could fold the slwi into the rlwinm before it. - -===-------------------------------------------------------------------------=== - #define ARRAY_LENGTH 16 union bitfield { @@ -451,16 +438,13 @@ _test: cntlzw r2, r2 cntlzw r3, r3 srwi r2, r2, 5 - srwi r3, r3, 5 - li r4, 0 + srwi r4, r3, 5 + li r3, 0 cmpwi cr0, r2, 0 bne cr0, LBB1_2 ; LBB1_1: - or r4, r3, r3 + or r3, r4, r4 LBB1_2: - cmplw cr7, r4, r3 - mfcr r2, 1 - rlwinm r3, r2, 29, 31, 31 blr noticed in 2005-05-11-Popcount-ffs-fls.c.