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author | Chris Lattner <sabre@nondot.org> | 2006-04-13 16:48:00 +0000 |
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committer | Chris Lattner <sabre@nondot.org> | 2006-04-13 16:48:00 +0000 |
commit | ed9379051708a6ef858bcfa4e300f126eb69c178 (patch) | |
tree | 8f9bc3845fa83304c05b9ea3b4fba2bf2ecde820 /lib | |
parent | 61e99c9db845f4824cac9c78c2245cceeb542213 (diff) | |
download | external_llvm-ed9379051708a6ef858bcfa4e300f126eb69c178.zip external_llvm-ed9379051708a6ef858bcfa4e300f126eb69c178.tar.gz external_llvm-ed9379051708a6ef858bcfa4e300f126eb69c178.tar.bz2 |
add a note, move an altivec todo to the altivec list.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27654 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib')
-rw-r--r-- | lib/Target/PowerPC/README.txt | 13 | ||||
-rw-r--r-- | lib/Target/PowerPC/README_ALTIVEC.txt | 10 |
2 files changed, 16 insertions, 7 deletions
diff --git a/lib/Target/PowerPC/README.txt b/lib/Target/PowerPC/README.txt index e29dd52..6b3988d 100644 --- a/lib/Target/PowerPC/README.txt +++ b/lib/Target/PowerPC/README.txt @@ -551,12 +551,11 @@ void func(unsigned int *ret, float dx, float dy, float dz, float dw) { ===-------------------------------------------------------------------------=== -extract_vector_elt of an arbitrary constant vector can be done with the -following instructions: +Complete the signed i32 to FP conversion code using 64-bit registers +transformation, good for PI. See PPCISelLowering.cpp, this comment: -vTemp = vec_splat(v0,2); // 2 is the element the src is in. -vec_ste(&destloc,0,vTemp); + // FIXME: disable this lowered code. This generates 64-bit register values, + // and we don't model the fact that the top part is clobbered by calls. We + // need to flag these together so that the value isn't live across a call. + //setOperationAction(ISD::SINT_TO_FP, MVT::i32, Custom); -We can do an arbitrary non-constant value by using lvsr/perm/ste. - -===-------------------------------------------------------------------------=== diff --git a/lib/Target/PowerPC/README_ALTIVEC.txt b/lib/Target/PowerPC/README_ALTIVEC.txt index 78ea2cd..33e3e2a 100644 --- a/lib/Target/PowerPC/README_ALTIVEC.txt +++ b/lib/Target/PowerPC/README_ALTIVEC.txt @@ -138,3 +138,13 @@ C = vector_shuffle A, B, <0, 1, 2, 4> -> C = vsldoi A, B, 4 //===----------------------------------------------------------------------===// + +extract_vector_elt of an arbitrary constant vector can be done with the +following instructions: + +vTemp = vec_splat(v0,2); // 2 is the element the src is in. +vec_ste(&destloc,0,vTemp); + +We can do an arbitrary non-constant value by using lvsr/perm/ste. + +//===----------------------------------------------------------------------===// |