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| author | Chris Lattner <sabre@nondot.org> | 2007-08-23 15:16:03 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2007-08-23 15:16:03 +0000 |
| commit | aabd0359a3441fc300834b13b1cd265f22d7d011 (patch) | |
| tree | 99abbb179886d5e7c7ff91a635658859519b9461 /lib/Target/PowerPC/README.txt | |
| parent | 2f597bd09ec0a55689c9fd6d8999bde4fdf8688e (diff) | |
new example
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41318 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/PowerPC/README.txt')
| -rw-r--r-- | lib/Target/PowerPC/README.txt | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/lib/Target/PowerPC/README.txt b/lib/Target/PowerPC/README.txt index 69e60fcb92..10ee323954 100644 --- a/lib/Target/PowerPC/README.txt +++ b/lib/Target/PowerPC/README.txt @@ -117,6 +117,23 @@ mode. Note that this (and the static variable version) is discussed here for GCC: http://gcc.gnu.org/ml/gcc-patches/2006-02/msg00133.html +Here's another example (the sgn function): +double testf(double a) { + return a == 0.0 ? 0.0 : (a > 0.0 ? 1.0 : -1.0); +} + +it produces a BB like this: +LBB1_1: ; cond_true + lis r2, ha16(LCPI1_0) + lfs f0, lo16(LCPI1_0)(r2) + lis r2, ha16(LCPI1_1) + lis r3, ha16(LCPI1_2) + lfs f2, lo16(LCPI1_2)(r3) + lfs f3, lo16(LCPI1_1)(r2) + fsub f0, f0, f1 + fsel f1, f0, f2, f3 + blr + ===-------------------------------------------------------------------------=== PIC Code Gen IPO optimization: |