diff options
| -rw-r--r-- | lib/Target/PowerPC/README.txt | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/lib/Target/PowerPC/README.txt b/lib/Target/PowerPC/README.txt index 5bdefaa23c..12599cb2fa 100644 --- a/lib/Target/PowerPC/README.txt +++ b/lib/Target/PowerPC/README.txt @@ -579,3 +579,18 @@ Since we know that "Vector" is 16-byte aligned and we know the element offset of ".X", we should change the load into a lve*x instruction, instead of doing a load/store/lve*x sequence. +===-------------------------------------------------------------------------=== + +We generate ugly code for this: + +void func(unsigned int *ret, float dx, float dy, float dz, float dw) { + unsigned code = 0; + if(dx < -dw) code |= 1; + if(dx > dw) code |= 2; + if(dy < -dw) code |= 4; + if(dy > dw) code |= 8; + if(dz < -dw) code |= 16; + if(dz > dw) code |= 32; + *ret = code; +} + |