[llvm-commits] CVS: llvm/lib/Target/PowerPC/README_ALTIVEC.txt

[Chris Lattner]

Changes in directory llvm/lib/Target/PowerPC:

README_ALTIVEC.txt updated: 1.31 -> 1.32
---
Log message:

add a note


---
Diffs of the changes:  (+30 -0)

 README_ALTIVEC.txt |   30 ++++++++++++++++++++++++++++++
 1 files changed, 30 insertions(+)


Index: llvm/lib/Target/PowerPC/README_ALTIVEC.txt
diff -u llvm/lib/Target/PowerPC/README_ALTIVEC.txt:1.31 llvm/lib/Target/PowerPC/README_ALTIVEC.txt:1.32
--- llvm/lib/Target/PowerPC/README_ALTIVEC.txt:1.31	Tue Apr 18 13:30:19 2006
+++ llvm/lib/Target/PowerPC/README_ALTIVEC.txt	Wed Apr 19 00:55:06 2006
@@ -108,3 +108,33 @@
 
 //===----------------------------------------------------------------------===//
 
+The code generated for this is truly aweful:
+
+vector float test(float a, float b) {
+ return (vector float){ 0.0, a, 0.0, 0.0}; 
+}
+
+LCPI1_0:                                        ;  float
+        .space  4
+        .text
+        .globl  _test
+        .align  4
+_test:
+        mfspr r2, 256
+        oris r3, r2, 4096
+        mtspr 256, r3
+        lis r3, ha16(LCPI1_0)
+        addi r4, r1, -32
+        stfs f1, -16(r1)
+        addi r5, r1, -16
+        lfs f0, lo16(LCPI1_0)(r3)
+        stfs f0, -32(r1)
+        lvx v2, 0, r4
+        lvx v3, 0, r5
+        vmrghw v3, v3, v2
+        vspltw v2, v2, 0
+        vmrghw v2, v2, v3
+        mtspr 256, r2
+        blr
+
+//===----------------------------------------------------------------------===//