Mesa (mesa_7_7_branch): llvmpipe: Fix bad SI -> FP conversion into lp_build_log2_approx.

[Jose Fonseca]

Module: Mesa
Branch: mesa_7_7_branch
Commit: 4eb48a3af78beda4ee1628d0ecd6a437a0721a72
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=4eb48a3af78beda4ee1628d0ecd6a437a0721a72

Author: José Fonseca <jfonseca at vmware.com>
Date:   Tue Dec 15 12:13:43 2009 +0000

llvmpipe: Fix bad SI -> FP conversion into lp_build_log2_approx.

It should be a bitcast  as the integer value is actually an encoded FP
already.

---

 src/gallium/drivers/llvmpipe/lp_bld_arit.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/src/gallium/drivers/llvmpipe/lp_bld_arit.c b/src/gallium/drivers/llvmpipe/lp_bld_arit.c
index f5d9db7..d35e13b 100644
--- a/src/gallium/drivers/llvmpipe/lp_bld_arit.c
+++ b/src/gallium/drivers/llvmpipe/lp_bld_arit.c
@@ -1284,7 +1284,7 @@ lp_build_log2_approx(struct lp_build_context *bld,
       /* mant = (float) mantissa(x) */
       mant = LLVMBuildAnd(bld->builder, i, mantmask, "");
       mant = LLVMBuildOr(bld->builder, mant, one, "");
-      mant = LLVMBuildSIToFP(bld->builder, mant, vec_type, "");
+      mant = LLVMBuildBitCast(bld->builder, mant, vec_type, "");
 
       logmant = lp_build_polynomial(bld, mant, lp_build_log2_polynomial,
                                     Elements(lp_build_log2_polynomial));