From: José Fonseca <jfonseca@vmware.com>
Date: Wed, 11 Aug 2010 14:13:17 +0000 (+0100)
Subject: gallivm: Use lp_build_div instead of lp_build_mul + lp_build_rcp.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=10ce6779e8a64c33add70e440f885c210f3fa6ee;p=mesa.git

gallivm: Use lp_build_div instead of lp_build_mul + lp_build_rcp.

Single divide, so let lp_build_div decide how to implement this.

This will save a multiplication in architectures which don't have
a RCP intrinsic.
---

diff --git a/src/gallium/auxiliary/gallivm/lp_bld_sample_soa.c b/src/gallium/auxiliary/gallivm/lp_bld_sample_soa.c
index 665b010ecec..307506507de 100644
--- a/src/gallium/auxiliary/gallivm/lp_bld_sample_soa.c
+++ b/src/gallium/auxiliary/gallivm/lp_bld_sample_soa.c
@@ -1219,8 +1219,7 @@ lp_build_cube_ima(struct lp_build_context *coord_bld, LLVMValueRef coord)
    /* ima = -0.5 / abs(coord); */
    LLVMValueRef negHalf = lp_build_const_vec(coord_bld->type, -0.5);
    LLVMValueRef absCoord = lp_build_abs(coord_bld, coord);
-   LLVMValueRef ima = lp_build_mul(coord_bld, negHalf,
-                                   lp_build_rcp(coord_bld, absCoord));
+   LLVMValueRef ima = lp_build_div(coord_bld, negHalf, absCoord);
    return ima;
 }