[Mesa-dev] [PATCH] gallivm: fix rsq behavior

[Zack Rusin]

GLSL spec says that rsq is undefined for src<=0, but the D3D10
spec says it needs to be a NaN, so lets stop taking an absolute
value of the source which completely breaks that behavior.

Signed-off-by: Zack Rusin <zackr at vmware.com>
---
 src/gallium/auxiliary/gallivm/lp_bld_tgsi_action.c |    2 --
 1 file changed, 2 deletions(-)

diff --git a/src/gallium/auxiliary/gallivm/lp_bld_tgsi_action.c b/src/gallium/auxiliary/gallivm/lp_bld_tgsi_action.c
index 1feaa19..8c26918 100644
--- a/src/gallium/auxiliary/gallivm/lp_bld_tgsi_action.c
+++ b/src/gallium/auxiliary/gallivm/lp_bld_tgsi_action.c
@@ -633,8 +633,6 @@ rsq_emit(
    struct lp_build_tgsi_context * bld_base,
    struct lp_build_emit_data * emit_data)
 {
-   emit_data->args[0] = lp_build_emit_llvm_unary(bld_base, TGSI_OPCODE_ABS,
-                                               emit_data->args[0]);
    if (bld_base->rsq_action.emit) {
       bld_base->rsq_action.emit(&bld_base->rsq_action, bld_base, emit_data);
    } else {
-- 
1.7.10.4