llvmpipe: use sse2 conv code for altivec

In lp_build_conv() and lp_build_conv_auto(), there is a special case of
conversion when sse2 is present. That code path is suitable without any
changes to altivec, because all the functions that are called in that
code path already support altivec.

This patch increase the FPS in POWER arch across the board
between 10%-25%

I checked ipers, glxgears, glxspheres64, openarena, xonotic and glmark2.

Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
Reviewed-by: Roland Scheidegger <sroland@vmware.com>

diff --git a/src/gallium/auxiliary/gallivm/lp_bld_conv.c b/src/gallium/auxiliary/gallivm/lp_bld_conv.c
index 14244470c9050a2e3f3ef2d95af697ca19acc279..7854142f736e28602ff135bdc92777e7b73c6a82 100644 (file)
--- a/src/gallium/auxiliary/gallivm/lp_bld_conv.c
+++ b/src/gallium/auxiliary/gallivm/lp_bld_conv.c
@@ -458,7 +458,7 @@ int lp_build_conv_auto(struct gallivm_state *gallivm,
    {
       /* Special case 4x4f --> 1x16ub */
       if (src_type.length == 4 &&
-          util_cpu_caps.has_sse2)
+            (util_cpu_caps.has_sse2 || util_cpu_caps.has_altivec))
       {
          num_dsts = (num_srcs + 3) / 4;
          dst_type->length = num_srcs * 4 >= 16 ? 16 : num_srcs * 4;
@@ -545,7 +545,7 @@ lp_build_conv(struct gallivm_state *gallivm,
        ((dst_type.length == 16 && 4 * num_dsts == num_srcs) ||
         (num_dsts == 1 && dst_type.length * num_srcs == 16 && num_srcs != 3)) &&
 
-       util_cpu_caps.has_sse2)
+       (util_cpu_caps.has_sse2 || util_cpu_caps.has_altivec))
    {
       struct lp_build_context bld;
       struct lp_type int16_type, int32_type;