r600g: fix up depth write swizzles.

For some reason r600c, emits extra instructions in the FP to do the depth write output swizzle,
I'm not sure this is required, so here I'm doing it in the exports.

this fixes the mesa trivial demos tri-depthwrite and tri-depthwrite2, it doesn't fix
the glsl1 gl_FragDepth writing test however.

diff --git a/src/gallium/drivers/r600/r600_shader.c b/src/gallium/drivers/r600/r600_shader.c
index d81308b211e2f708586780afc81c2e000c641909..bc1811129bfe0d98fc3ab25edc0b2b506176d318 100644 (file)
--- a/src/gallium/drivers/r600/r600_shader.c
+++ b/src/gallium/drivers/r600/r600_shader.c
@@ -179,7 +179,8 @@ static int r600_pipe_shader_ps(struct pipe_context *ctx, struct r600_context_sta
                if (rshader->input[i].name == TGSI_SEMANTIC_POSITION)
                        have_pos = TRUE;
                if (rshader->input[i].name == TGSI_SEMANTIC_COLOR ||
-                       rshader->input[i].name == TGSI_SEMANTIC_BCOLOR) {
+                   rshader->input[i].name == TGSI_SEMANTIC_BCOLOR ||
+                   rshader->input[i].name == TGSI_SEMANTIC_POSITION) {
                        tmp |= S_028644_FLAT_SHADE(rshader->flat_shade);
                }
                if (rasterizer->sprite_coord_enable & (1 << i)) {
@@ -503,6 +504,8 @@ int r600_shader_from_tgsi(const struct tgsi_token *tokens, struct r600_shader *s
                                output[i].type = V_SQ_CF_ALLOC_EXPORT_WORD0_SQ_EXPORT_PIXEL;
                        } else if (shader->output[i].name == TGSI_SEMANTIC_POSITION) {
                                output[i].array_base = 61;
+                               output[i].swizzle_x = 2;
+                               output[i].swizzle_y = output[i].swizzle_z = output[i].swizzle_w = 7;
                                output[i].type = V_SQ_CF_ALLOC_EXPORT_WORD0_SQ_EXPORT_PIXEL;
                        } else {
                                R600_ERR("unsupported fragment output name %d\n", shader->output[i].name);