From 7d555f2f4ce8be3c53bcc914620bcefc22c05cb5 Mon Sep 17 00:00:00 2001 From: Vadim Girlin Date: Thu, 25 Apr 2013 19:42:31 +0400 Subject: [PATCH] r600g: mask unused source components for SAMPLE This results in more clean shader code and may improve the quality of optimized code produced by r600-sb due to eliminated false dependencies in some cases. Signed-off-by: Vadim Girlin --- src/gallium/drivers/r600/r600_shader.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/src/gallium/drivers/r600/r600_shader.c b/src/gallium/drivers/r600/r600_shader.c index bb54e38a63c..f0d3be405d2 100644 --- a/src/gallium/drivers/r600/r600_shader.c +++ b/src/gallium/drivers/r600/r600_shader.c @@ -4743,6 +4743,26 @@ static int tgsi_tex(struct r600_shader_ctx *ctx) /* the array index is read from Z */ tex.coord_type_z = 0; + /* mask unused source components */ + if (opcode == FETCH_OP_SAMPLE) { + switch (inst->Texture.Texture) { + case TGSI_TEXTURE_2D: + case TGSI_TEXTURE_RECT: + tex.src_sel_z = 7; + tex.src_sel_w = 7; + break; + case TGSI_TEXTURE_1D_ARRAY: + tex.src_sel_y = 7; + tex.src_sel_w = 7; + break; + case TGSI_TEXTURE_1D: + tex.src_sel_y = 7; + tex.src_sel_z = 7; + tex.src_sel_w = 7; + break; + } + } + r = r600_bytecode_add_tex(ctx->bc, &tex); if (r) return r; -- 2.30.2