On gen7, the swizzles used in DF align16 instructions works for element size of 32 bits, so we can address only 2 consecutive DFs. As we assumed that in the rest of the code and prepare the instructions for this (scalarize_df()), we need to set it to two again.
However, for DF align1 instructions, a width of 2 is wrong as we are not reading the data we want. For example, an uniform would have a region of <0, 2, 1> so it would repeat the first 2 DFs, when we wanted to access to the first 4. This patch sets the default one to 4 and then modifies the width of align16 instruction's DF sources when we translate the logical swizzle to the physical one. Signed-off-by: Samuel Iglesias Gonsálvez <sigles...@igalia.com> Cc: "17.1" <mesa-sta...@lists.freedesktop.org> --- src/intel/compiler/brw_vec4.cpp | 13 ++++++++----- 1 file changed, 8 insertions(+), 5 deletions(-) diff --git a/src/intel/compiler/brw_vec4.cpp b/src/intel/compiler/brw_vec4.cpp index 95f96ea69c0..8b755e1b75e 100644 --- a/src/intel/compiler/brw_vec4.cpp +++ b/src/intel/compiler/brw_vec4.cpp @@ -2003,9 +2003,7 @@ vec4_visitor::convert_to_hw_regs() struct brw_reg reg; switch (src.file) { case VGRF: { - const unsigned type_size = type_sz(src.type); - const unsigned width = REG_SIZE / 2 / MAX2(4, type_size); - reg = byte_offset(brw_vecn_grf(width, src.nr, 0), src.offset); + reg = byte_offset(brw_vecn_grf(4, src.nr, 0), src.offset); reg.type = src.type; reg.abs = src.abs; reg.negate = src.negate; @@ -2013,12 +2011,11 @@ vec4_visitor::convert_to_hw_regs() } case UNIFORM: { - const unsigned width = REG_SIZE / 2 / MAX2(4, type_sz(src.type)); reg = stride(byte_offset(brw_vec4_grf( prog_data->base.dispatch_grf_start_reg + src.nr / 2, src.nr % 2 * 4), src.offset), - 0, width, 1); + 0, 4, 1); reg.type = src.type; reg.abs = src.abs; reg.negate = src.negate; @@ -2576,6 +2573,12 @@ vec4_visitor::apply_logical_swizzle(struct brw_reg *hw_reg, assert(brw_is_single_value_swizzle(reg.swizzle) || is_supported_64bit_region(inst, arg)); + /* Apply the region <2, 2, 1> for GRF or <0, 2, 1> for uniforms, as align16 + * HW can only do 32-bit swizzle channels. + */ + if (reg.file == UNIFORM || reg.file == VGRF) + hw_reg->width = BRW_WIDTH_2; + if (is_supported_64bit_region(inst, arg) && !is_gen7_supported_64bit_swizzle(inst, arg)) { /* Supported 64-bit swizzles are those such that their first two -- 2.11.0 _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/mesa-dev