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intel/brw: Use VEC for gl_FragCoord

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This writes the whole destination register in a single builder call.
Eventually, VEC will write the whole destination register in one go,
allowing better visibility into how it is defined.

Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/28971>
This commit is contained in:
Kenneth Graunke 2024-01-08 22:06:55 -08:00
parent d0a24496fd
commit a94e1bd0ac
1 changed files with 4 additions and 26 deletions
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30
src/intel/compiler/brw_fs_nir.cpp
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@ -3549,30 +3549,6 @@ emit_is_helper_invocation(nir_to_brw_state &ntb, fs_reg result)
}
}
static void
emit_fragcoord_interpolation(nir_to_brw_state &ntb, fs_reg wpos)
{
const fs_builder &bld = ntb.bld;
fs_visitor &s = ntb.s;
assert(s.stage == MESA_SHADER_FRAGMENT);
/* gl_FragCoord.x */
bld.MOV(wpos, s.pixel_x);
wpos = offset(wpos, bld, 1);
/* gl_FragCoord.y */
bld.MOV(wpos, s.pixel_y);
wpos = offset(wpos, bld, 1);
/* gl_FragCoord.z */
bld.MOV(wpos, s.pixel_z);
wpos = offset(wpos, bld, 1);
/* gl_FragCoord.w: Already set up in emit_interpolation */
bld.MOV(wpos, s.wpos_w);
}
static fs_reg
emit_frontfacing_interpolation(nir_to_brw_state &ntb)
{
@ -4211,9 +4187,11 @@ fs_nir_emit_fs_intrinsic(nir_to_brw_state &ntb,
break;
}
case nir_intrinsic_load_frag_coord:
emit_fragcoord_interpolation(ntb, dest);
case nir_intrinsic_load_frag_coord: {
fs_reg comps[4] = { s.pixel_x, s.pixel_y, s.pixel_z, s.wpos_w };
bld.VEC(dest, comps, 4);
break;
}
case nir_intrinsic_load_interpolated_input: {
assert(instr->src[0].ssa &&