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pan/bi: Implement frag coord with the builder

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Much slicker :-)

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8135>
This commit is contained in:
Alyssa Rosenzweig 2020-12-11 22:49:54 -05:00 • committed by Marge Bot
parent 2e57684d2d
commit 0ae835499d
1 changed files with 28 additions and 0 deletions
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28
src/panfrost/bifrost/bifrost_compile.c
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@ -919,6 +919,34 @@ bi_emit_sysval(bi_context *ctx, nir_instr *instr,
bi_emit(ctx, load);
}
/* gl_FragCoord.xy = u16_to_f32(R59.xy) + 0.5
* gl_FragCoord.z = ld_vary(fragz)
* gl_FragCoord.w = ld_vary(fragw)
*/
static void
bi_emit_load_frag_coord(bi_builder *b, nir_intrinsic_instr *instr)
{
bi_index src[4] = {};
for (unsigned i = 0; i < 2; ++i) {
src[i] = bi_fadd_f32(b,
bi_u16_to_f32(b, bi_half(bi_register(59), i)),
bi_imm_f32(0.5f), BI_ROUND_NONE);
}
for (unsigned i = 0; i < 2; ++i) {
src[2 + i] = bi_ld_var_special(b, bi_zero(),
BI_REGISTER_FORMAT_F32, BI_SAMPLE_CENTER,
BI_UPDATE_CLOBBER,
(i == 0) ? BI_VARYING_NAME_FRAG_Z :
BI_VARYING_NAME_FRAG_W,
BI_VECSIZE_NONE);
}
bi_make_vec_to(b, bi_dest_index(&instr->dest), src, NULL, 4, 32);
}
/* gl_FragCoord.xy = u16_to_f32(R59.xy) + 0.5
* gl_FragCoord.z = ld_vary(fragz)
* gl_FragCoord.w = ld_vary(fragw)