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pan/bi: Fix gl_SampleID read

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Fixes dEQP-GLES31.functional.shaders.sample_variables.sample_id.default_framebuffer

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8774>
This commit is contained in:
Alyssa Rosenzweig 2021-01-27 14:01:23 -05:00
parent 56240f6e85
commit 92569f5d6e
1 changed files with 5 additions and 3 deletions
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8
src/panfrost/bifrost/bifrost_compile.c
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@ -809,10 +809,12 @@ bi_emit_intrinsic(bi_builder *b, nir_intrinsic_instr *instr)
bi_imm_f32(b->shader->blend_constants[3]));
break;
case nir_intrinsic_load_sample_id: {
/* r61[16:23] contains the sampleID, mask it out */
case nir_intrinsic_load_sample_id: {
/* r61[16:23] contains the sampleID, mask it out. Upper bits
* seem to read garbage (despite being architecturally defined
* as zero), so use a 5-bit mask instead of 8-bits */
bi_rshift_and_i32_to(b, dst, bi_register(61), bi_imm_u32(0xff),
bi_rshift_and_i32_to(b, dst, bi_register(61), bi_imm_u32(0x1f),
bi_imm_u8(16));
break;
}