i965/gen7: Fix gl_HelperInvocation
It appears that UV immediates aren't working on Ivy Bridge. In this case, a signed version will work, and this fixes the piglit tests/spec/glsl-4.50/execution/helper-invocation.shader_test test. Signed-off-by: Jordan Justen <jordan.l.justen@intel.com> Reviewed-by: Matt Turner <mattst88@gmail.com>
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@ -309,7 +309,7 @@ emit_system_values_block(nir_block *block, fs_visitor *v)
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stride(byte_offset(retype(brw_vec1_grf(1, 0),
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BRW_REGISTER_TYPE_UB), 28),
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1, 8, 0),
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brw_imm_uv(0x76543210));
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brw_imm_v(0x76543210));
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/* A set bit in the pixel mask means the channel is enabled, but
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* that is the opposite of gl_HelperInvocation so we need to invert
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