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ac/llvm: Implement uclz.

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Signed-off-by: Georg Lehmann <dadschoorse@gmail.com>
Reviewed-by: Timur Kristóf <timur.kristof@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/13895>
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Georg Lehmann 2021-11-20 21:11:57 +01:00 • committed by Marge Bot
parent 8671b866bf
commit 83f51212c1
1 changed files with 8 additions and 0 deletions
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8
src/amd/llvm/ac_nir_to_llvm.c
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@ -1086,6 +1086,14 @@ static void visit_alu(struct ac_nir_context *ctx, const nir_alu_instr *instr)
case nir_op_ifind_msb:
result = ac_build_imsb(&ctx->ac, src[0], ctx->ac.i32);
break;
case nir_op_uclz: {
LLVMValueRef params[2] = {
src[0],
ctx->ac.i1false,
};
result = ac_build_intrinsic(&ctx->ac, "llvm.ctlz.i32", ctx->ac.i32, params, 2, AC_FUNC_ATTR_READNONE);
break;
}
case nir_op_uadd_carry:
result = emit_uint_carry(&ctx->ac, "llvm.uadd.with.overflow.i32", src[0], src[1]);
break;