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gallivm: fix f16 quantize.

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Add the correct flush to 0 behaviour.

Fixes:
dEQP-VK.spirv_assembly.instruction.compute.opquantize.flush_to_zero

Reviewed-by: Roland Scheidegger <sroland@vmware.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7416>
This commit is contained in:
Dave Airlie 2020-10-23 16:04:04 +10:00 • committed by Marge Bot
parent 7ae81d65a4
commit ad3849259a
1 changed files with 10 additions and 1 deletions
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11
src/gallium/auxiliary/gallivm/lp_bld_nir.c
View file

@ -504,9 +504,18 @@ do_quantize_to_f16(struct lp_build_nir_context *bld_base,
{
struct gallivm_state *gallivm = bld_base->base.gallivm;
LLVMBuilderRef builder = gallivm->builder;
LLVMValueRef result;
LLVMValueRef result, cond, cond2, temp;
result = LLVMBuildFPTrunc(builder, src, LLVMVectorType(LLVMHalfTypeInContext(gallivm->context), bld_base->base.type.length), "");
result = LLVMBuildFPExt(builder, result, bld_base->base.vec_type, "");
temp = lp_build_abs(get_flt_bld(bld_base, 32), result);
cond = LLVMBuildFCmp(builder, LLVMRealOGT,
LLVMBuildBitCast(builder, lp_build_const_int_vec(gallivm, bld_base->uint_bld.type, 0x38800000), bld_base->base.vec_type, ""),
temp, "");
cond2 = LLVMBuildFCmp(builder, LLVMRealONE, temp, bld_base->base.zero, "");
cond = LLVMBuildAnd(builder, cond, cond2, "");
result = LLVMBuildSelect(builder, cond, bld_base->base.zero, result, "");
return result;
}