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ac: add 64bit bitCount support 

v2: use LLVMBuildTrunc()

Reviewed-by: Marek Olšák <marek.olsak@amd.com>
This commit is contained in:
Timothy Arceri 2018-02-06 14:34:55 +11:00
parent bb750d265c
commit 19f9839f0b
1 changed files with 6 additions and 1 deletions
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7
src/amd/common/ac_nir_to_llvm.c
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@ -1917,7 +1917,12 @@ static void visit_alu(struct ac_nir_context *ctx, const nir_alu_instr *instr)
result = ac_build_intrinsic(&ctx->ac, "llvm.bitreverse.i32", ctx->ac.i32, src, 1, AC_FUNC_ATTR_READNONE);
break;
case nir_op_bit_count:
result = ac_build_intrinsic(&ctx->ac, "llvm.ctpop.i32", ctx->ac.i32, src, 1, AC_FUNC_ATTR_READNONE);
if (get_elem_bits(&ctx->ac, LLVMTypeOf(src[0])) == 32)
result = ac_build_intrinsic(&ctx->ac, "llvm.ctpop.i32", ctx->ac.i32, src, 1, AC_FUNC_ATTR_READNONE);
else {
result = ac_build_intrinsic(&ctx->ac, "llvm.ctpop.i64", ctx->ac.i64, src, 1, AC_FUNC_ATTR_READNONE);
result = LLVMBuildTrunc(ctx->ac.builder, result, ctx->ac.i32, "");
}
break;
case nir_op_vec2:
case nir_op_vec3: