From: Dave Airlie Date: Thu, 16 Feb 2017 03:54:01 +0000 (+0000) Subject: radv/ac: use shared umsb helper. X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=ebed22ec675dd8feb96edc900cb720ef74845fff;p=mesa.git radv/ac: use shared umsb helper. Reviewed-by: Edward O'Callaghan Signed-off-by: Dave Airlie --- diff --git a/src/amd/common/ac_nir_to_llvm.c b/src/amd/common/ac_nir_to_llvm.c index d3c02ceb4a4..b3dc63c602d 100644 --- a/src/amd/common/ac_nir_to_llvm.c +++ b/src/amd/common/ac_nir_to_llvm.c @@ -936,23 +936,7 @@ static LLVMValueRef emit_ifind_msb(struct nir_to_llvm_context *ctx, static LLVMValueRef emit_ufind_msb(struct nir_to_llvm_context *ctx, LLVMValueRef src0) { - LLVMValueRef args[2] = { - src0, - ctx->i32one, - }; - LLVMValueRef msb = ac_emit_llvm_intrinsic(&ctx->ac, "llvm.ctlz.i32", - ctx->i32, args, ARRAY_SIZE(args), - AC_FUNC_ATTR_READNONE); - - /* The HW returns the last bit index from MSB, but NIR wants - * the index from LSB. Invert it by doing "31 - msb". */ - msb = LLVMBuildSub(ctx->builder, LLVMConstInt(ctx->i32, 31, false), - msb, ""); - - return LLVMBuildSelect(ctx->builder, - LLVMBuildICmp(ctx->builder, LLVMIntEQ, src0, - ctx->i32zero, ""), - LLVMConstInt(ctx->i32, -1, true), msb, ""); + return ac_emit_umsb(&ctx->ac, src0, ctx->i32); } static LLVMValueRef emit_minmax_int(struct nir_to_llvm_context *ctx,