diff options
| author | Daniel Schürmann <daniel.schuermann@campus.tu-berlin.de> | 2018-02-28 20:26:03 +0100 |
|---|---|---|
| committer | Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl> | 2018-04-14 00:52:22 +0200 |
| commit | d19f20e7930ef9b3383611291b5f18e1e30ac3c1 (patch) | |
| tree | ee80fe112ff84b83d4a7408d977e8b37a43afe88 | |
| parent | 79701b414c84632b8355feebd3c4141fb4e362c6 (diff) | |
ac: make ballot and umsb capable of 64bit inputs
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
| -rw-r--r-- | src/amd/common/ac_llvm_build.c | 34 |
1 files changed, 25 insertions, 9 deletions
diff --git a/src/amd/common/ac_llvm_build.c b/src/amd/common/ac_llvm_build.c index 32d8a02f562..2fb8aeaac68 100644 --- a/src/amd/common/ac_llvm_build.c +++ b/src/amd/common/ac_llvm_build.c @@ -407,8 +407,7 @@ ac_build_ballot(struct ac_llvm_context *ctx, */ ac_build_optimization_barrier(ctx, &args[0]); - if (LLVMTypeOf(args[0]) != ctx->i32) - args[0] = LLVMBuildBitCast(ctx->builder, args[0], ctx->i32, ""); + args[0] = ac_to_integer(ctx, args[0]); return ac_build_intrinsic(ctx, "llvm.amdgcn.icmp.i32", @@ -1291,23 +1290,40 @@ ac_build_umsb(struct ac_llvm_context *ctx, LLVMValueRef arg, LLVMTypeRef dst_type) { - LLVMValueRef args[2] = { + const char *intrin_name; + LLVMTypeRef type; + LLVMValueRef highest_bit; + LLVMValueRef zero; + + if (ac_get_elem_bits(ctx, LLVMTypeOf(arg)) == 64) { + intrin_name = "llvm.ctlz.i64"; + type = ctx->i64; + highest_bit = LLVMConstInt(ctx->i64, 63, false); + zero = ctx->i64_0; + } else { + intrin_name = "llvm.ctlz.i32"; + type = ctx->i32; + highest_bit = LLVMConstInt(ctx->i32, 31, false); + zero = ctx->i32_0; + } + + LLVMValueRef params[2] = { arg, ctx->i1true, }; - LLVMValueRef msb = ac_build_intrinsic(ctx, "llvm.ctlz.i32", - dst_type, args, ARRAY_SIZE(args), + + LLVMValueRef msb = ac_build_intrinsic(ctx, intrin_name, type, + params, 2, AC_FUNC_ATTR_READNONE); /* The HW returns the last bit index from MSB, but TGSI/NIR wants * the index from LSB. Invert it by doing "31 - msb". */ - msb = LLVMBuildSub(ctx->builder, LLVMConstInt(ctx->i32, 31, false), - msb, ""); + msb = LLVMBuildSub(ctx->builder, highest_bit, msb, ""); + msb = LLVMBuildTruncOrBitCast(ctx->builder, msb, ctx->i32, ""); /* check for zero */ return LLVMBuildSelect(ctx->builder, - LLVMBuildICmp(ctx->builder, LLVMIntEQ, arg, - LLVMConstInt(ctx->i32, 0, 0), ""), + LLVMBuildICmp(ctx->builder, LLVMIntEQ, arg, zero, ""), LLVMConstInt(ctx->i32, -1, true), msb, ""); } |