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ac/llvm: Fix ac_build_reduce in wave32 mode.

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Previously, when cluster_size was set to 0, it always worked as if
the cluster size was 64. This commit fixes it in wave32 mode by
changing to work as if the cluster size was set to 32.

Signed-off-by: Timur Kristóf <timur.kristof@gmail.com>
Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
This commit is contained in:
Timur Kristóf
2020-01-10 12:06:53 +01:00
parent a5fe84aefb
commit eccac46cdc
1 changed files with 9 additions and 6 deletions
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15
src/amd/llvm/ac_llvm_build.c
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@@ -4344,12 +4344,15 @@ ac_build_reduce(struct ac_llvm_context *ctx, LLVMValueRef src, nir_op op, unsign
if (cluster_size == 32) return ac_build_wwm(ctx, result);
if (ctx->chip_class >= GFX8) {
if (ctx->chip_class >= GFX10)
swap = ac_build_readlane(ctx, result, LLVMConstInt(ctx->i32, 31, false));
else
swap = ac_build_dpp(ctx, identity, result, dpp_row_bcast31, 0xc, 0xf, false);
result = ac_build_alu_op(ctx, result, swap, op);
result = ac_build_readlane(ctx, result, LLVMConstInt(ctx->i32, 63, 0));
if (ctx->wave_size == 64) {
if (ctx->chip_class >= GFX10)
swap = ac_build_readlane(ctx, result, LLVMConstInt(ctx->i32, 31, false));
else
swap = ac_build_dpp(ctx, identity, result, dpp_row_bcast31, 0xc, 0xf, false);
result = ac_build_alu_op(ctx, result, swap, op);
result = ac_build_readlane(ctx, result, LLVMConstInt(ctx->i32, 63, 0));
}
return ac_build_wwm(ctx, result);
} else {
swap = ac_build_readlane(ctx, result, ctx->i32_0);