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ac: handle subgroup intrinsics

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Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
This commit is contained in:
Daniel Schürmann
2018-03-06 15:04:29 +01:00
committed by Bas Nieuwenhuizen
parent d5f7ebda3e
commit 4b0616e533
1 changed files with 40 additions and 29 deletions
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src/amd/common/ac_nir_to_llvm.c
+40 -29
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@@ -2805,36 +2805,12 @@ static void visit_intrinsic(struct ac_nir_context *ctx,
result = ac_build_ballot(&ctx->ac, get_src(ctx, instr->src[0]));
break;
case nir_intrinsic_read_invocation:
case nir_intrinsic_read_first_invocation: {
LLVMValueRef args[2];
/* Value */
args[0] = get_src(ctx, instr->src[0]);
unsigned num_args;
const char *intr_name;
if (instr->intrinsic == nir_intrinsic_read_invocation) {
num_args = 2;
intr_name = "llvm.amdgcn.readlane";
/* Invocation */
args[1] = get_src(ctx, instr->src[1]);
} else {
num_args = 1;
intr_name = "llvm.amdgcn.readfirstlane";
}
/* We currently have no other way to prevent LLVM from lifting the icmp
* calls to a dominating basic block.
*/
ac_build_optimization_barrier(&ctx->ac, &args[0]);
result = ac_build_intrinsic(&ctx->ac, intr_name,
ctx->ac.i32, args, num_args,
AC_FUNC_ATTR_READNONE |
AC_FUNC_ATTR_CONVERGENT);
result = ac_build_readlane(&ctx->ac, get_src(ctx, instr->src[0]),
get_src(ctx, instr->src[1]));
break;
case nir_intrinsic_read_first_invocation:
result = ac_build_readlane(&ctx->ac, get_src(ctx, instr->src[0]), NULL);
break;
}
case nir_intrinsic_load_subgroup_invocation:
result = ac_get_thread_id(&ctx->ac);
break;
@@ -3088,6 +3064,41 @@ static void visit_intrinsic(struct ac_nir_context *ctx,
result = LLVMBuildSExt(ctx->ac.builder, tmp, ctx->ac.i32, "");
break;
}
case nir_intrinsic_shuffle:
result = ac_build_shuffle(&ctx->ac, get_src(ctx, instr->src[0]),
get_src(ctx, instr->src[1]));
break;
case nir_intrinsic_reduce:
result = ac_build_reduce(&ctx->ac,
get_src(ctx, instr->src[0]),
instr->const_index[0],
instr->const_index[1]);
break;
case nir_intrinsic_inclusive_scan:
result = ac_build_inclusive_scan(&ctx->ac,
get_src(ctx, instr->src[0]),
instr->const_index[0]);
break;
case nir_intrinsic_exclusive_scan:
result = ac_build_exclusive_scan(&ctx->ac,
get_src(ctx, instr->src[0]),
instr->const_index[0]);
break;
case nir_intrinsic_quad_broadcast: {
unsigned lane = nir_src_as_const_value(instr->src[1])->u32[0];
result = ac_build_quad_swizzle(&ctx->ac, get_src(ctx, instr->src[0]),
lane, lane, lane, lane);
break;
}
case nir_intrinsic_quad_swap_horizontal:
result = ac_build_quad_swizzle(&ctx->ac, get_src(ctx, instr->src[0]), 1, 0, 3 ,2);
break;
case nir_intrinsic_quad_swap_vertical:
result = ac_build_quad_swizzle(&ctx->ac, get_src(ctx, instr->src[0]), 2, 3, 0 ,1);
break;
case nir_intrinsic_quad_swap_diagonal:
result = ac_build_quad_swizzle(&ctx->ac, get_src(ctx, instr->src[0]), 3, 2, 1 ,0);
break;
default:
fprintf(stderr, "Unknown intrinsic: ");
nir_print_instr(&instr->instr, stderr);