set_range_metadata(ctx, tid, 0, 64);
return tid;
}
+
+/*
+ * SI implements derivatives using the local data store (LDS)
+ * All writes to the LDS happen in all executing threads at
+ * the same time. TID is the Thread ID for the current
+ * thread and is a value between 0 and 63, representing
+ * the thread's position in the wavefront.
+ *
+ * For the pixel shader threads are grouped into quads of four pixels.
+ * The TIDs of the pixels of a quad are:
+ *
+ * +------+------+
+ * |4n + 0|4n + 1|
+ * +------+------+
+ * |4n + 2|4n + 3|
+ * +------+------+
+ *
+ * So, masking the TID with 0xfffffffc yields the TID of the top left pixel
+ * of the quad, masking with 0xfffffffd yields the TID of the top pixel of
+ * the current pixel's column, and masking with 0xfffffffe yields the TID
+ * of the left pixel of the current pixel's row.
+ *
+ * Adding 1 yields the TID of the pixel to the right of the left pixel, and
+ * adding 2 yields the TID of the pixel below the top pixel.
+ */
+LLVMValueRef
+ac_emit_ddxy(struct ac_llvm_context *ctx,
+ bool has_ds_bpermute,
+ uint32_t mask,
+ int idx,
+ LLVMValueRef lds,
+ LLVMValueRef val)
+{
+ LLVMValueRef thread_id, tl, trbl, tl_tid, trbl_tid, args[2];
+ LLVMValueRef result;
+
+ thread_id = ac_get_thread_id(ctx);
+
+ tl_tid = LLVMBuildAnd(ctx->builder, thread_id,
+ LLVMConstInt(ctx->i32, mask, false), "");
+
+ trbl_tid = LLVMBuildAdd(ctx->builder, tl_tid,
+ LLVMConstInt(ctx->i32, idx, false), "");
+
+ if (has_ds_bpermute) {
+ args[0] = LLVMBuildMul(ctx->builder, tl_tid,
+ LLVMConstInt(ctx->i32, 4, false), "");
+ args[1] = val;
+ tl = ac_emit_llvm_intrinsic(ctx,
+ "llvm.amdgcn.ds.bpermute", ctx->i32,
+ args, 2, AC_FUNC_ATTR_READNONE);
+
+ args[0] = LLVMBuildMul(ctx->builder, trbl_tid,
+ LLVMConstInt(ctx->i32, 4, false), "");
+ trbl = ac_emit_llvm_intrinsic(ctx,
+ "llvm.amdgcn.ds.bpermute", ctx->i32,
+ args, 2, AC_FUNC_ATTR_READNONE);
+ } else {
+ LLVMValueRef store_ptr, load_ptr0, load_ptr1;
+
+ store_ptr = ac_build_gep0(ctx, lds, thread_id);
+ load_ptr0 = ac_build_gep0(ctx, lds, tl_tid);
+ load_ptr1 = ac_build_gep0(ctx, lds, trbl_tid);
+
+ LLVMBuildStore(ctx->builder, val, store_ptr);
+ tl = LLVMBuildLoad(ctx->builder, load_ptr0, "");
+ trbl = LLVMBuildLoad(ctx->builder, load_ptr1, "");
+ }
+
+ tl = LLVMBuildBitCast(ctx->builder, tl, ctx->f32, "");
+ trbl = LLVMBuildBitCast(ctx->builder, trbl, ctx->f32, "");
+ result = LLVMBuildFSub(ctx->builder, trbl, tl, "");
+ return result;
+}
emit_data->output[emit_data->chan] = samples;
}
-/*
- * SI implements derivatives using the local data store (LDS)
- * All writes to the LDS happen in all executing threads at
- * the same time. TID is the Thread ID for the current
- * thread and is a value between 0 and 63, representing
- * the thread's position in the wavefront.
- *
- * For the pixel shader threads are grouped into quads of four pixels.
- * The TIDs of the pixels of a quad are:
- *
- * +------+------+
- * |4n + 0|4n + 1|
- * +------+------+
- * |4n + 2|4n + 3|
- * +------+------+
- *
- * So, masking the TID with 0xfffffffc yields the TID of the top left pixel
- * of the quad, masking with 0xfffffffd yields the TID of the top pixel of
- * the current pixel's column, and masking with 0xfffffffe yields the TID
- * of the left pixel of the current pixel's row.
- *
- * Adding 1 yields the TID of the pixel to the right of the left pixel, and
- * adding 2 yields the TID of the pixel below the top pixel.
- */
-/* masks for thread ID. */
-#define TID_MASK_TOP_LEFT 0xfffffffc
-#define TID_MASK_TOP 0xfffffffd
-#define TID_MASK_LEFT 0xfffffffe
-
static void si_llvm_emit_ddxy(
const struct lp_build_tgsi_action *action,
struct lp_build_tgsi_context *bld_base,
struct si_shader_context *ctx = si_shader_context(bld_base);
struct gallivm_state *gallivm = bld_base->base.gallivm;
unsigned opcode = emit_data->info->opcode;
- LLVMValueRef thread_id, tl, trbl, tl_tid, trbl_tid, val, args[2];
+ LLVMValueRef val;
int idx;
unsigned mask;
- thread_id = ac_get_thread_id(&ctx->ac);
-
if (opcode == TGSI_OPCODE_DDX_FINE)
- mask = TID_MASK_LEFT;
+ mask = AC_TID_MASK_LEFT;
else if (opcode == TGSI_OPCODE_DDY_FINE)
- mask = TID_MASK_TOP;
+ mask = AC_TID_MASK_TOP;
else
- mask = TID_MASK_TOP_LEFT;
-
- tl_tid = LLVMBuildAnd(gallivm->builder, thread_id,
- lp_build_const_int32(gallivm, mask), "");
+ mask = AC_TID_MASK_TOP_LEFT;
/* for DDX we want to next X pixel, DDY next Y pixel. */
idx = (opcode == TGSI_OPCODE_DDX || opcode == TGSI_OPCODE_DDX_FINE) ? 1 : 2;
- trbl_tid = LLVMBuildAdd(gallivm->builder, tl_tid,
- lp_build_const_int32(gallivm, idx), "");
val = LLVMBuildBitCast(gallivm->builder, emit_data->args[0], ctx->i32, "");
-
- if (ctx->screen->has_ds_bpermute) {
- args[0] = LLVMBuildMul(gallivm->builder, tl_tid,
- lp_build_const_int32(gallivm, 4), "");
- args[1] = val;
- tl = lp_build_intrinsic(gallivm->builder,
- "llvm.amdgcn.ds.bpermute", ctx->i32,
- args, 2, LP_FUNC_ATTR_READNONE);
-
- args[0] = LLVMBuildMul(gallivm->builder, trbl_tid,
- lp_build_const_int32(gallivm, 4), "");
- trbl = lp_build_intrinsic(gallivm->builder,
- "llvm.amdgcn.ds.bpermute", ctx->i32,
- args, 2, LP_FUNC_ATTR_READNONE);
- } else {
- LLVMValueRef store_ptr, load_ptr0, load_ptr1;
-
- store_ptr = ac_build_gep0(&ctx->ac, ctx->lds, thread_id);
- load_ptr0 = ac_build_gep0(&ctx->ac, ctx->lds, tl_tid);
- load_ptr1 = ac_build_gep0(&ctx->ac, ctx->lds, trbl_tid);
-
- LLVMBuildStore(gallivm->builder, val, store_ptr);
- tl = LLVMBuildLoad(gallivm->builder, load_ptr0, "");
- trbl = LLVMBuildLoad(gallivm->builder, load_ptr1, "");
- }
-
- tl = LLVMBuildBitCast(gallivm->builder, tl, ctx->f32, "");
- trbl = LLVMBuildBitCast(gallivm->builder, trbl, ctx->f32, "");
-
- emit_data->output[emit_data->chan] =
- LLVMBuildFSub(gallivm->builder, trbl, tl, "");
+ val = ac_emit_ddxy(&ctx->ac, ctx->screen->has_ds_bpermute,
+ mask, idx, ctx->lds, val);
+ emit_data->output[emit_data->chan] = val;
}
/*
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