radeonsi/ac: move frag interp emission code to shared llvm code.

This code should be used in radv, so move it to a shared location
in advance of doing that.

Reviewed-by: Nicolai Hähnle <[email protected]>
Signed-off-by: Dave Airlie <[email protected]>

2 files changed, 85 insertions, 0 deletions

diff --git a/src/amd/common/ac_llvm_util.c b/src/amd/common/ac_llvm_util.c
index f3cab921ba1..8c87a139744 100644
--- a/src/amd/common/ac_llvm_util.c
+++ b/src/amd/common/ac_llvm_util.c
@@ -512,3 +512,74 @@ ac_dump_module(LLVMModuleRef module)
 	fprintf(stderr, "%s", str);
 	LLVMDisposeMessage(str);
 }
+
+LLVMValueRef
+ac_build_fs_interp(struct ac_llvm_context *ctx,
+		   LLVMValueRef llvm_chan,
+		   LLVMValueRef attr_number,
+		   LLVMValueRef params,
+		   LLVMValueRef i,
+		   LLVMValueRef j)
+{
+	LLVMValueRef args[5];
+	LLVMValueRef p1;
+	
+	if (HAVE_LLVM < 0x0400) {
+		LLVMValueRef ij[2];
+		ij[0] = LLVMBuildBitCast(ctx->builder, i, ctx->i32, "");
+		ij[1] = LLVMBuildBitCast(ctx->builder, j, ctx->i32, "");
+
+		args[0] = llvm_chan;
+		args[1] = attr_number;
+		args[2] = params;
+		args[3] = ac_build_gather_values(ctx, ij, 2);
+		return ac_emit_llvm_intrinsic(ctx, "llvm.SI.fs.interp",
+					      ctx->f32, args, 4,
+					      AC_FUNC_ATTR_READNONE);
+	}
+
+	args[0] = i;
+	args[1] = llvm_chan;
+	args[2] = attr_number;
+	args[3] = params;
+
+	p1 = ac_emit_llvm_intrinsic(ctx, "llvm.amdgcn.interp.p1",
+				    ctx->f32, args, 4, AC_FUNC_ATTR_READNONE);
+
+	args[0] = p1;
+	args[1] = j;
+	args[2] = llvm_chan;
+	args[3] = attr_number;
+	args[4] = params;
+
+	return ac_emit_llvm_intrinsic(ctx, "llvm.amdgcn.interp.p2",
+				      ctx->f32, args, 5, AC_FUNC_ATTR_READNONE);
+}
+
+LLVMValueRef
+ac_build_fs_interp_mov(struct ac_llvm_context *ctx,
+		       LLVMValueRef parameter,
+		       LLVMValueRef llvm_chan,
+		       LLVMValueRef attr_number,
+		       LLVMValueRef params)
+{
+	LLVMValueRef args[4];
+	if (HAVE_LLVM < 0x0400) {
+		args[0] = llvm_chan;
+		args[1] = attr_number;
+		args[2] = params;
+
+		return ac_emit_llvm_intrinsic(ctx,
+					      "llvm.SI.fs.constant",
+					      ctx->f32, args, 3,
+					      AC_FUNC_ATTR_READNONE);
+	}
+
+	args[0] = parameter;
+	args[1] = llvm_chan;
+	args[2] = attr_number;
+	args[3] = params;
+
+	return ac_emit_llvm_intrinsic(ctx, "llvm.amdgcn.interp.mov",
+				      ctx->f32, args, 4, AC_FUNC_ATTR_READNONE);
+}
diff --git a/src/amd/common/ac_llvm_util.h b/src/amd/common/ac_llvm_util.h
index c07f67ab8b1..2a33765c829 100644
--- a/src/amd/common/ac_llvm_util.h
+++ b/src/amd/common/ac_llvm_util.h
@@ -98,6 +98,20 @@ ac_prepare_cube_coords(struct ac_llvm_context *ctx,
 void
 ac_dump_module(LLVMModuleRef module);
 
+LLVMValueRef
+ac_build_fs_interp(struct ac_llvm_context *ctx,
+		   LLVMValueRef llvm_chan,
+		   LLVMValueRef attr_number,
+		   LLVMValueRef params,
+		   LLVMValueRef i,
+		   LLVMValueRef j);
+
+LLVMValueRef
+ac_build_fs_interp_mov(struct ac_llvm_context *ctx,
+		       LLVMValueRef parameter,
+		       LLVMValueRef llvm_chan,
+		       LLVMValueRef attr_number,
+		       LLVMValueRef params);
 #ifdef __cplusplus
 }
 #endif