ac: add ac_build_ddxy_interp() helper

Signed-off-by: Samuel Pitoiset <[email protected]>
Reviewed-by: Marek Olšák <[email protected]>

1 files changed, 1 insertions, 26 deletions

diff --git a/src/gallium/drivers/radeonsi/si_shader.c b/src/gallium/drivers/radeonsi/si_shader.c
index efae02ee91c..8ebc8d39e99 100644
--- a/src/gallium/drivers/radeonsi/si_shader.c
+++ b/src/gallium/drivers/radeonsi/si_shader.c
@@ -3924,31 +3924,6 @@ static void si_llvm_emit_ddxy(
 	emit_data->output[emit_data->chan] = val;
 }
 
-/*
- * this takes an I,J coordinate pair,
- * and works out the X and Y derivatives.
- * it returns DDX(I), DDX(J), DDY(I), DDY(J).
- */
-static LLVMValueRef si_llvm_emit_ddxy_interp(
-	struct lp_build_tgsi_context *bld_base,
-	LLVMValueRef interp_ij)
-{
-	struct si_shader_context *ctx = si_shader_context(bld_base);
-	LLVMValueRef result[4], a;
-	unsigned i;
-
-	for (i = 0; i < 2; i++) {
-		a = LLVMBuildExtractElement(ctx->ac.builder, interp_ij,
-					    LLVMConstInt(ctx->i32, i, 0), "");
-		result[i] = ac_build_ddxy(&ctx->ac, AC_TID_MASK_TOP_LEFT, 1,
-					  ac_to_integer(&ctx->ac, a)); /* DDX */
-		result[2+i] = ac_build_ddxy(&ctx->ac, AC_TID_MASK_TOP_LEFT, 2,
-					    ac_to_integer(&ctx->ac, a)); /* DDY */
-	}
-
-	return ac_build_gather_values(&ctx->ac, result, 4);
-}
-
 static void build_interp_intrinsic(const struct lp_build_tgsi_action *action,
 				struct lp_build_tgsi_context *bld_base,
 				struct lp_build_emit_data *emit_data)
@@ -4062,7 +4037,7 @@ static void build_interp_intrinsic(const struct lp_build_tgsi_action *action,
 	if (inst->Instruction.Opcode == TGSI_OPCODE_INTERP_OFFSET ||
 	    inst->Instruction.Opcode == TGSI_OPCODE_INTERP_SAMPLE) {
 		LLVMValueRef ij_out[2];
-		LLVMValueRef ddxy_out = si_llvm_emit_ddxy_interp(bld_base, interp_param);
+		LLVMValueRef ddxy_out = ac_build_ddxy_interp(&ctx->ac, interp_param);
 
 		/*
 		 * take the I then J parameters, and the DDX/Y for it, and