radeonsi: stop using TGSI_OPCODE_CLAMP by moving it amd/common

Reviewed-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>

src/amd/common/ac_llvm_build.c

@@ -814,3 +814,17 @@ ac_emit_umsb(struct ac_llvm_context *ctx,
 					     LLVMConstInt(ctx->i32, 0, 0), ""),
 			       LLVMConstInt(ctx->i32, -1, true), msb, "");
 }
+
+LLVMValueRef ac_emit_clamp(struct ac_llvm_context *ctx, LLVMValueRef value)
+{
+	const char *intr = HAVE_LLVM >= 0x0308 ? "llvm.AMDGPU.clamp." :
+						 "llvm.AMDIL.clamp.";
+	LLVMValueRef args[3] = {
+		value,
+		LLVMConstReal(ctx->f32, 0),
+		LLVMConstReal(ctx->f32, 1),
+	};
+
+	return ac_emit_llvm_intrinsic(ctx, intr, ctx->f32, args, 3,
+				      AC_FUNC_ATTR_READNONE);
+}

src/amd/common/ac_llvm_build.h

@@ -190,6 +190,8 @@ LLVMValueRef ac_emit_umsb(struct ac_llvm_context *ctx,
 			  LLVMValueRef arg,
 			  LLVMTypeRef dst_type);
 
+LLVMValueRef ac_emit_clamp(struct ac_llvm_context *ctx, LLVMValueRef value);
+
 #ifdef __cplusplus
 }
 #endif

src/gallium/drivers/radeonsi/si_shader.c

@@ -1018,7 +1018,7 @@ static void store_output_tcs(struct lp_build_tgsi_context *bld_base,
 		LLVMValueRef value = dst[chan_index];
 
 		if (inst->Instruction.Saturate)
-			value = si_llvm_saturate(bld_base, value);
+			value = ac_emit_clamp(&ctx->ac, value);
 
 		lds_store(bld_base, chan_index, dw_addr, value);
 
@@ -1810,7 +1810,7 @@ static void si_llvm_init_export_args(struct lp_build_tgsi_context *bld_base,
 
 	case V_028714_SPI_SHADER_UNORM16_ABGR:
 		for (chan = 0; chan < 4; chan++) {
-			val[chan] = si_llvm_saturate(bld_base, values[chan]);
+			val[chan] = ac_emit_clamp(&ctx->ac, values[chan]);
 			val[chan] = LLVMBuildFMul(builder, val[chan],
 						  lp_build_const_float(gallivm, 65535), "");
 			val[chan] = LLVMBuildFAdd(builder, val[chan],
@@ -2688,7 +2688,7 @@ static void si_llvm_emit_vs_epilogue(struct lp_build_tgsi_context *bld_base)
 			for (j = 0; j < 4; j++) {
 				addr = ctx->outputs[i][j];
 				val = LLVMBuildLoad(gallivm->builder, addr, "");
-				val = si_llvm_saturate(bld_base, val);
+				val = ac_emit_clamp(&ctx->ac, val);
 				LLVMBuildStore(gallivm->builder, val, addr);
 			}
 		}
@@ -2834,7 +2834,7 @@ static void si_export_mrt_color(struct lp_build_tgsi_context *bld_base,
 	/* Clamp color */
 	if (ctx->shader->key.part.ps.epilog.clamp_color)
 		for (i = 0; i < 4; i++)
-			color[i] = si_llvm_saturate(bld_base, color[i]);
+			color[i] = ac_emit_clamp(&ctx->ac, color[i]);
 
 	/* Alpha to one */
 	if (ctx->shader->key.part.ps.epilog.alpha_to_one)
@@ -4357,7 +4357,7 @@ static void tex_fetch_args(
 		 * Z32_FLOAT, but we don't know that here.
 		 */
 		if (ctx->screen->b.chip_class == VI)
-			z = si_llvm_saturate(bld_base, z);
+			z = ac_emit_clamp(&ctx->ac, z);
 
 		address[count++] = z;
 	}

src/gallium/drivers/radeonsi/si_shader_internal.h

@@ -202,9 +202,6 @@ LLVMValueRef si_llvm_emit_fetch_64bit(struct lp_build_tgsi_context *bld_base,
 				      LLVMValueRef ptr,
 				      LLVMValueRef ptr2);
 
-LLVMValueRef si_llvm_saturate(struct lp_build_tgsi_context *bld_base,
-			      LLVMValueRef value);
-
 LLVMValueRef si_llvm_emit_fetch(struct lp_build_tgsi_context *bld_base,
 				const struct tgsi_full_src_register *reg,
 				enum tgsi_opcode_type type,

src/gallium/drivers/radeonsi/si_shader_tgsi_setup.c

@@ -952,21 +952,6 @@ static void emit_declaration(struct lp_build_tgsi_context *bld_base,
 	}
 }
 
-LLVMValueRef si_llvm_saturate(struct lp_build_tgsi_context *bld_base,
-			      LLVMValueRef value)
-{
-	struct lp_build_emit_data clamp_emit_data;
-
-	memset(&clamp_emit_data, 0, sizeof(clamp_emit_data));
-	clamp_emit_data.arg_count = 3;
-	clamp_emit_data.args[0] = value;
-	clamp_emit_data.args[2] = bld_base->base.one;
-	clamp_emit_data.args[1] = bld_base->base.zero;
-
-	return lp_build_emit_llvm(bld_base, TGSI_OPCODE_CLAMP,
-				  &clamp_emit_data);
-}
-
 void si_llvm_emit_store(struct lp_build_tgsi_context *bld_base,
 			const struct tgsi_full_instruction *inst,
 			const struct tgsi_opcode_info *info,
@@ -1003,7 +988,7 @@ void si_llvm_emit_store(struct lp_build_tgsi_context *bld_base,
 		if (tgsi_type_is_64bit(dtype) && (chan_index == 1 || chan_index == 3))
 			continue;
 		if (inst->Instruction.Saturate)
-			value = si_llvm_saturate(bld_base, value);
+			value = ac_emit_clamp(&ctx->ac, value);
 
 		if (reg->Register.File == TGSI_FILE_ADDRESS) {
 			temp_ptr = ctx->addrs[reg->Register.Index][chan_index];