2018-07-19  Michael Collison  <michael.collison@arm.com>
	    Richard Henderson <rth@redhat.com>

	* config/aarch64/aarch64.md (subv<GPI>4, usubv<GPI>4): New patterns.
	(subti): Handle op1 zero.
	(subvti4, usub4ti4): New.
	(*sub<GPI>3_compare1_imm): New.
	(sub<GPI>3_carryinCV): New.
	(*sub<GPI>3_carryinCV_z1_z2, *sub<GPI>3_carryinCV_z1): New.
	(*sub<GPI>3_carryinCV_z2, *sub<GPI>3_carryinCV): New.

2018-07-19  Michael Collison  <michael.collison@arm.com>
	    Richard Henderson <rth@redhat.com>

	* config/aarch64/aarch64.md: (addv<GPI>4, uaddv<GPI>4): New.
	(addti3): Create simpler code if low part is already known to be 0.
	(addvti4, uaddvti4): New.
	(*add<GPI>3_compareC_cconly_imm): New.
	(*add<GPI>3_compareC_cconly): New.
	(*add<GPI>3_compareC_imm): New.
	(*add<GPI>3_compareC): Rename from add<GPI>3_compare1; do not
	handle constants within this pattern..
	(*add<GPI>3_compareV_cconly_imm): New.
	(*add<GPI>3_compareV_cconly): New.
	(*add<GPI>3_compareV_imm): New.
	(add<GPI>3_compareV): New.
	(add<GPI>3_carryinC, add<GPI>3_carryinV): New.
	(*add<GPI>3_carryinC_zero, *add<GPI>3_carryinV_zero): New.
	(*add<GPI>3_carryinC, *add<GPI>3_carryinV): New.
	((*add<GPI>3_compareC_cconly_imm): Replace 'ne' operator
	with 'comparison' operator.
	(*add<GPI>3_compareV_cconly_imm): Ditto.
	(*add<GPI>3_compareV_cconly): Ditto.
	(*add<GPI>3_compareV_imm): Ditto.
	(add<GPI>3_compareV): Ditto.
	(add<mode>3_carryinC): Ditto.
	(*add<mode>3_carryinC_zero): Ditto.
	(*add<mode>3_carryinC): Ditto.
	(add<mode>3_carryinV): Ditto.
	(*add<mode>3_carryinV_zero): Ditto.
	(*add<mode>3_carryinV): Ditto.

2018-07-19  Michael Collison  <michael.collison@arm.com>
	    Richard Henderson <rth@redhat.com>

	* config/aarch64/aarch64-modes.def (CC_V): New.
	* config/aarch64/aarch64-protos.h
	(aarch64_addti_scratch_regs): Declare
	(aarch64_subvti_scratch_regs): Declare.
	(aarch64_expand_subvti): Declare.
	(aarch64_gen_unlikely_cbranch): Declare
	* config/aarch64/aarch64.c (aarch64_select_cc_mode): Test
	for signed overflow using CC_Vmode.
	(aarch64_get_condition_code_1): Handle CC_Vmode.
	(aarch64_gen_unlikely_cbranch): New function.
	(aarch64_addti_scratch_regs): New function.
	(aarch64_subvti_scratch_regs): New function.
	(aarch64_expand_subvti): New function.

2018-07-19  Michael Collison  <michael.collison@arm.com>
	    Richard Henderson <rth@redhat.com>

	* gcc.target/aarch64/builtin_sadd_128.c: New testcase.
	* gcc.target/aarch64/builtin_saddl.c: New testcase.
	* gcc.target/aarch64/builtin_saddll.c: New testcase.
	* gcc.target/aarch64/builtin_uadd_128.c: New testcase.
	* gcc.target/aarch64/builtin_uaddl.c: New testcase.
	* gcc.target/aarch64/builtin_uaddll.c: New testcase.
	* gcc.target/aarch64/builtin_ssub_128.c: New testcase.
	* gcc.target/aarch64/builtin_ssubl.c: New testcase.
	* gcc.target/aarch64/builtin_ssubll.c: New testcase.
	* gcc.target/aarch64/builtin_usub_128.c: New testcase.
	* gcc.target/aarch64/builtin_usubl.c: New testcase.
	* gcc.target/aarch64/builtin_usubll.c: New testcase.


Co-Authored-By: Richard Henderson <rth@redhat.com>

From-SVN: r262890