[ARM][GCC][2/x]: MVE ACLE intrinsics framework patch.

This patch is part of MVE ACLE intrinsics framework.
This patches add support to update (read/write) the APSR (Application Program Status Register)
register and FPSCR (Floating-point Status and Control Register) register for MVE.
This patch also enables thumb2 mov RTL patterns for MVE.

A new feature bit vfp_base is added. This bit is enabled for all VFP, MVE and MVE with floating point
extensions. This bit is used to enable the macro TARGET_VFP_BASE. For all the VFP instructions, RTL patterns,
status and control registers are guarded by TARGET_HAVE_FLOAT. But this patch modifies that and the
common instructions, RTL patterns, status and control registers bewteen MVE and VFP are guarded by
TARGET_VFP_BASE macro.

The RTL pattern set_fpscr and get_fpscr are updated to use VFPCC_REGNUM because few MVE intrinsics
set/get carry bit of FPSCR register.

Please refer to Arm reference manual [1] for more details.
[1] https://developer.arm.com/docs/ddi0553/latest

2020-03-16  Andre Vieira  <andre.simoesdiasvieira@arm.com>
	    Mihail Ionescu  <mihail.ionescu@arm.com>
	    Srinath Parvathaneni  <srinath.parvathaneni@arm.com>

	* common/config/arm/arm-common.c (arm_asm_auto_mfpu): When vfp_base
	feature bit is on and -mfpu=auto is passed as compiler option, do not
	generate error on not finding any matching fpu. Because in this case
	fpu is not required.
	* config/arm/arm-cpus.in (vfp_base): Define feature bit, this bit is
	enabled for MVE and also for all VFP extensions.
	(VFPv2): Modify fgroup to enable vfp_base feature bit when ever VFPv2
	is enabled.
	(MVE): Define fgroup to enable feature bits mve, vfp_base and armv7em.
	(MVE_FP): Define fgroup to enable feature bits is fgroup MVE and FPv5
	along with feature bits mve_float.
	(mve): Modify add options in armv8.1-m.main arch for MVE.
	(mve.fp): Modify add options in armv8.1-m.main arch for MVE with
	floating point.
	* config/arm/arm.c (use_return_insn): Replace the
	check with TARGET_VFP_BASE.
	(thumb2_legitimate_index_p): Replace TARGET_HARD_FLOAT with
	TARGET_VFP_BASE.
	(arm_rtx_costs_internal): Replace "TARGET_HARD_FLOAT || TARGET_HAVE_MVE"
	with TARGET_VFP_BASE, to allow cost calculations for copies in MVE as
	well.
	(arm_get_vfp_saved_size): Replace TARGET_HARD_FLOAT with
	TARGET_VFP_BASE, to allow space calculation for VFP registers in MVE
	as well.
	(arm_compute_frame_layout): Likewise.
	(arm_save_coproc_regs): Likewise.
	(arm_fixed_condition_code_regs): Modify to enable using VFPCC_REGNUM
	in MVE as well.
	(arm_hard_regno_mode_ok): Replace "TARGET_HARD_FLOAT || TARGET_HAVE_MVE"
	with equivalent macro TARGET_VFP_BASE.
	(arm_expand_epilogue_apcs_frame): Likewise.
	(arm_expand_epilogue): Likewise.
	(arm_conditional_register_usage): Likewise.
	(arm_declare_function_name): Add check to skip printing .fpu directive
	in assembly file when TARGET_VFP_BASE is enabled and fpu_to_print is
	"softvfp".
	* config/arm/arm.h (TARGET_VFP_BASE): Define.
	* config/arm/arm.md (arch): Add "mve" to arch.
	(eq_attr "arch" "mve"): Enable on TARGET_HAVE_MVE is true.
	(vfp_pop_multiple_with_writeback): Replace "TARGET_HARD_FLOAT
	|| TARGET_HAVE_MVE" with equivalent macro TARGET_VFP_BASE.
	* config/arm/constraints.md (Uf): Define to allow modification to FPCCR
	in MVE.
	* config/arm/thumb2.md (thumb2_movsfcc_soft_insn): Modify target guard
	to not allow for MVE.
	* config/arm/unspecs.md (UNSPEC_GET_FPSCR): Move to volatile unspecs
	enum.
	(VUNSPEC_GET_FPSCR): Define.
	* config/arm/vfp.md (thumb2_movhi_vfp): Add support for VMSR and VMRS
	instructions which move to general-purpose Register from Floating-point
	Special register and vice-versa.
	(thumb2_movhi_fp16): Likewise.
	(thumb2_movsi_vfp): Add support for VMSR and VMRS instructions along
	with MCR and MRC instructions which set and get Floating-point Status
	and Control Register (FPSCR).
	(movdi_vfp): Modify pattern to enable Single-precision scalar float move
	in MVE.
	(thumb2_movdf_vfp): Modify pattern to enable Double-precision scalar
	float move patterns in MVE.
	(thumb2_movsfcc_vfp): Modify pattern to enable single float conditional
	code move patterns of VFP also in MVE by adding TARGET_VFP_BASE check.
	(thumb2_movdfcc_vfp): Modify pattern to enable double float conditional
	code move patterns of VFP also in MVE by adding TARGET_VFP_BASE check.
	(push_multi_vfp): Add support to use VFP VPUSH pattern for MVE by adding
	TARGET_VFP_BASE check.
	(set_fpscr): Add support to set FPSCR register for MVE. Modify pattern
	using VFPCC_REGNUM as few MVE intrinsics use carry bit of FPSCR
	register.
	(get_fpscr): Add support to get FPSCR register for MVE. Modify pattern
		using VFPCC_REGNUM as few MVE intrinsics use carry bit of FPSCR
	register.

2020-03-16  Srinath Parvathaneni  <srinath.parvathaneni@arm.com>

	* gcc.target/arm/mve/intrinsics/mve_fp_fpu1.c: New test.
	* gcc.target/arm/mve/intrinsics/mve_fp_fpu2.c: Likewise.
	* gcc.target/arm/mve/intrinsics/mve_fpu1.c: Likewise.
	* gcc.target/arm/mve/intrinsics/mve_fpu2.c: Likewise.
	* gcc.target/arm/mve/intrinsics/mve_fpu3.c: Likewise.

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index e814da1..ec4e4e7 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -2,6 +2,83 @@
             Mihail Ionescu  <mihail.ionescu@arm.com>
             Srinath Parvathaneni  <srinath.parvathaneni@arm.com>
 
+       * common/config/arm/arm-common.c (arm_asm_auto_mfpu): When vfp_base
+       feature bit is on and -mfpu=auto is passed as compiler option, do not
+       generate error on not finding any matching fpu. Because in this case
+       fpu is not required.
+       * config/arm/arm-cpus.in (vfp_base): Define feature bit, this bit is
+       enabled for MVE and also for all VFP extensions.
+       (VFPv2): Modify fgroup to enable vfp_base feature bit when ever VFPv2
+       is enabled.
+       (MVE): Define fgroup to enable feature bits mve, vfp_base and armv7em.
+       (MVE_FP): Define fgroup to enable feature bits is fgroup MVE and FPv5
+       along with feature bits mve_float.
+       (mve): Modify add options in armv8.1-m.main arch for MVE.
+       (mve.fp): Modify add options in armv8.1-m.main arch for MVE with
+       floating point.
+       * config/arm/arm.c (use_return_insn): Replace the
+       check with TARGET_VFP_BASE.
+       (thumb2_legitimate_index_p): Replace TARGET_HARD_FLOAT with
+       TARGET_VFP_BASE.
+       (arm_rtx_costs_internal): Replace "TARGET_HARD_FLOAT || TARGET_HAVE_MVE"
+       with TARGET_VFP_BASE, to allow cost calculations for copies in MVE as
+       well.
+       (arm_get_vfp_saved_size): Replace TARGET_HARD_FLOAT with
+       TARGET_VFP_BASE, to allow space calculation for VFP registers in MVE
+       as well.
+       (arm_compute_frame_layout): Likewise.
+       (arm_save_coproc_regs): Likewise.
+       (arm_fixed_condition_code_regs): Modify to enable using VFPCC_REGNUM
+       in MVE as well.
+       (arm_hard_regno_mode_ok): Replace "TARGET_HARD_FLOAT || TARGET_HAVE_MVE"
+       with equivalent macro TARGET_VFP_BASE.
+       (arm_expand_epilogue_apcs_frame): Likewise.
+       (arm_expand_epilogue): Likewise.
+       (arm_conditional_register_usage): Likewise.
+       (arm_declare_function_name): Add check to skip printing .fpu directive
+       in assembly file when TARGET_VFP_BASE is enabled and fpu_to_print is
+       "softvfp".
+       * config/arm/arm.h (TARGET_VFP_BASE): Define.
+       * config/arm/arm.md (arch): Add "mve" to arch.
+       (eq_attr "arch" "mve"): Enable on TARGET_HAVE_MVE is true.
+       (vfp_pop_multiple_with_writeback): Replace "TARGET_HARD_FLOAT
+       || TARGET_HAVE_MVE" with equivalent macro TARGET_VFP_BASE.
+       * config/arm/constraints.md (Uf): Define to allow modification to FPCCR
+       in MVE.
+       * config/arm/thumb2.md (thumb2_movsfcc_soft_insn): Modify target guard
+       to not allow for MVE.
+       * config/arm/unspecs.md (UNSPEC_GET_FPSCR): Move to volatile unspecs
+       enum.
+       (VUNSPEC_GET_FPSCR): Define.
+       * config/arm/vfp.md (thumb2_movhi_vfp): Add support for VMSR and VMRS
+       instructions which move to general-purpose Register from Floating-point
+       Special register and vice-versa.
+       (thumb2_movhi_fp16): Likewise.
+       (thumb2_movsi_vfp): Add support for VMSR and VMRS instructions along
+       with MCR and MRC instructions which set and get Floating-point Status
+       and Control Register (FPSCR).
+       (movdi_vfp): Modify pattern to enable Single-precision scalar float move
+       in MVE.
+       (thumb2_movdf_vfp): Modify pattern to enable Double-precision scalar
+       float move patterns in MVE.
+       (thumb2_movsfcc_vfp): Modify pattern to enable single float conditional
+       code move patterns of VFP also in MVE by adding TARGET_VFP_BASE check.
+       (thumb2_movdfcc_vfp): Modify pattern to enable double float conditional
+       code move patterns of VFP also in MVE by adding TARGET_VFP_BASE check.
+       (push_multi_vfp): Add support to use VFP VPUSH pattern for MVE by adding
+       TARGET_VFP_BASE check.
+       (set_fpscr): Add support to set FPSCR register for MVE. Modify pattern
+       using VFPCC_REGNUM as few MVE intrinsics use carry bit of FPSCR
+       register.
+       (get_fpscr): Add support to get FPSCR register for MVE. Modify pattern
+       using VFPCC_REGNUM as few MVE intrinsics use carry bit of FPSCR
+       register.
+
+
+2020-03-16  Andre Vieira  <andre.simoesdiasvieira@arm.com>
+            Mihail Ionescu  <mihail.ionescu@arm.com>
+            Srinath Parvathaneni  <srinath.parvathaneni@arm.com>
+
        * config.gcc (arm_mve.h): Include mve intrinsics header file.
        * config/arm/aout.h (p0): Add new register name for MVE predicated
        cases.

diff --git a/gcc/common/config/arm/arm-common.c b/gcc/common/config/arm/arm-common.c
index 30a2a1d..78a779c 100644 (file)
--- a/gcc/common/config/arm/arm-common.c
+++ b/gcc/common/config/arm/arm-common.c
@@ -1009,7 +1009,8 @@ arm_asm_auto_mfpu (int argc, const char **argv)
            }
        }
 
-      gcc_assert (i != TARGET_FPU_auto);
+      gcc_assert (i != TARGET_FPU_auto
+                 || bitmap_bit_p (target_isa, isa_bit_vfp_base));
     }
 
   auto_fpu = (char *) xmalloc (strlen (fpuname) + sizeof ("-mfpu="));

diff --git a/gcc/config/arm/arm-cpus.in b/gcc/config/arm/arm-cpus.in
index 96f584d..77b4309 100644 (file)
--- a/gcc/config/arm/arm-cpus.in
+++ b/gcc/config/arm/arm-cpus.in
@@ -135,6 +135,10 @@ define feature armv8_1m_main
 # Floating point and Neon extensions.
 # VFPv1 is not supported in GCC.
 
+# This feature bit is enabled for all VFP, MVE and
+# MVE with floating point extensions.
+define feature vfp_base
+
 # Vector floating point v2.
 define feature vfpv2
 
@@ -234,7 +238,7 @@ define fgroup ALL_SIMD      ALL_SIMD_INTERNAL ALL_SIMD_EXTERNAL
 
 # List of all FPU bits to strip out if -mfpu is used to override the
 # default.  fp16 is deliberately missing from this list.
-define fgroup ALL_FPU_INTERNAL vfpv2 vfpv3 vfpv4 fpv5 fp16conv fp_dbl ALL_SIMD_INTERNAL
+define fgroup ALL_FPU_INTERNAL vfp_base vfpv2 vfpv3 vfpv4 fpv5 fp16conv fp_dbl ALL_SIMD_INTERNAL
 # Similarly, but including fp16 and other extensions that aren't part of
 # -mfpu support.
 define fgroup ALL_FPU_EXTERNAL fp16 bf16
@@ -279,10 +283,12 @@ define fgroup ARMv8r      ARMv8a
 define fgroup ARMv8_1m_main ARMv8m_main armv8_1m_main
 
 # Useful combinations.
-define fgroup VFPv2    vfpv2
+define fgroup VFPv2    vfp_base vfpv2
 define fgroup VFPv3    VFPv2 vfpv3
 define fgroup VFPv4    VFPv3 vfpv4 fp16conv
 define fgroup FPv5     VFPv4 fpv5
+define fgroup MVE      mve vfp_base armv7em
+define fgroup MVE_FP   MVE FPv5 fp16 mve_float
 
 define fgroup FP_DBL   fp_dbl
 define fgroup FP_D32   FP_DBL fp_d32
@@ -699,8 +705,8 @@ begin arch armv8.1-m.main
  option fp add FPv5 fp16
  option fp.dp add FPv5 FP_DBL fp16
  option nofp remove ALL_FP
- option mve add mve armv7em
- option mve.fp add mve FPv5 fp16 mve_float armv7em
+ option mve add MVE
+ option mve.fp add MVE_FP
 end arch armv8.1-m.main
 
 begin arch iwmmxt

diff --git a/gcc/config/arm/arm.c b/gcc/config/arm/arm.c
index c769104..b40904a 100644 (file)
--- a/gcc/config/arm/arm.c
+++ b/gcc/config/arm/arm.c
@@ -4295,7 +4295,7 @@ use_return_insn (int iscond, rtx sibling)
 
   /* Can't be done if any of the VFP regs are pushed,
      since this also requires an insn.  */
-  if (TARGET_HARD_FLOAT || TARGET_HAVE_MVE)
+  if (TARGET_VFP_BASE)
     for (regno = FIRST_VFP_REGNUM; regno <= LAST_VFP_REGNUM; regno++)
       if (df_regs_ever_live_p (regno) && !call_used_or_fixed_reg_p (regno))
        return 0;
@@ -6289,7 +6289,7 @@ use_vfp_abi (enum arm_pcs pcs_variant, bool is_double)
     return false;
 
   return (TARGET_32BIT && TARGET_HARD_FLOAT &&
-         (TARGET_VFP_DOUBLE || !is_double));
+        (TARGET_VFP_DOUBLE || !is_double));
 }
 
 /* Return true if an argument whose type is TYPE, or mode is MODE, is
@@ -8512,7 +8512,7 @@ thumb2_legitimate_index_p (machine_mode mode, rtx index, int strict_p)
 
   /* ??? Combine arm and thumb2 coprocessor addressing modes.  */
   /* Standard coprocessor addressing modes.  */
-  if (TARGET_HARD_FLOAT
+  if (TARGET_VFP_BASE
       && (mode == SFmode || mode == DFmode))
     return (code == CONST_INT && INTVAL (index) < 1024
            /* Thumb-2 allows only > -256 index range for it's core register
@@ -9905,7 +9905,7 @@ arm_rtx_costs_internal (rtx x, enum rtx_code code, enum rtx_code outer_code,
          /* Assume that most copies can be done with a single insn,
             unless we don't have HW FP, in which case everything
             larger than word mode will require two insns.  */
-         *cost = COSTS_N_INSNS (((!(TARGET_HARD_FLOAT || TARGET_HAVE_MVE)
+         *cost = COSTS_N_INSNS (((!TARGET_VFP_BASE
                                   && GET_MODE_SIZE (mode) > 4)
                                  || mode == DImode)
                                 ? 2 : 1);
@@ -20821,7 +20821,7 @@ arm_get_vfp_saved_size (void)
 
   saved = 0;
   /* Space for saved VFP registers.  */
-  if (TARGET_HARD_FLOAT)
+  if (TARGET_VFP_BASE)
     {
       count = 0;
       for (regno = FIRST_VFP_REGNUM;
@@ -22364,7 +22364,7 @@ arm_compute_frame_layout (void)
       func_type = arm_current_func_type ();
       /* Space for saved VFP registers.  */
       if (! IS_VOLATILE (func_type)
-         && (TARGET_HARD_FLOAT || TARGET_HAVE_MVE))
+         && TARGET_VFP_BASE)
        saved += arm_get_vfp_saved_size ();
 
       /* Allocate space for saving/restoring FPCXTNS in Armv8.1-M Mainline
@@ -22588,7 +22588,7 @@ arm_save_coproc_regs(void)
        saved_size += 8;
       }
 
-  if (TARGET_HARD_FLOAT || TARGET_HAVE_MVE)
+  if (TARGET_VFP_BASE)
     {
       start_reg = FIRST_VFP_REGNUM;
 
@@ -24546,7 +24546,7 @@ arm_fixed_condition_code_regs (unsigned int *p1, unsigned int *p2)
     return false;
 
   *p1 = CC_REGNUM;
-  *p2 = TARGET_HARD_FLOAT ? VFPCC_REGNUM : INVALID_REGNUM;
+  *p2 = TARGET_VFP_BASE ? VFPCC_REGNUM : INVALID_REGNUM;
   return true;
 }
 
@@ -24965,7 +24965,7 @@ arm_hard_regno_mode_ok (unsigned int regno, machine_mode mode)
 {
   if (GET_MODE_CLASS (mode) == MODE_CC)
     return (regno == CC_REGNUM
-           || ((TARGET_HARD_FLOAT || TARGET_HAVE_MVE)
+           || (TARGET_VFP_BASE
                && regno == VFPCC_REGNUM));
 
   if (regno == CC_REGNUM && GET_MODE_CLASS (mode) != MODE_CC)
@@ -24982,7 +24982,7 @@ arm_hard_regno_mode_ok (unsigned int regno, machine_mode mode)
        start of an even numbered register pair.  */
     return (ARM_NUM_REGS (mode) < 2) || (regno < LAST_LO_REGNUM);
 
-  if ((TARGET_HARD_FLOAT || TARGET_HAVE_MVE) && IS_VFP_REGNUM (regno))
+  if (TARGET_VFP_BASE && IS_VFP_REGNUM (regno))
     {
       if (mode == DFmode)
        return VFP_REGNO_OK_FOR_DOUBLE (regno);
@@ -26933,7 +26933,7 @@ arm_expand_epilogue_apcs_frame (bool really_return)
         floats_from_frame += 4;
       }
 
-  if (TARGET_HARD_FLOAT || TARGET_HAVE_MVE)
+  if (TARGET_VFP_BASE)
     {
       int start_reg;
       rtx ip_rtx = gen_rtx_REG (SImode, IP_REGNUM);
@@ -27179,7 +27179,7 @@ arm_expand_epilogue (bool really_return)
         }
     }
 
-  if (TARGET_HARD_FLOAT || TARGET_HAVE_MVE)
+  if (TARGET_VFP_BASE)
     {
       /* Generate VFP register multi-pop.  */
       int end_reg = LAST_VFP_REGNUM + 1;
@@ -29699,7 +29699,7 @@ arm_conditional_register_usage (void)
   if (TARGET_THUMB1)
     fixed_regs[LR_REGNUM] = call_used_regs[LR_REGNUM] = 1;
 
-  if (TARGET_32BIT && (TARGET_HARD_FLOAT || TARGET_HAVE_MVE))
+  if (TARGET_32BIT && TARGET_VFP_BASE)
     {
       /* VFPv3 registers are disabled when earlier VFP
         versions are selected due to the definition of
@@ -32478,7 +32478,8 @@ arm_declare_function_name (FILE *stream, const char *name, tree decl)
     = TARGET_SOFT_FLOAT
        ? "softvfp" : arm_identify_fpu_from_isa (arm_active_target.isa);
 
-  if (fpu_to_print != arm_last_printed_arch_string)
+  if (!(!strcmp (fpu_to_print.c_str (), "softvfp") && TARGET_VFP_BASE)
+      && (fpu_to_print != arm_last_printed_arch_string))
     {
       asm_fprintf (asm_out_file, "\t.fpu %s\n", fpu_to_print.c_str ());
       arm_last_printed_fpu_string = fpu_to_print;

diff --git a/gcc/config/arm/arm.h b/gcc/config/arm/arm.h
index a0283ed..c745341 100644 (file)
--- a/gcc/config/arm/arm.h
+++ b/gcc/config/arm/arm.h
@@ -334,6 +334,19 @@ emission of floating point pcs attributes.  */
                                                isa_bit_mve_float) \
                               && !TARGET_GENERAL_REGS_ONLY)
 
+/* MVE have few common instructions as VFP, like VLDM alias VPOP, VLDR, VSTM
+   alia VPUSH, VSTR and VMOV, VMSR and VMRS.  In the same manner it updates few
+   registers such as FPCAR, FPCCR, FPDSCR, FPSCR, MVFR0, MVFR1 and MVFR2.  All
+   the VFP instructions, RTL patterns and register are guarded by
+   TARGET_HARD_FLOAT.  But the common instructions, RTL pattern and registers
+   between MVE and VFP will be guarded by the following macro TARGET_VFP_BASE
+   hereafter.  */
+
+#define TARGET_VFP_BASE (arm_float_abi != ARM_FLOAT_ABI_SOFT \
+                        && bitmap_bit_p (arm_active_target.isa, \
+                                         isa_bit_vfp_base) \
+                        && !TARGET_GENERAL_REGS_ONLY)
+
 /* Nonzero if integer division instructions supported.  */
 #define TARGET_IDIV    ((TARGET_ARM && arm_arch_arm_hwdiv)     \
                         || (TARGET_THUMB && arm_arch_thumb_hwdiv))

diff --git a/gcc/config/arm/arm.md b/gcc/config/arm/arm.md
index 8f8c91d..5387f97 100644 (file)
--- a/gcc/config/arm/arm.md
+++ b/gcc/config/arm/arm.md
@@ -134,7 +134,7 @@
 ; arm_arch6.  "v6t2" for Thumb-2 with arm_arch6 and "v8mb" for ARMv8-M
 ; Baseline.  This attribute is used to compute attribute "enabled",
 ; use type "any" to enable an alternative in all cases.
-(define_attr "arch" "any,a,t,32,t1,t2,v6,nov6,v6t2,v8mb,iwmmxt,iwmmxt2,armv6_or_vfpv3,neon"
+(define_attr "arch" "any,a,t,32,t1,t2,v6,nov6,v6t2,v8mb,iwmmxt,iwmmxt2,armv6_or_vfpv3,neon,mve"
   (const_string "any"))
 
 (define_attr "arch_enabled" "no,yes"
@@ -188,6 +188,10 @@
         (and (eq_attr "arch" "neon")
              (match_test "TARGET_NEON"))
         (const_string "yes")
+
+        (and (eq_attr "arch" "mve")
+             (match_test "TARGET_HAVE_MVE"))
+        (const_string "yes")
        ]
 
        (const_string "no")))
@@ -11758,7 +11762,7 @@
                    (match_operand:SI 2 "const_int_I_operand" "I")))
      (set (match_operand:DF 3 "vfp_hard_register_operand" "")
           (mem:DF (match_dup 1)))])]
-  "TARGET_32BIT && (TARGET_HARD_FLOAT || TARGET_HAVE_MVE)"
+  "TARGET_32BIT && TARGET_VFP_BASE"
   "*
   {
     int num_regs = XVECLEN (operands[0], 0);

diff --git a/gcc/config/arm/constraints.md b/gcc/config/arm/constraints.md
index a12de97..bf8f4ff 100644 (file)
--- a/gcc/config/arm/constraints.md
+++ b/gcc/config/arm/constraints.md
@@ -38,7 +38,7 @@
 ;; in all states: Pf, Pg
 
 ;; The following memory constraints have been used:
-;; in ARM/Thumb-2 state: Uh, Ut, Uv, Uy, Un, Um, Us, Up
+;; in ARM/Thumb-2 state: Uh, Ut, Uv, Uy, Un, Um, Us, Up, Uf
 ;; in ARM state: Uq
 ;; in Thumb state: Uu, Uw
 ;; in all states: Q
@@ -46,6 +46,9 @@
 (define_register_constraint "Up" "TARGET_HAVE_MVE ? VPR_REG : NO_REGS"
   "MVE VPR register")
 
+(define_register_constraint "Uf" "TARGET_HAVE_MVE ? VFPCC_REG : NO_REGS"
+  "MVE FPCCR register")
+
 (define_register_constraint "t" "TARGET_32BIT ? VFP_LO_REGS : NO_REGS"
  "The VFP registers @code{s0}-@code{s31}.")
 

diff --git a/gcc/config/arm/thumb2.md b/gcc/config/arm/thumb2.md
index b0d3bd1..793f670 100644 (file)
--- a/gcc/config/arm/thumb2.md
+++ b/gcc/config/arm/thumb2.md
@@ -517,7 +517,7 @@
                          [(match_operand 4 "cc_register" "") (const_int 0)])
                         (match_operand:SF 1 "s_register_operand" "0,r")
                         (match_operand:SF 2 "s_register_operand" "r,0")))]
-  "TARGET_THUMB2 && TARGET_SOFT_FLOAT"
+  "TARGET_THUMB2 && TARGET_SOFT_FLOAT && !TARGET_HAVE_MVE"
   "@
    it\\t%D3\;mov%D3\\t%0, %2
    it\\t%d3\;mov%d3\\t%0, %1"

diff --git a/gcc/config/arm/unspecs.md b/gcc/config/arm/unspecs.md
index f0b1f46..e76609f 100644 (file)
--- a/gcc/config/arm/unspecs.md
+++ b/gcc/config/arm/unspecs.md
@@ -170,6 +170,7 @@
   UNSPEC_TORC          ; Used by the intrinsic form of the iWMMXt TORC instruction.
   UNSPEC_TORVSC                ; Used by the intrinsic form of the iWMMXt TORVSC instruction.
   UNSPEC_TEXTRC                ; Used by the intrinsic form of the iWMMXt TEXTRC instruction.
+  UNSPEC_GET_FPSCR     ; Represent fetch of FPSCR content.
 ])
 
 
@@ -216,7 +217,6 @@
   VUNSPEC_SLX          ; Represent a store-register-release-exclusive.
   VUNSPEC_LDA          ; Represent a store-register-acquire.
   VUNSPEC_STL          ; Represent a store-register-release.
-  VUNSPEC_GET_FPSCR    ; Represent fetch of FPSCR content.
   VUNSPEC_SET_FPSCR    ; Represent assign of FPSCR content.
   VUNSPEC_PROBE_STACK_RANGE ; Represent stack range probing.
   VUNSPEC_CDP          ; Represent the coprocessor cdp instruction.

diff --git a/gcc/config/arm/vfp.md b/gcc/config/arm/vfp.md
index ab16a6b..eb6ae7b 100644 (file)
--- a/gcc/config/arm/vfp.md
+++ b/gcc/config/arm/vfp.md
@@ -74,10 +74,10 @@
 (define_insn "*thumb2_movhi_vfp"
  [(set
    (match_operand:HI 0 "nonimmediate_operand"
-    "=rk, r, l, r, m, r, *t, r, *t")
+    "=rk, r, l, r, m, r, *t, r, *t, Up, r")
    (match_operand:HI 1 "general_operand"
-    "rk, I, Py, n, r, m, r, *t, *t"))]
- "TARGET_THUMB2 && TARGET_HARD_FLOAT
+    "rk, I, Py, n, r, m, r, *t, *t, r, Up"))]
+ "TARGET_THUMB2 && TARGET_VFP_BASE
   && !TARGET_VFP_FP16INST
   && (register_operand (operands[0], HImode)
        || register_operand (operands[1], HImode))"
@@ -99,20 +99,24 @@
       return "vmov%?\t%0, %1\t%@ int";
     case 8:
       return "vmov%?.f32\t%0, %1\t%@ int";
+    case 9:
+      return "vmsr%?\t P0, %1\t@ movhi";
+    case 10:
+      return "vmrs%?\t %0, P0\t@ movhi";
     default:
       gcc_unreachable ();
     }
 }
  [(set_attr "predicable" "yes")
   (set_attr "predicable_short_it"
-   "yes, no, yes, no, no, no, no, no, no")
+   "yes, no, yes, no, no, no, no, no, no, no, no")
   (set_attr "type"
    "mov_reg, mov_imm, mov_imm, mov_imm, store_4, load_4,\
-    f_mcr, f_mrc, fmov")
-  (set_attr "arch" "*, *, *, v6t2, *, *, *, *, *")
-  (set_attr "pool_range" "*, *, *, *, *, 4094, *, *, *")
-  (set_attr "neg_pool_range" "*, *, *, *, *, 250, *, *, *")
-  (set_attr "length" "2, 4, 2, 4, 4, 4, 4, 4, 4")]
+    f_mcr, f_mrc, fmov, mve_move, mve_move")
+  (set_attr "arch" "*, *, *, v6t2, *, *, *, *, *, mve, mve")
+  (set_attr "pool_range" "*, *, *, *, *, 4094, *, *, *, *, *")
+  (set_attr "neg_pool_range" "*, *, *, *, *, 250, *, *, *, *, *")
+  (set_attr "length" "2, 4, 2, 4, 4, 4, 4, 4, 4, 4, 4")]
 )
 
 ;; Patterns for HI moves which provide more data transfer instructions when FP16
@@ -170,10 +174,10 @@
 (define_insn "*thumb2_movhi_fp16"
  [(set
    (match_operand:HI 0 "nonimmediate_operand"
-    "=rk, r, l, r, m, r, *t, r, *t")
+    "=rk, r, l, r, m, r, *t, r, *t, Up, r")
    (match_operand:HI 1 "general_operand"
-    "rk, I, Py, n, r, m, r, *t, *t"))]
- "TARGET_THUMB2 && TARGET_VFP_FP16INST
+    "rk, I, Py, n, r, m, r, *t, *t, r, Up"))]
+ "TARGET_THUMB2 && (TARGET_VFP_FP16INST || TARGET_HAVE_MVE)
   && (register_operand (operands[0], HImode)
        || register_operand (operands[1], HImode))"
 {
@@ -194,21 +198,25 @@
       return "vmov.f16\t%0, %1\t%@ int";
     case 8:
       return "vmov%?.f32\t%0, %1\t%@ int";
+    case 9:
+      return "vmsr%?\tP0, %1\t%@ movhi";
+    case 10:
+      return "vmrs%?\t%0, P0\t%@ movhi";
     default:
       gcc_unreachable ();
     }
 }
  [(set_attr "predicable"
-   "yes, yes, yes, yes, yes, yes, no, no, yes")
+   "yes, yes, yes, yes, yes, yes, no, no, yes, yes, yes")
   (set_attr "predicable_short_it"
-   "yes, no, yes, no, no, no, no, no, no")
+   "yes, no, yes, no, no, no, no, no, no, no, no")
   (set_attr "type"
    "mov_reg, mov_imm, mov_imm, mov_imm, store_4, load_4,\
-    f_mcr, f_mrc, fmov")
-  (set_attr "arch" "*, *, *, v6t2, *, *, *, *, *")
-  (set_attr "pool_range" "*, *, *, *, *, 4094, *, *, *")
-  (set_attr "neg_pool_range" "*, *, *, *, *, 250, *, *, *")
-  (set_attr "length" "2, 4, 2, 4, 4, 4, 4, 4, 4")]
+    f_mcr, f_mrc, fmov, mve_move, mve_move")
+  (set_attr "arch" "*, *, *, v6t2, *, *, *, *, *, mve, mve")
+  (set_attr "pool_range" "*, *, *, *, *, 4094, *, *, *, *, *")
+  (set_attr "neg_pool_range" "*, *, *, *, *, 250, *, *, *, *, *")
+  (set_attr "length" "2, 4, 2, 4, 4, 4, 4, 4, 4, 4, 4")]
 )
 
 ;; SImode moves
@@ -258,9 +266,11 @@
 ;; is chosen with length 2 when the instruction is predicated for
 ;; arm_restrict_it.
 (define_insn "*thumb2_movsi_vfp"
-  [(set (match_operand:SI 0 "nonimmediate_operand" "=rk,r,l,r,r,lk*r,m,*t, r,*t,*t,  *Uv")
-       (match_operand:SI 1 "general_operand"      "rk,I,Py,K,j,mi,lk*r, r,*t,*t,*UvTu,*t"))]
-  "TARGET_THUMB2 && TARGET_HARD_FLOAT
+  [(set (match_operand:SI 0 "nonimmediate_operand" "=rk,r,l,r,r,l,*hk,m,*m,*t,\
+                                                   r,*t,*t,*Uv, Up, r,Uf,r")
+       (match_operand:SI 1 "general_operand" "rk,I,Py,K,j,mi,*mi,l,*hk,r,*t,\
+                                              *t,*UvTu,*t, r, Up,r,Uf"))]
+  "TARGET_THUMB2 && TARGET_VFP_BASE
    && (   s_register_operand (operands[0], SImode)
        || s_register_operand (operands[1], SImode))"
   "*
@@ -275,30 +285,44 @@
     case 4:
       return \"movw%?\\t%0, %1\";
     case 5:
+    case 6:
       /* Cannot load it directly, split to load it via MOV / MOVT.  */
       if (!MEM_P (operands[1]) && arm_disable_literal_pool)
        return \"#\";
       return \"ldr%?\\t%0, %1\";
-    case 6:
-      return \"str%?\\t%1, %0\";
     case 7:
-      return \"vmov%?\\t%0, %1\\t%@ int\";
     case 8:
-      return \"vmov%?\\t%0, %1\\t%@ int\";
+      return \"str%?\\t%1, %0\";
     case 9:
+      return \"vmov%?\\t%0, %1\\t%@ int\";
+    case 10:
+      return \"vmov%?\\t%0, %1\\t%@ int\";
+    case 11:
       return \"vmov%?.f32\\t%0, %1\\t%@ int\";
-    case 10: case 11:
+    case 12: case 13:
       return output_move_vfp (operands);
+    case 14:
+      return \"vmsr\\t P0, %1\";
+    case 15:
+      return \"vmrs\\t %0, P0\";
+    case 16:
+      return \"mcr\\tp10, 7, %1, cr1, cr0, 0\\t @SET_FPSCR\";
+    case 17:
+      return \"mrc\\tp10, 7, %0, cr1, cr0, 0\\t @GET_FPSCR\";
     default:
       gcc_unreachable ();
     }
   "
   [(set_attr "predicable" "yes")
-   (set_attr "predicable_short_it" "yes,no,yes,no,no,no,no,no,no,no,no,no")
-   (set_attr "type" "mov_reg,mov_reg,mov_reg,mvn_reg,mov_imm,load_4,store_4,f_mcr,f_mrc,fmov,f_loads,f_stores")
-   (set_attr "length" "2,4,2,4,4,4,4,4,4,4,4,4")
-   (set_attr "pool_range"     "*,*,*,*,*,1018,*,*,*,*,1018,*")
-   (set_attr "neg_pool_range" "*,*,*,*,*,   0,*,*,*,*,1008,*")]
+   (set_attr "predicable_short_it" "yes,no,yes,no,no,no,no,no,no,no,no,no,no,\
+             no,no,no,no,no")
+   (set_attr "type" "mov_reg,mov_reg,mov_reg,mvn_reg,mov_imm,load_4,load_4,\
+            store_4,store_4,f_mcr,f_mrc,fmov,f_loads,f_stores,mve_move,\
+            mve_move,mrs,mrs")
+   (set_attr "length" "2,4,2,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4")
+   (set_attr "pool_range"     "*,*,*,*,*,1018,4094,*,*,*,*,*,1018,*,*,*,*,*")
+   (set_attr "arch" "*,*,*,*,*,*,*,*,*,*,*,*,*,*,mve,mve,mve,mve")
+   (set_attr "neg_pool_range" "*,*,*,*,*,   0,   0,*,*,*,*,*,1008,*,*,*,*,*")]
 )
 
 
@@ -306,12 +330,12 @@
 
 (define_insn "*movdi_vfp"
   [(set (match_operand:DI 0 "nonimmediate_di_operand" "=r,r,r,r,r,r,m,w,!r,w,w, Uv")
-       (match_operand:DI 1 "di_operand"              "r,rDa,Db,Dc,mi,mi,r,r,w,w,UvTu,w"))]
-  "TARGET_32BIT && TARGET_HARD_FLOAT
+       (match_operand:DI 1 "di_operand"       "r,rDa,Db,Dc,mi,mi,r,r,w,w,UvTu,w"))]
+  "TARGET_32BIT && TARGET_VFP_BASE
    && (   register_operand (operands[0], DImode)
        || register_operand (operands[1], DImode))
-   && !(TARGET_NEON && CONST_INT_P (operands[1])
-       && simd_immediate_valid_for_move (operands[1], DImode, NULL, NULL))"
+   && !((TARGET_NEON || TARGET_HAVE_MVE) && CONST_INT_P (operands[1])
+       && simd_immediate_valid_for_move (operands[1], DImode, NULL, NULL))"
   "*
   switch (which_alternative)
     {
@@ -333,7 +357,7 @@
     case 8:
       return \"vmov%?\\t%Q0, %R0, %P1\\t%@ int\";
     case 9:
-      if (TARGET_VFP_SINGLE)
+      if (TARGET_VFP_SINGLE || TARGET_HAVE_MVE)
        return \"vmov%?.f32\\t%0, %1\\t%@ int\;vmov%?.f32\\t%p0, %p1\\t%@ int\";
       else
        return \"vmov%?.f64\\t%P0, %P1\\t%@ int\";
@@ -390,9 +414,15 @@
     case 6: /* S register from immediate.  */
       return \"vmov.f16\\t%0, %1\t%@ __<fporbf>\";
     case 7: /* S register from memory.  */
-      return \"vld1.16\\t{%z0}, %A1\";
+      if (TARGET_HAVE_MVE)
+       return \"vldr.16\\t%0, %A1\";
+      else
+       return \"vld1.16\\t{%z0}, %A1\";
     case 8: /* Memory from S register.  */
-      return \"vst1.16\\t{%z1}, %A0\";
+      if (TARGET_HAVE_MVE)
+       return \"vstr.16\\t%1, %A0\";
+      else
+       return \"vst1.16\\t{%z1}, %A0\";
     case 9: /* ARM register from constant.  */
       {
        long bits;
@@ -593,7 +623,7 @@
 (define_insn "*thumb2_movsf_vfp"
   [(set (match_operand:SF 0 "nonimmediate_operand" "=t,?r,t, t  ,Uv,r ,m,t,r")
        (match_operand:SF 1 "hard_sf_operand"      " ?r,t,Dv,UvHa,t, mHa,r,t,r"))]
-  "TARGET_THUMB2 && TARGET_HARD_FLOAT
+  "TARGET_THUMB2 && TARGET_VFP_BASE
    && (   s_register_operand (operands[0], SFmode)
        || s_register_operand (operands[1], SFmode))"
   "*
@@ -682,7 +712,7 @@
 (define_insn "*thumb2_movdf_vfp"
   [(set (match_operand:DF 0 "nonimmediate_soft_df_operand" "=w,?r,w ,w,w  ,Uv,r ,m,w,r")
        (match_operand:DF 1 "hard_df_operand"              " ?r,w,Dy,G,UvHa,w, mHa,r, w,r"))]
-  "TARGET_THUMB2 && TARGET_HARD_FLOAT
+  "TARGET_THUMB2 && TARGET_VFP_BASE
    && (   register_operand (operands[0], DFmode)
        || register_operand (operands[1], DFmode))"
   "*
@@ -760,7 +790,7 @@
            [(match_operand 4 "cc_register" "") (const_int 0)])
          (match_operand:SF 1 "s_register_operand" "0,t,t,0,?r,?r,0,t,t")
          (match_operand:SF 2 "s_register_operand" "t,0,t,?r,0,?r,t,0,t")))]
-  "TARGET_THUMB2 && TARGET_HARD_FLOAT && !arm_restrict_it"
+  "TARGET_THUMB2 && TARGET_VFP_BASE && !arm_restrict_it"
   "@
    it\\t%D3\;vmov%D3.f32\\t%0, %2
    it\\t%d3\;vmov%d3.f32\\t%0, %1
@@ -806,7 +836,8 @@
            [(match_operand 4 "cc_register" "") (const_int 0)])
          (match_operand:DF 1 "s_register_operand" "0,w,w,0,?r,?r,0,w,w")
          (match_operand:DF 2 "s_register_operand" "w,0,w,?r,0,?r,w,0,w")))]
-  "TARGET_THUMB2 && TARGET_HARD_FLOAT && TARGET_VFP_DOUBLE && !arm_restrict_it"
+  "TARGET_THUMB2 && TARGET_VFP_BASE && TARGET_VFP_DOUBLE
+   && !arm_restrict_it"
   "@
    it\\t%D3\;vmov%D3.f64\\t%P0, %P2
    it\\t%d3\;vmov%d3.f64\\t%P0, %P1
@@ -1977,7 +2008,7 @@
     [(set (match_operand:BLK 0 "memory_operand" "=m")
          (unspec:BLK [(match_operand:DF 1 "vfp_register_operand" "")]
                      UNSPEC_PUSH_MULT))])]
-  "TARGET_32BIT && TARGET_HARD_FLOAT"
+  "TARGET_32BIT && TARGET_VFP_BASE"
   "* return vfp_output_vstmd (operands);"
   [(set_attr "type" "f_stored")]
 )
@@ -2065,16 +2096,18 @@
 
 ;; Write Floating-point Status and Control Register.
 (define_insn "set_fpscr"
-  [(unspec_volatile [(match_operand:SI 0 "register_operand" "r")] VUNSPEC_SET_FPSCR)]
-  "TARGET_HARD_FLOAT"
+  [(set (reg:SI VFPCC_REGNUM)
+       (unspec_volatile:SI
+        [(match_operand:SI 0 "register_operand" "r")] VUNSPEC_SET_FPSCR))]
+  "TARGET_VFP_BASE"
   "mcr\\tp10, 7, %0, cr1, cr0, 0\\t @SET_FPSCR"
   [(set_attr "type" "mrs")])
 
 ;; Read Floating-point Status and Control Register.
 (define_insn "get_fpscr"
   [(set (match_operand:SI 0 "register_operand" "=r")
-        (unspec_volatile:SI [(const_int 0)] VUNSPEC_GET_FPSCR))]
-  "TARGET_HARD_FLOAT"
+       (unspec:SI [(reg:SI VFPCC_REGNUM)] UNSPEC_GET_FPSCR))]
+  "TARGET_VFP_BASE"
   "mrc\\tp10, 7, %0, cr1, cr0, 0\\t @GET_FPSCR"
   [(set_attr "type" "mrs")])
 

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 82bfc05..590fa16 100644 (file)
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,12 @@
+2020-03-16  Srinath Parvathaneni  <srinath.parvathaneni@arm.com>
+
+       * gcc.target/arm/mve/intrinsics/mve_fp_fpu1.c: New test.
+       * gcc.target/arm/mve/intrinsics/mve_fp_fpu2.c: Likewise.
+       * gcc.target/arm/mve/intrinsics/mve_fpu1.c: Likewise.
+       * gcc.target/arm/mve/intrinsics/mve_fpu2.c: Likewise.
+       * gcc.target/arm/mve/intrinsics/mve_fpu3.c: Likewise.
+
+
 2020-03-16  Andre Vieira  <andre.simoesdiasvieira@arm.com>
             Mihail Ionescu  <mihail.ionescu@arm.com>
             Srinath Parvathaneni  <srinath.parvathaneni@arm.com>

diff --git a/gcc/testsuite/gcc.target/arm/mve/intrinsics/mve_fp_fpu1.c b/gcc/testsuite/gcc.target/arm/mve/intrinsics/mve_fp_fpu1.c
new file mode 100644 (file)
index 0000000..17ba616
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/mve/intrinsics/mve_fp_fpu1.c
@@ -0,0 +1,14 @@
+/* { dg-do compile  } */
+/* { dg-require-effective-target arm_v8_1m_mve_fp_ok } */
+/* { dg-additional-options "-march=armv8.1-m.main+mve.fp -mfloat-abi=hard -mthumb" } */
+
+#include "arm_mve.h"
+
+int8x16_t
+foo1 (int8x16_t value)
+{
+  int8x16_t b = value;
+  return b;
+}
+
+/* { dg-final { scan-assembler "\.fpu fpv5-sp-d16" }  } */

diff --git a/gcc/testsuite/gcc.target/arm/mve/intrinsics/mve_fp_fpu2.c b/gcc/testsuite/gcc.target/arm/mve/intrinsics/mve_fp_fpu2.c
new file mode 100644 (file)
index 0000000..7b877c4
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/mve/intrinsics/mve_fp_fpu2.c
@@ -0,0 +1,14 @@
+/* { dg-do compile  } */
+/* { dg-require-effective-target arm_v8_1m_mve_fp_ok } */
+/* { dg-additional-options "-march=armv8.1-m.main+mve.fp -mfloat-abi=softfp -mthumb" } */
+
+#include "arm_mve.h"
+
+int8x16_t
+foo1 (int8x16_t value)
+{
+  int8x16_t b = value;
+  return b;
+}
+
+/* { dg-final { scan-assembler "\.fpu fpv5-sp-d16" }  } */

diff --git a/gcc/testsuite/gcc.target/arm/mve/intrinsics/mve_fpu1.c b/gcc/testsuite/gcc.target/arm/mve/intrinsics/mve_fpu1.c
new file mode 100644 (file)
index 0000000..85fbb57
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/mve/intrinsics/mve_fpu1.c
@@ -0,0 +1,14 @@
+/* { dg-do compile  } */
+/* { dg-require-effective-target arm_v8_1m_mve_ok } */
+/* { dg-additional-options "-march=armv8.1-m.main+mve -mfloat-abi=hard -mthumb" } */
+
+#include "arm_mve.h"
+
+int8x16_t
+foo1 (int8x16_t value)
+{
+  int8x16_t b = value;
+  return b;
+}
+
+/* { dg-final { scan-assembler-not "\.fpu softvfp" }  } */

diff --git a/gcc/testsuite/gcc.target/arm/mve/intrinsics/mve_fpu2.c b/gcc/testsuite/gcc.target/arm/mve/intrinsics/mve_fpu2.c
new file mode 100644 (file)
index 0000000..23b3683
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/mve/intrinsics/mve_fpu2.c
@@ -0,0 +1,14 @@
+/* { dg-do compile  } */
+/* { dg-require-effective-target arm_v8_1m_mve_ok } */
+/* { dg-additional-options "-march=armv8.1-m.main+mve -mfloat-abi=softfp -mthumb" } */
+
+#include "arm_mve.h"
+
+int8x16_t
+foo1 (int8x16_t value)
+{
+  int8x16_t b = value;
+  return b;
+}
+
+/* { dg-final { scan-assembler-not "\.fpu softvfp" }  } */

diff --git a/gcc/testsuite/gcc.target/arm/mve/intrinsics/mve_fpu3.c b/gcc/testsuite/gcc.target/arm/mve/intrinsics/mve_fpu3.c
new file mode 100644 (file)
index 0000000..8f7fa34
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/mve/intrinsics/mve_fpu3.c
@@ -0,0 +1,12 @@
+/* { dg-do compile  } */
+/* { dg-require-effective-target arm_v8_1m_mve_ok } */
+/* { dg-additional-options "-march=armv8.1-m.main+mve -mfloat-abi=soft -mthumb" } */
+
+int
+foo1 (int value)
+{
+  int b = value;
+  return b;
+}
+
+/* { dg-final { scan-assembler "\.fpu softvfp" }  } */