RISC-V: Replace simm32_p with immediate_operand (Pmode)

simm32_p is used to check constant int value within 32-bit.
It's used in handling SEW = 64 in rv32 system since such constant int
value with 32-bit allow us use vx instruction.

The current implementation of simm32_p is quite ugly and now I figure
out immedate_operand (op, pmode) can help us to check whether the op
is a constant value within 32-bit.

I already have a bunch testcases to test SEW = 64 in rv32 system and
all regression tests are passed with this patch.

gcc/ChangeLog:

	* config/riscv/riscv-protos.h (simm32_p): Remove.
	* config/riscv/riscv-v.cc (simm32_p): Ditto.
	* config/riscv/vector.md: Use immediate_operand
	instead of riscv_vector::simm32_p.

3 files changed, 17 insertions, 28 deletions

diff --git a/gcc/config/riscv/riscv-protos.h b/gcc/config/riscv/riscv-protos.h
index 9d8b0b7..ee8e903 100644
--- a/gcc/config/riscv/riscv-protos.h
+++ b/gcc/config/riscv/riscv-protos.h
@@ -176,7 +176,6 @@ enum tail_policy get_prefer_tail_policy ();
 enum mask_policy get_prefer_mask_policy ();
 rtx get_avl_type_rtx (enum avl_type);
 opt_machine_mode get_vector_mode (scalar_mode, poly_uint64);
-extern bool simm32_p (rtx);
 extern bool simm5_p (rtx);
 extern bool neg_simm5_p (rtx);
 #ifdef RTX_CODE
diff --git a/gcc/config/riscv/riscv-v.cc b/gcc/config/riscv/riscv-v.cc
index 600b2e6..dd70bf9 100644
--- a/gcc/config/riscv/riscv-v.cc
+++ b/gcc/config/riscv/riscv-v.cc
@@ -396,16 +396,6 @@ get_vector_mode (scalar_mode inner_mode, poly_uint64 nunits)
   return opt_machine_mode ();
 }
 
-/* Helper functions for handling sew=64 on RV32 system. */
-bool
-simm32_p (rtx x)
-{
-  if (!CONST_INT_P (x))
-    return false;
-  unsigned HOST_WIDE_INT val = UINTVAL (x);
-  return val <= 0x7FFFFFFFULL || val >= 0xFFFFFFFF80000000ULL;
-}
-
 bool
 simm5_p (rtx x)
 {
diff --git a/gcc/config/riscv/vector.md b/gcc/config/riscv/vector.md
index 2d8179f..cc550b7 100644
--- a/gcc/config/riscv/vector.md
+++ b/gcc/config/riscv/vector.md
@@ -889,7 +889,7 @@
       {
 	rtx v = gen_reg_rtx (<MODE>mode);
 
-	if (riscv_vector::simm32_p (operands[3]))
+	if (immediate_operand (operands[3], Pmode))
 	  operands[3] = gen_rtx_SIGN_EXTEND (<VEL>mode,
 		force_reg (Pmode, operands[3]));
 	else
@@ -1479,7 +1479,7 @@
       {
 	rtx v = gen_reg_rtx (<MODE>mode);
 
-	if (riscv_vector::simm32_p (operands[4]))
+	if (immediate_operand (operands[4], Pmode))
 	  {
 	    if (!rtx_equal_p (operands[4], const0_rtx))
 	      operands[4] = force_reg (Pmode, operands[4]);
@@ -1572,7 +1572,7 @@
       {
 	rtx v = gen_reg_rtx (<MODE>mode);
 
-	if (riscv_vector::simm32_p (operands[4]))
+	if (immediate_operand (operands[4], Pmode))
 	  {
 	    if (!rtx_equal_p (operands[4], const0_rtx))
 	      operands[4] = force_reg (Pmode, operands[4]);
@@ -1665,7 +1665,7 @@
       {
 	rtx v = gen_reg_rtx (<MODE>mode);
 
-	if (riscv_vector::simm32_p (operands[4]))
+	if (immediate_operand (operands[4], Pmode))
 	  operands[4] = gen_rtx_SIGN_EXTEND (<VEL>mode,
 		force_reg (Pmode, operands[4]));
 	else
@@ -1820,7 +1820,7 @@
       {
 	rtx v = gen_reg_rtx (<MODE>mode);
 
-	if (riscv_vector::simm32_p (operands[4]))
+	if (immediate_operand (operands[4], Pmode))
 	  operands[4] = gen_rtx_SIGN_EXTEND (<VEL>mode,
 		force_reg (Pmode, operands[4]));
 	else
@@ -1907,7 +1907,7 @@
       {
 	rtx v = gen_reg_rtx (<MODE>mode);
 
-	if (riscv_vector::simm32_p (operands[4]))
+	if (immediate_operand (operands[4], Pmode))
 	  operands[4] = gen_rtx_SIGN_EXTEND (<VEL>mode,
 		force_reg (Pmode, operands[4]));
 	else
@@ -2034,7 +2034,7 @@
       {
 	rtx v = gen_reg_rtx (<MODE>mode);
 
-	if (riscv_vector::simm32_p (operands[4]))
+	if (immediate_operand (operands[4], Pmode))
 	  {
 	    if (!rtx_equal_p (operands[4], const0_rtx))
 	      operands[4] = force_reg (Pmode, operands[4]);
@@ -2226,7 +2226,7 @@
       {
         rtx v = gen_reg_rtx (<MODE>mode);
 
-	if (riscv_vector::simm32_p (operands[3]))
+	if (immediate_operand (operands[3], Pmode))
 	  operands[3] = gen_rtx_SIGN_EXTEND (<VEL>mode,
 		force_reg (Pmode, operands[3]));
         else
@@ -2320,7 +2320,7 @@
       {
         rtx v = gen_reg_rtx (<MODE>mode);
 
-	if (riscv_vector::simm32_p (operands[3]))
+	if (immediate_operand (operands[3], Pmode))
 	  {
 	    if (!rtx_equal_p (operands[3], const0_rtx))
 	      operands[3] = force_reg (Pmode, operands[3]);
@@ -2497,7 +2497,7 @@
       {
 	rtx v = gen_reg_rtx (<MODE>mode);
 
-	if (riscv_vector::simm32_p (operands[2]))
+	if (immediate_operand (operands[2], Pmode))
 	  operands[2] = gen_rtx_SIGN_EXTEND (<VEL>mode,
 		force_reg (Pmode, operands[2]));
 	else
@@ -2577,7 +2577,7 @@
       {
         rtx v = gen_reg_rtx (<MODE>mode);
 
-	if (riscv_vector::simm32_p (operands[2]))
+	if (immediate_operand (operands[2], Pmode))
 	  {
 	    if (!rtx_equal_p (operands[2], const0_rtx))
 	      operands[2] = force_reg (Pmode, operands[2]);
@@ -2738,7 +2738,7 @@
       {
         rtx v = gen_reg_rtx (<MODE>mode);
 
-	if (riscv_vector::simm32_p (operands[2]))
+	if (immediate_operand (operands[2], Pmode))
 	  operands[2] = gen_rtx_SIGN_EXTEND (<VEL>mode,
 		force_reg (Pmode, operands[2]));
 	else
@@ -2815,7 +2815,7 @@
       {
         rtx v = gen_reg_rtx (<MODE>mode);
 
-	if (riscv_vector::simm32_p (operands[2]))
+	if (immediate_operand (operands[2], Pmode))
 	  {
 	    if (!rtx_equal_p (operands[2], const0_rtx))
 	      operands[2] = force_reg (Pmode, operands[2]);
@@ -3310,7 +3310,7 @@
       {
 	rtx v = gen_reg_rtx (<MODE>mode);
 
-	if (riscv_vector::simm32_p (operands[4]))
+	if (immediate_operand (operands[4], Pmode))
 	  {
 	    if (!rtx_equal_p (operands[4], const0_rtx))
 	      operands[4] = force_reg (Pmode, operands[4]);
@@ -3686,7 +3686,7 @@
       {
 	rtx v = gen_reg_rtx (<MODE>mode);
 
-	if (riscv_vector::simm32_p (operands[5]))
+	if (immediate_operand (operands[5], Pmode))
 	  {
 	    if (!rtx_equal_p (operands[5], const0_rtx))
 	      operands[5] = force_reg (Pmode, operands[5]);
@@ -3739,7 +3739,7 @@
       {
 	rtx v = gen_reg_rtx (<MODE>mode);
 
-	if (riscv_vector::simm32_p (operands[5]))
+	if (immediate_operand (operands[5], Pmode))
 	  {
 	    if (!rtx_equal_p (operands[5], const0_rtx))
 	      operands[5] = force_reg (Pmode, operands[5]);
@@ -4404,7 +4404,7 @@
     {
       rtx v = gen_reg_rtx (<MODE>mode);
 
-      if (riscv_vector::simm32_p (operands[2]))
+      if (immediate_operand (operands[2], Pmode))
         operands[2] = gen_rtx_SIGN_EXTEND (<VEL>mode,
       		force_reg (Pmode, operands[2]));
       else