bpf: correct bpf_print_operand for floats [PR108293]

The existing logic in bpf_print_operand was only correct for integral
CONST_DOUBLEs, and emitted garbage for floating point modes. Fix it so
floating point mode operands are correctly handled.

	PR target/108293

gcc/

	* config/bpf/bpf.cc (bpf_print_operand): Correct handling for
	floating point modes.

gcc/testsuite/

	* gcc.target/bpf/double-1.c: New test.
	* gcc.target/bpf/double-2.c: New test.
	* gcc.target/bpf/float-1.c: New test.

diff --git a/gcc/config/bpf/bpf.cc b/gcc/config/bpf/bpf.cc
index 2aeaeaf..576a1fe 100644 (file)
--- a/gcc/config/bpf/bpf.cc
+++ b/gcc/config/bpf/bpf.cc
@@ -880,13 +880,35 @@ bpf_print_operand (FILE *file, rtx op, int code ATTRIBUTE_UNUSED)
       output_address (GET_MODE (op), XEXP (op, 0));
       break;
     case CONST_DOUBLE:
-      if (CONST_DOUBLE_HIGH (op))
-       fprintf (file, HOST_WIDE_INT_PRINT_DOUBLE_HEX,
-                CONST_DOUBLE_HIGH (op), CONST_DOUBLE_LOW (op));
-      else if (CONST_DOUBLE_LOW (op) < 0)
-       fprintf (file, HOST_WIDE_INT_PRINT_HEX, CONST_DOUBLE_LOW (op));
+      if (GET_MODE (op) == VOIDmode)
+       {
+         if (CONST_DOUBLE_HIGH (op))
+           fprintf (file, HOST_WIDE_INT_PRINT_DOUBLE_HEX,
+                    CONST_DOUBLE_HIGH (op), CONST_DOUBLE_LOW (op));
+         else if (CONST_DOUBLE_LOW (op) < 0)
+           fprintf (file, HOST_WIDE_INT_PRINT_HEX, CONST_DOUBLE_LOW (op));
+         else
+           fprintf (file, HOST_WIDE_INT_PRINT_DEC, CONST_DOUBLE_LOW (op));
+       }
       else
-       fprintf (file, HOST_WIDE_INT_PRINT_DEC, CONST_DOUBLE_LOW (op));
+       {
+         long vals[2];
+         real_to_target (vals, CONST_DOUBLE_REAL_VALUE (op), GET_MODE (op));
+         vals[0] &= 0xffffffff;
+         vals[1] &= 0xffffffff;
+         if (GET_MODE (op) == SFmode)
+           fprintf (file, "0x%08lx", vals[0]);
+         else if (GET_MODE (op) == DFmode)
+           {
+             /* Note: real_to_target puts vals in target word order.  */
+             if (WORDS_BIG_ENDIAN)
+               fprintf (file, "0x%08lx%08lx", vals[0], vals[1]);
+             else
+               fprintf (file, "0x%08lx%08lx", vals[1], vals[0]);
+           }
+         else
+           gcc_unreachable ();
+       }
       break;
     default:
       output_addr_const (file, op);

diff --git a/gcc/testsuite/gcc.target/bpf/double-1.c b/gcc/testsuite/gcc.target/bpf/double-1.c
new file mode 100644 (file)
index 0000000..200f1bd
--- /dev/null
+++ b/gcc/testsuite/gcc.target/bpf/double-1.c
@@ -0,0 +1,12 @@
+/* { dg-do compile } */
+/* { dg-options "-mlittle-endian" } */
+
+double f;
+double a() { f = 1.0; return 1.0; }
+double b() { f = 2.0; return 2.0; }
+double c() { f = 2.0; return 3.0; }
+double d() { f = 3.0; return 3.0; }
+
+/* { dg-final { scan-assembler-times "lddw\t%r.,0x3ff0000000000000" 2 } } */
+/* { dg-final { scan-assembler-times "lddw\t%r.,0x4000000000000000" 3 } } */
+/* { dg-final { scan-assembler-times "lddw\t%r.,0x4008000000000000" 3 } } */

diff --git a/gcc/testsuite/gcc.target/bpf/double-2.c b/gcc/testsuite/gcc.target/bpf/double-2.c
new file mode 100644 (file)
index 0000000..d04ddd0
--- /dev/null
+++ b/gcc/testsuite/gcc.target/bpf/double-2.c
@@ -0,0 +1,12 @@
+/* { dg-do compile } */
+/* { dg-options "-mbig-endian" } */
+
+double f;
+double a() { f = 1.0; return 1.0; }
+double b() { f = 2.0; return 2.0; }
+double c() { f = 2.0; return 3.0; }
+double d() { f = 3.0; return 3.0; }
+
+/* { dg-final { scan-assembler-times "lddw\t%r.,0x3ff0000000000000" 2 } } */
+/* { dg-final { scan-assembler-times "lddw\t%r.,0x4000000000000000" 3 } } */
+/* { dg-final { scan-assembler-times "lddw\t%r.,0x4008000000000000" 3 } } */

diff --git a/gcc/testsuite/gcc.target/bpf/float-1.c b/gcc/testsuite/gcc.target/bpf/float-1.c
new file mode 100644 (file)
index 0000000..05ed7bb
--- /dev/null
+++ b/gcc/testsuite/gcc.target/bpf/float-1.c
@@ -0,0 +1,12 @@
+/* { dg-do compile } */
+/* { dg-options "-mlittle-endian" } */
+
+float f;
+float a() { f = 1.0; return 1.0; }
+float b() { f = 2.0; return 2.0; }
+float c() { f = 2.0; return 3.0; }
+float d() { f = 3.0; return 3.0; }
+
+/* { dg-final { scan-assembler-times "lddw\t%r.,0x3f800000" 2 } } */
+/* { dg-final { scan-assembler-times "lddw\t%r.,0x40000000" 3 } } */
+/* { dg-final { scan-assembler-times "lddw\t%r.,0x40400000" 3 } } */