static bool arm_output_ttype (rtx);
#endif
static void arm_dwarf_handle_frame_unspec (const char *, rtx, int);
+static rtx arm_dwarf_register_span (rtx);
static tree arm_cxx_guard_type (void);
static bool arm_cxx_guard_mask_bit (void);
#undef TARGET_DWARF_HANDLE_FRAME_UNSPEC
#define TARGET_DWARF_HANDLE_FRAME_UNSPEC arm_dwarf_handle_frame_unspec
+#undef TARGET_DWARF_REGISTER_SPAN
+#define TARGET_DWARF_REGISTER_SPAN arm_dwarf_register_span
+
#undef TARGET_CANNOT_COPY_INSN_P
#define TARGET_CANNOT_COPY_INSN_P arm_cannot_copy_insn_p
if (IS_FPA_REGNUM (regno))
return (TARGET_AAPCS_BASED ? 96 : 16) + regno - FIRST_FPA_REGNUM;
- /* FIXME: VFPv3 register numbering. */
if (IS_VFP_REGNUM (regno))
- return 64 + regno - FIRST_VFP_REGNUM;
+ {
+ /* See comment in arm_dwarf_register_span. */
+ if (VFP_REGNO_OK_FOR_SINGLE (regno))
+ return 64 + regno - FIRST_VFP_REGNUM;
+ else
+ return 256 + (regno - FIRST_VFP_REGNUM) / 2;
+ }
if (IS_IWMMXT_GR_REGNUM (regno))
return 104 + regno - FIRST_IWMMXT_GR_REGNUM;
gcc_unreachable ();
}
+/* Dwarf models VFPv3 registers as 32 64-bit registers.
+ GCC models tham as 64 32-bit registers, so we need to describe this to
+ the DWARF generation code. Other registers can use the default. */
+static rtx
+arm_dwarf_register_span (rtx rtl)
+{
+ unsigned regno;
+ int nregs;
+ int i;
+ rtx p;
+
+ regno = REGNO (rtl);
+ if (!IS_VFP_REGNUM (regno))
+ return NULL_RTX;
+
+ /* XXX FIXME: The EABI defines two VFP register ranges:
+ 64-95: Legacy VFPv2 numbering for S0-S31 (obsolescent)
+ 256-287: D0-D31
+ The recommended encoding for S0-S31 is a DW_OP_bit_piece of the
+ corresponding D register. Until GDB supports this, we shall use the
+ legacy encodings. We also use these encodings for D0-D15 for
+ compatibility with older debuggers. */
+ if (VFP_REGNO_OK_FOR_SINGLE (regno))
+ return NULL_RTX;
+
+ nregs = GET_MODE_SIZE (GET_MODE (rtl)) / 8;
+ p = gen_rtx_PARALLEL (VOIDmode, rtvec_alloc (nregs));
+ regno = (regno - FIRST_VFP_REGNUM) / 2;
+ for (i = 0; i < nregs; i++)
+ XVECEXP (p, 0, i) = gen_rtx_REG (DImode, 256 + regno + i);
+
+ return p;
+}
#ifdef TARGET_UNWIND_INFO
/* Emit unwind directives for a store-multiple instruction or stack pointer