RISC-V: Fix riscv_subword() for big endian

gcc/
	* config/riscv/riscv.c (riscv_subword): Take endianness into
	account when calculating the byte offset.

diff --git a/gcc/config/riscv/riscv.c b/gcc/config/riscv/riscv.c
index fe48db7..17cdf70 100644 (file)
--- a/gcc/config/riscv/riscv.c
+++ b/gcc/config/riscv/riscv.c
@@ -1966,7 +1966,7 @@ riscv_address_cost (rtx addr, machine_mode mode,
 rtx
 riscv_subword (rtx op, bool high_p)
 {
-  unsigned int byte = high_p ? UNITS_PER_WORD : 0;
+  unsigned int byte = (high_p != BYTES_BIG_ENDIAN) ? UNITS_PER_WORD : 0;
   machine_mode mode = GET_MODE (op);
 
   if (mode == VOIDmode)