diff --git a/gcc/config/loongarch/loongarch.cc b/gcc/config/loongarch/loongarch.cc index 89237c377e7707f312d82e87b3c21b878a2a1d11..d506354c48a0f5ead877b9475a2445f4e72d2959 100644 --- a/gcc/config/loongarch/loongarch.cc +++ b/gcc/config/loongarch/loongarch.cc @@ -4772,6 +4772,8 @@ loongarch_output_move (rtx dest, rtx src) gcc_unreachable (); } } + if (ISA_HAS_LSX && src == CONST0_RTX (GET_MODE (src))) + return "vxor.v\t%w0,%w0,%w0"; return dbl_p ? "movgr2fr.d\t%0,%z1" : "movgr2fr.w\t%0,%z1"; } diff --git a/gcc/testsuite/gcc.target/loongarch/mov-zero-1.c b/gcc/testsuite/gcc.target/loongarch/mov-zero-1.c new file mode 100644 index 0000000000000000000000000000000000000000..4744f2f2fdb9221221b28048bec650607b1f6656 --- /dev/null +++ b/gcc/testsuite/gcc.target/loongarch/mov-zero-1.c @@ -0,0 +1,15 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -mlsx" } */ +/* { dg-final { scan-assembler-times "vxor\\.v" 2 } } */ + +double +get_double_zero () +{ + return 0; +} + +float +get_float_zero () +{ + return 0; +} diff --git a/gcc/testsuite/gcc.target/loongarch/mov-zero-2.c b/gcc/testsuite/gcc.target/loongarch/mov-zero-2.c new file mode 100644 index 0000000000000000000000000000000000000000..6cb48052d0b4fa5b1c0d00ca9ff0fa9f7f96d6b9 --- /dev/null +++ b/gcc/testsuite/gcc.target/loongarch/mov-zero-2.c @@ -0,0 +1,15 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -mno-lsx" } */ +/* { dg-final { scan-assembler-times "movgr2fr" 2 } } */ + +double +get_double_zero () +{ + return 0; +} + +float +get_float_zero () +{ + return 0; +}