diff options
| -rw-r--r-- | gcc/emit-rtl.c | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/gcc/emit-rtl.c b/gcc/emit-rtl.c index 6de03151295..95f276fda26 100644 --- a/gcc/emit-rtl.c +++ b/gcc/emit-rtl.c @@ -563,12 +563,28 @@ gen_lowpart_common (mode, x) /* If X is an integral constant but we want it in floating-point, it must be the case that we have a union of an integer and a floating-point value. If the machine-parameters allow it, simulate that union here - and return the result. */ + and return the result. The two-word and single-word cases are + different. */ else if (((HOST_FLOAT_FORMAT == TARGET_FLOAT_FORMAT && HOST_BITS_PER_INT == BITS_PER_WORD) || flag_pretend_float) && GET_MODE_CLASS (mode) == MODE_FLOAT + && GET_MODE_SIZE (mode) == UNITS_PER_WORD + && GET_CODE (x) == CONST_INT + && sizeof (float) * HOST_BITS_PER_CHAR == HOST_BITS_PER_INT) + { + union {int i; float d; } u; + + u.i = INTVAL (x); + return immed_real_const_1 (u.d, mode); + } + + else if (((HOST_FLOAT_FORMAT == TARGET_FLOAT_FORMAT + && HOST_BITS_PER_INT == BITS_PER_WORD) + || flag_pretend_float) + && GET_MODE_CLASS (mode) == MODE_FLOAT + && GET_MODE_SIZE (mode) == 2 * UNITS_PER_WORD && (GET_CODE (x) == CONST_INT || GET_CODE (x) == CONST_DOUBLE) && GET_MODE (x) == VOIDmode && sizeof (double) * HOST_BITS_PER_CHAR == 2 * HOST_BITS_PER_INT) |