Commit a7b7b983 authored by Paul A. Clarke's avatar Paul A. Clarke Committed by David Gibson
Browse files

ppc: Fix emulated INFINITY and NAN conversions 



helper_todouble() was not properly converting INFINITY from 32 bit
float to 64 bit double.

(Normalized operand conversion is unchanged, other than indentation.)

Signed-off-by: default avatarPaul A. Clarke <pc@us.ibm.com>
Message-Id: <1566242388-9244-1-git-send-email-pc@us.ibm.com>
Reviewed-by: default avatarRichard Henderson <richard.henderson@linaro.org>
Signed-off-by: default avatarDavid Gibson <david@gibson.dropbear.id.au>
parent e6f1bfb2

target/ppc/fpu_helper.c

+11 −4
Original line number Diff line number Diff line
@@ -58,10 +58,17 @@ uint64_t helper_todouble(uint32_t arg) 
    uint64_t ret;



    if (likely(abs_arg >= 0x00800000)) {

        /* Normalized operand, or Inf, or NaN.  */

        if (unlikely(extract32(arg, 23, 8) == 0xff)) {

            /* Inf or NAN.  */

            ret  = (uint64_t)extract32(arg, 31, 1) << 63;

            ret |= (uint64_t)0x7ff << 52;

            ret |= (uint64_t)extract32(arg, 0, 23) << 29;

        } else {

            /* Normalized operand.  */

            ret  = (uint64_t)extract32(arg, 30, 2) << 62;

            ret |= ((extract32(arg, 30, 1) ^ 1) * (uint64_t)7) << 59;

            ret |= (uint64_t)extract32(arg, 0, 30) << 29;

        }

    } else {

        /* Zero or Denormalized operand.  */

        ret = (uint64_t)extract32(arg, 31, 1) << 63;