mirror of https://github.com/xemu-project/xemu.git
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: Paul A. Clarke <pc@us.ibm.com> Message-Id: <1566242388-9244-1-git-send-email-pc@us.ibm.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
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@ -58,10 +58,17 @@ uint64_t helper_todouble(uint32_t arg)
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uint64_t ret;
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if (likely(abs_arg >= 0x00800000)) {
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/* Normalized operand, or Inf, or NaN. */
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ret = (uint64_t)extract32(arg, 30, 2) << 62;
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ret |= ((extract32(arg, 30, 1) ^ 1) * (uint64_t)7) << 59;
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ret |= (uint64_t)extract32(arg, 0, 30) << 29;
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if (unlikely(extract32(arg, 23, 8) == 0xff)) {
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/* Inf or NAN. */
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ret = (uint64_t)extract32(arg, 31, 1) << 63;
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ret |= (uint64_t)0x7ff << 52;
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ret |= (uint64_t)extract32(arg, 0, 23) << 29;
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} else {
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/* Normalized operand. */
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ret = (uint64_t)extract32(arg, 30, 2) << 62;
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ret |= ((extract32(arg, 30, 1) ^ 1) * (uint64_t)7) << 59;
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ret |= (uint64_t)extract32(arg, 0, 30) << 29;
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}
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} else {
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/* Zero or Denormalized operand. */
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ret = (uint64_t)extract32(arg, 31, 1) << 63;
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