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target/ppc: Tidy helper_fsqrt

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Tidy the invalid exception checking so that we rely on softfloat for
initial argument validation, and select the kind of invalid operand
exception only when we know we must.  Pass and return float64 values
directly rather than bounce through the CPU_DoubleU union.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Richard Henderson 2018-07-03 08:17:30 -07:00 • committed by David Gibson
parent ac43cec37e
commit 49ab52ef69
2 changed files with 15 additions and 16 deletions
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target/ppc/helper.h
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@ -93,7 +93,7 @@ DEF_HELPER_4(fmadd, i64, env, i64, i64, i64)
DEF_HELPER_4(fmsub, i64, env, i64, i64, i64)
DEF_HELPER_4(fnmadd, i64, env, i64, i64, i64)
DEF_HELPER_4(fnmsub, i64, env, i64, i64, i64)
DEF_HELPER_2(fsqrt, i64, env, i64)
DEF_HELPER_2(fsqrt, f64, env, f64)
DEF_HELPER_2(fre, i64, env, i64)
DEF_HELPER_2(fres, i64, env, i64)
DEF_HELPER_2(frsqrte, i64, env, i64)