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target/ppc: Add helper for fsqrts

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Use float64r32_sqrt.  Fixes a double-rounding issue with performing
the compuation in float64 and then rounding afterward.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20211119160502.17432-30-richard.henderson@linaro.org>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
This commit is contained in:
Richard Henderson 2021-12-17 17:57:16 +01:00 • committed by Cédric Le Goater
parent d04ca895dc
commit 41ae890d08
3 changed files with 14 additions and 2 deletions
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target/ppc/helper.h
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@ -106,6 +106,7 @@ DEF_HELPER_4(fmsubs, i64, env, i64, i64, i64)
DEF_HELPER_4(fnmadds, i64, env, i64, i64, i64)
DEF_HELPER_4(fnmsubs, i64, env, i64, i64, i64)
DEF_HELPER_2(fsqrt, f64, env, f64)
DEF_HELPER_2(fsqrts, f64, env, f64)
DEF_HELPER_2(fre, i64, env, i64)
DEF_HELPER_2(fres, i64, env, i64)
DEF_HELPER_2(frsqrte, i64, env, i64)