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target/arm: Implement scalar float32 to bfloat16 conversion

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This is the 64-bit BFCVT and the 32-bit VCVT{B,T}.BF16.F32.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20210525225817.400336-4-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Richard Henderson 2021-05-25 15:58:08 -07:00 • committed by Peter Maydell
parent fc5200ee45
commit 3a98ac40fa
5 changed files with 51 additions and 0 deletions
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5
target/arm/vfp_helper.c
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@ -411,6 +411,11 @@ float32 VFP_HELPER(fcvts, d)(float64 x, CPUARMState *env)
return float64_to_float32(x, &env->vfp.fp_status);
}
uint32_t HELPER(bfcvt)(float32 x, void *status)
{
return float32_to_bfloat16(x, status);
}
/*
* VFP3 fixed point conversion. The AArch32 versions of fix-to-float
* must always round-to-nearest; the AArch64 ones honour the FPSCR