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arm/translate-a64: add FP16 FPRINTx to simd_two_reg_misc_fp16

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This adds the full range of half-precision floating point to integral
instructions.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20180227143852.11175-18-alex.bennee@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Alex Bennée 2018-03-01 11:05:53 +00:00 • committed by Peter Maydell
parent 5d432be6fd
commit 6109aea2d9
3 changed files with 142 additions and 5 deletions
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22
target/arm/helper-a64.c
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@ -745,3 +745,25 @@ uint32_t HELPER(advsimd_acgt_f16)(float16 a, float16 b, void *fpstp)
int compare = float16_compare(f0, f1, fpst);
return ADVSIMD_CMPRES(compare == float_relation_greater);
}
/* round to integral */
float16 HELPER(advsimd_rinth_exact)(float16 x, void *fp_status)
{
return float16_round_to_int(x, fp_status);
}
float16 HELPER(advsimd_rinth)(float16 x, void *fp_status)
{
int old_flags = get_float_exception_flags(fp_status), new_flags;
float16 ret;
ret = float16_round_to_int(x, fp_status);
/* Suppress any inexact exceptions the conversion produced */
if (!(old_flags & float_flag_inexact)) {
new_flags = get_float_exception_flags(fp_status);
set_float_exception_flags(new_flags & ~float_flag_inexact, fp_status);
}
return ret;
}