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From: David Hildenbrand <david@redhat.com>
To: Richard Henderson <richard.henderson@linaro.org>, qemu-devel@nongnu.org
Cc: alex.bennee@linaro.org
Subject: Re: [PATCH 28/72] softfloat: Move return_nan to softfloat-parts.c.inc
Date: Wed, 12 May 2021 20:10:25 +0200	[thread overview]
Message-ID: <760af95e-5924-92ea-fa7c-40e3eeda8b3f@redhat.com> (raw)
In-Reply-To: <20210508014802.892561-29-richard.henderson@linaro.org>

On 08.05.21 03:47, Richard Henderson wrote:
> At the same time, convert to pointers, rename to return_nan$N
> and define a macro for return_nan using QEMU_GENERIC.
> 
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
>   fpu/softfloat.c           | 45 ++++++++++++++++++++++-----------------
>   fpu/softfloat-parts.c.inc | 37 ++++++++++++++++++++++++++++++++
>   2 files changed, 62 insertions(+), 20 deletions(-)
>   create mode 100644 fpu/softfloat-parts.c.inc
> 
> diff --git a/fpu/softfloat.c b/fpu/softfloat.c
> index 6d5392aeab..5b26696078 100644
> --- a/fpu/softfloat.c
> +++ b/fpu/softfloat.c
> @@ -708,6 +708,10 @@ static float128 float128_pack_raw(const FloatParts128 *p)
>   #define parts_default_nan(P, S)    PARTS_GENERIC_64_128(default_nan, P)(P, S)
>   #define parts_silence_nan(P, S)    PARTS_GENERIC_64_128(silence_nan, P)(P, S)
>   
> +static void parts64_return_nan(FloatParts64 *a, float_status *s);
> +static void parts128_return_nan(FloatParts128 *a, float_status *s);
> +
> +#define parts_return_nan(P, S)     PARTS_GENERIC_64_128(return_nan, P)(P, S)
>   
>   /*
>    * Helper functions for softfloat-parts.c.inc, per-size operations.
> @@ -914,22 +918,6 @@ static FloatParts64 round_canonical(FloatParts64 p, float_status *s,
>       return p;
>   }
>   
> -static FloatParts64 return_nan(FloatParts64 a, float_status *s)
> -{
> -    g_assert(is_nan(a.cls));
> -    if (is_snan(a.cls)) {
> -        float_raise(float_flag_invalid, s);
> -        if (!s->default_nan_mode) {
> -            parts_silence_nan(&a, s);
> -            return a;
> -        }
> -    } else if (!s->default_nan_mode) {
> -        return a;
> -    }
> -    parts_default_nan(&a, s);
> -    return a;
> -}
> -
>   static FloatParts64 pick_nan(FloatParts64 a, FloatParts64 b, float_status *s)
>   {
>       if (is_snan(a.cls) || is_snan(b.cls)) {
> @@ -991,6 +979,21 @@ static FloatParts64 pick_nan_muladd(FloatParts64 a, FloatParts64 b, FloatParts64
>       return a;
>   }
>   
> +#define partsN(NAME)   parts64_##NAME
> +#define FloatPartsN    FloatParts64
> +
> +#include "softfloat-parts.c.inc"
> +
> +#undef  partsN
> +#undef  FloatPartsN
> +#define partsN(NAME)   parts128_##NAME
> +#define FloatPartsN    FloatParts128
> +
> +#include "softfloat-parts.c.inc"
> +
> +#undef  partsN
> +#undef  FloatPartsN
> +
>   /*
>    * Pack/unpack routines with a specific FloatFmt.
>    */
> @@ -2065,7 +2068,7 @@ static FloatParts64 float_to_float(FloatParts64 a, const FloatFmt *dstf,
>               break;
>           }
>       } else if (is_nan(a.cls)) {
> -        return return_nan(a, s);
> +        parts_return_nan(&a, s);
>       }
>       return a;
>   }
> @@ -2194,7 +2197,8 @@ static FloatParts64 round_to_int(FloatParts64 a, FloatRoundMode rmode,
>       switch (a.cls) {
>       case float_class_qnan:
>       case float_class_snan:
> -        return return_nan(a, s);
> +        parts_return_nan(&a, s);
> +        break;
>   
>       case float_class_zero:
>       case float_class_inf:
> @@ -3590,7 +3594,7 @@ FloatRelation bfloat16_compare_quiet(bfloat16 a, bfloat16 b, float_status *s)
>   static FloatParts64 scalbn_decomposed(FloatParts64 a, int n, float_status *s)
>   {
>       if (unlikely(is_nan(a.cls))) {
> -        return return_nan(a, s);
> +        parts_return_nan(&a, s);
>       }
>       if (a.cls == float_class_normal) {
>           /* The largest float type (even though not supported by FloatParts64)
> @@ -3658,7 +3662,8 @@ static FloatParts64 sqrt_float(FloatParts64 a, float_status *s, const FloatFmt *
>       int bit, last_bit;
>   
>       if (is_nan(a.cls)) {
> -        return return_nan(a, s);
> +        parts_return_nan(&a, s);
> +        return a;
>       }
>       if (a.cls == float_class_zero) {
>           return a;  /* sqrt(+-0) = +-0 */
> diff --git a/fpu/softfloat-parts.c.inc b/fpu/softfloat-parts.c.inc
> new file mode 100644
> index 0000000000..2a3075d6fe
> --- /dev/null
> +++ b/fpu/softfloat-parts.c.inc
> @@ -0,0 +1,37 @@
> +/*
> + * QEMU float support
> + *
> + * The code in this source file is derived from release 2a of the SoftFloat
> + * IEC/IEEE Floating-point Arithmetic Package. Those parts of the code (and
> + * some later contributions) are provided under that license, as detailed below.
> + * It has subsequently been modified by contributors to the QEMU Project,
> + * so some portions are provided under:
> + *  the SoftFloat-2a license
> + *  the BSD license
> + *  GPL-v2-or-later
> + *
> + * Any future contributions to this file after December 1st 2014 will be
> + * taken to be licensed under the Softfloat-2a license unless specifically
> + * indicated otherwise.
> + */
> +
> +static void partsN(return_nan)(FloatPartsN *a, float_status *s)
> +{
> +    switch (a->cls) {
> +    case float_class_snan:
> +        float_raise(float_flag_invalid, s);
> +        if (s->default_nan_mode) {
> +            parts_default_nan(a, s);
> +        } else {
> +            parts_silence_nan(a, s);
> +        }
> +        break;
> +    case float_class_qnan:
> +        if (s->default_nan_mode) {
> +            parts_default_nan(a, s);
> +        }
> +        break;
> +    default:
> +        g_assert_not_reached();
> +    }
> +}
> 

Reviewed-by: David Hildenbrand <david@redhat.com>

-- 
Thanks,

David / dhildenb



  reply	other threads:[~2021-05-12 18:11 UTC|newest]

Thread overview: 151+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-08  1:46 [PATCH 00/72] Convert floatx80 and float128 to FloatParts Richard Henderson
2021-05-08  1:46 ` [PATCH 01/72] qemu/host-utils: Use __builtin_bitreverseN Richard Henderson
2021-05-10  9:59   ` Alex Bennée
2021-05-11  9:41   ` David Hildenbrand
2021-05-08  1:46 ` [PATCH 02/72] qemu/host-utils: Add wrappers for overflow builtins Richard Henderson
2021-05-10 10:22   ` Alex Bennée
2021-05-08  1:46 ` [PATCH 03/72] qemu/host-utils: Add wrappers for carry builtins Richard Henderson
2021-05-10 12:57   ` Alex Bennée
2021-05-11 20:10     ` Richard Henderson
2021-05-12 11:17       ` Alex Bennée
2021-05-08  1:46 ` [PATCH 04/72] accel/tcg: Use add/sub overflow routines in tcg-runtime-gvec.c Richard Henderson
2021-05-09  8:43   ` Philippe Mathieu-Daudé
2021-05-10 13:02   ` Alex Bennée
2021-05-11  9:46   ` David Hildenbrand
2021-05-08  1:46 ` [PATCH 05/72] tests/fp: add quad support to the benchmark utility Richard Henderson
2021-05-11 10:01   ` David Hildenbrand
2021-05-08  1:46 ` [PATCH 06/72] softfloat: Move the binary point to the msb Richard Henderson
2021-05-10 13:36   ` Alex Bennée
2021-05-08  1:46 ` [PATCH 07/72] softfloat: Inline float_raise Richard Henderson
2021-05-09  8:32   ` Philippe Mathieu-Daudé
2021-05-11 10:04   ` David Hildenbrand
2021-05-08  1:46 ` [PATCH 08/72] softfloat: Use float_raise in more places Richard Henderson
2021-05-09  8:34   ` Philippe Mathieu-Daudé
2021-05-11 10:06   ` David Hildenbrand
2021-05-08  1:46 ` [PATCH 09/72] softfloat: Tidy a * b + inf return Richard Henderson
2021-05-08  1:47 ` [PATCH 10/72] softfloat: Add float_cmask and constants Richard Henderson
2021-05-08  1:47 ` [PATCH 11/72] softfloat: Use return_nan in float_to_float Richard Henderson
2021-05-10 15:10   ` Alex Bennée
2021-05-11 10:10   ` David Hildenbrand
2021-05-08  1:47 ` [PATCH 12/72] softfloat: fix return_nan vs default_nan_mode Richard Henderson
2021-05-10 15:12   ` Alex Bennée
2021-05-11 10:12   ` David Hildenbrand
2021-05-08  1:47 ` [PATCH 13/72] target/mips: Set set_default_nan_mode with set_snan_bit_is_one Richard Henderson
2021-05-11  9:37   ` Alex Bennée
2021-05-11 10:16   ` David Hildenbrand
2021-05-08  1:47 ` [PATCH 14/72] softfloat: Do not produce a default_nan from parts_silence_nan Richard Henderson
2021-05-11 10:16   ` David Hildenbrand
2021-05-11 10:32   ` Alex Bennée
2021-05-08  1:47 ` [PATCH 15/72] softfloat: Rename FloatParts to FloatParts64 Richard Henderson
2021-05-09  8:45   ` Philippe Mathieu-Daudé
2021-05-11 10:16   ` David Hildenbrand
2021-05-08  1:47 ` [PATCH 16/72] softfloat: Move type-specific pack/unpack routines Richard Henderson
2021-05-09  8:46   ` Philippe Mathieu-Daudé
2021-05-11 10:17   ` David Hildenbrand
2021-05-08  1:47 ` [PATCH 17/72] softfloat: Use pointers with parts_default_nan Richard Henderson
2021-05-11 10:22   ` David Hildenbrand
2021-05-11 20:19     ` Richard Henderson
2021-05-08  1:47 ` [PATCH 18/72] softfloat: Use pointers with unpack_raw Richard Henderson
2021-05-09  8:48   ` Philippe Mathieu-Daudé
2021-05-12 12:58   ` Alex Bennée
2021-05-08  1:47 ` [PATCH 19/72] softfloat: Use pointers with ftype_unpack_raw Richard Henderson
2021-05-11 11:31   ` Alex Bennée
2021-05-08  1:47 ` [PATCH 20/72] softfloat: Use pointers with pack_raw Richard Henderson
2021-05-11 11:32   ` Alex Bennée
2021-05-08  1:47 ` [PATCH 21/72] softfloat: Use pointers with ftype_pack_raw Richard Henderson
2021-05-11 11:32   ` Alex Bennée
2021-05-08  1:47 ` [PATCH 22/72] softfloat: Use pointers with ftype_unpack_canonical Richard Henderson
2021-05-11 13:54   ` Alex Bennée
2021-05-08  1:47 ` [PATCH 23/72] softfloat: Use pointers with ftype_round_pack_canonical Richard Henderson
2021-05-11 13:55   ` Alex Bennée
2021-05-08  1:47 ` [PATCH 24/72] softfloat: Use pointers with parts_silence_nan Richard Henderson
2021-05-11 13:56   ` Alex Bennée
2021-05-08  1:47 ` [PATCH 25/72] softfloat: Rearrange FloatParts64 Richard Henderson
2021-05-11 13:57   ` Alex Bennée
2021-05-11 15:04     ` Richard Henderson
2021-05-12 11:08       ` Alex Bennée
2021-05-08  1:47 ` [PATCH 26/72] softfloat: Convert float128_silence_nan to parts Richard Henderson
2021-05-13  8:34   ` Alex Bennée
2021-05-13 12:25     ` Richard Henderson
2021-05-08  1:47 ` [PATCH 27/72] softfloat: Convert float128_default_nan " Richard Henderson
2021-05-13  8:56   ` Alex Bennée
2021-05-08  1:47 ` [PATCH 28/72] softfloat: Move return_nan to softfloat-parts.c.inc Richard Henderson
2021-05-12 18:10   ` David Hildenbrand [this message]
2021-05-08  1:47 ` [PATCH 29/72] softfloat: Move pick_nan " Richard Henderson
2021-05-12 18:16   ` David Hildenbrand
2021-05-13 12:28     ` Richard Henderson
2021-05-08  1:47 ` [PATCH 30/72] softfloat: Move pick_nan_muladd " Richard Henderson
2021-05-12 18:18   ` David Hildenbrand
2021-05-08  1:47 ` [PATCH 31/72] softfloat: Move sf_canonicalize " Richard Henderson
2021-05-13  9:45   ` Alex Bennée
2021-05-08  1:47 ` [PATCH 32/72] softfloat: Move round_canonical " Richard Henderson
2021-05-13  9:53   ` Alex Bennée
2021-05-08  1:47 ` [PATCH 33/72] softfloat: Use uadd64_carry, usub64_borrow in softfloat-macros.h Richard Henderson
2021-05-13 10:00   ` Alex Bennée
2021-05-13 12:38     ` Richard Henderson
2021-05-08  1:47 ` [PATCH 34/72] softfloat: Move addsub_floats to softfloat-parts.c.inc Richard Henderson
2021-05-13 10:03   ` Alex Bennée
2021-05-13 10:05   ` Alex Bennée
2021-05-08  1:47 ` [PATCH 35/72] softfloat: Implement float128_add/sub via parts Richard Henderson
2021-05-13 10:06   ` Alex Bennée
2021-05-08  1:47 ` [PATCH 36/72] softfloat: Move mul_floats to softfloat-parts.c.inc Richard Henderson
2021-05-13 10:08   ` Alex Bennée
2021-05-08  1:47 ` [PATCH 37/72] softfloat: Move muladd_floats " Richard Henderson
2021-05-13 10:43   ` Alex Bennée
2021-05-08  1:47 ` [PATCH 38/72] softfloat: Use mulu64 for mul64To128 Richard Henderson
2021-05-08  1:47 ` [PATCH 39/72] softfloat: Use add192 in mul128To256 Richard Henderson
2021-05-13 10:49   ` Alex Bennée
2021-05-08  1:47 ` [PATCH 40/72] softfloat: Tidy mul128By64To192 Richard Henderson
2021-05-13 10:50   ` Alex Bennée
2021-05-08  1:47 ` [PATCH 41/72] softfloat: Introduce sh[lr]_double primitives Richard Henderson
2021-05-13 10:59   ` Alex Bennée
2021-05-08  1:47 ` [PATCH 42/72] softfloat: Move div_floats to softfloat-parts.c.inc Richard Henderson
2021-05-13 11:02   ` Alex Bennée
2021-05-08  1:47 ` [PATCH 43/72] softfloat: Split float_to_float Richard Henderson
2021-05-13 11:04   ` Alex Bennée
2021-05-08  1:47 ` [PATCH 44/72] softfloat: Convert float-to-float conversions with float128 Richard Henderson
2021-05-13 11:17   ` Alex Bennée
2021-05-08  1:47 ` [PATCH 45/72] softfloat: Move round_to_int to softfloat-parts.c.inc Richard Henderson
2021-05-13 14:10   ` Alex Bennée
2021-05-08  1:47 ` [PATCH 46/72] softfloat: Move rount_to_int_and_pack " Richard Henderson
2021-05-13 14:11   ` Alex Bennée
2021-05-08  1:47 ` [PATCH 47/72] softfloat: Move rount_to_uint_and_pack " Richard Henderson
2021-05-08  1:47 ` [PATCH 48/72] softfloat: Move int_to_float " Richard Henderson
2021-05-08  1:47 ` [PATCH 49/72] softfloat: Move uint_to_float " Richard Henderson
2021-05-08  1:47 ` [PATCH 50/72] softfloat: Move minmax_flags " Richard Henderson
2021-05-17 13:14   ` David Hildenbrand
2021-05-17 15:57     ` Richard Henderson
2021-05-08  1:47 ` [PATCH 51/72] softfloat: Move compare_floats " Richard Henderson
2021-05-08  1:47 ` [PATCH 52/72] softfloat: Move scalbn_decomposed " Richard Henderson
2021-05-08  1:47 ` [PATCH 53/72] softfloat: Move sqrt_float " Richard Henderson
2021-05-08  1:47 ` [PATCH 54/72] softfloat: Split out parts_uncanon_normal Richard Henderson
2021-05-08  1:47 ` [PATCH 55/72] softfloat: Reduce FloatFmt Richard Henderson
2021-05-08  1:47 ` [PATCH 56/72] softfloat: Introduce Floatx80RoundPrec Richard Henderson
2021-05-08  1:47 ` [PATCH 57/72] softfloat: Adjust parts_uncanon_normal for floatx80 Richard Henderson
2021-05-08  1:47 ` [PATCH 58/72] tests/fp/fp-test: Reverse order of floatx80 precision tests Richard Henderson
2021-05-13 14:12   ` Alex Bennée
2021-05-08  1:47 ` [PATCH 59/72] softfloat: Convert floatx80_add/sub to FloatParts Richard Henderson
2021-05-08  1:47 ` [PATCH 60/72] softfloat: Convert floatx80_mul " Richard Henderson
2021-05-08  1:47 ` [PATCH 61/72] softfloat: Convert floatx80_div " Richard Henderson
2021-05-08  1:47 ` [PATCH 62/72] softfloat: Convert floatx80_sqrt " Richard Henderson
2021-05-08  1:47 ` [PATCH 63/72] softfloat: Convert floatx80_round " Richard Henderson
2021-05-08  1:47 ` [PATCH 64/72] softfloat: Convert floatx80_round_to_int " Richard Henderson
2021-05-08  1:47 ` [PATCH 65/72] softfloat: Convert integer to floatx80 " Richard Henderson
2021-05-08  1:47 ` [PATCH 66/72] softfloat: Convert floatx80 float conversions " Richard Henderson
2021-05-08  1:47 ` [PATCH 67/72] softfloat: Convert floatx80 to integer " Richard Henderson
2021-05-08  1:47 ` [PATCH 68/72] softfloat: Convert floatx80_scalbn " Richard Henderson
2021-05-08  1:47 ` [PATCH 69/72] softfloat: Convert floatx80 compare " Richard Henderson
2021-05-08  1:48 ` [PATCH 70/72] softfloat: Convert float32_exp2 " Richard Henderson
2021-05-08  1:48 ` [PATCH 71/72] softfloat: Move floatN_log2 to softfloat-parts.c.inc Richard Henderson
2021-05-08  1:48 ` [PATCH 72/72] softfloat: Convert modrem operations to FloatParts Richard Henderson
2021-05-08  2:52 ` [PATCH 00/72] Convert floatx80 and float128 " no-reply
2021-05-10 13:36 ` Alex Bennée
2021-05-12  1:52   ` Richard Henderson
2021-05-12 11:22     ` Alex Bennée
2021-05-12 15:28       ` Richard Henderson
2021-05-12 16:47 ` Alex Bennée
2021-05-12 19:23 ` Alex Bennée
2021-05-13 11:49   ` Richard Henderson
2021-05-13 13:33     ` Alex Bennée
2021-05-13 23:54       ` Richard Henderson
2021-05-13 14:13 ` Alex Bennée

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