From: Richard Henderson <richard.henderson@linaro.org>
To: "Alex Bennée" <alex.bennee@linaro.org>,
"Peter Maydell" <peter.maydell@linaro.org>
Cc: Laurent Vivier <laurent@vivier.eu>,
bharata@linux.vnet.ibm.com,
Andrew Dutcher <andrew@andrewdutcher.com>,
QEMU Developers <qemu-devel@nongnu.org>,
Aurelien Jarno <aurelien@aurel32.net>
Subject: Re: [Qemu-devel] [PATCH v2 11/20] fpu/softfloat: re-factor add/sub
Date: Thu, 18 Jan 2018 08:47:57 -0800 [thread overview]
Message-ID: <eb388d43-c72a-8bb2-ab90-732b53fe7fce@linaro.org> (raw)
In-Reply-To: <87r2qnnmlx.fsf@linaro.org>
On 01/18/2018 08:43 AM, Alex Bennée wrote:
> /* Expand fields based on the size of exponent and fraction */
> #define FRAC_PARAMS(E, F) \
> .exp_size = E, \
> .frac_size = F, \
> .frac_shift = DECOMPOSED_BINARY_POINT - F, \
> .frac_lsb = 1ull << (DECOMPOSED_BINARY_POINT - F), \
> .frac_lsbm1 = 1ull << ((DECOMPOSED_BINARY_POINT - F) - 1), \
> .round_mask = (1ull << (DECOMPOSED_BINARY_POINT - F)) - 1, \
> .roundeven_mask = (2ull << (DECOMPOSED_BINARY_POINT - F)) - 1
>
> static const FloatFmt float16_params = {
> .exp_bias = 0x0f,
> .exp_max = 0x1f,
> FRAC_PARAMS(5, 10)
> };
You can compute exp_bias and exp_max from E as well.
r~
next prev parent reply other threads:[~2018-01-18 16:48 UTC|newest]
Thread overview: 68+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-09 12:22 [Qemu-devel] [PATCH v2 00/20] re-factor softfloat and add fp16 functions Alex Bennée
2018-01-09 12:22 ` [Qemu-devel] [PATCH v2 01/20] fpu/softfloat: implement float16_squash_input_denormal Alex Bennée
2018-01-12 13:41 ` Peter Maydell
2018-01-09 12:22 ` [Qemu-devel] [PATCH v2 02/20] include/fpu/softfloat: remove USE_SOFTFLOAT_STRUCT_TYPES Alex Bennée
2018-01-09 12:27 ` Laurent Vivier
2018-01-09 14:12 ` Aurelien Jarno
2018-01-09 14:14 ` Peter Maydell
2018-01-09 14:20 ` Laurent Vivier
2018-01-09 14:43 ` Peter Maydell
2018-01-09 16:45 ` Richard Henderson
2018-01-09 15:25 ` Alex Bennée
2018-01-09 12:22 ` [Qemu-devel] [PATCH v2 03/20] include/fpu/softfloat: implement float16_abs helper Alex Bennée
2018-01-12 13:42 ` Peter Maydell
2018-01-09 12:22 ` [Qemu-devel] [PATCH v2 04/20] include/fpu/softfloat: implement float16_chs helper Alex Bennée
2018-01-12 13:43 ` Peter Maydell
2018-01-09 12:22 ` [Qemu-devel] [PATCH v2 05/20] include/fpu/softfloat: implement float16_set_sign helper Alex Bennée
2018-01-12 13:43 ` Peter Maydell
2018-01-09 12:22 ` [Qemu-devel] [PATCH v2 06/20] include/fpu/softfloat: add some float16 constants Alex Bennée
2018-01-09 13:27 ` Philippe Mathieu-Daudé
2018-01-09 15:16 ` Alex Bennée
2018-01-12 13:47 ` Peter Maydell
2018-01-09 12:22 ` [Qemu-devel] [PATCH v2 07/20] fpu/softfloat: propagate signalling NaNs in MINMAX Alex Bennée
2018-01-12 14:04 ` Peter Maydell
2018-01-16 11:31 ` Alex Bennée
2018-01-16 11:53 ` Alex Bennée
2018-01-09 12:22 ` [Qemu-devel] [PATCH v2 08/20] fpu/softfloat: improve comments on ARM NaN propagation Alex Bennée
2018-01-12 14:07 ` Peter Maydell
2018-01-09 12:22 ` [Qemu-devel] [PATCH v2 09/20] fpu/softfloat: move the extract functions to the top of the file Alex Bennée
2018-01-12 14:07 ` Peter Maydell
2018-01-09 12:22 ` [Qemu-devel] [PATCH v2 10/20] fpu/softfloat: define decompose structures Alex Bennée
2018-01-09 17:01 ` Richard Henderson
2018-01-12 14:22 ` Peter Maydell
2018-01-12 16:21 ` Philippe Mathieu-Daudé
2018-01-18 13:08 ` Alex Bennée
2018-01-18 14:26 ` Philippe Mathieu-Daudé
2018-01-18 14:31 ` Peter Maydell
2018-01-18 14:59 ` Philippe Mathieu-Daudé
2018-01-18 15:17 ` Peter Maydell
2018-01-23 12:00 ` Alex Bennée
2018-01-09 12:22 ` [Qemu-devel] [PATCH v2 11/20] fpu/softfloat: re-factor add/sub Alex Bennée
2018-01-12 15:57 ` Peter Maydell
2018-01-12 18:30 ` Richard Henderson
2018-01-18 16:43 ` Alex Bennée
2018-01-18 16:47 ` Richard Henderson [this message]
2018-01-23 20:05 ` Alex Bennée
2018-01-09 12:22 ` [Qemu-devel] [PATCH v2 12/20] fpu/softfloat: re-factor mul Alex Bennée
2018-01-09 12:43 ` Philippe Mathieu-Daudé
2018-01-12 16:17 ` Peter Maydell
2018-01-16 10:16 ` Alex Bennée
2018-01-09 12:22 ` [Qemu-devel] [PATCH v2 13/20] fpu/softfloat: re-factor div Alex Bennée
2018-01-12 16:22 ` Peter Maydell
2018-01-12 18:35 ` Richard Henderson
2018-01-09 12:22 ` [Qemu-devel] [PATCH v2 14/20] fpu/softfloat: re-factor muladd Alex Bennée
2018-02-13 15:15 ` Peter Maydell
2018-01-09 12:22 ` [Qemu-devel] [PATCH v2 15/20] fpu/softfloat: re-factor round_to_int Alex Bennée
2018-01-09 12:22 ` [Qemu-devel] [PATCH v2 16/20] fpu/softfloat: re-factor float to int/uint Alex Bennée
2018-01-09 17:12 ` Richard Henderson
2018-01-12 16:36 ` Peter Maydell
2018-01-16 17:06 ` Alex Bennée
2018-01-09 12:22 ` [Qemu-devel] [PATCH v2 17/20] fpu/softfloat: re-factor int/uint to float Alex Bennée
2018-01-09 12:22 ` [Qemu-devel] [PATCH v2 18/20] fpu/softfloat: re-factor scalbn Alex Bennée
2018-01-12 16:31 ` Peter Maydell
2018-01-24 12:03 ` Alex Bennée
2018-01-09 12:22 ` [Qemu-devel] [PATCH v2 19/20] fpu/softfloat: re-factor minmax Alex Bennée
2018-01-09 17:16 ` Richard Henderson
2018-01-09 12:22 ` [Qemu-devel] [PATCH v2 20/20] fpu/softfloat: re-factor compare Alex Bennée
2018-01-09 17:18 ` Richard Henderson
2018-01-09 13:07 ` [Qemu-devel] [PATCH v2 00/20] re-factor softfloat and add fp16 functions no-reply
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=eb388d43-c72a-8bb2-ab90-732b53fe7fce@linaro.org \
--to=richard.henderson@linaro.org \
--cc=alex.bennee@linaro.org \
--cc=andrew@andrewdutcher.com \
--cc=aurelien@aurel32.net \
--cc=bharata@linux.vnet.ibm.com \
--cc=laurent@vivier.eu \
--cc=peter.maydell@linaro.org \
--cc=qemu-devel@nongnu.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).