From: Richard Henderson <richard.henderson@linaro.org>
To: Taylor Simpson <tsimpson@quicinc.com>, qemu-devel@nongnu.org
Cc: ale@rev.ng, bcain@quicinc.com, philmd@redhat.com
Subject: Re: [PATCH v2 13/21] Hexagon (target/hexagon) add F2_sfinvsqrta
Date: Tue, 6 Apr 2021 13:47:17 -0700 [thread overview]
Message-ID: <c4e9282f-e42a-28d1-2ef7-94a0ae2ae001@linaro.org> (raw)
In-Reply-To: <1617249213-22667-14-git-send-email-tsimpson@quicinc.com>
On 3/31/21 8:53 PM, Taylor Simpson wrote:
> +int arch_invsqrt_lookup(int index)
> +{
> + index &= 0x7f;
> + const uint8_t roundrom[128] = {
> + 0x069, 0x066, 0x063, 0x061, 0x05e, 0x05b, 0x059, 0x057,
> + 0x054, 0x052, 0x050, 0x04d, 0x04b, 0x049, 0x047, 0x045,
> + 0x043, 0x041, 0x03f, 0x03d, 0x03b, 0x039, 0x037, 0x036,
> + 0x034, 0x032, 0x030, 0x02f, 0x02d, 0x02c, 0x02a, 0x028,
> + 0x027, 0x025, 0x024, 0x022, 0x021, 0x01f, 0x01e, 0x01d,
> + 0x01b, 0x01a, 0x019, 0x017, 0x016, 0x015, 0x014, 0x012,
> + 0x011, 0x010, 0x00f, 0x00d, 0x00c, 0x00b, 0x00a, 0x009,
> + 0x008, 0x007, 0x006, 0x005, 0x004, 0x003, 0x002, 0x001,
> + 0x0fe, 0x0fa, 0x0f6, 0x0f3, 0x0ef, 0x0eb, 0x0e8, 0x0e4,
> + 0x0e1, 0x0de, 0x0db, 0x0d7, 0x0d4, 0x0d1, 0x0ce, 0x0cb,
> + 0x0c9, 0x0c6, 0x0c3, 0x0c0, 0x0be, 0x0bb, 0x0b8, 0x0b6,
> + 0x0b3, 0x0b1, 0x0af, 0x0ac, 0x0aa, 0x0a8, 0x0a5, 0x0a3,
> + 0x0a1, 0x09f, 0x09d, 0x09b, 0x099, 0x097, 0x095, 0x093,
> + 0x091, 0x08f, 0x08d, 0x08b, 0x089, 0x087, 0x086, 0x084,
> + 0x082, 0x080, 0x07f, 0x07d, 0x07b, 0x07a, 0x078, 0x077,
> + 0x075, 0x074, 0x072, 0x071, 0x06f, 0x06e, 0x06c, 0x06b,
> + };
> + return roundrom[index];
> +};
Similar commentary as for recip, but otherwise,
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
r~
next prev parent reply other threads:[~2021-04-06 20:55 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-01 3:53 [PATCH v2 00/21] Hexagon (target/hexagon) update Taylor Simpson
2021-04-01 3:53 ` [PATCH v2 01/21] Hexagon (target/hexagon) TCG generation cleanup Taylor Simpson
2021-04-02 17:25 ` Richard Henderson
2021-04-02 17:46 ` Richard Henderson
2021-04-02 19:42 ` Taylor Simpson
2021-04-02 20:00 ` Richard Henderson
2021-04-01 3:53 ` [PATCH v2 02/21] Hexagon (target/hexagon) remove unnecessary inline directives Taylor Simpson
2021-04-02 17:26 ` Richard Henderson
2021-04-01 3:53 ` [PATCH v2 03/21] Hexagon (target/hexagon) use env_archcpu and env_cpu Taylor Simpson
2021-04-02 17:27 ` Richard Henderson
2021-04-01 3:53 ` [PATCH v2 04/21] Hexagon (target/hexagon) properly generate TB end for DISAS_NORETURN Taylor Simpson
2021-04-02 17:34 ` Richard Henderson
2021-04-01 3:53 ` [PATCH v2 05/21] Hexagon (target/hexagon) decide if pred has been written at TCG gen time Taylor Simpson
2021-04-02 17:44 ` Richard Henderson
2021-04-01 3:53 ` [PATCH v2 06/21] Hexagon (target/hexagon) change variables from int to bool when appropriate Taylor Simpson
2021-04-01 3:53 ` [PATCH v2 07/21] Hexagon (target/hexagon) remove unused carry_from_add64 function Taylor Simpson
2021-04-01 3:53 ` [PATCH v2 08/21] Hexagon (target/hexagon) change type of softfloat_roundingmodes Taylor Simpson
2021-04-01 3:53 ` [PATCH v2 09/21] Hexagon (target/hexagon) use softfloat default NaN and tininess Taylor Simpson
2021-04-02 17:48 ` Richard Henderson
2021-04-01 3:53 ` [PATCH v2 10/21] Hexagon (target/hexagon) replace float32_mul_pow2 with float32_scalbn Taylor Simpson
2021-04-01 3:53 ` [PATCH v2 11/21] Hexagon (target/hexagon) use softfloat for float-to-int conversions Taylor Simpson
2021-04-06 20:09 ` Richard Henderson
2021-04-01 3:53 ` [PATCH v2 12/21] Hexagon (target/hexagon) add F2_sfrecipa instruction Taylor Simpson
2021-04-06 20:30 ` Richard Henderson
2021-04-06 20:46 ` Richard Henderson
2021-04-06 21:55 ` Taylor Simpson
2021-04-06 22:13 ` Richard Henderson
2021-04-01 3:53 ` [PATCH v2 13/21] Hexagon (target/hexagon) add F2_sfinvsqrta Taylor Simpson
2021-04-06 20:47 ` Richard Henderson [this message]
2021-04-01 3:53 ` [PATCH v2 14/21] Hexagon (target/hexagon) add A5_ACS (vacsh) Taylor Simpson
2021-04-06 20:51 ` Richard Henderson
2021-04-06 21:31 ` Taylor Simpson
2021-04-01 3:53 ` [PATCH v2 15/21] Hexagon (target/hexagon) add A6_vminub_RdP Taylor Simpson
2021-04-06 20:57 ` Richard Henderson
2021-04-01 3:53 ` [PATCH v2 16/21] Hexagon (target/hexagon) add A4_addp_c/A4_subp_c Taylor Simpson
2021-04-06 21:11 ` Richard Henderson
2021-04-06 21:58 ` Taylor Simpson
2021-04-01 3:53 ` [PATCH v2 17/21] Hexagon (target/hexagon) circular addressing Taylor Simpson
2021-04-06 22:11 ` Richard Henderson
2021-04-07 3:11 ` Taylor Simpson
2021-04-07 16:27 ` Taylor Simpson
2021-04-01 3:53 ` [PATCH v2 18/21] Hexagon (target/hexagon) bit reverse (brev) addressing Taylor Simpson
2021-04-06 22:35 ` Richard Henderson
2021-04-01 3:53 ` [PATCH v2 19/21] Hexagon (target/hexagon) load and unpack bytes instructions Taylor Simpson
2021-04-06 22:46 ` Richard Henderson
2021-04-01 3:53 ` [PATCH v2 20/21] Hexagon (target/hexagon) load into shifted register instructions Taylor Simpson
2021-04-06 22:50 ` Richard Henderson
2021-04-01 3:53 ` [PATCH v2 21/21] Hexagon (target/hexagon) CABAC decode bin Taylor Simpson
2021-04-06 22:54 ` Richard Henderson
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