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Re: [Qemu-devel] [PATCH v2 22/32] arm/translate-a64: add FP16 FNEG/FABS

From: Richard Henderson
Subject: Re: [Qemu-devel] [PATCH v2 22/32] arm/translate-a64: add FP16 FNEG/FABS to simd_two_reg_misc_fp16
Date: Thu, 8 Feb 2018 14:43:51 -0800
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.6.0 
On 02/08/2018 09:31 AM, Alex Bennée wrote:
> +            case 0x2f: /* FABS */
> +                gen_helper_advsimd_absh(tcg_res, tcg_op);
> +                break;
> +            case 0x6f: /* FNEG */
> +                tcg_gen_xori_i32(tcg_res, tcg_op, 0x8000);
> +                break;

Why is ABS a function call while NEG a bit operation?


r~
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