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Date: Tue, 22 Oct 2013 07:31:30 +0100
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Subject: Re: [Qemu-devel] [v2 07/13] Add VSX Scalar Move Instructions
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To: Tom Musta <tommusta@gmail.com>
Cc: qemu-ppc@nongnu.org, qemu-devel@nongnu.org

Il 11/10/2013 14:02, Tom Musta ha scritto:
> 
> +            case OP_CPSGN: {                                      \
> +                TCGv_i64 xa = tcg_temp_new();                     \
> +                tcg_gen_mov_i64(xa, cpu_vsrh(xA(ctx->opcode)));   \
> +                tcg_gen_andi_i64(xa, xa, (sgn_mask));             \
> +                tcg_gen_andi_i64(xb, xb, ~(sgn_mask));            \
> +                tcg_gen_or_i64(xb, xb, xa);                       \
> +                tcg_temp_free(xa);                                \
> +                break;                                            \

You might get slightly better generated code if you move the sgn_mask
immediate to a temporary and then use and+andc.

Paolo