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radeonsi: use shifts for sign extension

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Avoids a branch and reduces code size a tiny bit:
    text   data     bss      dec    hex filename
10804563 398653 2070368 13273584 ca89f0 /tmp/radeonsi_dri.so.old
10804499 398653 2070368 13273520 ca89b0 /tmp/radeonsi_dri.so

Reviewed-by: Marek Olšák <marek.olsak@amd.com>
This commit is contained in:
Grazvydas Ignotas 2018-06-16 21:56:13 +03:00
parent af17a29ad8
commit 4e0d93dc0e
1 changed files with 2 additions and 2 deletions
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4
src/gallium/drivers/radeonsi/si_descriptors.c
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@ -100,8 +100,8 @@ static uint64_t si_desc_extract_buffer_address(const uint32_t *desc)
((uint64_t)G_008F04_BASE_ADDRESS_HI(desc[1]) << 32);
/* Sign-extend the 48-bit address. */
if (va & (1ull << 47))
va |= 0xffffull << 48;
va <<= 16;
va = (int64_t)va >> 16;
return va;
}