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intel/eu: Just modify the offset in brw_broadcast

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This means we have to drop const from a variable but it also means that
100% of the code which deals with the offset limit is in one place.

Reviewed-by: Iago Toral Quiroga <itoral@igalia.com>
This commit is contained in:
Jason Ekstrand
2017-10-17 14:16:31 -07:00
parent e3bcc86133
commit 068beb41d8
1 changed files with 5 additions and 4 deletions
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9
src/intel/compiler/brw_eu_emit.c
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@@ -3404,7 +3404,7 @@ brw_broadcast(struct brw_codegen *p,
if (align1) {
const struct brw_reg addr =
retype(brw_address_reg(0), BRW_REGISTER_TYPE_UD);
const unsigned offset = src.nr * REG_SIZE + src.subnr;
unsigned offset = src.nr * REG_SIZE + src.subnr;
/* Limit in bytes of the signed indirect addressing immediate. */
const unsigned limit = 512;
@@ -3422,15 +3422,16 @@ brw_broadcast(struct brw_codegen *p,
* addressing immediate, account for the difference if the source
* register is above this limit.
*/
if (offset >= limit)
if (offset >= limit) {
brw_ADD(p, addr, addr, brw_imm_ud(offset - offset % limit));
offset = offset % limit;
}
brw_pop_insn_state(p);
/* Use indirect addressing to fetch the specified component. */
brw_MOV(p, dst,
retype(brw_vec1_indirect(addr.subnr, offset % limit),
src.type));
retype(brw_vec1_indirect(addr.subnr, offset), src.type));
} else {
/* In SIMD4x2 mode the index can be either zero or one, replicate it
* to all bits of a flag register,