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i965/vec4: add a byte_offset helper

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v2: wrap the helper in a namespace to make clear that it is an
    implementation detail of byte_offset() and is not intended
    to be used independently (Curro).

Reviewed-by: Francisco Jerez <currojerez@riseup.net>
This commit is contained in:
Iago Toral Quiroga 2016-10-03 13:24:22 +02:00
parent 173558445d
commit 5a4ce9f9a7
1 changed files with 50 additions and 0 deletions
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50
src/mesa/drivers/dri/i965/brw_ir_vec4.h
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@ -60,6 +60,49 @@ retype(src_reg reg, enum brw_reg_type type)
return reg;
}
namespace detail {
static inline void
add_byte_offset(backend_reg *reg, unsigned bytes)
{
switch (reg->file) {
case BAD_FILE:
break;
case VGRF:
case ATTR:
case UNIFORM:
reg->offset += bytes;
assert(reg->offset % 16 == 0);
break;
case MRF: {
const unsigned suboffset = reg->offset + bytes;
reg->nr += suboffset / REG_SIZE;
reg->offset = suboffset % REG_SIZE;
assert(reg->offset % 16 == 0);
break;
}
case ARF:
case FIXED_GRF: {
const unsigned suboffset = reg->subnr + bytes;
reg->nr += suboffset / REG_SIZE;
reg->subnr = suboffset % REG_SIZE;
assert(reg->subnr % 16 == 0);
break;
}
default:
assert(bytes == 0);
}
}
} /* namepace detail */
static inline src_reg
byte_offset(src_reg reg, unsigned bytes)
{
detail::add_byte_offset(&reg, bytes);
return reg;
}
static inline src_reg
offset(src_reg reg, unsigned delta)
{
@ -129,6 +172,13 @@ retype(dst_reg reg, enum brw_reg_type type)
return reg;
}
static inline dst_reg
byte_offset(dst_reg reg, unsigned bytes)
{
detail::add_byte_offset(&reg, bytes);
return reg;
}
static inline dst_reg
offset(dst_reg reg, unsigned delta)
{