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i965: Make a "does this while jump before our instruction?" helper.

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I need to use this in an additional place.

Cc: mesa-stable@lists.freedesktop.org
Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Francisco Jerez <currojerez@riseup.net>
This commit is contained in:
Kenneth Graunke 2016-05-14 23:53:19 -07:00
parent b6f250d7f2
commit 2f02fad6b3
1 changed files with 12 additions and 4 deletions
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16
src/mesa/drivers/dri/i965/brw_eu_emit.c
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@ -2655,6 +2655,17 @@ brw_send_indirect_surface_message(struct brw_codegen *p,
return insn;
}
static bool
while_jumps_before_offset(const struct brw_device_info *devinfo,
brw_inst *insn, int while_offset, int start_offset)
{
int scale = 16 / brw_jump_scale(devinfo);
int jip = devinfo->gen == 6 ? brw_inst_gen6_jump_count(devinfo, insn)
: brw_inst_jip(devinfo, insn);
return while_offset + jip * scale <= start_offset;
}
static int
brw_find_next_block_end(struct brw_codegen *p, int start_offset)
{
@ -2698,7 +2709,6 @@ brw_find_loop_end(struct brw_codegen *p, int start_offset)
{
const struct brw_device_info *devinfo = p->devinfo;
int offset;
int scale = 16 / brw_jump_scale(devinfo);
void *store = p->store;
assert(devinfo->gen >= 6);
@ -2712,9 +2722,7 @@ brw_find_loop_end(struct brw_codegen *p, int start_offset)
brw_inst *insn = store + offset;
if (brw_inst_opcode(devinfo, insn) == BRW_OPCODE_WHILE) {
int jip = devinfo->gen == 6 ? brw_inst_gen6_jump_count(devinfo, insn)
: brw_inst_jip(devinfo, insn);
if (offset + jip * scale <= start_offset)
if (while_jumps_before_offset(devinfo, insn, offset, start_offset))
return offset;
}
}