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i965: Allow immediates to be folded into logical and shift instructions. 

These instructions will be used with immediate arguments in the upcoming
ldexp lowering pass and frexp implementation.

v2: Add vec4 support as well.
Reviewed-by: Paul Berry <stereotype441@gmail.com>
This commit is contained in:
Matt Turner 2013-08-05 15:17:04 -07:00
parent d83221c2d3
commit 89f5f675ad
2 changed files with 22 additions and 0 deletions
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11
src/mesa/drivers/dri/i965/brw_fs_copy_propagation.cpp
View File

@ -341,9 +341,20 @@ fs_visitor::try_constant_propagate(fs_inst *inst, acp_entry *entry)
progress = true;
break;
case BRW_OPCODE_SHL:
case BRW_OPCODE_SHR:
if (i == 1) {
inst->src[i] = entry->src;
progress = true;
}
break;
case BRW_OPCODE_MACH:
case BRW_OPCODE_MUL:
case BRW_OPCODE_ADD:
case BRW_OPCODE_OR:
case BRW_OPCODE_AND:
case BRW_OPCODE_XOR:
if (i == 1) {
inst->src[i] = entry->src;
progress = true;

11
src/mesa/drivers/dri/i965/brw_vec4_copy_propagation.cpp
View File

@ -95,9 +95,20 @@ try_constant_propagation(vec4_instruction *inst, int arg, src_reg *values[4])
inst->src[arg] = value;
return true;
case BRW_OPCODE_SHL:
case BRW_OPCODE_SHR:
if (arg == 1) {
inst->src[arg] = value;
return true;
}
break;
case BRW_OPCODE_MACH:
case BRW_OPCODE_MUL:
case BRW_OPCODE_ADD:
case BRW_OPCODE_OR:
case BRW_OPCODE_AND:
case BRW_OPCODE_XOR:
if (arg == 1) {
inst->src[arg] = value;
return true;