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aco: add and use constantValue16()

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Signed-off-by: Rhys Perry <pendingchaos02@gmail.com>
Reviewed-by: Daniel Schürmann <daniel@schuermann.dev>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/16296>
This commit is contained in:
Rhys Perry
2022-04-29 16:45:17 +01:00
committed by Marge Bot
parent 154929d731
commit f937c5be7c
2 changed files with 18 additions and 8 deletions
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13
src/amd/compiler/aco_ir.h
View File

@@ -795,6 +795,19 @@ public:
}
}
/* Value if this were used with vop3/opsel or vop3p. */
constexpr uint16_t constantValue16(bool opsel) const noexcept
{
assert(bytes() == 2 || bytes() == 4);
if (opsel) {
if (bytes() == 2 && int16_t(data_.i) >= -16 && int16_t(data_.i) <= 64 && !isLiteral())
return int16_t(data_.i) >> 16; /* 16-bit inline integers are sign-extended, even with fp16 instrs */
else
return data_.i >> 16;
}
return data_.i;
}
constexpr bool isOfType(RegType type) const noexcept
{
return hasRegClass() && regClass().type() == type;

13
src/amd/compiler/aco_optimizer.cpp
View File

@@ -201,7 +201,8 @@ struct ssa_info {
val = constant;
/* check that no upper bits are lost in case of packed 16bit constants */
if (gfx_level >= GFX8 && !op16.isLiteral() && op16.constantValue64() == constant)
if (gfx_level >= GFX8 && !op16.isLiteral() &&
op16.constantValue16(true) == ((constant >> 16) & 0xffff))
add_label(label_constant_16bit);
if (!op32.isLiteral())
@@ -2841,11 +2842,12 @@ combine_clamp(opt_ctx& ctx, aco_ptr<Instruction>& instr, aco_opcode min, aco_opc
uint32_t const0 = 0, const1 = 0;
for (int i = 0; i < 3; i++) {
uint32_t val;
bool hi16 = opsel & (1 << i);
if (operands[i].isConstant()) {
val = operands[i].constantValue();
val = hi16 ? operands[i].constantValue16(true) : operands[i].constantValue();
} else if (operands[i].isTemp() &&
ctx.info[operands[i].tempId()].is_constant_or_literal(32)) {
val = ctx.info[operands[i].tempId()].val;
val = ctx.info[operands[i].tempId()].val >> (hi16 ? 16 : 0);
} else {
continue;
}
@@ -2860,11 +2862,6 @@ combine_clamp(opt_ctx& ctx, aco_ptr<Instruction>& instr, aco_opcode min, aco_opc
if (const0_idx < 0 || const1_idx < 0)
continue;
if (opsel & (1 << const0_idx))
const0 >>= 16;
if (opsel & (1 << const1_idx))
const1 >>= 16;
int lower_idx = const0_idx;
switch (min) {
case aco_opcode::v_min_f32: