nir/lower_int64: lower 64-bit amul
Fixes an issue with Renderdoc's shader debugging with ACO.
If nir_opt_algebraic isn't called in-between nir_lower_explicit_io and
nir_lower_int64, we can end up with 64-bit multiplications.
Signed-off-by: Rhys Perry <pendingchaos02@gmail.com>
Reviewed-by: Daniel Schürmann <daniel@schuermann.dev>
Fixes: 6320e37d4be ('nir: add amul instruction')
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5709>
diff --git a/src/compiler/nir/nir_lower_int64.c b/src/compiler/nir/nir_lower_int64.c
index 7eb0ae5..6b4b28e 100644
--- a/src/compiler/nir/nir_lower_int64.c
+++ b/src/compiler/nir/nir_lower_int64.c
@@ -675,6 +675,7 @@
{
switch (opcode) {
case nir_op_imul:
+ case nir_op_amul:
return nir_lower_imul64;
case nir_op_imul_2x32_64:
case nir_op_umul_2x32_64:
@@ -759,6 +760,7 @@
switch (alu->op) {
case nir_op_imul:
+ case nir_op_amul:
return lower_imul64(b, src[0], src[1]);
case nir_op_imul_2x32_64:
return lower_mul_2x32_64(b, src[0], src[1], true);
@@ -864,11 +866,16 @@
}
}
+typedef struct {
+ const nir_shader_compiler_options *shader_options;
+ nir_lower_int64_options options;
+} should_lower_cb_data;
+
static bool
-should_lower_int64_alu_instr(const nir_instr *instr, const void *_options)
+should_lower_int64_alu_instr(const nir_instr *instr, const void *_data)
{
- const nir_lower_int64_options options =
- *(const nir_lower_int64_options *)_options;
+ const should_lower_cb_data *cb_data = (const should_lower_cb_data *)_data;
+ const nir_lower_int64_options options = cb_data->options;
if (instr->type != nir_instr_type_alu)
return false;
@@ -913,6 +920,13 @@
if (alu->src[0].src.ssa->bit_size != 64)
return false;
break;
+ case nir_op_amul:
+ assert(alu->dest.dest.is_ssa);
+ if (cb_data->shader_options->has_imul24)
+ return false;
+ if (alu->dest.dest.ssa.bit_size != 64)
+ return false;
+ break;
default:
assert(alu->dest.dest.is_ssa);
if (alu->dest.dest.ssa.bit_size != 64)
@@ -926,8 +940,12 @@
bool
nir_lower_int64(nir_shader *shader, nir_lower_int64_options options)
{
+ should_lower_cb_data cb_data;
+ cb_data.shader_options = shader->options;
+ cb_data.options = options;
+
return nir_shader_lower_instructions(shader,
should_lower_int64_alu_instr,
lower_int64_alu_instr,
- &options);
+ &cb_data);
}