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panfrost/midgard/disasm: Handle dest_override generalized

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Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
This commit is contained in:
Alyssa Rosenzweig
2019-05-01 02:00:08 +00:00
parent b6b534c733
commit f8c7ffa07a
1 changed files with 68 additions and 22 deletions
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90
src/gallium/drivers/panfrost/midgard/disassemble.c
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@@ -274,6 +274,70 @@ print_immediate(uint16_t imm)
printf("#%g", _mesa_half_to_float(imm));
}
static int
bits_for_mode(midgard_reg_mode mode)
{
switch (mode) {
case midgard_reg_mode_8:
return 8;
case midgard_reg_mode_16:
return 16;
case midgard_reg_mode_32:
return 32;
case midgard_reg_mode_64:
return 64;
default:
return 0;
}
}
static void
print_dest(unsigned reg, midgard_reg_mode mode, midgard_dest_override override, bool out_high)
{
bool overriden = override != midgard_dest_override_none;
bool overriden_up = override == midgard_dest_override_upper;
/* Depending on the mode and override, we determine the type of
* destination addressed. Absent an override, we address just the
* type of the operation itself, directly at the out_reg register
* (scaled if necessary to disambiguate, raised if necessary) */
unsigned bits = bits_for_mode(mode);
if (overriden)
bits /= 2;
/* Sanity check the override */
if (overriden) {
bool modeable = (mode == midgard_reg_mode_32) || (mode == midgard_reg_mode_16);
bool known = override != 0x3; /* Unused value */
bool uppable = !overriden_up || (mode == midgard_reg_mode_32);
if (!(modeable && known && uppable))
printf("/* do%d */ ", override);
}
switch (mode) {
case midgard_reg_mode_8:
case midgard_reg_mode_16:
reg = reg * 2 + out_high;
break;
case midgard_reg_mode_32:
if (overriden) {
reg = (reg * 2) + overriden_up;
}
break;
default:
break;
}
print_reg(reg, bits);
}
static void
print_vector_field(const char *name, uint16_t *words, uint16_t reg_word,
unsigned tabs)
@@ -329,29 +393,11 @@ print_vector_field(const char *name, uint16_t *words, uint16_t reg_word,
}
/* First, print the destination */
{
int out_reg = reg_info->out_reg;
unsigned bits = 32;
print_dest(reg_info->out_reg, mode, alu_field->dest_override, out_high);
if (alu_field->dest_override != midgard_dest_override_none) {
printf("/* do%d */ ", alu_field->dest_override);
}
if (mode == midgard_reg_mode_16) {
bits = 16;
out_reg *= 2;
out_reg += out_high;
} else if (mode == midgard_reg_mode_8) {
bits = 8;
out_reg *= 2;
out_reg += out_high;
} else if (mode == midgard_reg_mode_64) {
bits = 64;
/* TODO */
}
print_reg(out_reg, bits);
}
/* The semantics here are not totally grokked yet */
if (alu_field->dest_override == midgard_dest_override_upper)
out_high = true;
if (mask != 0xF) {
unsigned i;