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authorAlyssa Rosenzweig <[email protected]>2019-05-01 02:00:08 +0000
committerAlyssa Rosenzweig <[email protected]>2019-05-04 19:08:50 +0000
commitf8c7ffa07a2b938f99f656fbc4f7fe1baa9eeafe (patch)
treed7974f54d52abc73c119f59ab6cdfff2dd05815b /src/gallium/drivers
parentb6b534c73366eff8570c15183ed617575295f4b7 (diff)
panfrost/midgard/disasm: Handle dest_override generalized
Signed-off-by: Alyssa Rosenzweig <[email protected]>
Diffstat (limited to 'src/gallium/drivers')
-rw-r--r--src/gallium/drivers/panfrost/midgard/disassemble.c90
1 files changed, 68 insertions, 22 deletions
diff --git a/src/gallium/drivers/panfrost/midgard/disassemble.c b/src/gallium/drivers/panfrost/midgard/disassemble.c
index 8466a90b8d6..c893bc89a6c 100644
--- a/src/gallium/drivers/panfrost/midgard/disassemble.c
+++ b/src/gallium/drivers/panfrost/midgard/disassemble.c
@@ -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;
-
- 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_dest(reg_info->out_reg, mode, alu_field->dest_override, out_high);
- 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;