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Diffstat (limited to 'src/mesa/shader/slang/slang_vartable.c')
-rw-r--r--src/mesa/shader/slang/slang_vartable.c59
1 files changed, 20 insertions, 39 deletions
diff --git a/src/mesa/shader/slang/slang_vartable.c b/src/mesa/shader/slang/slang_vartable.c
index de0c93957b4..a4ebacc0936 100644
--- a/src/mesa/shader/slang/slang_vartable.c
+++ b/src/mesa/shader/slang/slang_vartable.c
@@ -4,6 +4,7 @@
#include "shader/prog_print.h"
#include "slang_compile.h"
#include "slang_compile_variable.h"
+#include "slang_emit.h"
#include "slang_mem.h"
#include "slang_vartable.h"
#include "slang_ir.h"
@@ -72,9 +73,8 @@ _slang_delete_var_table(slang_var_table *vt)
/**
- * Create new table, put at head, return ptr to it.
- * XXX we should take a maxTemps parameter to indicate how many temporaries
- * are available for the current shader/program target.
+ * Create new table on top of vartable stack.
+ * Used when we enter a {} block.
*/
void
_slang_push_var_table(slang_var_table *vt)
@@ -95,7 +95,8 @@ _slang_push_var_table(slang_var_table *vt)
/**
- * Destroy given table, return ptr to Parent
+ * Pop top entry from variable table.
+ * Used when we leave a {} block.
*/
void
_slang_pop_var_table(slang_var_table *vt)
@@ -125,10 +126,12 @@ _slang_pop_var_table(slang_var_table *vt)
else
comp = 0;
- assert(store->Index >= 0);
- for (j = 0; j < store->Size; j++) {
- assert(t->Temps[store->Index * 4 + j + comp] == VAR);
- t->Temps[store->Index * 4 + j + comp] = FREE;
+ /* store->Index may be -1 if we run out of registers */
+ if (store->Index >= 0) {
+ for (j = 0; j < store->Size; j++) {
+ assert(t->Temps[store->Index * 4 + j + comp] == VAR);
+ t->Temps[store->Index * 4 + j + comp] = FREE;
+ }
}
store->Index = -1;
}
@@ -156,7 +159,7 @@ _slang_pop_var_table(slang_var_table *vt)
/**
- * Add a new variable to the given symbol table.
+ * Add a new variable to the given var/symbol table.
*/
void
_slang_add_variable(slang_var_table *vt, slang_variable *v)
@@ -214,6 +217,7 @@ alloc_reg(slang_var_table *vt, GLint size, GLboolean isTemp)
for (i = 0; i <= vt->MaxRegisters * 4 - size; i += step) {
GLuint found = 0;
for (j = 0; j < (GLuint) size; j++) {
+ assert(i + j < 4 * MAX_PROGRAM_TEMPS);
if (i + j < vt->MaxRegisters * 4 && t->Temps[i + j] == FREE) {
found++;
}
@@ -225,13 +229,17 @@ alloc_reg(slang_var_table *vt, GLint size, GLboolean isTemp)
/* found block of size free regs */
if (size > 1)
assert(i % 4 == 0);
- for (j = 0; j < (GLuint) size; j++)
+ for (j = 0; j < (GLuint) size; j++) {
+ assert(i + j < 4 * MAX_PROGRAM_TEMPS);
t->Temps[i + j] = isTemp ? TEMP : VAR;
+ }
assert(i < MAX_PROGRAM_TEMPS * 4);
t->ValSize[i] = size;
return i;
}
}
+
+ /* if we get here, we ran out of registers */
return -1;
}
@@ -259,21 +267,7 @@ _slang_alloc_var(slang_var_table *vt, slang_ir_storage *store)
return GL_FALSE;
store->Index = i / 4;
- if (store->Size == 1) {
- const GLuint comp = i % 4;
- store->Swizzle = MAKE_SWIZZLE4(comp, comp, comp, comp);
- }
- else if (store->Size == 2) {
- store->Swizzle = MAKE_SWIZZLE4(SWIZZLE_X, SWIZZLE_Y,
- SWIZZLE_NIL, SWIZZLE_NIL);
- }
- else if (store->Size == 3) {
- store->Swizzle = MAKE_SWIZZLE4(SWIZZLE_X, SWIZZLE_Y,
- SWIZZLE_Z, SWIZZLE_NIL);
- }
- else {
- store->Swizzle = SWIZZLE_NOOP;
- }
+ store->Swizzle = _slang_var_swizzle(store->Size, i % 4);
if (dbg)
printf("Alloc var storage sz %d at %d.%s (level %d) store %p\n",
@@ -301,20 +295,7 @@ _slang_alloc_temp(slang_var_table *vt, slang_ir_storage *store)
assert(store->Index < 0);
store->Index = i / 4;
- if (store->Size == 1) {
- const GLuint comp = i % 4;
- store->Swizzle = MAKE_SWIZZLE4(comp, comp, comp, comp);
- }
- else {
- /* XXX improve swizzled for size=2/3, use for writemask... */
-#if 1
- if (store->Size == 2) {
- store->Swizzle = MAKE_SWIZZLE4(SWIZZLE_X, SWIZZLE_Y,
- SWIZZLE_NIL, SWIZZLE_NIL);
- }
-#endif
- store->Swizzle = SWIZZLE_NOOP;
- }
+ store->Swizzle = _slang_var_swizzle(store->Size, i % 4);
if (dbg) printf("Alloc temp sz %d at %d.%s (level %d) store %p\n",
store->Size, store->Index,