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-rw-r--r--src/mesa/shader/slang/slang_codegen.c88
-rw-r--r--src/mesa/shader/slang/slang_emit.c72
-rw-r--r--src/mesa/shader/slang/slang_ir.h2
3 files changed, 156 insertions, 6 deletions
diff --git a/src/mesa/shader/slang/slang_codegen.c b/src/mesa/shader/slang/slang_codegen.c
index 72f58a9ebd1..2dd9ccc6fdc 100644
--- a/src/mesa/shader/slang/slang_codegen.c
+++ b/src/mesa/shader/slang/slang_codegen.c
@@ -47,6 +47,8 @@
#include "slang_print.h"
+static GLboolean UseHighLevelInstructions = GL_TRUE;
+
static slang_ir_node *
_slang_gen_operation(slang_assemble_ctx * A, slang_operation *oper);
@@ -506,6 +508,7 @@ new_node(slang_ir_opcode op, slang_ir_node *left, slang_ir_node *right)
n->Children[0] = left;
n->Children[1] = right;
n->Writemask = WRITEMASK_XYZW;
+ n->InstLocation = -1;
}
return n;
}
@@ -567,6 +570,26 @@ new_jump(slang_atom target)
}
+static slang_ir_node *
+new_begin_loop(void)
+{
+ slang_ir_node *n = new_node(IR_BEGIN_LOOP, NULL, NULL);
+ return n;
+}
+
+
+static slang_ir_node *
+new_end_loop(slang_ir_node *beginNode)
+{
+ slang_ir_node *n = new_node(IR_END_LOOP, NULL, NULL);
+ assert(beginNode);
+ if (n) {
+ n->BranchNode = beginNode;
+ }
+ return n;
+}
+
+
/**
* New IR_VAR node - a reference to a previously declared variable.
*/
@@ -1304,7 +1327,7 @@ _slang_gen_function_call_name(slang_assemble_ctx *A, const char *name,
/**
- * Generate IR tree for a while-loop.
+ * Generate IR tree for a while-loop. Use BRA-nch instruction.
*/
static slang_ir_node *
_slang_gen_while(slang_assemble_ctx * A, const slang_operation *oper)
@@ -1313,7 +1336,7 @@ _slang_gen_while(slang_assemble_ctx * A, const slang_operation *oper)
* label "__startWhile"
* eval expr (child[0]), updating condcodes
* branch if false to "__endWhile"
- * code body
+ * body code
* jump "__startWhile"
* label "__endWhile"
*/
@@ -1354,6 +1377,51 @@ _slang_gen_while(slang_assemble_ctx * A, const slang_operation *oper)
/**
+ * Generate IR tree for a while-loop using high-level BGNLOOP/ENDLOOP,
+ * IF/ENDIF instructions.
+ */
+static slang_ir_node *
+_slang_gen_hl_while(slang_assemble_ctx * A, const slang_operation *oper)
+{
+ /*
+ * BGNLOOP
+ * eval expr (child[0]), updating condcodes
+ * IF !expr THEN
+ * BRK
+ * ENDIF
+ * body code
+ * ENDLOOP
+ */
+ slang_ir_node *beginLoop, *endLoop, *ifThen, *endif;
+ slang_ir_node *brk, *cond, *body, *tree;
+
+ beginLoop = new_begin_loop();
+
+ cond = _slang_gen_operation(A, &oper->children[0]);
+ cond = new_node(IR_NOT, cond, NULL);
+ cond = _slang_gen_cond(cond);
+
+ ifThen = new_node(IR_IF, cond, NULL);
+ tree = new_seq(beginLoop, ifThen);
+
+ brk = new_node(IR_BREAK, NULL, NULL);
+ tree = new_seq(tree, brk);
+
+ endif = new_node(IR_ENDIF, NULL, NULL);
+ tree = new_seq(tree, endif);
+
+ body = _slang_gen_operation(A, &oper->children[1]);
+ if (body)
+ tree = new_seq(tree, body);
+
+ endLoop = new_end_loop(beginLoop);
+ tree = new_seq(tree, endLoop);
+
+ return tree;
+}
+
+
+/**
* Generate IR tree for a do-while-loop.
*/
static slang_ir_node *
@@ -1517,7 +1585,7 @@ _slang_gen_if(slang_assemble_ctx * A, const slang_operation *oper)
* IF/ELSE/ENDIF instructions
*/
static slang_ir_node *
-_slang_gen_if2(slang_assemble_ctx * A, const slang_operation *oper)
+_slang_gen_hl_if(slang_assemble_ctx * A, const slang_operation *oper)
{
/*
* eval expr (child[0]), updating condcodes
@@ -1529,6 +1597,10 @@ _slang_gen_if2(slang_assemble_ctx * A, const slang_operation *oper)
* "false" code block
* label "__endif"
*/
+ /* XXX special cases to check for:
+ * if body of conditiona is just a "break", emit a conditional break
+ * instruction.
+ */
const GLboolean haveElseClause = !_slang_is_noop(&oper->children[2]);
slang_ir_node *ifNode, *cond, *trueBody, *elseNode, *falseBody, *endifNode;
slang_ir_node *tree;
@@ -2261,7 +2333,10 @@ _slang_gen_operation(slang_assemble_ctx * A, slang_operation *oper)
return _slang_gen_operation(A, &oper->children[0]);
break;
case slang_oper_while:
- return _slang_gen_while(A, oper);
+ if (UseHighLevelInstructions)
+ return _slang_gen_hl_while(A, oper);
+ else
+ return _slang_gen_while(A, oper);
case slang_oper_do:
return _slang_gen_do(A, oper);
case slang_oper_for:
@@ -2427,8 +2502,9 @@ _slang_gen_operation(slang_assemble_ctx * A, slang_operation *oper)
case slang_oper_identifier:
return _slang_gen_variable(A, oper);
case slang_oper_if:
- if (A->program->Target == GL_FRAGMENT_PROGRAM_ARB) {
- return _slang_gen_if(A, oper);
+ if (A->program->Target == GL_FRAGMENT_PROGRAM_ARB
+ && UseHighLevelInstructions) {
+ return _slang_gen_hl_if(A, oper);
}
else {
/* XXX update tnl executor */
diff --git a/src/mesa/shader/slang/slang_emit.c b/src/mesa/shader/slang/slang_emit.c
index 756bbe95879..311eea1e6ad 100644
--- a/src/mesa/shader/slang/slang_emit.c
+++ b/src/mesa/shader/slang/slang_emit.c
@@ -1006,6 +1006,42 @@ emit_cond(slang_var_table *vt, slang_ir_node *n, struct gl_program *prog)
/**
+ * Logical-NOT
+ */
+static struct prog_instruction *
+emit_not(slang_var_table *vt, slang_ir_node *n, struct gl_program *prog)
+{
+ GLfloat zero = 0.0;
+ slang_ir_storage st;
+ struct prog_instruction *inst;
+
+ /* need zero constant */
+ st.File = PROGRAM_CONSTANT;
+ st.Size = 1;
+ st.Index = _mesa_add_unnamed_constant(prog->Parameters, &zero,
+ 1, &st.Swizzle);
+
+ /* child expr */
+ (void) emit(vt, n->Children[0], prog);
+ /* XXXX if child instr is SGT convert to SLE, if SEQ, SNE, etc */
+
+ if (!n->Store)
+ if (!alloc_temp_storage(vt, n, n->Children[0]->Store->Size))
+ return NULL;
+
+ inst = new_instruction(prog, OPCODE_SEQ);
+ storage_to_dst_reg(&inst->DstReg, n->Store, n->Writemask);
+ storage_to_src_reg(&inst->SrcReg[0], n->Children[0]->Store);
+ storage_to_src_reg(&inst->SrcReg[1], &st);
+
+ free_temp_storage(vt, n->Children[0]);
+
+ return inst;
+}
+
+
+
+/**
* Remove any SWIZZLE_NIL terms from given swizzle mask (smear prev term).
* Ex: fix_swizzle("zyNN") -> "zyyy"
*/
@@ -1202,6 +1238,9 @@ emit(slang_var_table *vt, slang_ir_node *n, struct gl_program *prog)
case IR_COND:
return emit_cond(vt, n, prog);
+ case IR_NOT:
+ return emit_not(vt, n, prog);
+
case IR_LABEL:
return emit_label(n->Target, prog);
case IR_JUMP:
@@ -1235,6 +1274,39 @@ emit(slang_var_table *vt, slang_ir_node *n, struct gl_program *prog)
return inst;
}
+ case IR_BEGIN_LOOP:
+ {
+ /* save location of this instruction, used by OPCODE_ENDLOOP */
+ n->InstLocation = prog->NumInstructions;
+ (void) new_instruction(prog, OPCODE_BGNLOOP);
+ }
+ break;
+ case IR_END_LOOP:
+ {
+ struct prog_instruction *inst;
+ inst = new_instruction(prog, OPCODE_ENDLOOP);
+ assert(n->BranchNode);
+ assert(n->BranchNode->InstLocation >= 0);
+ /* The instruction BranchTarget points to top of loop */
+ inst->BranchTarget = n->BranchNode->InstLocation;
+ return inst;
+ }
+ case IR_CONT:
+ return new_instruction(prog, OPCODE_CONT);
+ case IR_BREAK:
+ {
+ struct prog_instruction *inst;
+ inst = new_instruction(prog, OPCODE_BRK);
+ inst->DstReg.CondMask = COND_TR; /* always true */
+ return inst;
+ }
+ case IR_BEGIN_SUB:
+ return new_instruction(prog, OPCODE_BGNSUB);
+ case IR_END_SUB:
+ return new_instruction(prog, OPCODE_ENDSUB);
+ case IR_RETURN:
+ return new_instruction(prog, OPCODE_RET);
+
default:
_mesa_problem(NULL, "Unexpected IR opcode in emit()\n");
abort();
diff --git a/src/mesa/shader/slang/slang_ir.h b/src/mesa/shader/slang/slang_ir.h
index ac1ea4dbb4a..df5fc067790 100644
--- a/src/mesa/shader/slang/slang_ir.h
+++ b/src/mesa/shader/slang/slang_ir.h
@@ -150,6 +150,8 @@ typedef struct slang_ir_node_
GLfloat Value[4]; /**< If Opcode == IR_FLOAT */
slang_variable *Var; /**< If Opcode == IR_VAR or IR_VAR_DECL */
slang_ir_storage *Store; /**< location of result of this operation */
+ GLint InstLocation; /**< Location of instruction emitted for this node */
+ struct slang_ir_node_ *BranchNode; /**< Used for branch instructions */
} slang_ir_node;
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-14 11:57:26 +0000