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Simplify code with eval_condition(). Implement conditional BRK.

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This commit is contained in:
Brian
2007-02-08 13:22:31 -07:00
parent 2c75ef62ea
commit 97125fb370
1 changed files with 56 additions and 69 deletions
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125
src/mesa/swrast/s_fragprog.c
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@@ -417,6 +417,29 @@ test_cc(GLuint condCode, GLuint ccMaskRule)
}
/**
* Evaluate the 4 condition codes against a predicate and return GL_TRUE
* or GL_FALSE to indicate result.
*/
static INLINE GLboolean
eval_condition(const struct fp_machine *machine,
const struct prog_instruction *inst)
{
const GLuint swizzle = inst->DstReg.CondSwizzle;
const GLuint condMask = inst->DstReg.CondMask;
if (test_cc(machine->CondCodes[GET_SWZ(swizzle, 0)], condMask) ||
test_cc(machine->CondCodes[GET_SWZ(swizzle, 1)], condMask) ||
test_cc(machine->CondCodes[GET_SWZ(swizzle, 2)], condMask) ||
test_cc(machine->CondCodes[GET_SWZ(swizzle, 3)], condMask)) {
return GL_TRUE;
}
else {
return GL_FALSE;
}
}
/**
* Store 4 floats into a register. Observe the instructions saturate and
* set-condition-code flags.
@@ -687,40 +710,28 @@ execute_program( GLcontext *ctx,
case OPCODE_ENDSUB: /* end subroutine */
break;
case OPCODE_BRA: /* conditional branch */
{
/* NOTE: The branch is conditional! */
const GLuint swizzle = inst->DstReg.CondSwizzle;
const GLuint condMask = inst->DstReg.CondMask;
if (test_cc(machine->CondCodes[GET_SWZ(swizzle, 0)], condMask) ||
test_cc(machine->CondCodes[GET_SWZ(swizzle, 1)], condMask) ||
test_cc(machine->CondCodes[GET_SWZ(swizzle, 2)], condMask) ||
test_cc(machine->CondCodes[GET_SWZ(swizzle, 3)], condMask)) {
/* take branch */
pc = inst->BranchTarget - 1;
}
if (eval_condition(machine, inst)) {
/* take branch */
pc = inst->BranchTarget - 1;
}
break;
case OPCODE_BRK: /* break out of loop */
case OPCODE_BRK: /* break out of loop (conditional) */
/* fall-through */
case OPCODE_CONT: /* continue loop */
case OPCODE_CONT: /* continue loop (conditional) */
/* Subtract 1 here since we'll do pc++ at end of for-loop */
pc = inst->BranchTarget - 1;
if (eval_condition(machine, inst)) {
/* take branch */
pc = inst->BranchTarget - 1;
}
break;
case OPCODE_CAL: /* Call subroutine */
{
/* NOTE: The call is conditional! */
const GLuint swizzle = inst->DstReg.CondSwizzle;
const GLuint condMask = inst->DstReg.CondMask;
if (test_cc(machine->CondCodes[GET_SWZ(swizzle, 0)], condMask) ||
test_cc(machine->CondCodes[GET_SWZ(swizzle, 1)], condMask) ||
test_cc(machine->CondCodes[GET_SWZ(swizzle, 2)], condMask) ||
test_cc(machine->CondCodes[GET_SWZ(swizzle, 3)], condMask)) {
if (machine->StackDepth >= MAX_PROGRAM_CALL_DEPTH) {
return GL_TRUE; /* Per GL_NV_vertex_program2 spec */
}
machine->CallStack[machine->StackDepth++] = pc + 1;
pc = inst->BranchTarget; /* XXX - 1 ??? */
case OPCODE_CAL: /* Call subroutine (conditional) */
if (eval_condition(machine, inst)) {
/* call the subroutine */
if (machine->StackDepth >= MAX_PROGRAM_CALL_DEPTH) {
return GL_TRUE; /* Per GL_NV_vertex_program2 spec */
}
machine->CallStack[machine->StackDepth++] = pc + 1;
pc = inst->BranchTarget; /* XXX - 1 ??? */
}
break;
case OPCODE_CMP:
@@ -871,29 +882,20 @@ execute_program( GLcontext *ctx,
}
break;
case OPCODE_IF:
{
const GLuint swizzle = inst->DstReg.CondSwizzle;
const GLuint condMask = inst->DstReg.CondMask;
if (test_cc(machine->CondCodes[GET_SWZ(swizzle, 0)], condMask) ||
test_cc(machine->CondCodes[GET_SWZ(swizzle, 1)], condMask) ||
test_cc(machine->CondCodes[GET_SWZ(swizzle, 2)], condMask) ||
test_cc(machine->CondCodes[GET_SWZ(swizzle, 3)], condMask)) {
/* do if-clause (just continue execution) */
}
else {
/* go to the instruction after ELSE or ENDIF */
assert(inst->BranchTarget >= 0);
pc = inst->BranchTarget - 1;
}
if (eval_condition(machine, inst)) {
/* do if-clause (just continue execution) */
}
break;
case OPCODE_ELSE:
{
/* goto ENDIF */
else {
/* go to the instruction after ELSE or ENDIF */
assert(inst->BranchTarget >= 0);
pc = inst->BranchTarget - 1;
}
break;
case OPCODE_ELSE:
/* goto ENDIF */
assert(inst->BranchTarget >= 0);
pc = inst->BranchTarget - 1;
break;
case OPCODE_ENDIF:
/* nothing */
break;
@@ -908,16 +910,9 @@ execute_program( GLcontext *ctx,
store_vector4( inst, machine, result );
}
break;
case OPCODE_KIL_NV: /* NV_f_p only */
{
const GLuint swizzle = inst->DstReg.CondSwizzle;
const GLuint condMask = inst->DstReg.CondMask;
if (test_cc(machine->CondCodes[GET_SWZ(swizzle, 0)], condMask) ||
test_cc(machine->CondCodes[GET_SWZ(swizzle, 1)], condMask) ||
test_cc(machine->CondCodes[GET_SWZ(swizzle, 2)], condMask) ||
test_cc(machine->CondCodes[GET_SWZ(swizzle, 3)], condMask)) {
return GL_FALSE;
}
case OPCODE_KIL_NV: /* NV_f_p only (conditional) */
if (eval_condition(machine, inst)) {
return GL_FALSE;
}
break;
case OPCODE_KIL: /* ARB_f_p only */
@@ -1203,20 +1198,12 @@ execute_program( GLcontext *ctx,
store_vector4( inst, machine, result );
}
break;
case OPCODE_RET: /* return from subroutine */
{
/* NOTE: The return is conditional! */
const GLuint swizzle = inst->DstReg.CondSwizzle;
const GLuint condMask = inst->DstReg.CondMask;
if (test_cc(machine->CondCodes[GET_SWZ(swizzle, 0)], condMask) ||
test_cc(machine->CondCodes[GET_SWZ(swizzle, 1)], condMask) ||
test_cc(machine->CondCodes[GET_SWZ(swizzle, 2)], condMask) ||
test_cc(machine->CondCodes[GET_SWZ(swizzle, 3)], condMask)) {
if (machine->StackDepth == 0) {
return GL_TRUE; /* Per GL_NV_vertex_program2 spec */
}
pc = machine->CallStack[--machine->StackDepth];
case OPCODE_RET: /* return from subroutine (conditional) */
if (eval_condition(machine, inst)) {
if (machine->StackDepth == 0) {
return GL_TRUE; /* Per GL_NV_vertex_program2 spec */
}
pc = machine->CallStack[--machine->StackDepth];
}
break;
case OPCODE_RFL: /* reflection vector */