diff options
Diffstat (limited to 'src/mesa/swrast')
| -rw-r--r-- | src/mesa/swrast/s_fragprog.c | 38 |
1 files changed, 32 insertions, 6 deletions
diff --git a/src/mesa/swrast/s_fragprog.c b/src/mesa/swrast/s_fragprog.c index 00231aeae8b..287dd9b1dbe 100644 --- a/src/mesa/swrast/s_fragprog.c +++ b/src/mesa/swrast/s_fragprog.c @@ -625,7 +625,7 @@ execute_program( GLcontext *ctx, GLuint column ) { const GLuint MAX_EXEC = 10000; - GLuint pc, total = 0; + GLint pc, total = 0, loopDepth = 0; if (DEBUG_FRAG) { printf("execute fragment program --------------------\n"); @@ -642,7 +642,7 @@ execute_program( GLcontext *ctx, } if (DEBUG_FRAG) { - _mesa_print_instruction(inst); + _mesa_print_instruction(inst, 0); } switch (inst->Opcode) { @@ -676,8 +676,13 @@ execute_program( GLcontext *ctx, } break; case OPCODE_BGNLOOP: /* begin loop */ + loopDepth++; break; case OPCODE_ENDLOOP: /* end loop */ + loopDepth--; + assert(loopDepth >= 0); + /* subtract 1 here since pc is incremented by for(pc) loop */ + pc = inst->BranchTarget - 1; /* go to matching BNGLOOP */ break; case OPCODE_BGNSUB: /* begin subroutine */ break; @@ -701,7 +706,19 @@ execute_program( GLcontext *ctx, } break; case OPCODE_BRK: /* break out of loop */ - /* assert inside loop */ + if (loopDepth == 0) { + _mesa_problem(ctx, "BRK not inside a loop"); + } + /* search for OPCODE_ENDLOOP */ + do { + pc++; + inst = program->Base.Instructions + pc; + if (inst->Opcode == OPCODE_ENDLOOP) { + loopDepth--; + assert(loopDepth >= 0); + break; + } + } while (pc < maxInst); break; case OPCODE_CAL: /* Call subroutine */ { @@ -880,20 +897,25 @@ execute_program( GLcontext *ctx, /* do if-clause (just continue execution) */ } else { - /* do else-clause, or go to endif */ + /* search for else-clause or endif */ + /* XXX could encode location of the else/endif statement + * in the IF instruction to avoid searching... + */ GLint ifDepth = 1; do { pc++; inst = program->Base.Instructions + pc; if (inst->Opcode == OPCODE_END) { /* mal-formed program! */ - abort(); + _mesa_problem(ctx, "END found before ELSE/ENDIF"); + return GL_FALSE; } else if (inst->Opcode == OPCODE_IF) { + /* nested if */ ifDepth++; } else if (inst->Opcode == OPCODE_ELSE) { - if (ifDepth == 0) { + if (ifDepth == 1) { /* ok, continue normal execution */ break; } @@ -1335,6 +1357,10 @@ execute_program( GLcontext *ctx, result[2] = (a[2] > b[2]) ? 1.0F : 0.0F; result[3] = (a[3] > b[3]) ? 1.0F : 0.0F; store_vector4( inst, machine, result ); + if (DEBUG_FRAG) { + printf("SGT %g %g %g %g\n", + result[0], result[1], result[2], result[3]); + } } break; case OPCODE_SIN: |