diff options
| author | Brian <[email protected]> | 2007-01-20 09:27:40 -0700 |
|---|---|---|
| committer | Brian <[email protected]> | 2007-01-20 09:27:40 -0700 |
| commit | 5ae49cf3ed53fda6a904d7e90feef78495ae6903 (patch) | |
| tree | 9314ccc16363edd6a4863788d864a60927dda6da /src/mesa/swrast | |
| parent | a3e938b8da07e656775e88bb4b078429723689a2 (diff) | |
Initial implementation of OPCODE_IF/ELSE/ENDIF instructions.
Diffstat (limited to 'src/mesa/swrast')
| -rw-r--r-- | src/mesa/swrast/s_fragprog.c | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/src/mesa/swrast/s_fragprog.c b/src/mesa/swrast/s_fragprog.c index b842b49616c..813345f4cd1 100644 --- a/src/mesa/swrast/s_fragprog.c +++ b/src/mesa/swrast/s_fragprog.c @@ -888,6 +888,73 @@ execute_program( GLcontext *ctx, store_vector4( inst, machine, result ); } 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 { + /* do else-clause, or go to endif */ + GLint ifDepth = 1; + do { + pc++; + inst = program->Base.Instructions + pc; + if (inst->Opcode == OPCODE_END) { + /* mal-formed program! */ + abort(); + } + else if (inst->Opcode == OPCODE_IF) { + ifDepth++; + } + else if (inst->Opcode == OPCODE_ELSE) { + if (ifDepth == 0) { + /* ok, continue normal execution */ + break; + } + } + else if (inst->Opcode == OPCODE_ENDIF) { + ifDepth--; + if (ifDepth == 0) { + /* ok, continue normal execution */ + break; + } + } + assert(ifDepth >= 0); + } while (pc < maxInst); + } + } + break; + case OPCODE_ELSE: + { + /* find/goto ENDIF */ + GLint ifDepth = 1; + do { + pc++; + inst = program->Base.Instructions + pc; + if (inst->Opcode == OPCODE_END) { + /* mal-formed program! */ + abort(); + } + else if (inst->Opcode == OPCODE_IF) { + ifDepth++; + } + else if (inst->Opcode == OPCODE_ENDIF) { + ifDepth--; + if (ifDepth == 0) + break; + } + assert(ifDepth >= 0); + } while (pc < maxInst); + } + break; + case OPCODE_ENDIF: + /* nothing */ + break; case OPCODE_INT: /* float to int */ { GLfloat a[4], result[4]; |