#include "i915_reg.h"
#include "i915_context.h"
#include "i915_fpc.h"
+#include "util/u_math.h"
#define A0_DEST( reg ) (((reg)&UREG_TYPE_NR_MASK)>>UREG_A0_DEST_SHIFT_LEFT)
}
p->temp_flag |= 1 << (bit - 1);
- return UREG(REG_TYPE_R, (bit - 1));
+ return bit - 1;
}
+static void
+i915_release_temp(struct i915_fp_compile *p, int reg)
+{
+ p->temp_flag &= ~(1 << reg);
+}
+
+
+/**
+ * Get unpreserved temporary, a temp whose value is not preserved between
+ * PS program phases.
+ */
uint
i915_get_utemp(struct i915_fp_compile * p)
{
return dest;
}
+
+/**
+ * Emit a texture load or texkill instruction.
+ * \param dest the dest i915 register
+ * \param destmask the dest register writemask
+ * \param sampler the i915 sampler register
+ * \param coord the i915 source texcoord operand
+ * \param opcode the instruction opcode
+ */
uint i915_emit_texld( struct i915_fp_compile *p,
uint dest,
uint destmask,
uint sampler,
uint coord,
- uint op )
+ uint opcode )
{
- uint k = UREG(GET_UREG_TYPE(coord), GET_UREG_NR(coord));
+ const uint k = UREG(GET_UREG_TYPE(coord), GET_UREG_NR(coord));
+ int temp = -1;
+
if (coord != k) {
- /* No real way to work around this in the general case - need to
- * allocate and declare a new temporary register (a utemp won't
- * do). Will fallback for now.
+ /* texcoord is swizzled or negated. Need to allocate a new temporary
+ * register (a utemp / unpreserved temp) won't do.
*/
- i915_program_error(p, "Can't (yet) swizzle TEX arguments");
- assert(0);
- return 0;
+ uint tempReg;
+
+ temp = i915_get_temp(p); /* get temp reg index */
+ tempReg = UREG(REG_TYPE_R, temp); /* make i915 register */
+
+ i915_emit_arith( p, A0_MOV,
+ tempReg, A0_DEST_CHANNEL_ALL, /* dest reg, writemask */
+ 0, /* saturate */
+ coord, 0, 0 ); /* src0, src1, src2 */
+
+ /* new src texcoord is tempReg */
+ coord = tempReg;
}
/* Don't worry about saturate as we only support
*/
if (destmask != A0_DEST_CHANNEL_ALL) {
+ /* if not writing to XYZW... */
uint tmp = i915_get_utemp(p);
- i915_emit_texld( p, tmp, A0_DEST_CHANNEL_ALL, sampler, coord, op );
+ i915_emit_texld( p, tmp, A0_DEST_CHANNEL_ALL, sampler, coord, opcode );
i915_emit_arith( p, A0_MOV, dest, destmask, 0, tmp, 0, 0 );
- return dest;
+ /* XXX release utemp here? */
}
else {
assert(GET_UREG_TYPE(dest) != REG_TYPE_CONST);
assert(dest = UREG(GET_UREG_TYPE(dest), GET_UREG_NR(dest)));
+ /* is the sampler coord a texcoord input reg? */
if (GET_UREG_TYPE(coord) != REG_TYPE_T) {
p->nr_tex_indirect++;
}
- *(p->csr++) = (op |
+ *(p->csr++) = (opcode |
T0_DEST( dest ) |
T0_SAMPLER( sampler ));
*(p->csr++) = T2_MBZ;
p->nr_tex_insn++;
- return dest;
}
+
+ if (temp >= 0)
+ i915_release_temp(p, temp);
+
+ return dest;
}