[Mesa-dev] [PATCH 4/4] softpipe: add tgsi_exec support for new bit manipulation opcodes
Ilia Mirkin
imirkin at alum.mit.edu
Fri Apr 25 10:41:42 PDT 2014
Signed-off-by: Ilia Mirkin <imirkin at alum.mit.edu>
---
src/gallium/auxiliary/tgsi/tgsi_exec.c | 188 +++++++++++++++++++++++++++++++++
src/gallium/auxiliary/util/u_math.h | 11 ++
2 files changed, 199 insertions(+)
diff --git a/src/gallium/auxiliary/tgsi/tgsi_exec.c b/src/gallium/auxiliary/tgsi/tgsi_exec.c
index 55da60a..2cc7884 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_exec.c
+++ b/src/gallium/auxiliary/tgsi/tgsi_exec.c
@@ -2603,6 +2603,40 @@ exec_vector_trinary(struct tgsi_exec_machine *mach,
}
}
+typedef void (* micro_quaternary_op)(union tgsi_exec_channel *dst,
+ const union tgsi_exec_channel *src0,
+ const union tgsi_exec_channel *src1,
+ const union tgsi_exec_channel *src2,
+ const union tgsi_exec_channel *src3);
+
+static void
+exec_vector_quaternary(struct tgsi_exec_machine *mach,
+ const struct tgsi_full_instruction *inst,
+ micro_quaternary_op op,
+ enum tgsi_exec_datatype dst_datatype,
+ enum tgsi_exec_datatype src_datatype)
+{
+ unsigned int chan;
+ struct tgsi_exec_vector dst;
+
+ for (chan = 0; chan < TGSI_NUM_CHANNELS; chan++) {
+ if (inst->Dst[0].Register.WriteMask & (1 << chan)) {
+ union tgsi_exec_channel src[4];
+
+ fetch_source(mach, &src[0], &inst->Src[0], chan, src_datatype);
+ fetch_source(mach, &src[1], &inst->Src[1], chan, src_datatype);
+ fetch_source(mach, &src[2], &inst->Src[2], chan, src_datatype);
+ fetch_source(mach, &src[3], &inst->Src[3], chan, src_datatype);
+ op(&dst.xyzw[chan], &src[0], &src[1], &src[2], &src[3]);
+ }
+ }
+ for (chan = 0; chan < TGSI_NUM_CHANNELS; chan++) {
+ if (inst->Dst[0].Register.WriteMask & (1 << chan)) {
+ store_dest(mach, &dst.xyzw[chan], &inst->Dst[0], inst, chan, dst_datatype);
+ }
+ }
+}
+
static void
exec_dp3(struct tgsi_exec_machine *mach,
const struct tgsi_full_instruction *inst)
@@ -3571,6 +3605,135 @@ micro_ucmp(union tgsi_exec_channel *dst,
}
static void
+micro_ibfe(union tgsi_exec_channel *dst,
+ const union tgsi_exec_channel *src0,
+ const union tgsi_exec_channel *src1,
+ const union tgsi_exec_channel *src2)
+{
+ int i;
+ for (i = 0; i < 4; i++) {
+ int width = src2->i[i] & 0x1f;
+ int offset = src1->i[i] & 0x1f;
+ if (width == 0)
+ dst->i[i] = 0;
+ else if (width + offset < 32)
+ dst->i[i] = (src0->i[i] << (32 - width - offset)) >> (32 - width);
+ else
+ dst->i[i] = src0->i[i] >> offset;
+ }
+}
+
+static void
+micro_ubfe(union tgsi_exec_channel *dst,
+ const union tgsi_exec_channel *src0,
+ const union tgsi_exec_channel *src1,
+ const union tgsi_exec_channel *src2)
+{
+ int i;
+ for (i = 0; i < 4; i++) {
+ int width = src2->u[i] & 0x1f;
+ int offset = src1->u[i] & 0x1f;
+ if (width == 0)
+ dst->u[i] = 0;
+ else if (width + offset < 32)
+ dst->u[i] = (src0->u[i] << (32 - width - offset)) >> (32 - width);
+ else
+ dst->u[i] = src0->u[i] >> offset;
+ }
+}
+
+static void
+micro_bfi(union tgsi_exec_channel *dst,
+ const union tgsi_exec_channel *src0,
+ const union tgsi_exec_channel *src1,
+ const union tgsi_exec_channel *src2,
+ const union tgsi_exec_channel *src3)
+{
+ int i;
+ for (i = 0; i < 4; i++) {
+ int width = src3->u[i] & 0x1f;
+ int offset = src2->u[i] & 0x1f;
+ int bitmask = ((1 << width) - 1) << offset;
+ dst->u[i] = ((src1->u[i] << offset) & bitmask) | (src0->u[i] & ~bitmask);
+ }
+}
+
+static void
+micro_brev(union tgsi_exec_channel *dst,
+ const union tgsi_exec_channel *src)
+{
+ int i;
+ static const unsigned reverse[16] = {
+ [0x0] = 0x0,
+ [0x1] = 0x8,
+ [0x2] = 0x4,
+ [0x3] = 0xc,
+ [0x4] = 0x2,
+ [0x5] = 0xa,
+ [0x6] = 0x6,
+ [0x7] = 0xe,
+ [0x8] = 0x1,
+ [0x9] = 0x9,
+ [0xa] = 0x5,
+ [0xb] = 0xd,
+ [0xc] = 0x3,
+ [0xd] = 0xb,
+ [0xe] = 0x7,
+ [0xf] = 0xf,
+ };
+ for (i = 0; i < 4; i++) {
+ dst->u[i] = (reverse[(src->u[i] >> 0) & 0xf] << 28 |
+ reverse[(src->u[i] >> 4) & 0xf] << 24 |
+ reverse[(src->u[i] >> 8) & 0xf] << 20 |
+ reverse[(src->u[i] >> 12) & 0xf] << 16 |
+ reverse[(src->u[i] >> 16) & 0xf] << 12 |
+ reverse[(src->u[i] >> 20) & 0xf] << 8 |
+ reverse[(src->u[i] >> 24) & 0xf] << 4 |
+ reverse[(src->u[i] >> 28) & 0xf] << 0);
+ }
+}
+
+static void
+micro_popc(union tgsi_exec_channel *dst,
+ const union tgsi_exec_channel *src)
+{
+ dst->u[0] = util_bitcount(src->u[0]);
+ dst->u[1] = util_bitcount(src->u[1]);
+ dst->u[2] = util_bitcount(src->u[2]);
+ dst->u[3] = util_bitcount(src->u[3]);
+}
+
+static void
+micro_lsb(union tgsi_exec_channel *dst,
+ const union tgsi_exec_channel *src)
+{
+ dst->i[0] = ffs(src->u[0]) - 1;
+ dst->i[1] = ffs(src->u[1]) - 1;
+ dst->i[2] = ffs(src->u[2]) - 1;
+ dst->i[3] = ffs(src->u[3]) - 1;
+}
+
+static void
+micro_imsb(union tgsi_exec_channel *dst,
+ const union tgsi_exec_channel *src)
+{
+ dst->i[0] = util_last_bit_signed(src->i[0]) - 1;
+ dst->i[1] = util_last_bit_signed(src->i[1]) - 1;
+ dst->i[2] = util_last_bit_signed(src->i[2]) - 1;
+ dst->i[3] = util_last_bit_signed(src->i[3]) - 1;
+}
+
+static void
+micro_umsb(union tgsi_exec_channel *dst,
+ const union tgsi_exec_channel *src)
+{
+ dst->i[0] = util_last_bit(src->u[0]) - 1;
+ dst->i[1] = util_last_bit(src->u[1]) - 1;
+ dst->i[2] = util_last_bit(src->u[2]) - 1;
+ dst->i[3] = util_last_bit(src->u[3]) - 1;
+}
+
+static void
exec_instruction(
struct tgsi_exec_machine *mach,
const struct tgsi_full_instruction *inst,
@@ -4417,6 +4580,31 @@ exec_instruction(
/* src[2] = sampler unit */
exec_tex(mach, inst, TEX_MODIFIER_EXPLICIT_LOD, 2);
break;
+
+ case TGSI_OPCODE_IBFE:
+ exec_vector_trinary(mach, inst, micro_ibfe, TGSI_EXEC_DATA_INT, TGSI_EXEC_DATA_INT);
+ break;
+ case TGSI_OPCODE_UBFE:
+ exec_vector_trinary(mach, inst, micro_ubfe, TGSI_EXEC_DATA_UINT, TGSI_EXEC_DATA_UINT);
+ break;
+ case TGSI_OPCODE_BFI:
+ exec_vector_quaternary(mach, inst, micro_bfi, TGSI_EXEC_DATA_UINT, TGSI_EXEC_DATA_UINT);
+ break;
+ case TGSI_OPCODE_BREV:
+ exec_vector_unary(mach, inst, micro_brev, TGSI_EXEC_DATA_UINT, TGSI_EXEC_DATA_UINT);
+ break;
+ case TGSI_OPCODE_POPC:
+ exec_vector_unary(mach, inst, micro_popc, TGSI_EXEC_DATA_UINT, TGSI_EXEC_DATA_UINT);
+ break;
+ case TGSI_OPCODE_LSB:
+ exec_vector_unary(mach, inst, micro_lsb, TGSI_EXEC_DATA_INT, TGSI_EXEC_DATA_UINT);
+ break;
+ case TGSI_OPCODE_IMSB:
+ exec_vector_unary(mach, inst, micro_imsb, TGSI_EXEC_DATA_INT, TGSI_EXEC_DATA_INT);
+ break;
+ case TGSI_OPCODE_UMSB:
+ exec_vector_unary(mach, inst, micro_umsb, TGSI_EXEC_DATA_INT, TGSI_EXEC_DATA_UINT);
+ break;
default:
assert( 0 );
}
diff --git a/src/gallium/auxiliary/util/u_math.h b/src/gallium/auxiliary/util/u_math.h
index ec03e4e..5b811e3 100644
--- a/src/gallium/auxiliary/util/u_math.h
+++ b/src/gallium/auxiliary/util/u_math.h
@@ -567,6 +567,17 @@ static INLINE unsigned util_last_bit(unsigned u)
#endif
}
+static INLINE unsigned util_last_bit_signed(int i)
+{
+#if defined(__GNUC__) && ((__GNUC__ * 100 + __GNUC_MINOR__) >= 407)
+ return 31 - __builtin_clrsb(i);
+#else
+ if (i >= 0)
+ return util_last_bit(i);
+ else
+ return util_last_bit(~(unsigned)i);
+#endif
+}
/* Destructively loop over all of the bits in a mask as in:
*
--
1.8.3.2
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