From: Junyan He <junyan...@linux.intel.com>
Signed-off-by: Junyan He <junyan...@linux.intel.com>
---
backend/src/backend/gen/gen_mesa_disasm.c | 83 +++++++++++++++++++++++++++++--
1 file changed, 78 insertions(+), 5 deletions(-)
diff --git a/backend/src/backend/gen/gen_mesa_disasm.c
b/backend/src/backend/gen/gen_mesa_disasm.c
index adf4e58..5220233 100644
--- a/backend/src/backend/gen/gen_mesa_disasm.c
+++ b/backend/src/backend/gen/gen_mesa_disasm.c
@@ -257,7 +257,7 @@ static const char *access_mode[2] = {
[1] = "align16",
};
-static const char *reg_encoding[10] = {
+static const char *reg_encoding[11] = {
[0] = ":UD",
[1] = ":D",
[2] = ":UW",
@@ -267,10 +267,11 @@ static const char *reg_encoding[10] = {
[6] = ":DF",
[7] = ":F",
[8] = ":UQ",
- [9] = ":Q"
+ [9] = ":Q",
+ [10] = ":HF"
};
-int reg_type_size[10] = {
+int reg_type_size[11] = {
[0] = 4,
[1] = 4,
[2] = 2,
@@ -280,7 +281,8 @@ int reg_type_size[10] = {
[6] = 8,
[7] = 4,
[8] = 8,
- [9] = 8
+ [9] = 8,
+ [10] = 2,
};
static const char *reg_file[4] = {
@@ -463,6 +465,17 @@ static int gen_version;
bits; \
})
+#define GEN_BITS_FIELD_WITH_TYPE(inst, gen, TYPE) \
+ ({ \
+ TYPE bits; \
+ if (gen_version < 80) \
+ bits = ((const union Gen7NativeInstruction *)inst)->gen; \
+ else \
+ bits = ((const union Gen8NativeInstruction *)inst)->gen; \
+ bits; \
+ })
+
+
#define GEN_BITS_FIELD2(inst, gen7, gen8) \
({ \
int bits; \
@@ -954,6 +967,57 @@ static int src2_3src(FILE *file, const void* inst)
return err;
}
+static uint32_t __conv_half_to_float(uint16_t h)
+{
+ struct __FP32 {
+ uint32_t mantissa:23;
+ uint32_t exponent:8;
+ uint32_t sign:1;
+ };
+ struct __FP16 {
+ uint32_t mantissa:10;
+ uint32_t exponent:5;
+ uint32_t sign:1;
+ };
+ uint32_t f;
+ struct __FP32 o;
+ memset(&o, 0, sizeof(o));
+ struct __FP16 i;
+ memcpy(&i, &h, sizeof(uint16_t));
+
+ if (i.exponent == 0 && i.mantissa == 0) // (Signed) zero
+ o.sign = i.sign;
+ else {
+ if (i.exponent == 0) { // Denormal (converts to normalized)
+ // Adjust mantissa so it's normalized (and keep
+ // track of exponent adjustment)
+ int e = -1;
+ uint m = i.mantissa;
+ do {
+ e++;
+ m <<= 1;
+ } while ((m & 0x400) == 0);
+
+ o.mantissa = (m & 0x3ff) << 13;
+ o.exponent = 127 - 15 - e;
+ o.sign = i.sign;
+ } else if (i.exponent == 0x1f) { // Inf/NaN
+ // NOTE: Both can be handled with same code path
+ // since we just pass through mantissa bits.
+ o.mantissa = i.mantissa << 13;
+ o.exponent = 255;
+ o.sign = i.sign;
+ } else { // Normalized number
+ o.mantissa = i.mantissa << 13;
+ o.exponent = 127 - 15 + i.exponent;
+ o.sign = i.sign;
+ }
+ }
+
+ memcpy(&f, &o, sizeof(uint32_t));
+ return f;
+}
+
static int imm(FILE *file, uint32_t type, const void* inst)
{
switch (type) {
@@ -979,7 +1043,7 @@ static int imm(FILE *file, uint32_t type, const void* inst)
format(file, "0x%xV", GEN_BITS_FIELD(inst, bits3.ud));
break;
case GEN_TYPE_F:
- format(file, "%-gF", GEN_BITS_FIELD(inst, bits3.f));
+ format(file, "%-gF", GEN_BITS_FIELD_WITH_TYPE(inst, bits3.f, float));
break;
case GEN_TYPE_UL:
assert(!(gen_version < 80));
@@ -993,6 +1057,15 @@ static int imm(FILE *file, uint32_t type, const void*
inst)
val = (val << 32) + ((((const union Gen8NativeInstruction
*)inst)->bits2).ud);
format(file, "0x%lldQ", val);
}
+ case GEN_TYPE_HF_IMM:
+ {
+ uint16_t h = GEN_BITS_FIELD_WITH_TYPE(inst, bits3.d, uint16_t);
+ uint32_t uf = __conv_half_to_float(h);
+ float f;
+ memcpy(&f, &uf, sizeof(float));
+ format(file, "%-gHF", f);
+ break;
+ }
}
return 0;
}
--
1.9.1
_______________________________________________
Beignet mailing list
Beignet@lists.freedesktop.org
http://lists.freedesktop.org/mailman/listinfo/beignet
