aboutsummaryrefslogtreecommitdiff
path: root/mesalib/src/gallium
diff options
context:
space:
mode:
Diffstat (limited to 'mesalib/src/gallium')
-rw-r--r--mesalib/src/gallium/auxiliary/util/u_format_r11g11b10f.h66
-rw-r--r--mesalib/src/gallium/auxiliary/util/u_format_table.py2
-rw-r--r--mesalib/src/gallium/auxiliary/util/u_math.h13
3 files changed, 64 insertions, 17 deletions
diff --git a/mesalib/src/gallium/auxiliary/util/u_format_r11g11b10f.h b/mesalib/src/gallium/auxiliary/util/u_format_r11g11b10f.h
index 8e0572aa7..6bb430296 100644
--- a/mesalib/src/gallium/auxiliary/util/u_format_r11g11b10f.h
+++ b/mesalib/src/gallium/auxiliary/util/u_format_r11g11b10f.h
@@ -27,6 +27,7 @@
* below.
*/
+#define UF11(e, m) ((e << 6) | (m))
#define UF11_EXPONENT_BIAS 15
#define UF11_EXPONENT_BITS 0x1F
#define UF11_EXPONENT_SHIFT 6
@@ -34,10 +35,11 @@
#define UF11_MANTISSA_SHIFT (23 - UF11_EXPONENT_SHIFT)
#define UF11_MAX_EXPONENT (UF11_EXPONENT_BITS << UF11_EXPONENT_SHIFT)
+#define UF10(e, m) ((e << 5) | (m))
#define UF10_EXPONENT_BIAS 15
#define UF10_EXPONENT_BITS 0x1F
#define UF10_EXPONENT_SHIFT 5
-#define UF10_MANTISSA_BITS 0x3F
+#define UF10_MANTISSA_BITS 0x1F
#define UF10_MANTISSA_SHIFT (23 - UF10_EXPONENT_SHIFT)
#define UF10_MAX_EXPONENT (UF10_EXPONENT_BITS << UF10_EXPONENT_SHIFT)
@@ -58,14 +60,30 @@ static INLINE unsigned f32_to_uf11(float val)
int exponent = ((f32.ui >> 23) & 0xff) - 127;
int mantissa = f32.ui & 0x007fffff;
- if (sign) return 0;
-
if (exponent == 128) { /* Infinity or NaN */
+ /* From the GL_EXT_packed_float spec:
+ *
+ * "Additionally: negative infinity is converted to zero; positive
+ * infinity is converted to positive infinity; and both positive and
+ * negative NaN are converted to positive NaN."
+ */
uf11 = UF11_MAX_EXPONENT;
- if (mantissa) uf11 |= (mantissa & UF11_MANTISSA_BITS);
- }
- else if (exponent > 15) { /* Overflow - flush to Infinity */
- uf11 = UF11_MAX_EXPONENT;
+ if (mantissa) {
+ uf11 |= 1; /* NaN */
+ } else {
+ if (sign)
+ uf11 = 0; /* 0.0 */
+ }
+ } else if (sign) {
+ return 0;
+ } else if (val > 65024.0f) {
+ /* From the GL_EXT_packed_float spec:
+ *
+ * "Likewise, finite positive values greater than 65024 (the maximum
+ * finite representable unsigned 11-bit floating-point value) are
+ * converted to 65024."
+ */
+ uf11 = UF11(30, 63);
}
else if (exponent > -15) { /* Representable value */
exponent += UF11_EXPONENT_BIAS;
@@ -128,14 +146,30 @@ static INLINE unsigned f32_to_uf10(float val)
int exponent = ((f32.ui >> 23) & 0xff) - 127;
int mantissa = f32.ui & 0x007fffff;
- if (sign) return 0;
-
- if (exponent == 128) { /* Infinity or NaN */
- uf10 = UF10_MAX_EXPONENT;
- if (mantissa) uf10 |= (mantissa & UF10_MANTISSA_BITS);
- }
- else if (exponent > 15) { /* Overflow - flush to Infinity */
+ if (exponent == 128) {
+ /* From the GL_EXT_packed_float spec:
+ *
+ * "Additionally: negative infinity is converted to zero; positive
+ * infinity is converted to positive infinity; and both positive and
+ * negative NaN are converted to positive NaN."
+ */
uf10 = UF10_MAX_EXPONENT;
+ if (mantissa) {
+ uf10 |= 1; /* NaN */
+ } else {
+ if (sign)
+ uf10 = 0; /* 0.0 */
+ }
+ } else if (sign) {
+ return 0;
+ } else if (val > 64512.0f) { /* Overflow - flush to Infinity */
+ /* From the GL_EXT_packed_float spec:
+ *
+ * "Likewise, finite positive values greater than 64512 (the maximum
+ * finite representable unsigned 10-bit floating-point value) are
+ * converted to 64512."
+ */
+ uf10 = UF10(30, 31);
}
else if (exponent > -15) { /* Representable value */
exponent += UF10_EXPONENT_BIAS;
@@ -153,8 +187,8 @@ static INLINE float uf10_to_f32(uint16_t val)
uint32_t ui;
} f32;
- int exponent = (val & 0x07c0) >> UF10_EXPONENT_SHIFT;
- int mantissa = (val & 0x003f);
+ int exponent = (val & 0x03e0) >> UF10_EXPONENT_SHIFT;
+ int mantissa = (val & 0x001f);
f32.f = 0.0;
diff --git a/mesalib/src/gallium/auxiliary/util/u_format_table.py b/mesalib/src/gallium/auxiliary/util/u_format_table.py
index 250a53598..703d99959 100644
--- a/mesalib/src/gallium/auxiliary/util/u_format_table.py
+++ b/mesalib/src/gallium/auxiliary/util/u_format_table.py
@@ -115,7 +115,7 @@ def write_format_table(formats):
if channel.size:
print " {%s, %s, %s, %u}%s\t/* %s = %s */" % (type_map[channel.type], bool_map(channel.norm), bool_map(channel.pure), channel.size, sep, "xyzw"[i], channel.name)
else:
- print " {0, 0, 0}%s" % (sep,)
+ print " {0, 0, 0, 0}%s" % (sep,)
print " },"
print " {"
for i in range(4):
diff --git a/mesalib/src/gallium/auxiliary/util/u_math.h b/mesalib/src/gallium/auxiliary/util/u_math.h
index c74c1da76..b9295f4f8 100644
--- a/mesalib/src/gallium/auxiliary/util/u_math.h
+++ b/mesalib/src/gallium/auxiliary/util/u_math.h
@@ -574,6 +574,19 @@ util_bitcount(unsigned n)
/**
+ * Convert from little endian to CPU byte order.
+ */
+
+#ifdef PIPE_ARCH_BIG_ENDIAN
+#define util_le32_to_cpu(x) util_bswap32(x)
+#define util_le16_to_cpu(x) util_bswap16(x)
+#else
+#define util_le32_to_cpu(x) (x)
+#define util_le16_to_cpu(x) (x)
+#endif
+
+
+/**
* Reverse byte order of a 32 bit word.
*/
static INLINE uint32_t