diff options
| author | Corbin Simpson <MostAwesomeDude@gmail.com> | 2010-04-01 14:41:18 -0700 |
|---|---|---|
| committer | Corbin Simpson <MostAwesomeDude@gmail.com> | 2010-04-01 14:41:18 -0700 |
| commit | 950300eb255f0e3507bf2757d16c3b5bc8ff3471 (patch) | |
| tree | 32f374257a273fd27de266005a5343aaa2577471 /src/gallium/auxiliary/util/u_half.h | |
| parent | 7e1aceaf0a1fb7b4ee44c7bc488f03b584b8b785 (diff) | |
util: Init half-float tables on demand.
Gets rid of unnecessary delays on startup and compiler-specific hax.
Diffstat (limited to 'src/gallium/auxiliary/util/u_half.h')
| -rw-r--r-- | src/gallium/auxiliary/util/u_half.h | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/src/gallium/auxiliary/util/u_half.h b/src/gallium/auxiliary/util/u_half.h index 5afdd925a6..50948cadf5 100644 --- a/src/gallium/auxiliary/util/u_half.h +++ b/src/gallium/auxiliary/util/u_half.h @@ -8,13 +8,14 @@ extern "C" { #endif - extern uint32_t util_half_to_float_mantissa_table[2048]; extern uint32_t util_half_to_float_exponent_table[64]; extern uint32_t util_half_to_float_offset_table[64]; extern uint16_t util_float_to_half_base_table[512]; extern uint8_t util_float_to_half_shift_table[512]; +void util_half_init_tables(void); + /* * Note that if the half float is a signaling NaN, the x87 FPU will turn * it into a quiet NaN immediately upon loading into a float. @@ -30,6 +31,7 @@ static INLINE uint32_t util_half_to_floatui(half h) { unsigned exp = h >> 10; + util_half_init_tables(); return util_half_to_float_mantissa_table[util_half_to_float_offset_table[exp] + (h & 0x3ff)] + util_half_to_float_exponent_table[exp]; } @@ -38,6 +40,7 @@ static INLINE float util_half_to_float(half h) { union fi r; + util_half_init_tables(); r.ui = util_half_to_floatui(h); return r.f; } @@ -46,6 +49,7 @@ static INLINE half util_floatui_to_half(uint32_t v) { unsigned signexp = v >> 23; + util_half_init_tables(); return util_float_to_half_base_table[signexp] + ((v & 0x007fffff) >> util_float_to_half_shift_table[signexp]); } @@ -54,6 +58,7 @@ static INLINE half util_float_to_half(float f) { union fi i; + util_half_init_tables(); i.f = f; return util_floatui_to_half(i.ui); } |