diff options
Diffstat (limited to 'src/gallium/docs')
| -rw-r--r-- | src/gallium/docs/source/tgsi.rst | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/src/gallium/docs/source/tgsi.rst b/src/gallium/docs/source/tgsi.rst index 9976875c7bd..05b06ce6f1e 100644 --- a/src/gallium/docs/source/tgsi.rst +++ b/src/gallium/docs/source/tgsi.rst @@ -1038,6 +1038,20 @@ XXX doesn't look like most of the opcodes really belong here. dst.xy = lodq(uint, coord); +.. opcode:: CLOCK - retrieve the current shader time + + Invoking this instruction multiple times in the same shader should + cause monotonically increasing values to be returned. The values + are implicitly 64-bit, so if fewer than 64 bits of precision are + available, to provide expected wraparound semantics, the value + should be shifted up so that the most significant bit of the time + is the most significant bit of the 64-bit value. + +.. math:: + + dst.xy = clock() + + Integer ISA ^^^^^^^^^^^^^^^^^^^^^^^^ These opcodes are used for integer operations. |