OpenHarmony/third_party_mesa3d
2
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

gallium/tgsi: correct typo propagated from NV_vertex_program1_1

Browse Source 
In the specification text of NV_vertex_program1_1, the upper
limit of the RCC instruction is written as 1.884467e+19 in
scientific notation, but as 0x5F800000 in binary. But the binary
version translates to 1.84467e+19 rather than 1.884467e+19 in
scientific notation.

Since the lower-limit equals 2^-64 and the binary version equals
2^+64, let's assume the value in scientific notation is a typo
and implement this using the value from the binary version
instead.

Signed-off-by: Erik Faye-Lund <kusmabite@gmail.com>
Reviewed-by: Brian Paul <brianp@vmware.com>
This commit is contained in:
Erik Faye-Lund
2014-02-07 13:45:11 +01:00
committed by Brian Paul
parent 7a49a796a4
commit 5125165dde
2 changed files with 3 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
src/gallium/auxiliary/tgsi/tgsi_exec.c
View File

@@ -915,9 +915,9 @@ micro_rcc(union tgsi_exec_channel *dst,
float recip = 1.0f / src->f[i];
if (recip > 0.0f)
dst->f[i] = CLAMP(recip, 5.42101e-020f, 1.884467e+019f);
dst->f[i] = CLAMP(recip, 5.42101e-020f, 1.84467e+019f);
else
dst->f[i] = CLAMP(recip, -1.884467e+019f, -5.42101e-020f);
dst->f[i] = CLAMP(recip, -1.84467e+019f, -5.42101e-020f);
}
}

2
src/gallium/docs/source/tgsi.rst
View File

@@ -424,7 +424,7 @@ XXX cleanup on aisle three
.. math::
dst = (1 / src.x) > 0 ? clamp(1 / src.x, 5.42101e-020, 1.884467e+019) : clamp(1 / src.x, -1.884467e+019, -5.42101e-020)
dst = (1 / src.x) > 0 ? clamp(1 / src.x, 5.42101e-020, 1.84467e+019) : clamp(1 / src.x, -1.84467e+019, -5.42101e-020)
.. opcode:: DPH - Homogeneous Dot Product