diff options
| author | Kenneth Graunke <[email protected]> | 2015-06-04 01:24:07 -0700 |
|---|---|---|
| committer | Kenneth Graunke <[email protected]> | 2015-06-04 15:32:46 -0700 |
| commit | 15a12795c6f3edef0e1cbab39b6da3d5b8f64fc3 (patch) | |
| tree | 27ba2adb1ae19f8e0b6689e417044861cd191351 /src/mesa | |
| parent | 71e94578779e4344066d434004fd85ca493de552 (diff) | |
prog_to_nir: Make RSQ properly take the absolute value of its argument.
I just botched this when writing the original code.
From the ARB_vertex_program specification:
"The RSQ instruction approximates the reciprocal of the square root of
the absolute value of the scalar operand and replicates it to all four
components of the result vector."
Fixes a Glean vertProg1 subtest:
RSQ test 2 (reciprocal square root of negative value)
Cc: [email protected]
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=90547
Signed-off-by: Kenneth Graunke <[email protected]>
Reviewed-by: Francisco Jerez <[email protected]>
Diffstat (limited to 'src/mesa')
| -rw-r--r-- | src/mesa/program/prog_to_nir.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/src/mesa/program/prog_to_nir.c b/src/mesa/program/prog_to_nir.c index e986e511514..d3e3f15c959 100644 --- a/src/mesa/program/prog_to_nir.c +++ b/src/mesa/program/prog_to_nir.c @@ -764,7 +764,8 @@ ptn_emit_instruction(struct ptn_compile *c, struct prog_instruction *prog_inst) switch (op) { case OPCODE_RSQ: - ptn_move_dest(b, dest, nir_frsq(b, ptn_channel(b, src[0], X))); + ptn_move_dest(b, dest, + nir_frsq(b, nir_fabs(b, ptn_channel(b, src[0], X)))); break; case OPCODE_RCP: |