fdo-mirrors/mesa
1
0
Fork 0
mirror of https://gitlab.freedesktop.org/mesa/mesa.git synced 2025-12-23 00:20:09 +01:00
Code Issues Projects Releases Packages Wiki Activity Actions 1

nir/spirv/glsl450: Add helpers for calculating exp() and log().

Browse source
This commit is contained in:
Kenneth Graunke 2015-12-29 15:15:05 -08:00
parent 9c9edd1ce8
commit 0f801752f2
1 changed files with 19 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

19
src/glsl/nir/spirv/vtn_glsl450.c
View file

@ -41,6 +41,25 @@ build_length(nir_builder *b, nir_ssa_def *vec)
}
}
/**
* Return e^x.
*/
static nir_ssa_def *
build_exp(nir_builder *b, nir_ssa_def *x)
{
return nir_fexp2(b, nir_fmul(b, x, nir_imm_float(b, M_LOG2E)));
}
/**
* Return ln(x) - the natural logarithm of x.
*/
static nir_ssa_def *
build_log(nir_builder *b, nir_ssa_def *x)
{
return nir_fmul(b, nir_flog2(b, x), nir_imm_float(b, 1.0 / M_LOG2E));
}
static void
handle_glsl450_alu(struct vtn_builder *b, enum GLSLstd450 entrypoint,
const uint32_t *w, unsigned count)