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compiler/nir: move build_log helper into builtin-builder

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Reviewed-by: Karol Herbst <kherbst@redhat.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4318>
This commit is contained in:
Erik Faye-Lund
2020-03-12 15:58:04 +01:00
committed by Marge Bot
parent f59ae68838
commit c98e745e78
2 changed files with 13 additions and 16 deletions
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6
src/compiler/nir/nir_builtin_builder.h
View File

@@ -94,6 +94,12 @@ nir_fexp(nir_builder *b, nir_ssa_def *x)
return nir_fexp2(b, nir_fmul_imm(b, x, M_LOG2E));
}
static inline nir_ssa_def *
nir_flog(nir_builder *b, nir_ssa_def *x)
{
return nir_fmul_imm(b, nir_flog2(b, x), 1.0 / M_LOG2E);
}
static inline nir_ssa_def *
nir_umul24(nir_builder *b, nir_ssa_def *x, nir_ssa_def *y)
{

23
src/compiler/spirv/vtn_glsl450.c
View File

@@ -171,15 +171,6 @@ matrix_inverse(struct vtn_builder *b, struct vtn_ssa_value *src)
return val;
}
/**
* Return ln(x) - the natural logarithm of x.
*/
static nir_ssa_def *
build_log(nir_builder *b, nir_ssa_def *x)
{
return nir_fmul_imm(b, nir_flog2(b, x), 1.0 / M_LOG2E);
}
/**
* Approximate asin(x) by the formula:
* asin~(x) = sign(x) * (pi/2 - sqrt(1 - |x|) * (pi/2 + |x|(pi/4 - 1 + |x|(p0 + |x|p1))))
@@ -359,7 +350,7 @@ handle_glsl450_alu(struct vtn_builder *b, enum GLSLstd450 entrypoint,
return;
case GLSLstd450Log:
val->ssa->def = build_log(nb, src[0]);
val->ssa->def = nir_flog(nb, src[0]);
return;
case GLSLstd450FClamp:
@@ -472,20 +463,20 @@ handle_glsl450_alu(struct vtn_builder *b, enum GLSLstd450 entrypoint,
case GLSLstd450Asinh:
val->ssa->def = nir_fmul(nb, nir_fsign(nb, src[0]),
build_log(nb, nir_fadd(nb, nir_fabs(nb, src[0]),
nir_fsqrt(nb, nir_fadd_imm(nb, nir_fmul(nb, src[0], src[0]),
1.0f)))));
nir_flog(nb, nir_fadd(nb, nir_fabs(nb, src[0]),
nir_fsqrt(nb, nir_fadd_imm(nb, nir_fmul(nb, src[0], src[0]),
1.0f)))));
return;
case GLSLstd450Acosh:
val->ssa->def = build_log(nb, nir_fadd(nb, src[0],
val->ssa->def = nir_flog(nb, nir_fadd(nb, src[0],
nir_fsqrt(nb, nir_fadd_imm(nb, nir_fmul(nb, src[0], src[0]),
-1.0f))));
return;
case GLSLstd450Atanh: {
nir_ssa_def *one = nir_imm_floatN_t(nb, 1.0, src[0]->bit_size);
val->ssa->def =
nir_fmul_imm(nb, build_log(nb, nir_fdiv(nb, nir_fadd(nb, src[0], one),
nir_fsub(nb, one, src[0]))),
nir_fmul_imm(nb, nir_flog(nb, nir_fdiv(nb, nir_fadd(nb, src[0], one),
nir_fsub(nb, one, src[0]))),
0.5f);
return;
}