---
src/compiler/spirv/vtn_glsl450.c | 36 +++++++++++++++++++++-----------
1 file changed, 24 insertions(+), 12 deletions(-)
diff --git a/src/compiler/spirv/vtn_glsl450.c b/src/compiler/spirv/vtn_glsl450.c
index 4345c9c61a3..9cda80c5137 100644
--- a/src/compiler/spirv/vtn_glsl450.c
+++ b/src/compiler/spirv/vtn_glsl450.c
@@ -238,8 +238,10 @@ build_fsum(nir_builder *b, nir_ssa_def **xs, int terms)
static nir_ssa_def *
build_atan(nir_builder *b, nir_ssa_def *y_over_x)
{
+ const uint32_t bit_size = y_over_x->bit_size;
+
nir_ssa_def *abs_y_over_x = nir_fabs(b, y_over_x);
- nir_ssa_def *one = nir_imm_float(b, 1.0f);
+ nir_ssa_def *one = nir_imm_floatN_t(b, 1.0f, bit_size);
/*
* range-reduction, first step:
@@ -265,25 +267,35 @@ build_atan(nir_builder *b, nir_ssa_def *y_over_x)
nir_ssa_def *x_9 = nir_fmul(b, x_7, x_2);
nir_ssa_def *x_11 = nir_fmul(b, x_9, x_2);
+ const float coef[] = {
+ 0.9999793128310355f,
+ -0.3326756418091246f,
+ 0.1938924977115610f,
+ -0.1173503194786851f,
+ 0.0536813784310406f,
+ -0.0121323213173444f,
+ };
+
nir_ssa_def *polynomial_terms[] = {
- nir_fmul(b, x, nir_imm_float(b, 0.9999793128310355f)),
- nir_fmul(b, x_3, nir_imm_float(b, -0.3326756418091246f)),
- nir_fmul(b, x_5, nir_imm_float(b, 0.1938924977115610f)),
- nir_fmul(b, x_7, nir_imm_float(b, -0.1173503194786851f)),
- nir_fmul(b, x_9, nir_imm_float(b, 0.0536813784310406f)),
- nir_fmul(b, x_11, nir_imm_float(b, -0.0121323213173444f)),
+ nir_fmul(b, x, nir_imm_floatN_t(b, coef[0], bit_size)),
+ nir_fmul(b, x_3, nir_imm_floatN_t(b, coef[1], bit_size)),
+ nir_fmul(b, x_5, nir_imm_floatN_t(b, coef[2], bit_size)),
+ nir_fmul(b, x_7, nir_imm_floatN_t(b, coef[3], bit_size)),
+ nir_fmul(b, x_9, nir_imm_floatN_t(b, coef[4], bit_size)),
+ nir_fmul(b, x_11, nir_imm_floatN_t(b, coef[5], bit_size)),
};
nir_ssa_def *tmp =
build_fsum(b, polynomial_terms, ARRAY_SIZE(polynomial_terms));
/* range-reduction fixup */
+ nir_ssa_def *minus_2 = nir_imm_floatN_t(b, -2.0f, bit_size);
+ nir_ssa_def *m_pi_2 = nir_imm_floatN_t(b, M_PI_2f, bit_size);
+ nir_ssa_def *b2f = nir_b2f(b, nir_flt(b, one, abs_y_over_x));
+ b2f->bit_size = bit_size; /* do we prefer b2f<bitsize> opcodes? */
tmp = nir_fadd(b, tmp,
- nir_fmul(b,
- nir_b2f(b, nir_flt(b, one, abs_y_over_x)),
- nir_fadd(b, nir_fmul(b, tmp,
- nir_imm_float(b, -2.0f)),
- nir_imm_float(b, M_PI_2f))));
+ nir_fmul(b, b2f,
+ nir_fadd(b, nir_fmul(b, tmp, minus_2), m_pi_2)));
/* sign fixup */
return nir_fmul(b, tmp, nir_fsign(b, y_over_x));
--
2.17.1
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