From: Rob Clark <robdcl...@gmail.com>
changes by Karol:
v2: make compatible with 64 bit floats
fix isfinite
v3: use snake_case.
Signed-off-by: Karol Herbst <kher...@redhat.com>
---
src/compiler/spirv/vtn_alu.c | 32 ++++++++++++++++++++++++++++++++
1 file changed, 32 insertions(+)
diff --git a/src/compiler/spirv/vtn_alu.c b/src/compiler/spirv/vtn_alu.c
index b1492c1501a..ea25d4bcbdc 100644
--- a/src/compiler/spirv/vtn_alu.c
+++ b/src/compiler/spirv/vtn_alu.c
@@ -583,6 +583,38 @@ vtn_handle_alu(struct vtn_builder *b, SpvOp opcode,
break;
}
+ case SpvOpIsFinite: {
+ nir_ssa_def *inf = nir_imm_floatN_t(&b->nb, INFINITY, src[0]->bit_size);
+ nir_ssa_def *is_number = nir_feq(&b->nb, src[0], src[0]);
+ nir_ssa_def *is_not_inf = nir_ine(&b->nb, nir_fabs(&b->nb, src[0]), inf);
+ val->ssa->def = nir_iand(&b->nb, is_number, is_not_inf);
+ break;
+ }
+
+ case SpvOpIsNormal: {
+ unsigned bit_size = src[0]->bit_size;
+
+ uint32_t m;
+ if (bit_size == 64)
+ m = 11;
+ else if (bit_size == 32)
+ m = 8;
+ else if (bit_size == 16)
+ m = 5;
+ else
+ assert(!"unknown float type");
+
+ nir_ssa_def *shift = nir_imm_int(&b->nb, bit_size - m - 1);
+ nir_ssa_def *abs = nir_fabs(&b->nb, src[0]);
+ nir_ssa_def *exp = nir_iadd(&b->nb,
+ nir_ushr(&b->nb, abs, shift),
+ nir_imm_intN_t(&b->nb, -1, bit_size));
+ val->ssa->def = nir_ult(&b->nb,
+ exp,
+ nir_imm_intN_t(&b->nb, (1 << m) - 2, bit_size));
+ break;
+ }
+
case SpvOpFUnordEqual:
case SpvOpFUnordNotEqual:
case SpvOpFUnordLessThan:
--
2.19.1
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