[Mesa-dev] [PATCH 3/5] nir: Delete all traces of nir_op_fexp

[Ian Romanick]

From: Ian Romanick <ian.d.romanick at intel.com>

Nothing produces it, and nothing can consume it.

Signed-off-by: Ian Romanick <ian.d.romanick at intel.com>
---
 src/glsl/nir/nir_opcodes.py              | 1 -
 src/glsl/nir/nir_opt_algebraic.py        | 7 -------
 src/mesa/drivers/dri/i965/brw_fs_nir.cpp | 1 -
 3 files changed, 9 deletions(-)

diff --git a/src/glsl/nir/nir_opcodes.py b/src/glsl/nir/nir_opcodes.py
index 264806f..10bab43 100644
--- a/src/glsl/nir/nir_opcodes.py
+++ b/src/glsl/nir/nir_opcodes.py
@@ -153,7 +153,6 @@ unop("fsat", tfloat, "(src0 > 1.0f) ? 1.0f : ((src0 <= 0.0f) ? 0.0f : src0)")
 unop("frcp", tfloat, "1.0f / src0")
 unop("frsq", tfloat, "1.0f / sqrtf(src0)")
 unop("fsqrt", tfloat, "sqrtf(src0)")
-unop("fexp", tfloat, "expf(src0)") # < e^x
 unop("flog", tfloat, "logf(src0)") # log base e
 unop("fexp2", tfloat, "exp2f(src0)")
 unop("flog2", tfloat, "log2f(src0)")
diff --git a/src/glsl/nir/nir_opt_algebraic.py b/src/glsl/nir/nir_opt_algebraic.py
index 2a2b956..5f9c202 100644
--- a/src/glsl/nir/nir_opt_algebraic.py
+++ b/src/glsl/nir/nir_opt_algebraic.py
@@ -136,22 +136,16 @@ optimizations = [
    (('ushr', a, 0), a),
    # Exponential/logarithmic identities
    (('fexp2', ('flog2', a)), a), # 2^lg2(a) = a
-   (('fexp',  ('flog',  a)), a), # e^ln(a)  = a
    (('flog2', ('fexp2', a)), a), # lg2(2^a) = a
-   (('flog',  ('fexp',  a)), a), # ln(e^a)  = a
    (('fpow', a, b), ('fexp2', ('fmul', ('flog2', a), b)), 'options->lower_fpow'), # a^b = 2^(lg2(a)*b)
    (('fexp2', ('fmul', ('flog2', a), b)), ('fpow', a, b), '!options->lower_fpow'), # 2^(lg2(a)*b) = a^b
-   (('fexp',  ('fmul', ('flog', a), b)),  ('fpow', a, b), '!options->lower_fpow'), # e^(ln(a)*b) = a^b
    (('fpow', a, 1.0), a),
    (('fpow', a, 2.0), ('fmul', a, a)),
    (('fpow', a, 4.0), ('fmul', ('fmul', a, a), ('fmul', a, a))),
    (('fpow', 2.0, a), ('fexp2', a)),
    (('fsqrt', ('fexp2', a)), ('fexp2', ('fmul', 0.5, a))),
-   (('fsqrt', ('fexp', a)), ('fexp', ('fmul', 0.5, a))),
    (('frcp', ('fexp2', a)), ('fexp2', ('fneg', a))),
-   (('frcp', ('fexp', a)), ('fexp', ('fneg', a))),
    (('frsq', ('fexp2', a)), ('fexp2', ('fmul', -0.5, a))),
-   (('frsq', ('fexp', a)), ('fexp', ('fmul', -0.5, a))),
    (('flog2', ('fsqrt', a)), ('fmul', 0.5, ('flog2', a))),
    (('flog', ('fsqrt', a)), ('fmul', 0.5, ('flog', a))),
    (('flog2', ('frcp', a)), ('fneg', ('flog2', a))),
@@ -165,7 +159,6 @@ optimizations = [
    (('fadd', ('flog2', a), ('fneg', ('flog2', b))), ('flog2', ('fdiv', a, b))),
    (('fadd', ('flog', a), ('fneg', ('flog', b))), ('flog', ('fdiv', a, b))),
    (('fmul', ('fexp2', a), ('fexp2', b)), ('fexp2', ('fadd', a, b))),
-   (('fmul', ('fexp', a), ('fexp', b)), ('fexp', ('fadd', a, b))),
    # Division and reciprocal
    (('fdiv', 1.0, a), ('frcp', a)),
    (('frcp', ('frcp', a)), a),
diff --git a/src/mesa/drivers/dri/i965/brw_fs_nir.cpp b/src/mesa/drivers/dri/i965/brw_fs_nir.cpp
index 555987d..164d0f8 100644
--- a/src/mesa/drivers/dri/i965/brw_fs_nir.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs_nir.cpp
@@ -722,7 +722,6 @@ fs_visitor::nir_emit_alu(nir_alu_instr *instr)
       inst->saturate = instr->dest.saturate;
       break;
 
-   case nir_op_fexp:
    case nir_op_flog:
       unreachable("not reached: should be handled by ir_explog_to_explog2");
 
-- 
2.1.0