[Mesa-dev] [PATCH] panfrost/midgard: Implement fpow

[Alyssa Rosenzweig]

We have a native op for this, which was just found in a disassembly --
so instead of lowering, use it!

Signed-off-by: Alyssa Rosenzweig <alyssa at rosenzweig.io>
---
 src/gallium/drivers/panfrost/midgard/helpers.h         | 1 +
 src/gallium/drivers/panfrost/midgard/midgard.h         | 2 ++
 src/gallium/drivers/panfrost/midgard/midgard_compile.c | 1 +
 src/gallium/drivers/panfrost/midgard/midgard_compile.h | 1 -
 4 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/gallium/drivers/panfrost/midgard/helpers.h b/src/gallium/drivers/panfrost/midgard/helpers.h
index b597e516f20..606eb9982e7 100644
--- a/src/gallium/drivers/panfrost/midgard/helpers.h
+++ b/src/gallium/drivers/panfrost/midgard/helpers.h
@@ -228,6 +228,7 @@ static unsigned alu_opcode_props[256] = {
         [midgard_alu_op_frcp]		 = UNIT_VLUT,
         [midgard_alu_op_frsqrt]		 = UNIT_VLUT,
         [midgard_alu_op_fsqrt]		 = UNIT_VLUT,
+        [midgard_alu_op_fpow]		 = UNIT_VLUT,
         [midgard_alu_op_fexp2]		 = UNIT_VLUT,
         [midgard_alu_op_flog2]		 = UNIT_VLUT,
 
diff --git a/src/gallium/drivers/panfrost/midgard/midgard.h b/src/gallium/drivers/panfrost/midgard/midgard.h
index f6b83d30f5d..39b1df5d915 100644
--- a/src/gallium/drivers/panfrost/midgard/midgard.h
+++ b/src/gallium/drivers/panfrost/midgard/midgard.h
@@ -108,6 +108,7 @@ typedef enum {
         midgard_alu_op_fcsel      = 0xC5,
         midgard_alu_op_fround     = 0xC6,
         midgard_alu_op_fatan_pt2  = 0xE8,
+        midgard_alu_op_fpow       = 0xEC,
         midgard_alu_op_frcp       = 0xF0,
         midgard_alu_op_frsqrt     = 0xF2,
         midgard_alu_op_fsqrt      = 0xF3,
@@ -462,6 +463,7 @@ static char *alu_opcode_names[256] = {
         [midgard_alu_op_frcp]       = "frcp",
         [midgard_alu_op_frsqrt]     = "frsqrt",
         [midgard_alu_op_fsqrt]      = "fsqrt",
+        [midgard_alu_op_fpow]       = "fpow",
         [midgard_alu_op_fexp2]      = "fexp2",
         [midgard_alu_op_flog2]      = "flog2",
         [midgard_alu_op_fsin]       = "fsin",
diff --git a/src/gallium/drivers/panfrost/midgard/midgard_compile.c b/src/gallium/drivers/panfrost/midgard/midgard_compile.c
index a6c4b4498da..7f3b6997ca0 100644
--- a/src/gallium/drivers/panfrost/midgard/midgard_compile.c
+++ b/src/gallium/drivers/panfrost/midgard/midgard_compile.c
@@ -990,6 +990,7 @@ emit_alu(compiler_context *ctx, nir_alu_instr *instr)
                 ALU_CASE(frcp, frcp);
                 ALU_CASE(frsq, frsqrt);
                 ALU_CASE(fsqrt, fsqrt);
+                ALU_CASE(fpow, fpow);
                 ALU_CASE(fexp2, fexp2);
                 ALU_CASE(flog2, flog2);
 
diff --git a/src/gallium/drivers/panfrost/midgard/midgard_compile.h b/src/gallium/drivers/panfrost/midgard/midgard_compile.h
index 2fcbc317164..6225d041c07 100644
--- a/src/gallium/drivers/panfrost/midgard/midgard_compile.h
+++ b/src/gallium/drivers/panfrost/midgard/midgard_compile.h
@@ -62,7 +62,6 @@ midgard_compile_shader_nir(nir_shader *nir, midgard_program *program, bool is_bl
 static const nir_shader_compiler_options midgard_nir_options = {
         .lower_ffma = true,
         .lower_sub = true,
-        .lower_fpow = true,
         .lower_scmp = true,
         .lower_flrp32 = true,
         .lower_flrp64 = true,
-- 
2.20.1