pan/bit: Add fexp2_fast test

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4615>

diff --git a/src/panfrost/bifrost/test/bi_test_pack.c b/src/panfrost/bifrost/test/bi_test_pack.c
index e097d74b8d9257e8a8c9ffbd459e09f7f892953f..ac0a80572db7a02c046436feb1d22280c1fe75f0 100644 (file)
--- a/src/panfrost/bifrost/test/bi_test_pack.c
+++ b/src/panfrost/bifrost/test/bi_test_pack.c
@@ -295,14 +295,28 @@ static void
 bit_special_helper(struct panfrost_device *dev,
                 unsigned size, uint32_t *input, enum bit_debug debug)
 {
-        bi_instruction ins = bit_ins(BI_SPECIAL, 1, nir_type_float, size);
+        bi_instruction ins = bit_ins(BI_SPECIAL, 2, nir_type_float, size);
+        uint32_t exp_input[4];
+
+        for (enum bi_special_op op = BI_SPECIAL_FRCP; op <= BI_SPECIAL_EXP2_LOW; ++op) {
+                if (op == BI_SPECIAL_EXP2_LOW) {
+                        /* exp2 only supported in fp32 mode */
+                        if (size != 32)
+                                continue;
+
+                        /* Give expected input */
+                        exp_input[1] = input[0];
+                        float *ff = (float *) input;
+                        exp_input[0] = (int) (ff[0] * (1 << 24));
+                }
 
-        for (enum bi_special_op op = BI_SPECIAL_FRCP; op <= BI_SPECIAL_FRSQ; ++op) {
                 for (unsigned c = 0; c < ((size == 16) ? 2 : 1); ++c) {
                         ins.op.special = op;
                         ins.swizzle[0][0] = c;
 
-                        if (!bit_test_single(dev, &ins, input, false, debug)) {
+                        if (!bit_test_single(dev, &ins,
+                                                op == BI_SPECIAL_EXP2_LOW ? exp_input : input,
+                                                false, debug)) {
                                 fprintf(stderr, "FAIL: special%u.%s\n",
                                                 size, bi_special_op_name(op));
                         }