From f921b42c8c9dd250e18c6e1a3315294d24f53af3 Mon Sep 17 00:00:00 2001
From: Georg Lehmann <dadschoorse@gmail.com>
Date: Sat, 8 Feb 2025 18:38:55 +0100
Subject: [PATCH] nir/print: print large floats as mantissa + exponent

This is silly:
con 64    %18698 = load_const (0xf0f0f0f0f0f0f0f0 = -107730874267432137203343331820822035577514310242782965586097631855966576162301880634213986293205127792322062538351156704152182839736964151026851280176102232488321269248467172131803507875122376996725092200401040958124190100858265776685056.000000 = -1085102592571150096 = 17361641481138401520)

This is better:
con 64    %18698 = load_const (0xf0f0f0f0f0f0f0f0 = -1.077309e+236 = -1085102592571150096 = 17361641481138401520)

Reviewed-by: Konstantin Seurer <konstantin.seurer@gmail.com>
Reviewed-by: Faith Ekstrand <faith.ekstrand@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/33456>
---
 src/compiler/nir/nir_print.c | 19 ++++++-------------
 1 file changed, 6 insertions(+), 13 deletions(-)

diff --git a/src/compiler/nir/nir_print.c b/src/compiler/nir/nir_print.c
index 8030199bf2f..200009e7476 100644
--- a/src/compiler/nir/nir_print.c
+++ b/src/compiler/nir/nir_print.c
@@ -210,19 +210,12 @@ print_hex_terse_const_value(const nir_const_value *value, unsigned bit_size, FIL
 static void
 print_float_const_value(const nir_const_value *value, unsigned bit_size, FILE *fp)
 {
-   switch (bit_size) {
-   case 64:
-      fprintf(fp, "%f", value->f64);
-      break;
-   case 32:
-      fprintf(fp, "%f", value->f32);
-      break;
-   case 16:
-      fprintf(fp, "%f", _mesa_half_to_float(value->u16));
-      break;
-   default:
-      unreachable("unhandled bit size");
-   }
+   double dval = nir_const_value_as_float(*value, bit_size);
+
+   if (fabs(dval) >= 1000000.0)
+      fprintf(fp, "%e", dval);
+   else
+      fprintf(fp, "%f", dval);
 }
 
 static void