From 1af9e2ee77f44269e4d5a3dffbc611f84da201fb Mon Sep 17 00:00:00 2001
From: lovedheart <6277001+lovedheart@users.noreply.github.com>
Date: Sat, 16 Aug 2025 22:30:53 +0200
Subject: [PATCH 1/4] Update types.comp

Modified code (branchless) for e8m0_to_fp32
---
 .../src/ggml-vulkan/vulkan-shaders/types.comp | 24 +++++++++++--------
 1 file changed, 14 insertions(+), 10 deletions(-)

diff --git a/ggml/src/ggml-vulkan/vulkan-shaders/types.comp b/ggml/src/ggml-vulkan/vulkan-shaders/types.comp
index a36c33e26764b..85194caaa9fe7 100644
--- a/ggml/src/ggml-vulkan/vulkan-shaders/types.comp
+++ b/ggml/src/ggml-vulkan/vulkan-shaders/types.comp
@@ -1413,16 +1413,20 @@ float bf16_to_fp32(uint32_t u)
 }
 
 float e8m0_to_fp32(uint8_t x) {
-    uint32_t bits;
-
-    if (x == 0) {
-        bits = 0x00400000;
-    } else {
-        bits = x;
-        bits = bits << 23;
-    }
-
-    return uintBitsToFloat(bits);
+//    uint32_t bits;
+
+//    if (x == 0) {
+//        bits = 0x00400000;
+//    } else {
+//        bits = x;
+//        bits = bits << 23;
+//    }
+
+// branchless optimization	
+    uint ux = uint(x);
+    uint is_zero = uint(x == 0);
+    uint result = (ux << 23) * (1 - is_zero) + (0x00400000u * is_zero);
+    return uintBitsToFloat(result);
 }
 
 #endif // !defined(GGML_TYPES_COMP)

From 640e2078df8d21a999ecb383c8dc1ef2c8bc730c Mon Sep 17 00:00:00 2001
From: lovedheart <6277001+lovedheart@users.noreply.github.com>
Date: Sun, 17 Aug 2025 06:38:06 +0200
Subject: [PATCH 2/4] Update types.comp

---
 ggml/src/ggml-vulkan/vulkan-shaders/types.comp | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/ggml/src/ggml-vulkan/vulkan-shaders/types.comp b/ggml/src/ggml-vulkan/vulkan-shaders/types.comp
index 85194caaa9fe7..1ba1594f313da 100644
--- a/ggml/src/ggml-vulkan/vulkan-shaders/types.comp
+++ b/ggml/src/ggml-vulkan/vulkan-shaders/types.comp
@@ -1423,9 +1423,8 @@ float e8m0_to_fp32(uint8_t x) {
 //    }
 
 // branchless optimization	
-    uint ux = uint(x);
-    uint is_zero = uint(x == 0);
-    uint result = (ux << 23) * (1 - is_zero) + (0x00400000u * is_zero);
+	uint is_zero = uint(x == 0);
+    uint result = (uint(x) << 23) | (is_zero << 22);
     return uintBitsToFloat(result);
 }
 

From 31efd0c12baa99741fe851973972c431508eb93e Mon Sep 17 00:00:00 2001
From: lovedheart <6277001+lovedheart@users.noreply.github.com>
Date: Tue, 19 Aug 2025 11:23:33 +0200
Subject: [PATCH 3/4] Update types.comp

---
 ggml/src/ggml-vulkan/vulkan-shaders/types.comp | 11 +----------
 1 file changed, 1 insertion(+), 10 deletions(-)

diff --git a/ggml/src/ggml-vulkan/vulkan-shaders/types.comp b/ggml/src/ggml-vulkan/vulkan-shaders/types.comp
index 1ba1594f313da..7bcca52fa72a2 100644
--- a/ggml/src/ggml-vulkan/vulkan-shaders/types.comp
+++ b/ggml/src/ggml-vulkan/vulkan-shaders/types.comp
@@ -1413,16 +1413,7 @@ float bf16_to_fp32(uint32_t u)
 }
 
 float e8m0_to_fp32(uint8_t x) {
-//    uint32_t bits;
-
-//    if (x == 0) {
-//        bits = 0x00400000;
-//    } else {
-//        bits = x;
-//        bits = bits << 23;
-//    }
-
-// branchless optimization	
+// branchless implementation	
 	uint is_zero = uint(x == 0);
     uint result = (uint(x) << 23) | (is_zero << 22);
     return uintBitsToFloat(result);

From 076bd2b90c4a5bd0ea5ad3ae9df90abdf62488b7 Mon Sep 17 00:00:00 2001
From: lovedheart <6277001+lovedheart@users.noreply.github.com>
Date: Tue, 19 Aug 2025 22:38:24 +0200
Subject: [PATCH 4/4] Update types.comp

---
 ggml/src/ggml-vulkan/vulkan-shaders/types.comp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/ggml/src/ggml-vulkan/vulkan-shaders/types.comp b/ggml/src/ggml-vulkan/vulkan-shaders/types.comp
index 7bcca52fa72a2..74342d3f9a703 100644
--- a/ggml/src/ggml-vulkan/vulkan-shaders/types.comp
+++ b/ggml/src/ggml-vulkan/vulkan-shaders/types.comp
@@ -1413,8 +1413,8 @@ float bf16_to_fp32(uint32_t u)
 }
 
 float e8m0_to_fp32(uint8_t x) {
-// branchless implementation	
-	uint is_zero = uint(x == 0);
+// branchless implementation
+    uint is_zero = uint(x == 0);
     uint result = (uint(x) << 23) | (is_zero << 22);
     return uintBitsToFloat(result);
 }