Load 0f32 with xor instead of mov

mkeeter · Mar 25, 2024 · 51c6410 · 51c6410
1 parent 7bf6f59
commit 51c6410
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Showing 2 changed files with 3 additions and 3 deletions.
diff --git a/fidget/src/jit/x86_64/grad_slice.rs b/fidget/src/jit/x86_64/grad_slice.rs
@@ -78,7 +78,7 @@ impl Assembler for GradSliceAssembler {
             ; mov [rbp - (input_pos - 0x18)], eax // d/dy(y) = 1
             ; mov [rbp - (input_pos - 0x2c)], eax // d/dz(z) = 1
 
-            ; mov eax, 0.0f32.to_bits() as i32
+            ; xor eax, eax // set eax to 0u32, which is also 0f32
             ; mov [rbp - (input_pos - 0x8)], eax // d/dy(x) = 0
             ; mov [rbp - (input_pos - 0xc)], eax // d/dz(x) = 0
             ; mov [rbp - (input_pos - 0x14)], eax // d/dx(y) = 0
@@ -395,7 +395,7 @@ impl Assembler for GradSliceAssembler {
             ; jb >L
 
             // Fall-through for equal
-            ; mov eax, 0f32.to_bits() as i32
+            ; xor eax, eax // set eax to 0u32, which is also 0f32
             ; vmovd Rx(reg(out_reg)), eax
             ; jmp >O
 

diff --git a/fidget/src/jit/x86_64/point.rs b/fidget/src/jit/x86_64/point.rs
@@ -294,7 +294,7 @@ impl Assembler for PointAssembler {
             ; jb >L
 
             // Fall-through for equal
-            ; mov eax, 0f32.to_bits() as i32
+            ; xor eax, eax // set eax to 0u32, which is also 0f32
             ; vmovd Rx(reg(out_reg)), eax
             ; jmp >O