compiler/spirv: implement 16-bit exp and log

v2
 - use nir_fmul_imm helper (Jason)

Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>

diff --git a/src/compiler/spirv/vtn_glsl450.c b/src/compiler/spirv/vtn_glsl450.c
index 7e81369..7984c7c 100644 (file)
--- a/src/compiler/spirv/vtn_glsl450.c
+++ b/src/compiler/spirv/vtn_glsl450.c
@@ -177,7 +177,7 @@ matrix_inverse(struct vtn_builder *b, struct vtn_ssa_value *src)
 static nir_ssa_def *
 build_exp(nir_builder *b, nir_ssa_def *x)
 {
-   return nir_fexp2(b, nir_fmul(b, x, nir_imm_float(b, M_LOG2E)));
+   return nir_fexp2(b, nir_fmul_imm(b, x, M_LOG2E));
 }
 
 /**
@@ -186,7 +186,7 @@ build_exp(nir_builder *b, nir_ssa_def *x)
 static nir_ssa_def *
 build_log(nir_builder *b, nir_ssa_def *x)
 {
-   return nir_fmul(b, nir_flog2(b, x), nir_imm_float(b, 1.0 / M_LOG2E));
+   return nir_fmul_imm(b, nir_flog2(b, x), 1.0 / M_LOG2E);
 }
 
 /**