diff --git a/libs/vkd3d-shader/d3dbc.c b/libs/vkd3d-shader/d3dbc.c
index 9673459f..5532ee20 100644
--- a/libs/vkd3d-shader/d3dbc.c
+++ b/libs/vkd3d-shader/d3dbc.c
@@ -2269,18 +2269,17 @@ static void d3dbc_write_vsir_dcl(struct d3dbc_compiler *d3dbc, const struct vkd3
     }
 }
 
-static void d3dbc_write_vsir_simple_instruction(struct d3dbc_compiler *d3dbc,
-        const struct vkd3d_shader_instruction *ins)
+static const struct vkd3d_sm1_opcode_info *shader_sm1_get_opcode_info_from_vsir_instruction(
+        struct d3dbc_compiler *d3dbc, const struct vkd3d_shader_instruction *ins)
 {
     const struct vkd3d_sm1_opcode_info *info;
-    struct sm1_instruction instr = {0};
 
     if (!(info = shader_sm1_get_opcode_info_from_vsir(d3dbc, ins->opcode)))
     {
         vkd3d_shader_error(d3dbc->message_context, &ins->location, VKD3D_SHADER_ERROR_D3DBC_INVALID_OPCODE,
                 "Opcode %#x not supported for shader profile.", ins->opcode);
         d3dbc->failed = true;
-        return;
+        return NULL;
     }
 
     if (ins->dst_count != info->dst_count)
@@ -2289,7 +2288,7 @@ static void d3dbc_write_vsir_simple_instruction(struct d3dbc_compiler *d3dbc,
                 "Invalid destination count %u for vsir instruction %#x (expected %u).",
                 ins->dst_count, ins->opcode, info->dst_count);
         d3dbc->failed = true;
-        return;
+        return NULL;
     }
     if (ins->src_count != info->src_count)
     {
@@ -2297,9 +2296,21 @@ static void d3dbc_write_vsir_simple_instruction(struct d3dbc_compiler *d3dbc,
                 "Invalid source count %u for vsir instruction %#x (expected %u).",
                 ins->src_count, ins->opcode, info->src_count);
         d3dbc->failed = true;
-        return;
+        return NULL;
     }
 
+    return info;
+}
+
+static void d3dbc_write_vsir_simple_instruction(struct d3dbc_compiler *d3dbc,
+        const struct vkd3d_shader_instruction *ins)
+{
+    struct sm1_instruction instr = {0};
+    const struct vkd3d_sm1_opcode_info *info;
+
+    if (!(info = shader_sm1_get_opcode_info_from_vsir_instruction(d3dbc, ins)))
+        return;
+
     instr.opcode = info->sm1_opcode;
     instr.has_dst = info->dst_count;
     instr.src_count = info->src_count;
@@ -2314,6 +2325,8 @@ static void d3dbc_write_vsir_simple_instruction(struct d3dbc_compiler *d3dbc,
 
 static void d3dbc_write_vsir_instruction(struct d3dbc_compiler *d3dbc, const struct vkd3d_shader_instruction *ins)
 {
+    uint32_t writemask;
+
     switch (ins->opcode)
     {
         case VKD3DSIH_DEF:
@@ -2339,6 +2352,23 @@ static void d3dbc_write_vsir_instruction(struct d3dbc_compiler *d3dbc, const str
             d3dbc_write_vsir_simple_instruction(d3dbc, ins);
             break;
 
+        case VKD3DSIH_EXP:
+        case VKD3DSIH_LOG:
+        case VKD3DSIH_RCP:
+        case VKD3DSIH_RSQ:
+            writemask = ins->dst->write_mask;
+            if (writemask != VKD3DSP_WRITEMASK_0 && writemask != VKD3DSP_WRITEMASK_1
+                    && writemask != VKD3DSP_WRITEMASK_2 && writemask != VKD3DSP_WRITEMASK_3)
+            {
+                vkd3d_shader_error(d3dbc->message_context, &ins->location,
+                        VKD3D_SHADER_ERROR_D3DBC_INVALID_WRITEMASK,
+                        "writemask %#x for vsir instruction with opcode %#x is not single component.",
+                        writemask, ins->opcode);
+                d3dbc->failed = true;
+            }
+            d3dbc_write_vsir_simple_instruction(d3dbc, ins);
+            break;
+
         default:
             vkd3d_shader_error(d3dbc->message_context, &ins->location, VKD3D_SHADER_ERROR_D3DBC_INVALID_OPCODE,
                    "vsir instruction with opcode %#x.", ins->opcode);
@@ -2412,23 +2442,6 @@ static void d3dbc_write_semantic_dcls(struct d3dbc_compiler *d3dbc)
     }
 }
 
-static void d3dbc_write_per_component_unary_op(struct d3dbc_compiler *d3dbc,
-        const struct hlsl_ir_node *instr, enum vkd3d_sm1_opcode opcode)
-{
-    struct hlsl_ir_expr *expr = hlsl_ir_expr(instr);
-    struct hlsl_ir_node *arg1 = expr->operands[0].node;
-    unsigned int i;
-
-    for (i = 0; i < instr->data_type->dimx; ++i)
-    {
-        struct hlsl_reg src = arg1->reg, dst = instr->reg;
-
-        src.writemask = hlsl_combine_writemasks(src.writemask, 1u << i);
-        dst.writemask = hlsl_combine_writemasks(dst.writemask, 1u << i);
-        d3dbc_write_unary_op(d3dbc, opcode, &dst, &src, 0, 0);
-    }
-}
-
 static void d3dbc_write_sincos(struct d3dbc_compiler *d3dbc, enum hlsl_ir_expr_op op,
         const struct hlsl_reg *dst, const struct hlsl_reg *src)
 {
@@ -2499,22 +2512,6 @@ static void d3dbc_write_expr(struct d3dbc_compiler *d3dbc, const struct hlsl_ir_
 
     switch (expr->op)
     {
-        case HLSL_OP1_EXP2:
-            d3dbc_write_per_component_unary_op(d3dbc, instr, VKD3D_SM1_OP_EXP);
-            break;
-
-        case HLSL_OP1_LOG2:
-            d3dbc_write_per_component_unary_op(d3dbc, instr, VKD3D_SM1_OP_LOG);
-            break;
-
-        case HLSL_OP1_RCP:
-            d3dbc_write_per_component_unary_op(d3dbc, instr, VKD3D_SM1_OP_RCP);
-            break;
-
-        case HLSL_OP1_RSQ:
-            d3dbc_write_per_component_unary_op(d3dbc, instr, VKD3D_SM1_OP_RSQ);
-            break;
-
         case HLSL_OP1_COS_REDUCED:
         case HLSL_OP1_SIN_REDUCED:
             d3dbc_write_sincos(d3dbc, expr->op, &instr->reg, &arg1->reg);
diff --git a/libs/vkd3d-shader/hlsl_codegen.c b/libs/vkd3d-shader/hlsl_codegen.c
index d994f89c..5cf35ecc 100644
--- a/libs/vkd3d-shader/hlsl_codegen.c
+++ b/libs/vkd3d-shader/hlsl_codegen.c
@@ -6558,6 +6558,78 @@ static void sm1_generate_vsir_instr_expr_single_instr_op(struct hlsl_ctx *ctx, s
     hlsl_replace_node(instr, vsir_instr);
 }
 
+/* Translate ops that have 1 src and need one instruction for each component in
+ * the d3dbc backend. */
+static void sm1_generate_vsir_instr_expr_per_component_instr_op(struct hlsl_ctx *ctx,
+        struct vsir_program *program, struct hlsl_ir_expr *expr, enum vkd3d_shader_opcode opcode)
+{
+    struct vkd3d_shader_instruction_array *instructions = &program->instructions;
+    struct hlsl_ir_node *operand = expr->operands[0].node;
+    struct hlsl_ir_node *instr = &expr->node;
+    struct vkd3d_shader_dst_param *dst_param;
+    struct vkd3d_shader_src_param *src_param;
+    struct hlsl_ir_node *vsir_instr = NULL;
+    struct vkd3d_shader_instruction *ins;
+    uint32_t src_swizzle;
+    unsigned int i, c;
+
+    VKD3D_ASSERT(instr->reg.allocated);
+    VKD3D_ASSERT(operand);
+
+    src_swizzle = sm1_generate_vsir_get_src_swizzle(operand->reg.writemask, instr->reg.writemask);
+    for (i = 0; i < 4; ++i)
+    {
+        if (instr->reg.writemask & (1u << i))
+        {
+            if (!(ins = generate_vsir_add_program_instruction(ctx, program, &instr->loc, opcode, 1, 1)))
+                return;
+
+            dst_param = &ins->dst[0];
+            vsir_register_init(&dst_param->reg, VKD3DSPR_TEMP, VKD3D_DATA_FLOAT, 1);
+            dst_param->reg.idx[0].offset = instr->reg.id;
+            dst_param->write_mask = 1u << i;
+
+            src_param = &ins->src[0];
+            vsir_register_init(&src_param->reg, VKD3DSPR_TEMP, VKD3D_DATA_FLOAT, 1);
+            src_param->reg.idx[0].offset = operand->reg.id;
+            c = vsir_swizzle_get_component(src_swizzle, i);
+            src_param->swizzle = vsir_swizzle_from_writemask(1u << c);
+
+            if (!(vsir_instr = hlsl_new_vsir_instruction_ref(ctx, instructions->count - 1,
+                    hlsl_get_scalar_type(ctx, instr->data_type->e.numeric.type),
+                    &instr->reg, &instr->loc)))
+            {
+                ctx->result = VKD3D_ERROR_OUT_OF_MEMORY;
+                return;
+            }
+            list_add_before(&instr->entry, &vsir_instr->entry);
+        }
+    }
+
+    /* Replace expr with a no-op move. For the other instructions that reference it. */
+    if (!(ins = generate_vsir_add_program_instruction(ctx, program, &instr->loc, VKD3DSIH_MOV, 1, 1)))
+        return;
+
+    dst_param = &ins->dst[0];
+    vsir_register_init(&dst_param->reg, VKD3DSPR_TEMP, VKD3D_DATA_FLOAT, 1);
+    dst_param->reg.idx[0].offset = instr->reg.id;
+    dst_param->write_mask = instr->reg.writemask;
+
+    src_param = &ins->src[0];
+    vsir_register_init(&src_param->reg, VKD3DSPR_TEMP, VKD3D_DATA_FLOAT, 1);
+    src_param->reg.idx[0].offset = instr->reg.id;
+    src_param->swizzle = sm1_generate_vsir_get_src_swizzle(instr->reg.writemask, dst_param->write_mask);
+
+    if (!(vsir_instr = hlsl_new_vsir_instruction_ref(ctx, instructions->count - 1, instr->data_type,
+            &instr->reg, &instr->loc)))
+    {
+        ctx->result = VKD3D_ERROR_OUT_OF_MEMORY;
+        return;
+    }
+    list_add_before(&instr->entry, &vsir_instr->entry);
+    hlsl_replace_node(instr, vsir_instr);
+}
+
 static bool sm1_generate_vsir_instr_expr(struct hlsl_ctx *ctx, struct vsir_program *program,
         struct hlsl_ir_expr *expr)
 {
@@ -6575,10 +6647,26 @@ static bool sm1_generate_vsir_instr_expr(struct hlsl_ctx *ctx, struct vsir_progr
             sm1_generate_vsir_instr_expr_single_instr_op(ctx, program, expr, VKD3DSIH_DSY, 0, 0);
             break;
 
+        case HLSL_OP1_EXP2:
+            sm1_generate_vsir_instr_expr_per_component_instr_op(ctx, program, expr, VKD3DSIH_EXP);
+            break;
+
+        case HLSL_OP1_LOG2:
+            sm1_generate_vsir_instr_expr_per_component_instr_op(ctx, program, expr, VKD3DSIH_LOG);
+            break;
+
         case HLSL_OP1_NEG:
             sm1_generate_vsir_instr_expr_single_instr_op(ctx, program, expr, VKD3DSIH_MOV, VKD3DSPSM_NEG, 0);
             break;
 
+        case HLSL_OP1_RCP:
+            sm1_generate_vsir_instr_expr_per_component_instr_op(ctx, program, expr, VKD3DSIH_RCP);
+            break;
+
+        case HLSL_OP1_RSQ:
+            sm1_generate_vsir_instr_expr_per_component_instr_op(ctx, program, expr, VKD3DSIH_RSQ);
+            break;
+
         case HLSL_OP1_SAT:
             sm1_generate_vsir_instr_expr_single_instr_op(ctx, program, expr, VKD3DSIH_MOV, 0, VKD3DSPDM_SATURATE);
             break;
diff --git a/libs/vkd3d-shader/vkd3d_shader_private.h b/libs/vkd3d-shader/vkd3d_shader_private.h
index 9967c0d1..1c738908 100644
--- a/libs/vkd3d-shader/vkd3d_shader_private.h
+++ b/libs/vkd3d-shader/vkd3d_shader_private.h
@@ -179,6 +179,7 @@ enum vkd3d_shader_error
     VKD3D_SHADER_ERROR_D3DBC_INVALID_REGISTER_COUNT     = 7008,
     VKD3D_SHADER_ERROR_D3DBC_NOT_IMPLEMENTED            = 7009,
     VKD3D_SHADER_ERROR_D3DBC_INVALID_PROFILE            = 7010,
+    VKD3D_SHADER_ERROR_D3DBC_INVALID_WRITEMASK          = 7011,
 
     VKD3D_SHADER_WARNING_D3DBC_IGNORED_INSTRUCTION_FLAGS= 7300,